* [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2)
@ 2024-10-02 7:26 syzbot
2024-10-02 7:56 ` Roberto Sassu
2024-10-13 19:06 ` syzbot
0 siblings, 2 replies; 5+ messages in thread
From: syzbot @ 2024-10-02 7:26 UTC (permalink / raw)
To: dmitry.kasatkin, eric.snowberg, jmorris, linux-integrity,
linux-kernel, linux-security-module, paul, roberto.sassu, serge,
syzkaller-bugs, zohar
Hello,
syzbot found the following issue on:
HEAD commit: ad46e8f95e93 Merge tag 'pm-6.12-rc1-2' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1177d507980000
kernel config: https://syzkaller.appspot.com/x/.config?x=85d8f50d88ddf2a
dashboard link: https://syzkaller.appspot.com/bug?extid=91ae49e1c1a2634d20c0
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=106026a9980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/265feec46ffa/disk-ad46e8f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d0f41ea693d3/vmlinux-ad46e8f9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/45082d33d192/bzImage-ad46e8f9.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/5b5b4e4b4ff9/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+91ae49e1c1a2634d20c0@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
ima_store_template security/integrity/ima/ima_api.c:122 [inline]
ima_store_measurement+0x36b/0x8d0 security/integrity/ima/ima_api.c:383
process_measurement+0x2c11/0x3f30 security/integrity/ima/ima_main.c:380
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
<Zero or more stacks not recorded to save memory>
Uninit was stored to memory at:
sha256_transform lib/crypto/sha256.c:117 [inline]
sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
sha256_transform lib/crypto/sha256.c:117 [inline]
sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
BLEND_OP lib/crypto/sha256.c:61 [inline]
sha256_transform lib/crypto/sha256.c:91 [inline]
sha256_transform_blocks+0xf33/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
BLEND_OP lib/crypto/sha256.c:61 [inline]
sha256_transform lib/crypto/sha256.c:92 [inline]
sha256_transform_blocks+0xf7d/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
BLEND_OP lib/crypto/sha256.c:61 [inline]
sha256_transform lib/crypto/sha256.c:93 [inline]
sha256_transform_blocks+0xfb5/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
LOAD_OP lib/crypto/sha256.c:56 [inline]
sha256_transform lib/crypto/sha256.c:82 [inline]
sha256_transform_blocks+0x2c35/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
memcpy_to_iter lib/iov_iter.c:65 [inline]
iterate_kvec include/linux/iov_iter.h:86 [inline]
iterate_and_advance2 include/linux/iov_iter.h:306 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x124a/0x2b30 lib/iov_iter.c:185
copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362
copy_folio_to_iter include/linux/uio.h:189 [inline]
filemap_read+0xc13/0x1500 mm/filemap.c:2696
generic_file_read_iter+0x136/0xad0 mm/filemap.c:2833
__kernel_read+0x726/0xd30 fs/read_write.c:527
integrity_kernel_read+0x77/0x90 security/integrity/iint.c:28
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1731/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3127
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was created at:
__alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4756
alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
alloc_pages_noprof mm/mempolicy.c:2345 [inline]
folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352
filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010
__filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952
block_write_begin+0x6e/0x2b0 fs/buffer.c:2226
exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434
exfat_extend_valid_size fs/exfat/file.c:553 [inline]
exfat_file_write_iter+0x474/0xfb0 fs/exfat/file.c:588
new_sync_write fs/read_write.c:590 [inline]
vfs_write+0xb28/0x1540 fs/read_write.c:683
ksys_write+0x24f/0x4c0 fs/read_write.c:736
__do_sys_write fs/read_write.c:748 [inline]
__se_sys_write fs/read_write.c:745 [inline]
__x64_sys_write+0x93/0xe0 fs/read_write.c:745
x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 1 UID: 0 PID: 7910 Comm: syz.2.975 Not tainted 6.11.0-syzkaller-11728-gad46e8f95e93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2)
2024-10-02 7:26 [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2) syzbot
@ 2024-10-02 7:56 ` Roberto Sassu
2024-10-13 19:06 ` syzbot
1 sibling, 0 replies; 5+ messages in thread
From: Roberto Sassu @ 2024-10-02 7:56 UTC (permalink / raw)
To: syzbot, dmitry.kasatkin, eric.snowberg, jmorris, linux-integrity,
linux-kernel, linux-security-module, paul, roberto.sassu, serge,
syzkaller-bugs, zohar, willy, Yuezhang.Mo
On Wed, 2024-10-02 at 00:26 -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: ad46e8f95e93 Merge tag 'pm-6.12-rc1-2' of git://git.kernel..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1177d507980000
> kernel config: https://syzkaller.appspot.com/x/.config?x=85d8f50d88ddf2a
> dashboard link: https://syzkaller.appspot.com/bug?extid=91ae49e1c1a2634d20c0
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=106026a9980000
At a first look, it seems that IMA is measuring an uninitialized buffer
from exfat.
Uninit was created at:
__alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4756
alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
alloc_pages_noprof mm/mempolicy.c:2345 [inline]
folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352
filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010
__filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952
block_write_begin+0x6e/0x2b0 fs/buffer.c:2226
I saw there are some relevant commits in this area from the latest PRs.
Matthew, Yuezhang, could you please have a look?
Thanks!
Roberto
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/265feec46ffa/disk-ad46e8f9.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/d0f41ea693d3/vmlinux-ad46e8f9.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/45082d33d192/bzImage-ad46e8f9.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/5b5b4e4b4ff9/mount_0.gz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+91ae49e1c1a2634d20c0@syzkaller.appspotmail.com
>
> =====================================================
> BUG: KMSAN: uninit-value in ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
> ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
> ima_store_template security/integrity/ima/ima_api.c:122 [inline]
> ima_store_measurement+0x36b/0x8d0 security/integrity/ima/ima_api.c:383
> process_measurement+0x2c11/0x3f30 security/integrity/ima/ima_main.c:380
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> <Zero or more stacks not recorded to save memory>
>
> Uninit was stored to memory at:
> sha256_transform lib/crypto/sha256.c:117 [inline]
> sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
> lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
> sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
> crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
> crypto_shash_update+0x79/0xa0 crypto/shash.c:52
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> sha256_transform lib/crypto/sha256.c:117 [inline]
> sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
> lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
> sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
> crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
> crypto_shash_update+0x79/0xa0 crypto/shash.c:52
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> BLEND_OP lib/crypto/sha256.c:61 [inline]
> sha256_transform lib/crypto/sha256.c:91 [inline]
> sha256_transform_blocks+0xf33/0x2e90 lib/crypto/sha256.c:127
> lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
> sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
> crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
> crypto_shash_update+0x79/0xa0 crypto/shash.c:52
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> BLEND_OP lib/crypto/sha256.c:61 [inline]
> sha256_transform lib/crypto/sha256.c:92 [inline]
> sha256_transform_blocks+0xf7d/0x2e90 lib/crypto/sha256.c:127
> lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
> sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
> crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
> crypto_shash_update+0x79/0xa0 crypto/shash.c:52
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> BLEND_OP lib/crypto/sha256.c:61 [inline]
> sha256_transform lib/crypto/sha256.c:93 [inline]
> sha256_transform_blocks+0xfb5/0x2e90 lib/crypto/sha256.c:127
> lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
> sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
> crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
> crypto_shash_update+0x79/0xa0 crypto/shash.c:52
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> LOAD_OP lib/crypto/sha256.c:56 [inline]
> sha256_transform lib/crypto/sha256.c:82 [inline]
> sha256_transform_blocks+0x2c35/0x2e90 lib/crypto/sha256.c:127
> lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
> sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
> crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
> crypto_shash_update+0x79/0xa0 crypto/shash.c:52
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> memcpy_to_iter lib/iov_iter.c:65 [inline]
> iterate_kvec include/linux/iov_iter.h:86 [inline]
> iterate_and_advance2 include/linux/iov_iter.h:306 [inline]
> iterate_and_advance include/linux/iov_iter.h:328 [inline]
> _copy_to_iter+0x124a/0x2b30 lib/iov_iter.c:185
> copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362
> copy_folio_to_iter include/linux/uio.h:189 [inline]
> filemap_read+0xc13/0x1500 mm/filemap.c:2696
> generic_file_read_iter+0x136/0xad0 mm/filemap.c:2833
> __kernel_read+0x726/0xd30 fs/read_write.c:527
> integrity_kernel_read+0x77/0x90 security/integrity/iint.c:28
> ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
> ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
> ima_calc_file_hash+0x1731/0x3c90 security/integrity/ima/ima_crypto.c:568
> ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
> process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
> ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
> security_file_post_open+0xc6/0x540 security/security.c:3127
> do_open fs/namei.c:3776 [inline]
> path_openat+0x58cc/0x6200 fs/namei.c:3933
> do_filp_open+0x20e/0x590 fs/namei.c:3960
> do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
> do_sys_open fs/open.c:1430 [inline]
> __do_sys_open fs/open.c:1438 [inline]
> __se_sys_open fs/open.c:1434 [inline]
> __x64_sys_open+0x275/0x2d0 fs/open.c:1434
> x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was created at:
> __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4756
> alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
> alloc_pages_noprof mm/mempolicy.c:2345 [inline]
> folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352
> filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010
> __filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952
> block_write_begin+0x6e/0x2b0 fs/buffer.c:2226
> exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434
> exfat_extend_valid_size fs/exfat/file.c:553 [inline]
> exfat_file_write_iter+0x474/0xfb0 fs/exfat/file.c:588
> new_sync_write fs/read_write.c:590 [inline]
> vfs_write+0xb28/0x1540 fs/read_write.c:683
> ksys_write+0x24f/0x4c0 fs/read_write.c:736
> __do_sys_write fs/read_write.c:748 [inline]
> __se_sys_write fs/read_write.c:745 [inline]
> __x64_sys_write+0x93/0xe0 fs/read_write.c:745
> x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> CPU: 1 UID: 0 PID: 7910 Comm: syz.2.975 Not tainted 6.11.0-syzkaller-11728-gad46e8f95e93 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> =====================================================
>
>
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
>
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
>
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.
>
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
>
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
>
> If you want to undo deduplication, reply with:
> #syz undup
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2)
2024-10-02 7:26 [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2) syzbot
2024-10-02 7:56 ` Roberto Sassu
@ 2024-10-13 19:06 ` syzbot
2024-12-12 9:04 ` Yuezhang.Mo
1 sibling, 1 reply; 5+ messages in thread
From: syzbot @ 2024-10-13 19:06 UTC (permalink / raw)
To: dmitry.kasatkin, eric.snowberg, jmorris, linux-integrity,
linux-kernel, linux-security-module, paul, roberto.sassu,
roberto.sassu, serge, syzkaller-bugs, willy, yuezhang.mo, zohar
syzbot has found a reproducer for the following issue on:
HEAD commit: 36c254515dc6 Merge tag 'powerpc-6.12-4' of git://git.kerne..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ba885f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=981fe2ff8a1e457a
dashboard link: https://syzkaller.appspot.com/bug?extid=91ae49e1c1a2634d20c0
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10eb8727980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=157e5087980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ea807517ae2f/disk-36c25451.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5f30861c9c3c/vmlinux-36c25451.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8b5ef63bff6f/bzImage-36c25451.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/5402f23c14ef/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+91ae49e1c1a2634d20c0@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
ima_store_template security/integrity/ima/ima_api.c:122 [inline]
ima_store_measurement+0x36b/0x8d0 security/integrity/ima/ima_api.c:383
process_measurement+0x2c11/0x3f30 security/integrity/ima/ima_main.c:380
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
<Zero or more stacks not recorded to save memory>
Uninit was stored to memory at:
sha256_transform lib/crypto/sha256.c:117 [inline]
sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
sha256_transform lib/crypto/sha256.c:117 [inline]
sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
BLEND_OP lib/crypto/sha256.c:61 [inline]
sha256_transform lib/crypto/sha256.c:91 [inline]
sha256_transform_blocks+0xf33/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
BLEND_OP lib/crypto/sha256.c:61 [inline]
sha256_transform lib/crypto/sha256.c:92 [inline]
sha256_transform_blocks+0xf7d/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
BLEND_OP lib/crypto/sha256.c:61 [inline]
sha256_transform lib/crypto/sha256.c:93 [inline]
sha256_transform_blocks+0xfb5/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
LOAD_OP lib/crypto/sha256.c:56 [inline]
sha256_transform lib/crypto/sha256.c:82 [inline]
sha256_transform_blocks+0x2c35/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
memcpy_to_iter lib/iov_iter.c:65 [inline]
iterate_kvec include/linux/iov_iter.h:86 [inline]
iterate_and_advance2 include/linux/iov_iter.h:306 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x124a/0x2b30 lib/iov_iter.c:185
copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362
copy_folio_to_iter include/linux/uio.h:189 [inline]
filemap_read+0xc13/0x1500 mm/filemap.c:2696
generic_file_read_iter+0x136/0xad0 mm/filemap.c:2833
__kernel_read+0x726/0xd30 fs/read_write.c:527
integrity_kernel_read+0x77/0x90 security/integrity/iint.c:28
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1731/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was created at:
__alloc_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4756
alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
alloc_pages_noprof mm/mempolicy.c:2345 [inline]
folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352
filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010
__filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952
block_write_begin+0x6e/0x2b0 fs/buffer.c:2226
exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434
exfat_extend_valid_size fs/exfat/file.c:553 [inline]
exfat_file_write_iter+0x474/0xfb0 fs/exfat/file.c:588
do_iter_readv_writev+0x88a/0xa30
vfs_writev+0x56a/0x14f0 fs/read_write.c:1064
do_pwritev fs/read_write.c:1165 [inline]
__do_sys_pwritev2 fs/read_write.c:1224 [inline]
__se_sys_pwritev2+0x280/0x470 fs/read_write.c:1215
__x64_sys_pwritev2+0x11f/0x1a0 fs/read_write.c:1215
x64_sys_call+0x2edb/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:329
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 0 UID: 0 PID: 5186 Comm: syz-executor173 Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2)
2024-10-13 19:06 ` syzbot
@ 2024-12-12 9:04 ` Yuezhang.Mo
2024-12-12 11:21 ` [syzbot] [lsm?] [integrity?] " syzbot
0 siblings, 1 reply; 5+ messages in thread
From: Yuezhang.Mo @ 2024-12-12 9:04 UTC (permalink / raw)
To: syzbot, dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com,
jmorris@namei.org, linux-integrity@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, paul@paul-moore.com,
roberto.sassu@huawei.com, roberto.sassu@huaweicloud.com,
serge@hallyn.com, syzkaller-bugs@googlegroups.com,
willy@infradead.org, zohar@linux.ibm.com
[-- Attachment #1: Type: text/plain, Size: 9 bytes --]
#syz test
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: v1-0001-exfat-zero-new-buffer.patch --]
[-- Type: text/x-patch; name="v1-0001-exfat-zero-new-buffer.patch", Size: 1196 bytes --]
From 51b0e3cfc5c0c4ac0000ff97d236d2434618f7fc Mon Sep 17 00:00:00 2001
From: Yuezhang Mo <Yuezhang.Mo@sony.com>
Date: Thu, 12 Dec 2024 16:29:23 +0800
Subject: [PATCH v1] exfat: zero new buffer
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
---
fs/exfat/file.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index a25d7eb789f4..d91437831835 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -545,6 +545,7 @@ static int exfat_extend_valid_size(struct file *file, loff_t new_valid_size)
while (pos < new_valid_size) {
u32 len;
struct folio *folio;
+ unsigned long off;
len = PAGE_SIZE - (pos & (PAGE_SIZE - 1));
if (pos + len > new_valid_size)
@@ -554,6 +555,9 @@ static int exfat_extend_valid_size(struct file *file, loff_t new_valid_size)
if (err)
goto out;
+ off = offset_in_folio(folio, pos);
+ folio_zero_new_buffers(folio, off, off + len);
+
err = ops->write_end(file, mapping, pos, len, len, folio, NULL);
if (err < 0)
goto out;
@@ -563,6 +567,8 @@ static int exfat_extend_valid_size(struct file *file, loff_t new_valid_size)
cond_resched();
}
+ return 0;
+
out:
return err;
}
--
2.43.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [syzbot] [lsm?] [integrity?] KMSAN: uninit-value in ima_add_template_entry (2)
2024-12-12 9:04 ` Yuezhang.Mo
@ 2024-12-12 11:21 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2024-12-12 11:21 UTC (permalink / raw)
To: dmitry.kasatkin, eric.snowberg, jmorris, linux-integrity,
linux-kernel, linux-security-module, paul, roberto.sassu,
roberto.sassu, serge, syzkaller-bugs, willy, yuezhang.mo, zohar
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+91ae49e1c1a2634d20c0@syzkaller.appspotmail.com
Tested-by: syzbot+91ae49e1c1a2634d20c0@syzkaller.appspotmail.com
Tested on:
commit: 231825b2 Revert "unicode: Don't special case ignorable..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11b56cdf980000
kernel config: https://syzkaller.appspot.com/x/.config?x=b2d5bd2f63a4859d
dashboard link: https://syzkaller.appspot.com/bug?extid=91ae49e1c1a2634d20c0
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=133e6cdf980000
Note: testing is done by a robot and is best-effort only.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-12-12 11:21 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-10-02 7:26 [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2) syzbot
2024-10-02 7:56 ` Roberto Sassu
2024-10-13 19:06 ` syzbot
2024-12-12 9:04 ` Yuezhang.Mo
2024-12-12 11:21 ` [syzbot] [lsm?] [integrity?] " syzbot
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