BUG: unable to handle page fault for address: ffffe8fffebeb038
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 1b03f067 P4D 1b03f067 PUD 1ea6a067 PMD 43c42067 PTE 0
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 79 Comm: kswapd0 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:bch2_btree_cache_scan+0xb57/0xec0 fs/bcachefs/btree_cache.c:563
Code: 24 38 0f 85 12 02 00 00 44 21 2a 48 81 c3 48 b6 04 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 ac 05 e2 fd 48 8b 03 <65> 48 ff 40 38 41 80 3c 2e 00 74 08 4c 89 ff e8 95 05 e2 fd 49 8b
RSP: 0018:ffffc9000104f2c0 EFLAGS: 00010246
RAX: 0000607fdefeb000 RBX: ffff8880580cb648 RCX: ffffffff8c09b8c7
RDX: ffff88801f58002c RSI: 0000000000000008 RDI: ffffc9000104f240
RBP: dffffc0000000000 R08: ffffc9000104f247 R09: 1ffff92000209e48
R10: dffffc0000000000 R11: fffff52000209e49 R12: 0000000000000003
R13: 00000000fffbffff R14: 1ffff92000209eb5 R15: ffffc9000104f5a8
FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8fffebeb038 CR3: 0000000042b3e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_shrink_slab+0x72d/0x1160 mm/shrinker.c:437
shrink_slab+0x1093/0x14d0 mm/shrinker.c:664
shrink_one+0x43b/0x850 mm/vmscan.c:4868
shrink_many mm/vmscan.c:4929 [inline]
lru_gen_shrink_node mm/vmscan.c:5007 [inline]
shrink_node+0x379b/0x3e20 mm/vmscan.c:5978
kswapd_shrink_node mm/vmscan.c:6807 [inline]
balance_pgdat mm/vmscan.c:6999 [inline]
kswapd+0x20f3/0x3b10 mm/vmscan.c:7264
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Modules linked in:
CR2: ffffe8fffebeb038
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_btree_cache_scan+0xb57/0xec0 fs/bcachefs/btree_cache.c:563
Code: 24 38 0f 85 12 02 00 00 44 21 2a 48 81 c3 48 b6 04 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 ac 05 e2 fd 48 8b 03 <65> 48 ff 40 38 41 80 3c 2e 00 74 08 4c 89 ff e8 95 05 e2 fd 49 8b
RSP: 0018:ffffc9000104f2c0 EFLAGS: 00010246
RAX: 0000607fdefeb000 RBX: ffff8880580cb648 RCX: ffffffff8c09b8c7
RDX: ffff88801f58002c RSI: 0000000000000008 RDI: ffffc9000104f240
RBP: dffffc0000000000 R08: ffffc9000104f247 R09: 1ffff92000209e48
R10: dffffc0000000000 R11: fffff52000209e49 R12: 0000000000000003
R13: 00000000fffbffff R14: 1ffff92000209eb5 R15: ffffc9000104f5a8
FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8fffebeb038 CR3: 0000000042b3e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 24 38 and $0x38,%al
2: 0f 85 12 02 00 00 jne 0x21a
8: 44 21 2a and %r13d,(%rdx)
b: 48 81 c3 48 b6 04 00 add $0x4b648,%rbx
12: 48 89 d8 mov %rbx,%rax
15: 48 c1 e8 03 shr $0x3,%rax
19: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
1d: 74 08 je 0x27
1f: 48 89 df mov %rbx,%rdi
22: e8 ac 05 e2 fd call 0xfde205d3
27: 48 8b 03 mov (%rbx),%rax
* 2a: 65 48 ff 40 38 incq %gs:0x38(%rax) <-- trapping instruction
2f: 41 80 3c 2e 00 cmpb $0x0,(%r14,%rbp,1)
34: 74 08 je 0x3e
36: 4c 89 ff mov %r15,%rdi
39: e8 95 05 e2 fd call 0xfde205d3
3e: 49 rex.WB
3f: 8b .byte 0x8b