slab dentry start ffff88805af3f028 pointer offset 296 size 312
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 8000000032063067 P4D 8000000032063067 PUD 0
Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 41 Comm: kworker/0:1H Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bcachefs_btree_read_complete btree_node_read_work
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90000007bd8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 1ffff1100b5e7e2b RCX: bebb8a17c3375d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88805af3f150
RBP: ffffc90000007e10 R08: ffffffff81a114cc R09: 1ffffffff28a2908
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffffff81a8d767
R13: ffff88805af3f158 R14: 0000000000000000 R15: ffff88805af3f150
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000030756000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_do_batch kernel/rcu/tree.c:2546 [inline]
rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_schedule_irq+0xf6/0x1c0 kernel/sched/core.c:7087
Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 8b 00 00 00 bf 01 00 00 00 e8 b5 ae 8d f5 e8 80 d9 c7 f5 fb bf 01 00 00 00 75 ab ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 75 c1 24 f6 48
RSP: 0018:ffffc90000b16880 EFLAGS: 00000282
RAX: bebb8a17c3375d00 RBX: 1ffff92000162d18 RCX: ffffffff819d2a9a
RDX: dffffc0000000000 RSI: ffffffff8c2aa4a0 RDI: 0000000000000001
RBP: ffffc90000b16940 R08: ffffffff94514847 R09: 1ffffffff28a2908
R10: dffffc0000000000 R11: fffffbfff28a2909 R12: 1ffff92000162d10
R13: 1ffff92000162d14 R14: ffffc90000b168a0 R15: dffffc0000000000
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:console_flush_all+0x996/0xeb0
Code: 48 21 c3 0f 85 16 02 00 00 e8 46 ee 20 00 4c 8b 7c 24 10 4d 85 f6 75 07 e8 37 ee 20 00 eb 06 e8 30 ee 20 00 fb 48 8b 5c 24 18 <48> 8b 44 24 30 42 80 3c 28 00 74 08 48 89 df e8 56 a2 85 00 4c 8b
RSP: 0018:ffffc90000b16a00 EFLAGS: 00000293
RAX: ffffffff81a0d090 RBX: ffffffff8f37a238 RCX: ffff888020e88000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b16bb0 R08: ffffffff81a0d067 R09: 1ffffffff28a2908
R10: dffffc0000000000 R11: fffffbfff28a2909 R12: ffffffff8f37a1e0
R13: dffffc0000000000 R14: 0000000000000200 R15: ffffc90000b16c00
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
__bch2_fsck_err+0x1044/0x1420 fs/bcachefs/error.c:426
__btree_err+0x64a/0x760 fs/bcachefs/btree_io.c:581
validate_bset_keys+0x5df/0x1af0 fs/bcachefs/btree_io.c:926
bch2_btree_node_read_done+0x2298/0x6180 fs/bcachefs/btree_io.c:1164
btree_node_read_work+0x6dc/0x1380 fs/bcachefs/btree_io.c:1358
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
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90000007bd8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 1ffff1100b5e7e2b RCX: bebb8a17c3375d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88805af3f150
RBP: ffffc90000007e10 R08: ffffffff81a114cc R09: 1ffffffff28a2908
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffffff81a8d767
R13: ffff88805af3f158 R14: 0000000000000000 R15: ffff88805af3f150
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000030756000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 f5 mov %esi,%ebp
2: 49 c1 ed 03 shr $0x3,%r13
6: eb 0d jmp 0x15
8: 48 f7 03 08 00 00 00 testq $0x8,(%rbx)
f: 0f 84 8b 00 00 00 je 0xa0
15: bf 01 00 00 00 mov $0x1,%edi
1a: e8 b5 ae 8d f5 call 0xf58daed4
1f: e8 80 d9 c7 f5 call 0xf5c7d9a4
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 75 ab ff ff call 0xffffaba4 <-- trapping instruction
2f: 43 80 7c 3d 00 00 cmpb $0x0,0x0(%r13,%r15,1)
35: 74 08 je 0x3f
37: 4c 89 f7 mov %r14,%rdi
3a: e8 75 c1 24 f6 call 0xf624c1b4
3f: 48 rex.W