BUG: unable to handle page fault for address: ffffe8ffac5f8070
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 1543f067 P4D 1543f067 PUD 19d9a067 PMD 617e1067 PTE 0
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 111 Comm: kswapd0 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:bch2_btree_cache_scan+0x492/0x1150 fs/bcachefs/btree_cache.c:463
Code: 48 89 fa 48 c1 ea 03 0d ff ff fb ff 21 43 2c 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 9c 0b 00 00 49 8b 86 f8 b6 04 00 <65> 48 ff 40 38 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 50 48 c1
RSP: 0018:ffffc90000e476b0 EFLAGS: 00010246
RAX: 0000607f804f8038 RBX: ffff88801a4ac880 RCX: 0000000000000000
RDX: 1ffff1100c3b96df RSI: ffffffff83e66797 RDI: ffff888061dcb6f8
RBP: ffff888061d81a48 R08: 0000000000000001 R09: fffff520001c8ebf
R10: ffffc90000e475ff R11: 0000000000000000 R12: ffff888061d81c70
R13: ffff888061d81a48 R14: ffff888061d80000 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff88802c100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8ffac5f8070 CR3: 000000001cd5e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
shrink_slab+0x18a/0x1310 mm/shrinker.c:662
shrink_one+0x493/0x7c0 mm/vmscan.c:4790
shrink_many mm/vmscan.c:4851 [inline]
lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951
shrink_node mm/vmscan.c:5910 [inline]
kswapd_shrink_node mm/vmscan.c:6720 [inline]
balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911
kswapd+0x5ea/0xbf0 mm/vmscan.c:7180
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Modules linked in:
CR2: ffffe8ffac5f8070
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_btree_cache_scan+0x492/0x1150 fs/bcachefs/btree_cache.c:463
Code: 48 89 fa 48 c1 ea 03 0d ff ff fb ff 21 43 2c 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 9c 0b 00 00 49 8b 86 f8 b6 04 00 <65> 48 ff 40 38 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 50 48 c1
RSP: 0018:ffffc90000e476b0 EFLAGS: 00010246
RAX: 0000607f804f8038 RBX: ffff88801a4ac880 RCX: 0000000000000000
RDX: 1ffff1100c3b96df RSI: ffffffff83e66797 RDI: ffff888061dcb6f8
RBP: ffff888061d81a48 R08: 0000000000000001 R09: fffff520001c8ebf
R10: ffffc90000e475ff R11: 0000000000000000 R12: ffff888061d81c70
R13: ffff888061d81a48 R14: ffff888061d80000 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff88802c100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8ffac5f8070 CR3: 000000001cd5e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 48 89 fa mov %rdi,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 0d ff ff fb ff or $0xfffbffff,%eax
c: 21 43 2c and %eax,0x2c(%rbx)
f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
16: fc ff df
19: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
1d: 0f 85 9c 0b 00 00 jne 0xbbf
23: 49 8b 86 f8 b6 04 00 mov 0x4b6f8(%r14),%rax
* 2a: 65 48 ff 40 38 incq %gs:0x38(%rax) <-- trapping instruction
2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
36: fc ff df
39: 48 8b 54 24 50 mov 0x50(%rsp),%rdx
3e: 48 rex.W
3f: c1 .byte 0xc1