R10: 00007ffc8dba3090 R11: 0000000000000246 R12: 00007ffc8d9fa6e0 R13: 00007ffc8d9fa6d0 R14: 00000000000f4240 R15: 000000000006b87e ---[ end trace 0000000000000000 ]--- BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 0 P4D 0 Oops: 0010 [#1] PREEMPT SMP CPU: 1 PID: 7267 Comm: syz-executor343 Tainted: G W 6.0.0-syzkaller-10822-g60bb8154d1d7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90000318ea8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90000318f08 RCX: 0000000000000100 RDX: ffff888115e929c0 RSI: ffffffff8130760d RDI: ffff88812439f998 RBP: 0000000000000101 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000cc774a4a R12: ffff88812439f998 R13: 0000000000000000 R14: 0000000100003ac0 R15: 0000000000000000 FS: 0000555555885300(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000115ca0000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x33/0x1f0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x311/0x420 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0x44/0x90 kernel/time/timer.c:1803 __do_softirq+0xeb/0x2ef kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0xc6/0x110 kernel/softirq.c:650 sysvec_apic_timer_interrupt+0xa2/0xd0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x1e/0x40 kernel/locking/spinlock.c:194 Code: 31 c0 eb f5 0f 1f 84 00 00 00 00 00 48 83 3d 80 c5 64 01 00 74 2b e8 91 05 00 00 90 f7 c6 00 02 00 00 74 01 fb bf 01 00 00 00 6d 31 c7 fc 65 8b 05 16 0b a0 7b 85 c0 74 01 c3 e8 46 94 9e fc RSP: 0018:ffffc900082ffd28 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffff888123f57200 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000246 RDI: 0000000000000001 RBP: ffff888122a5f3d0 R08: 0000000000000000 R09: ffffffff85d9a8e0 R10: 0000000000000002 R11: 00000000005b8d80 R12: 0000000000000246 R13: ffff888122a5f3e8 R14: dead000000000100 R15: ffff888123f57200 scan_object mm/kmemleak.c:1427 [inline] scan_gray_list+0x107/0x1d0 mm/kmemleak.c:1449 kmemleak_scan+0x2a7/0x5e0 mm/kmemleak.c:1594 kmemleak_write+0x316/0x3d0 mm/kmemleak.c:1944 full_proxy_write+0x86/0xc0 fs/debugfs/file.c:236 vfs_write+0x14b/0x540 fs/read_write.c:582 ksys_write+0x9d/0x160 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9ff6b02233 Code: 4c 07 fe e9 6e fe ff ff bf 01 00 00 00 e8 d5 6f 00 00 0f 1f 44 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffc8d9fa678 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000006b807 RCX: 00007f9ff6b02233 RDX: 0000000000000004 RSI: 00007f9ff6b8a335 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000001bd R09: 00007ffc8dba3080 R10: 00007ffc8dba3090 R11: 0000000000000246 R12: 00007ffc8d9fa6e0 R13: 00007ffc8d9fa6d0 R14: 00007ffc8d9fa6a4 R15: 000000000006cb90 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90000318ea8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90000318f08 RCX: 0000000000000100 RDX: ffff888115e929c0 RSI: ffffffff8130760d RDI: ffff88812439f998 RBP: 0000000000000101 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000cc774a4a R12: ffff88812439f998 R13: 0000000000000000 R14: 0000000100003ac0 R15: 0000000000000000 FS: 0000555555885300(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000115ca0000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 31 c0 xor %eax,%eax 2: eb f5 jmp 0xfffffff9 4: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) b: 00 c: 48 83 3d 80 c5 64 01 cmpq $0x0,0x164c580(%rip) # 0x164c594 13: 00 14: 74 2b je 0x41 16: e8 91 05 00 00 callq 0x5ac 1b: 90 nop 1c: f7 c6 00 02 00 00 test $0x200,%esi 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 6d 31 c7 fc callq 0xfcc7319c <-- trapping instruction 2f: 65 8b 05 16 0b a0 7b mov %gs:0x7ba00b16(%rip),%eax # 0x7ba00b4c 36: 85 c0 test %eax,%eax 38: 74 01 je 0x3b 3a: c3 retq 3b: e8 46 94 9e fc callq 0xfc9e9486