BUG: kernel NULL pointer dereference, address: 0000000000000002
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8000000024f4c067 P4D 8000000024f4c067 PUD 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 5872 Comm: kworker/0:4 Not tainted 6.14.0-rc4-syzkaller-00169-g1e15510b71c9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: slub_flushwq flush_cpu_slab
RIP: 0010:PagePoisoned include/linux/page-flags.h:294 [inline]
RIP: 0010:page_to_nid include/linux/mm.h:1648 [inline]
RIP: 0010:folio_nid include/linux/mm.h:1654 [inline]
RIP: 0010:slab_nid mm/slab.h:201 [inline]
RIP: 0010:deactivate_slab+0x1f/0x370 mm/slub.c:3039
Code: 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 48 49 89 f7 65 48 8b 04 25 28 00 00 00 48 89 44 24 40 <48> 8b 06 48 83 f8 ff 0f 84 12 03 00 00 49 89 fd 48 c1 e8 3a 48 8b
RSP: 0018:ffffc9000421fa38 EFLAGS: 00010292
RAX: 99b20565c45f1100 RBX: 0000000000000202 RCX: ffffffff819d2aaa
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888032fedb40
RBP: 0000000000000000 R08: ffffffff94513877 R09: 1ffffffff28a270e
R10: dffffc0000000000 R11: fffffbfff28a270f R12: 0000607f47666250
R13: ffff88805d595a00 R14: ffff8880b8600000 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000002 CR3: 000000006166a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
flush_slab mm/slub.c:3259 [inline]
flush_cpu_slab+0x195/0x450 mm/slub.c:3305
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
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: 0000000000000002
---[ end trace 0000000000000000 ]---
RIP: 0010:PagePoisoned include/linux/page-flags.h:294 [inline]
RIP: 0010:page_to_nid include/linux/mm.h:1648 [inline]
RIP: 0010:folio_nid include/linux/mm.h:1654 [inline]
RIP: 0010:slab_nid mm/slab.h:201 [inline]
RIP: 0010:deactivate_slab+0x1f/0x370 mm/slub.c:3039
Code: 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 48 49 89 f7 65 48 8b 04 25 28 00 00 00 48 89 44 24 40 <48> 8b 06 48 83 f8 ff 0f 84 12 03 00 00 49 89 fd 48 c1 e8 3a 48 8b
RSP: 0018:ffffc9000421fa38 EFLAGS: 00010292
RAX: 99b20565c45f1100 RBX: 0000000000000202 RCX: ffffffff819d2aaa
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888032fedb40
RBP: 0000000000000000 R08: ffffffff94513877 R09: 1ffffffff28a270e
R10: dffffc0000000000 R11: fffffbfff28a270f R12: 0000607f47666250
R13: ffff88805d595a00 R14: ffff8880b8600000 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000002 CR3: 000000006166a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 55 push %rbp
c: 41 57 push %r15
e: 41 56 push %r14
10: 41 55 push %r13
12: 41 54 push %r12
14: 53 push %rbx
15: 48 83 ec 48 sub $0x48,%rsp
19: 49 89 f7 mov %rsi,%r15
1c: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
23: 00 00
25: 48 89 44 24 40 mov %rax,0x40(%rsp)
* 2a: 48 8b 06 mov (%rsi),%rax <-- trapping instruction
2d: 48 83 f8 ff cmp $0xffffffffffffffff,%rax
31: 0f 84 12 03 00 00 je 0x349
37: 49 89 fd mov %rdi,%r13
3a: 48 c1 e8 3a shr $0x3a,%rax
3e: 48 rex.W
3f: 8b .byte 0x8b