[moderation] [block?] BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof
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syzbot
May 26, 2024, 8:55:27 PMMay 26
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 5f16eb0549ab Merge tag 'char-misc-6.10-rc1' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1647c784980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7f4625418c9ed5c8
dashboard link: https://syzkaller.appspot.com/bug?extid=c44fe924a6d145fb9301
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
CC: [ax...@kernel.dk linux...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-5f16eb05.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/20ac83ea5f8c/vmlinux-5f16eb05.xz
kernel image: https://storage.googleapis.com/syzbot-assets/31519c4f23c8/bzImage-5f16eb05.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c44fe9...@syzkaller.appspotmail.com
bcachefs (loop1): snapshots_read... done
bcachefs (loop1): journal_replay... done
bcachefs (loop1): resume_logged_ops... done
bcachefs (loop1): going read-write
bcachefs (loop1): done starting filesystem
BUG: kernel NULL pointer dereference, address: 000000000000003b
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 255f6067 P4D 255f6067 PUD 269c7067 PMD 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 8074 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-11919-g5f16eb0549ab #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:___slab_alloc+0x27a/0x1870 mm/slub.c:3609
Code: 0b 49 83 7f 28 00 0f 85 de 07 00 00 4d 89 77 28 49 83 7c 24 10 00 0f 85 45 06 00 00 4d 8b 7c 24 18 4d 85 ff 0f 84 d2 06 00 00 <49> 8b 47 10 83 bd 68 ff ff ff ff 49 89 44 24 18 74 20 49 8b 07 48
RSP: 0018:ffffc90003f36f20 EFLAGS: 00010006
RAX: 0000000000000000 RBX: 0000000000000206 RCX: ffffffff816bbf0e
RDX: 0000000000000001 RSI: ffffffff81e19948 RDI: 0000000000000000
RBP: ffffc90003f37000 R08: 0000000000000000 R09: fffffbfff283fe50
R10: ffffffff941ff287 R11: 0000000000000001 R12: ffffe8ffad149e40
R13: ffff888025322dc0 R14: ffff888020924880 R15: 000000000000002b
FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ef9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000000003b CR3: 000000001dcd2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756
__slab_alloc_node mm/slub.c:3809 [inline]
slab_alloc_node mm/slub.c:3988 [inline]
kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4007
mempool_alloc_noprof+0x176/0x390 mm/mempool.c:402
bio_alloc_bioset+0x480/0x8b0 block/bio.c:554
bch2_writepage_io_alloc fs/bcachefs/fs-io-buffered.c:476 [inline]
__bch2_writepage+0x107e/0x2500 fs/bcachefs/fs-io-buffered.c:610
write_cache_pages+0xb0/0x130 mm/page-writeback.c:2591
bch2_writepages+0x11f/0x200 fs/bcachefs/fs-io-buffered.c:650
do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387
__filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430
file_write_and_wait_range+0xd0/0x140 mm/filemap.c:788
bch2_fsync+0xa1/0x2c0 fs/bcachefs/fs-io.c:197
vfs_fsync_range+0x141/0x230 fs/sync.c:188
generic_write_sync include/linux/fs.h:2794 [inline]
bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1128 [inline]
bch2_write_iter+0x756/0x3180 fs/bcachefs/fs-io-buffered.c:1136
do_iter_readv_writev+0x504/0x780 fs/read_write.c:741
vfs_writev+0x36f/0xde0 fs/read_write.c:971
do_pwritev+0x1b2/0x260 fs/read_write.c:1072
__do_compat_sys_pwritev2 fs/read_write.c:1218 [inline]
__se_compat_sys_pwritev2 fs/read_write.c:1210 [inline]
__ia32_compat_sys_pwritev2+0x121/0x1b0 fs/read_write.c:1210
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7307579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ef95ac EFLAGS: 00000292 ORIG_RAX: 000000000000017b
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200015c0
RDX: 0000000000000007 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
CR2: 000000000000003b
---[ end trace 0000000000000000 ]---
RIP: 0010:___slab_alloc+0x27a/0x1870 mm/slub.c:3609
Code: 0b 49 83 7f 28 00 0f 85 de 07 00 00 4d 89 77 28 49 83 7c 24 10 00 0f 85 45 06 00 00 4d 8b 7c 24 18 4d 85 ff 0f 84 d2 06 00 00 <49> 8b 47 10 83 bd 68 ff ff ff ff 49 89 44 24 18 74 20 49 8b 07 48
RSP: 0018:ffffc90003f36f20 EFLAGS: 00010006
RAX: 0000000000000000 RBX: 0000000000000206 RCX: ffffffff816bbf0e
RDX: 0000000000000001 RSI: ffffffff81e19948 RDI: 0000000000000000
RBP: ffffc90003f37000 R08: 0000000000000000 R09: fffffbfff283fe50
R10: ffffffff941ff287 R11: 0000000000000001 R12: ffffe8ffad149e40
R13: ffff888025322dc0 R14: ffff888020924880 R15: 000000000000002b
FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ef9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000000003b CR3: 000000001dcd2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 49 83 7f 28 00 cmpq $0x0,0x28(%r15)
5: 0f 85 de 07 00 00 jne 0x7e9
b: 4d 89 77 28 mov %r14,0x28(%r15)
f: 49 83 7c 24 10 00 cmpq $0x0,0x10(%r12)
15: 0f 85 45 06 00 00 jne 0x660
1b: 4d 8b 7c 24 18 mov 0x18(%r12),%r15
20: 4d 85 ff test %r15,%r15
23: 0f 84 d2 06 00 00 je 0x6fb
* 29: 49 8b 47 10 mov 0x10(%r15),%rax <-- trapping instruction
2d: 83 bd 68 ff ff ff ff cmpl $0xffffffff,-0x98(%rbp)
34: 49 89 44 24 18 mov %rax,0x18(%r12)
39: 74 20 je 0x5b
3b: 49 8b 07 mov (%r15),%rax
3e: 48 rex.W
---
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: 5f16eb0549ab Merge tag 'char-misc-6.10-rc1' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1647c784980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7f4625418c9ed5c8
dashboard link: https://syzkaller.appspot.com/bug?extid=c44fe924a6d145fb9301
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
CC: [ax...@kernel.dk linux...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-5f16eb05.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/20ac83ea5f8c/vmlinux-5f16eb05.xz
kernel image: https://storage.googleapis.com/syzbot-assets/31519c4f23c8/bzImage-5f16eb05.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c44fe9...@syzkaller.appspotmail.com
bcachefs (loop1): snapshots_read... done
bcachefs (loop1): journal_replay... done
bcachefs (loop1): resume_logged_ops... done
bcachefs (loop1): going read-write
bcachefs (loop1): done starting filesystem
BUG: kernel NULL pointer dereference, address: 000000000000003b
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 255f6067 P4D 255f6067 PUD 269c7067 PMD 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 8074 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-11919-g5f16eb0549ab #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:___slab_alloc+0x27a/0x1870 mm/slub.c:3609
Code: 0b 49 83 7f 28 00 0f 85 de 07 00 00 4d 89 77 28 49 83 7c 24 10 00 0f 85 45 06 00 00 4d 8b 7c 24 18 4d 85 ff 0f 84 d2 06 00 00 <49> 8b 47 10 83 bd 68 ff ff ff ff 49 89 44 24 18 74 20 49 8b 07 48
RSP: 0018:ffffc90003f36f20 EFLAGS: 00010006
RAX: 0000000000000000 RBX: 0000000000000206 RCX: ffffffff816bbf0e
RDX: 0000000000000001 RSI: ffffffff81e19948 RDI: 0000000000000000
RBP: ffffc90003f37000 R08: 0000000000000000 R09: fffffbfff283fe50
R10: ffffffff941ff287 R11: 0000000000000001 R12: ffffe8ffad149e40
R13: ffff888025322dc0 R14: ffff888020924880 R15: 000000000000002b
FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ef9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000000003b CR3: 000000001dcd2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756
__slab_alloc_node mm/slub.c:3809 [inline]
slab_alloc_node mm/slub.c:3988 [inline]
kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4007
mempool_alloc_noprof+0x176/0x390 mm/mempool.c:402
bio_alloc_bioset+0x480/0x8b0 block/bio.c:554
bch2_writepage_io_alloc fs/bcachefs/fs-io-buffered.c:476 [inline]
__bch2_writepage+0x107e/0x2500 fs/bcachefs/fs-io-buffered.c:610
write_cache_pages+0xb0/0x130 mm/page-writeback.c:2591
bch2_writepages+0x11f/0x200 fs/bcachefs/fs-io-buffered.c:650
do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387
__filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430
file_write_and_wait_range+0xd0/0x140 mm/filemap.c:788
bch2_fsync+0xa1/0x2c0 fs/bcachefs/fs-io.c:197
vfs_fsync_range+0x141/0x230 fs/sync.c:188
generic_write_sync include/linux/fs.h:2794 [inline]
bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1128 [inline]
bch2_write_iter+0x756/0x3180 fs/bcachefs/fs-io-buffered.c:1136
do_iter_readv_writev+0x504/0x780 fs/read_write.c:741
vfs_writev+0x36f/0xde0 fs/read_write.c:971
do_pwritev+0x1b2/0x260 fs/read_write.c:1072
__do_compat_sys_pwritev2 fs/read_write.c:1218 [inline]
__se_compat_sys_pwritev2 fs/read_write.c:1210 [inline]
__ia32_compat_sys_pwritev2+0x121/0x1b0 fs/read_write.c:1210
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7307579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ef95ac EFLAGS: 00000292 ORIG_RAX: 000000000000017b
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200015c0
RDX: 0000000000000007 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
CR2: 000000000000003b
---[ end trace 0000000000000000 ]---
RIP: 0010:___slab_alloc+0x27a/0x1870 mm/slub.c:3609
Code: 0b 49 83 7f 28 00 0f 85 de 07 00 00 4d 89 77 28 49 83 7c 24 10 00 0f 85 45 06 00 00 4d 8b 7c 24 18 4d 85 ff 0f 84 d2 06 00 00 <49> 8b 47 10 83 bd 68 ff ff ff ff 49 89 44 24 18 74 20 49 8b 07 48
RSP: 0018:ffffc90003f36f20 EFLAGS: 00010006
RAX: 0000000000000000 RBX: 0000000000000206 RCX: ffffffff816bbf0e
RDX: 0000000000000001 RSI: ffffffff81e19948 RDI: 0000000000000000
RBP: ffffc90003f37000 R08: 0000000000000000 R09: fffffbfff283fe50
R10: ffffffff941ff287 R11: 0000000000000001 R12: ffffe8ffad149e40
R13: ffff888025322dc0 R14: ffff888020924880 R15: 000000000000002b
FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5ef9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000000003b CR3: 000000001dcd2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 49 83 7f 28 00 cmpq $0x0,0x28(%r15)
5: 0f 85 de 07 00 00 jne 0x7e9
b: 4d 89 77 28 mov %r14,0x28(%r15)
f: 49 83 7c 24 10 00 cmpq $0x0,0x10(%r12)
15: 0f 85 45 06 00 00 jne 0x660
1b: 4d 8b 7c 24 18 mov 0x18(%r12),%r15
20: 4d 85 ff test %r15,%r15
23: 0f 84 d2 06 00 00 je 0x6fb
* 29: 49 8b 47 10 mov 0x10(%r15),%rax <-- trapping instruction
2d: 83 bd 68 ff ff ff ff cmpl $0xffffffff,-0x98(%rbp)
34: 49 89 44 24 18 mov %rax,0x18(%r12)
39: 74 20 je 0x5b
3b: 49 8b 07 mov (%r15),%rax
3e: 48 rex.W
---
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
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