[syzbot] [bcachefs?] KMSAN: uninit-value in bch2_dev_freespace_init
6 views
Skip to first unread message
syzbot
Dec 4, 2024, 12:36:28 PM12/4/24
to kent.ov...@linux.dev, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 2ba9f676d0a2 Merge tag 'drm-next-2024-11-29' of https://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=127f3bc0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=b131ba4658863ffa
dashboard link: https://syzkaller.appspot.com/bug?extid=aa2232cb0e5de0c0b56f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/43bff3f0073a/disk-2ba9f676.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0683b9881a99/vmlinux-2ba9f676.xz
kernel image: https://storage.googleapis.com/syzbot-assets/37c30742afb0/bzImage-2ba9f676.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa2232...@syzkaller.appspotmail.com
bcachefs (loop4): marking superblocks
bcachefs (loop4): initializing freespace
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
BUG: KMSAN: uninit-value in bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_fs_freespace_init+0x599/0xb30 fs/bcachefs/alloc_background.c:2304
bch2_fs_initialize+0x2140/0x35d0 fs/bcachefs/recovery.c:1082
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
__ia32_sys_mount+0xe3/0x150 fs/namespace.c:4034
ia32_sys_call+0x260e/0x4180 arch/x86/include/generated/asm/syscalls_32.h:22
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Uninit was created at:
___kmalloc_large_node+0x22c/0x370 mm/slub.c:4238
__kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4255
__do_kmalloc_node mm/slub.c:4271 [inline]
__kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4289
__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
__ia32_sys_mount+0xe3/0x150 fs/namespace.c:4034
ia32_sys_call+0x260e/0x4180 arch/x86/include/generated/asm/syscalls_32.h:22
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
CPU: 0 UID: 0 PID: 6020 Comm: syz.4.18 Not tainted 6.12.0-syzkaller-11677-g2ba9f676d0a2 #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 syzk...@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 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
syzbot found the following issue on:
HEAD commit: 2ba9f676d0a2 Merge tag 'drm-next-2024-11-29' of https://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=127f3bc0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=b131ba4658863ffa
dashboard link: https://syzkaller.appspot.com/bug?extid=aa2232cb0e5de0c0b56f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/43bff3f0073a/disk-2ba9f676.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0683b9881a99/vmlinux-2ba9f676.xz
kernel image: https://storage.googleapis.com/syzbot-assets/37c30742afb0/bzImage-2ba9f676.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa2232...@syzkaller.appspotmail.com
bcachefs (loop4): marking superblocks
bcachefs (loop4): initializing freespace
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
BUG: KMSAN: uninit-value in bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_fs_freespace_init+0x599/0xb30 fs/bcachefs/alloc_background.c:2304
bch2_fs_initialize+0x2140/0x35d0 fs/bcachefs/recovery.c:1082
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
__ia32_sys_mount+0xe3/0x150 fs/namespace.c:4034
ia32_sys_call+0x260e/0x4180 arch/x86/include/generated/asm/syscalls_32.h:22
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Uninit was created at:
___kmalloc_large_node+0x22c/0x370 mm/slub.c:4238
__kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4255
__do_kmalloc_node mm/slub.c:4271 [inline]
__kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4289
__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
__ia32_sys_mount+0xe3/0x150 fs/namespace.c:4034
ia32_sys_call+0x260e/0x4180 arch/x86/include/generated/asm/syscalls_32.h:22
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
CPU: 0 UID: 0 PID: 6020 Comm: syz.4.18 Not tainted 6.12.0-syzkaller-11677-g2ba9f676d0a2 #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 syzk...@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 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
syzbot
Dec 17, 2024, 6:00:23 AM12/17/24
to kent.ov...@linux.dev, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: f44d154d6e3d Merge tag 'soc-fixes-6.13' of git://git.kerne..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13c0a7e8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=caeefc00e8b4dc9f
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/009edf262d35/disk-f44d154d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9929be9055fe/vmlinux-f44d154d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/24e56358f05d/bzImage-f44d154d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/18b4c753db11/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa2232...@syzkaller.appspotmail.com
bcachefs (loop1): going read-write
bcachefs (loop1): marking superblocks
bcachefs (loop1): initializing freespace
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
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: 1 UID: 0 PID: 6157 Comm: syz.1.21 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
=====================================================
---
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.
HEAD commit: f44d154d6e3d Merge tag 'soc-fixes-6.13' of git://git.kerne..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13c0a7e8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=caeefc00e8b4dc9f
dashboard link: https://syzkaller.appspot.com/bug?extid=aa2232cb0e5de0c0b56f
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=10dc74f8580000
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/009edf262d35/disk-f44d154d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9929be9055fe/vmlinux-f44d154d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/24e56358f05d/bzImage-f44d154d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/18b4c753db11/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa2232...@syzkaller.appspotmail.com
bcachefs (loop1): marking superblocks
bcachefs (loop1): initializing freespace
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
BUG: KMSAN: uninit-value in bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_fs_freespace_init+0x599/0xb30 fs/bcachefs/alloc_background.c:2304
bch2_fs_initialize+0x2140/0x35d0 fs/bcachefs/recovery.c:1082
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
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
BUG: KMSAN: uninit-value in bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:235 [inline]
bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2232
bch2_fs_freespace_init+0x599/0xb30 fs/bcachefs/alloc_background.c:2304
bch2_fs_initialize+0x2140/0x35d0 fs/bcachefs/recovery.c:1082
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_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
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_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: 1 UID: 0 PID: 6157 Comm: syz.1.21 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
=====================================================
---
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.
syzbot
Feb 3, 2025, 3:29:31 PM2/3/25
to kent.ov...@linux.dev, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 2014c95afece Linux 6.14-rc1
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15526eb0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa4f01a8a3baec54
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b1c3df980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5f7690b1fcba/disk-2014c95a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cf88797ccf0a/vmlinux-2014c95a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c40073027cde/bzImage-2014c95a.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/243156c15973/mount_2.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa2232...@syzkaller.appspotmail.com
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names
bcachefs (loop0): initializing new filesystem
bcachefs (loop0): going read-write
bcachefs (loop0): marking superblocks
bcachefs (loop0): initializing freespace
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:233 [inline]
BUG: KMSAN: uninit-value in bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2254
bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:233 [inline]
bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2254
bch2_fs_freespace_init+0x599/0xb30 fs/bcachefs/alloc_background.c:2326
bch2_fs_initialize+0x1a74/0x2f90 fs/bcachefs/recovery.c:1154
bch2_fs_start+0x792/0xc20 fs/bcachefs/super.c:1031
bch2_fs_get_tree+0x143a/0x2330 fs/bcachefs/fs.c:2203
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
path_mount+0x742/0x1f10 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x71f/0x800 fs/namespace.c:4088
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
___kmalloc_large_node+0x22c/0x370 mm/slub.c:4249
__kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4266
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4300
__kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:662
btree_node_data_alloc fs/bcachefs/btree_cache.c:156 [inline]
__bch2_btree_node_mem_alloc+0x2be/0xa80 fs/bcachefs/btree_cache.c:201
bch2_fs_btree_cache_init+0x4f0/0xb60 fs/bcachefs/btree_cache.c:655
bch2_fs_alloc fs/bcachefs/super.c:908 [inline]
bch2_fs_open+0x4b24/0x59c0 fs/bcachefs/super.c:2053
bch2_fs_get_tree+0x986/0x2330 fs/bcachefs/fs.c:2190
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
path_mount+0x742/0x1f10 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x71f/0x800 fs/namespace.c:4088
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
HEAD commit: 2014c95afece Linux 6.14-rc1
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15526eb0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa4f01a8a3baec54
dashboard link: https://syzkaller.appspot.com/bug?extid=aa2232cb0e5de0c0b56f
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=1071d724580000
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b1c3df980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5f7690b1fcba/disk-2014c95a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cf88797ccf0a/vmlinux-2014c95a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c40073027cde/bzImage-2014c95a.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/243156c15973/mount_2.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa2232...@syzkaller.appspotmail.com
bcachefs (loop0): initializing new filesystem
bcachefs (loop0): going read-write
bcachefs (loop0): marking superblocks
bcachefs (loop0): initializing freespace
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:233 [inline]
BUG: KMSAN: uninit-value in bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2254
bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:233 [inline]
bch2_dev_freespace_init+0x1044/0x1eb0 fs/bcachefs/alloc_background.c:2254
bch2_fs_freespace_init+0x599/0xb30 fs/bcachefs/alloc_background.c:2326
bch2_fs_initialize+0x1a74/0x2f90 fs/bcachefs/recovery.c:1154
bch2_fs_start+0x792/0xc20 fs/bcachefs/super.c:1031
bch2_fs_get_tree+0x143a/0x2330 fs/bcachefs/fs.c:2203
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
path_mount+0x742/0x1f10 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x71f/0x800 fs/namespace.c:4088
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
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:
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
___kmalloc_large_node+0x22c/0x370 mm/slub.c:4249
__kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4266
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4300
__kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:662
btree_node_data_alloc fs/bcachefs/btree_cache.c:156 [inline]
__bch2_btree_node_mem_alloc+0x2be/0xa80 fs/bcachefs/btree_cache.c:201
bch2_fs_btree_cache_init+0x4f0/0xb60 fs/bcachefs/btree_cache.c:655
bch2_fs_alloc fs/bcachefs/super.c:908 [inline]
bch2_fs_open+0x4b24/0x59c0 fs/bcachefs/super.c:2053
bch2_fs_get_tree+0x986/0x2330 fs/bcachefs/fs.c:2190
vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
path_mount+0x742/0x1f10 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x71f/0x800 fs/namespace.c:4088
__x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
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: 1 UID: 0 PID: 5778 Comm: syz-executor213 Not tainted 6.14.0-rc1-syzkaller #0
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
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
syzbot
Apr 1, 2025, 12:03:43 AM4/1/25
to linux-...@vger.kernel.org, syzkall...@googlegroups.com
For archival purposes, forwarding an incoming command email to
linux-...@vger.kernel.org, syzkall...@googlegroups.com.
***
Subject:
Author: kent.ov...@linux.dev
#syz fix bcachefs: Disable asm memcpys when kmsan enabled
linux-...@vger.kernel.org, syzkall...@googlegroups.com.
***
Subject:
Author: kent.ov...@linux.dev
#syz fix bcachefs: Disable asm memcpys when kmsan enabled
Reply all
Reply to author
Forward
0 new messages