From: syzbot <syzbot+3304ecaea706d3a6524c@syzkaller.appspotmail.com>
To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_trans_start_alloc_update_noupdate
Date: Thu, 02 Jan 2025 17:56:30 -0800 [thread overview]
Message-ID: <677743ce.050a0220.178762.0036.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 4099a71718b0 Merge tag 'sched-urgent-2024-12-29' of git://..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=103e70b0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f9048090d7bb0d06
dashboard link: https://syzkaller.appspot.com/bug?extid=3304ecaea706d3a6524c
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/62835b60de83/disk-4099a717.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9262b999e6be/vmlinux-4099a717.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3fc8cec4d596/bzImage-4099a717.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3304ecaea706d3a6524c@syzkaller.appspotmail.com
bcachefs (loop3): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names
bcachefs (loop3): initializing new filesystem
bcachefs (loop3): going read-write
bcachefs (loop3): marking superblocks
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:447 [inline]
BUG: KMSAN: uninit-value in bch2_trans_start_alloc_update_noupdate+0x61b/0x12f0 fs/bcachefs/alloc_background.c:472
bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:447 [inline]
bch2_trans_start_alloc_update_noupdate+0x61b/0x12f0 fs/bcachefs/alloc_background.c:472
__bch2_trans_mark_metadata_bucket fs/bcachefs/buckets.c:958 [inline]
bch2_trans_mark_metadata_bucket+0x2e6/0x2430 fs/bcachefs/buckets.c:1048
__bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1120 [inline]
bch2_trans_mark_dev_sb+0xcf7/0x10e0 fs/bcachefs/buckets.c:1133
bch2_trans_mark_dev_sbs_flags+0x3e5/0x9f0 fs/bcachefs/buckets.c:1143
bch2_trans_mark_dev_sbs+0x32/0x40 fs/bcachefs/buckets.c:1155
bch2_fs_initialize+0x19bd/0x35d0 fs/bcachefs/recovery.c:1074
bch2_fs_start+0x77d/0xbd0 fs/bcachefs/super.c:1038
bch2_fs_get_tree+0x13ea/0x22d0 fs/bcachefs/fs.c:2170
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3507
path_mount+0x742/0x1f10 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x722/0x810 fs/namespace.c:4034
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4034
x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
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_u64s_small fs/bcachefs/util.h:393 [inline]
bkey_reassemble fs/bcachefs/bkey.h:513 [inline]
btree_key_cache_create fs/bcachefs/btree_key_cache.c:259 [inline]
btree_key_cache_fill+0x13da/0x3d60 fs/bcachefs/btree_key_cache.c:309
bch2_btree_path_traverse_cached+0x988/0xe20 fs/bcachefs/btree_key_cache.c:361
bch2_btree_path_traverse_one+0x749/0x47b0 fs/bcachefs/btree_iter.c:1159
bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
bch2_btree_iter_peek_slot+0x10b7/0x3950 fs/bcachefs/btree_iter.c:2629
__bch2_bkey_get_iter fs/bcachefs/btree_iter.h:575 [inline]
bch2_bkey_get_iter fs/bcachefs/btree_iter.h:589 [inline]
bch2_trans_start_alloc_update_noupdate+0x390/0x12f0 fs/bcachefs/alloc_background.c:464
__bch2_trans_mark_metadata_bucket fs/bcachefs/buckets.c:958 [inline]
bch2_trans_mark_metadata_bucket+0x2e6/0x2430 fs/bcachefs/buckets.c:1048
__bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1120 [inline]
bch2_trans_mark_dev_sb+0xcf7/0x10e0 fs/bcachefs/buckets.c:1133
bch2_trans_mark_dev_sbs_flags+0x3e5/0x9f0 fs/bcachefs/buckets.c:1143
bch2_trans_mark_dev_sbs+0x32/0x40 fs/bcachefs/buckets.c:1155
bch2_fs_initialize+0x19bd/0x35d0 fs/bcachefs/recovery.c:1074
bch2_fs_start+0x77d/0xbd0 fs/bcachefs/super.c:1038
bch2_fs_get_tree+0x13ea/0x22d0 fs/bcachefs/fs.c:2170
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3507
path_mount+0x742/0x1f10 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x722/0x810 fs/namespace.c:4034
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4034
x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
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:
___kmalloc_large_node+0x22c/0x370 mm/slub.c:4253
__kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4270
__do_kmalloc_node mm/slub.c:4286 [inline]
__kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4304
__kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:650
btree_node_data_alloc fs/bcachefs/btree_cache.c:153 [inline]
__bch2_btree_node_mem_alloc+0x2be/0xa80 fs/bcachefs/btree_cache.c:198
bch2_fs_btree_cache_init+0x4e4/0xb50 fs/bcachefs/btree_cache.c:653
bch2_fs_alloc fs/bcachefs/super.c:917 [inline]
bch2_fs_open+0x4d3a/0x5b40 fs/bcachefs/super.c:2065
bch2_fs_get_tree+0x983/0x22d0 fs/bcachefs/fs.c:2157
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3507
path_mount+0x742/0x1f10 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x722/0x810 fs/namespace.c:4034
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4034
x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
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: 10842 Comm: syz.3.1345 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================
---
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next reply other threads:[~2025-01-03 1:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-03 1:56 syzbot [this message]
2025-04-01 3:58 ` [syzbot] syzbot
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