[syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    abf2050f51fd Merge tag 'media/v6.12-1' of git://git.kernel..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1603b107980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bc30a30374b0753
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
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=1507aa27980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12d2c99f980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-abf2050f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2179ebeade58/vmlinux-abf2050f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f05289b5cf7c/bzImage-abf2050f.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/fd7a8b92de34/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: use-after-free in ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline]
BUG: KASAN: use-after-free in __ocfs2_flush_truncate_log+0x824/0x1250 fs/ocfs2/alloc.c:6054
Read of size 4 at addr ffff888045e6fac0 by task kworker/u4:3/41

CPU: 0 UID: 0 PID: 41 Comm: kworker/u4:3 Not tainted 6.11.0-syzkaller-09959-gabf2050f51fd #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: ocfs2_wq ocfs2_truncate_log_worker
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline]
 __ocfs2_flush_truncate_log+0x824/0x1250 fs/ocfs2/alloc.c:6054
 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6076 [inline]
 ocfs2_truncate_log_worker+0xa2/0x1b0 fs/ocfs2/alloc.c:6089
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x4d pfn:0x45e6f
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 ffffea0001179b88 ffffea0001179c08 0000000000000000
raw: 000000000000004d 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5109, tgid 5109 (syz-executor412), ts 88738057363, free_ts 88913146991
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2283
 shmem_alloc_folio mm/shmem.c:1774 [inline]
 shmem_alloc_and_add_folio+0x49b/0x13d0 mm/shmem.c:1813
 shmem_get_folio_gfp+0x5a9/0x20a0 mm/shmem.c:2335
 shmem_get_folio mm/shmem.c:2441 [inline]
 shmem_write_begin+0x17e/0x460 mm/shmem.c:3046
 generic_perform_write+0x344/0x6d0 mm/filemap.c:4050
 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3221
 new_sync_write fs/read_write.c:590 [inline]
 vfs_write+0xa6d/0xc90 fs/read_write.c:683
 ksys_write+0x183/0x2b0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5109 tgid 5109 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_folios+0xf12/0x18d0 mm/page_alloc.c:2686
 folios_put_refs+0x76c/0x860 mm/swap.c:1007
 folio_batch_release include/linux/pagevec.h:101 [inline]
 shmem_undo_range+0x64c/0x1cf0 mm/shmem.c:1032
 shmem_truncate_range mm/shmem.c:1144 [inline]
 shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1272
 evict+0x4e8/0x9b0 fs/inode.c:723
 __dentry_kill+0x20d/0x630 fs/dcache.c:615
 dput+0x19f/0x2b0 fs/dcache.c:857
 __fput+0x5d2/0x880 fs/file_table.c:439
 __do_sys_close fs/open.c:1565 [inline]
 __se_sys_close fs/open.c:1550 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1550
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888045e6f980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888045e6fa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888045e6fa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                           ^
 ffff888045e6fb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888045e6fb80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================


---
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:
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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:
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(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

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         3efc5736 Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12edfe27980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7782ef71990b6dba
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12fb4d9f980000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         211ddde0 Linux 6.18-rc2
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=12e6f52f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7c601ba0b0d071c6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=177d8de2580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         211ddde0 Linux 6.18-rc2
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=153c9492580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7c601ba0b0d071c6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15059734580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         552c5071 Merge tag 'vfio-v6.18-rc3' of https://github...
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=122cce7c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7c601ba0b0d071c6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=14b8e3e2580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         552c5071 Merge tag 'vfio-v6.18-rc3' of https://github...
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1322f492580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7c601ba0b0d071c6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=13103734580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
UBSAN: signed-integer-overflow in ip_idents_reserve

================================================================================
UBSAN: signed-integer-overflow in ./arch/x86/include/asm/atomic.h:165:11
895131917 + 1491632920 cannot be represented in type 'int'
CPU: 0 PID: 127 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
Call Trace:
 <IRQ>
 dump_stack+0xfd/0x16e lib/dump_stack.c:118
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:148
 handle_overflow+0x192/0x1b0 lib/ubsan.c:180
 arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
 atomic_add_return include/asm-generic/atomic-instrumented.h:73 [inline]
 ip_idents_reserve+0x14a/0x170 net/ipv4/route.c:521
 __ip_select_ident+0xe4/0x1c0 net/ipv4/route.c:538
 ip_select_ident_segs include/net/ip.h:525 [inline]
 ip_select_ident include/net/ip.h:532 [inline]
 __ip_make_skb+0xf78/0x19b0 net/ipv4/ip_output.c:1551
 ip_finish_skb include/net/ip.h:244 [inline]
 ip_push_pending_frames+0x2c/0x150 net/ipv4/ip_output.c:1606
 __icmp_send+0xc22/0xf70 net/ipv4/icmp.c:776
 icmp_send include/net/icmp.h:43 [inline]
 __udp4_lib_rcv+0x14e9/0x2070 net/ipv4/udp.c:2438
 ip_protocol_deliver_rcu+0x405/0x7e0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1d5/0x330 net/ipv4/ip_input.c:231
 NF_HOOK+0x258/0x2c0 include/linux/netfilter.h:296
 NF_HOOK+0x258/0x2c0 include/linux/netfilter.h:296
 __netif_receive_skb_one_core net/core/dev.c:5395 [inline]
 __netif_receive_skb+0x144/0x380 net/core/dev.c:5509
 process_backlog+0x4ef/0x6e0 net/core/dev.c:6416
 napi_poll net/core/dev.c:6867 [inline]
 net_rx_action+0x4b1/0xc30 net/core/dev.c:6937
 __do_softirq+0x267/0x92e kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x9b/0xe0 arch/x86/kernel/irq_64.c:77
 do_softirq+0xc4/0x100 kernel/softirq.c:343
 __local_bh_enable_ip+0x121/0x160 kernel/softirq.c:195
 wg_socket_send_skb_to_peer+0x167/0x1c0 drivers/net/wireguard/socket.c:184
 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline]
 wg_packet_handshake_send_worker+0x16b/0x280 drivers/net/wireguard/send.c:51
 process_one_work+0x85b/0xfe0 kernel/workqueue.c:2282
 worker_thread+0xa9b/0x1430 kernel/workqueue.c:2428
 kthread+0x384/0x410 kernel/kthread.c:328
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
================================================================================


Tested on:

commit:         d3d0b4e2 Linux 5.10.245
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14627734580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bf23b541eb2e03cb
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=11ba8c92580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         8e6e2188 Linux 6.1.157
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12259be2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6e2d28458335b118
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=104eae7c580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         4fc43deb Linux 6.12.55
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.12.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16b98258580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fefde68860cfc8b6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12ad6d42580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

failed to checkout kernel repo https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/linux-5.10.y: failed to run ["git" "fetch" "--force" "4d52a57a3858a6eee0d0b25cc3a0c9533f747d8f" "linux-5.10.y"]: exit status 128


Tested on:

commit:         [unknown 
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-5.10.y
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15b46932580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

failed to checkout kernel repo https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/linux-6.1.y: failed to run ["git" "fetch" "--force" "4d52a57a3858a6eee0d0b25cc3a0c9533f747d8f" "linux-6.1.y"]: exit status 128


Tested on:

commit:         [unknown 
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-6.1.y
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12f157e2580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

failed to checkout kernel repo https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/linux-6.12.y: failed to run ["git" "fetch" "--force" "4d52a57a3858a6eee0d0b25cc3a0c9533f747d8f" "linux-6.12.y"]: exit status 128


Tested on:

commit:         [unknown 
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-6.12.y
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15a2dd42580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

fs/ocfs2/ocfs2_fs.h:474:40: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:489:40: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:502:43: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:646:26: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:659:16: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:807:37: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:943:43: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:1030:39: error: expected ';' at end of declaration list


Tested on:

commit:         d3d0b4e2 Linux 5.10.245
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=13984704580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

fs/ocfs2/ocfs2_fs.h:472:40: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:487:40: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:500:43: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:644:26: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:657:16: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:805:37: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:941:43: error: expected ';' at end of declaration list
fs/ocfs2/ocfs2_fs.h:1028:39: error: expected ';' at end of declaration list


Tested on:

commit:         8e6e2188 Linux 6.1.157
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.1.y
kernel config:  https://syzkaller.appspot.com/x/.config?x=7a3fccdd0bb995
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=143d5e7c580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         4fc43deb Linux 6.12.55
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.12.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1574f614580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fefde68860cfc8b6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12db57e2580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
UBSAN: signed-integer-overflow in ip_idents_reserve

IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
================================================================================
UBSAN: signed-integer-overflow in ./arch/x86/include/asm/atomic.h:165:11
360654889 + 1871359415 cannot be represented in type 'int'
CPU: 1 PID: 128 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
Call Trace:
 dump_stack+0xfd/0x16e lib/dump_stack.c:118
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:148
 handle_overflow+0x192/0x1b0 lib/ubsan.c:180
 arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
 atomic_add_return include/asm-generic/atomic-instrumented.h:73 [inline]
 ip_idents_reserve+0x14a/0x170 net/ipv4/route.c:521
 __ip_select_ident+0xe4/0x1c0 net/ipv4/route.c:538
 iptunnel_xmit+0x465/0x840 net/ipv4/ip_tunnel_core.c:80
 udp_tunnel_xmit_skb+0x1b7/0x280 net/ipv4/udp_tunnel_core.c:190
 send4+0x5d4/0xaf0 drivers/net/wireguard/socket.c:85
 wg_socket_send_skb_to_peer+0xcd/0x1c0 drivers/net/wireguard/socket.c:175
 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline]
 wg_packet_handshake_send_worker+0x16b/0x280 drivers/net/wireguard/send.c:51
 process_one_work+0x85b/0xfe0 kernel/workqueue.c:2282
 worker_thread+0xa9b/0x1430 kernel/workqueue.c:2428
 kthread+0x384/0x410 kernel/kthread.c:328
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
================================================================================
Kernel panic - not syncing: UBSAN: panic_on_warn set ...
CPU: 1 PID: 128 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
Call Trace:
 dump_stack+0xfd/0x16e lib/dump_stack.c:118
 panic+0x2f0/0x9c0 kernel/panic.c:308
 check_panic_on_warn+0x95/0xe0 kernel/panic.c:228
 handle_overflow+0x192/0x1b0 lib/ubsan.c:180
 arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
 atomic_add_return include/asm-generic/atomic-instrumented.h:73 [inline]
 ip_idents_reserve+0x14a/0x170 net/ipv4/route.c:521
 __ip_select_ident+0xe4/0x1c0 net/ipv4/route.c:538
 iptunnel_xmit+0x465/0x840 net/ipv4/ip_tunnel_core.c:80
 udp_tunnel_xmit_skb+0x1b7/0x280 net/ipv4/udp_tunnel_core.c:190
 send4+0x5d4/0xaf0 drivers/net/wireguard/socket.c:85
 wg_socket_send_skb_to_peer+0xcd/0x1c0 drivers/net/wireguard/socket.c:175
 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline]
 wg_packet_handshake_send_worker+0x16b/0x280 drivers/net/wireguard/send.c:51
 process_one_work+0x85b/0xfe0 kernel/workqueue.c:2282
 worker_thread+0xa9b/0x1430 kernel/workqueue.c:2428
 kthread+0x384/0x410 kernel/kthread.c:328
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Kernel Offset: disabled
Rebooting in 86400 seconds..


Tested on:

commit:         d3d0b4e2 Linux 5.10.245
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10759f34580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bf23b541eb2e03cb
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12983e7c580000

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         8e6e2188 Linux 6.1.157
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15483fe2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6e2d28458335b118
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1314bd42580000

Note: testing is done by a robot and is best-effort only.

Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com
Tested-by: syzbot+4d55dad3a9e8e9f7d2b5@syzkaller.appspotmail.com

Tested on:

commit:         4408a3d6 Linux 6.12.56
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.12.y
console output: https://syzkaller.appspot.com/x/log.txt?x=117e3e7c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fefde68860cfc8b6
dashboard link: https://syzkaller.appspot.com/bug?extid=4d55dad3a9e8e9f7d2b5
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=156bf614580000

Note: testing is done by a robot and is best-effort only.