kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1706 Comm: syz.2.394 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__hlist_del include/linux/list.h:791 [inline] RIP: 0010:detach_timer kernel/time/timer.c:824 [inline] RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline] RIP: 0010:__run_timers+0x74b/0xb60 kernel/time/timer.c:1817 Code: 89 ef e8 88 d8 3c 00 4d 89 65 00 4d 85 e4 74 2e e8 aa dd 0e 00 49 83 c4 08 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 57 d8 3c 00 4d 89 2c 24 eb 05 e8 7c RSP: 0018:ffff8881f6e09d40 EFLAGS: 00010807 RAX: 100000003a583e05 RBX: 1ffff1103c9f6e39 RCX: dffffc0000000000 RDX: 0000000080000101 RSI: 0000000000000004 RDI: ffff8881f6e09cc0 RBP: ffff8881f6e09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 80000001d2c1f02d R13: ffff8881f6e09e08 R14: ffff8881e4fb71c8 R15: 1ffff1103c9f6e38 FS: 00007f8241d466c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555573c304a8 CR3: 00000001d7eb1000 CR4: 00000000003406b0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830 __do_softirq+0x236/0x660 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x197/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:539 [inline] smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:arch_stack_walk+0x115/0x140 arch/x86/kernel/stacktrace.c:30 Code: e8 90 94 05 00 48 85 c0 74 20 48 89 df 48 89 c6 31 d2 41 ff d6 84 c0 74 11 4c 89 ff e8 a4 95 05 00 83 bd 78 ff ff ff 00 75 d3 <65> 48 8b 04 25 28 00 00 00 48 3b 45 d8 75 0d 48 83 c4 68 5b 41 5c RSP: 0018:ffff8881d4c1f348 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8881d4c1f400 RCX: ffff8881e4ab5e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881e4ab5e80 RBP: ffff8881d4c1f3d0 R08: dffffc0000000000 R09: ffffed103edcb135 R10: ffffed103edcb135 R11: 1ffff1103edcb134 R12: ffff8881e4ab5e80 R13: 1ffff1103a983e7c R14: ffffffff814fbbf0 R15: ffff8881d4c1f348 stack_trace_save+0xaa/0xf0 kernel/stacktrace.c:123 save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] kasan_set_free_info mm/kasan/common.c:345 [inline] __kasan_slab_free+0x1c3/0x280 mm/kasan/common.c:487 kasan_slab_free+0xe/0x10 mm/kasan/common.c:496 slab_free_hook mm/slub.c:1455 [inline] slab_free_freelist_hook+0xb7/0x180 mm/slub.c:1494 slab_free mm/slub.c:3080 [inline] kmem_cache_free+0x10c/0x2c0 mm/slub.c:3096 anon_vma_chain_free mm/rmap.c:136 [inline] unlink_anon_vmas+0x555/0x590 mm/rmap.c:424 free_pgtables+0x1ec/0x280 mm/memory.c:413 exit_mmap+0x2ca/0x520 mm/mmap.c:3192 __mmput+0x92/0x2e0 kernel/fork.c:1101 mmput+0x47/0x60 kernel/fork.c:1122 exit_mm kernel/exit.c:538 [inline] do_exit+0x99f/0x2660 kernel/exit.c:848 do_group_exit+0x13e/0x300 kernel/exit.c:984 get_signal+0xdee/0x13d0 kernel/signal.c:2738 do_signal+0xad/0xda0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0xc4/0x1b0 arch/x86/entry/common.c:159 prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194 syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f82436dd969 Code: Bad RIP value. RSP: 002b:00007f8241d46038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000009 RBX: 00007f8243904fa0 RCX: 00007f82436dd969 RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c RBP: 00007f824375fab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8243904fa0 R15: 00007ffe3a93d3c8 Modules linked in: ---[ end trace 647257b58099390a ]--- RIP: 0010:__hlist_del include/linux/list.h:791 [inline] RIP: 0010:detach_timer kernel/time/timer.c:824 [inline] RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline] RIP: 0010:__run_timers+0x74b/0xb60 kernel/time/timer.c:1817 Code: 89 ef e8 88 d8 3c 00 4d 89 65 00 4d 85 e4 74 2e e8 aa dd 0e 00 49 83 c4 08 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 57 d8 3c 00 4d 89 2c 24 eb 05 e8 7c RSP: 0018:ffff8881f6e09d40 EFLAGS: 00010807 RAX: 100000003a583e05 RBX: 1ffff1103c9f6e39 RCX: dffffc0000000000 RDX: 0000000080000101 RSI: 0000000000000004 RDI: ffff8881f6e09cc0 RBP: ffff8881f6e09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 80000001d2c1f02d R13: ffff8881f6e09e08 R14: ffff8881e4fb71c8 R15: 1ffff1103c9f6e38 FS: 00007f8241d466c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f82436dd93f CR3: 00000001d7eb1000 CR4: 00000000003406b0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 89 ef mov %ebp,%edi 2: e8 88 d8 3c 00 call 0x3cd88f 7: 4d 89 65 00 mov %r12,0x0(%r13) b: 4d 85 e4 test %r12,%r12 e: 74 2e je 0x3e 10: e8 aa dd 0e 00 call 0xeddbf 15: 49 83 c4 08 add $0x8,%r12 19: 4c 89 e0 mov %r12,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 57 d8 3c 00 call 0x3cd88f 38: 4d 89 2c 24 mov %r13,(%r12) 3c: eb 05 jmp 0x43 3e: e8 .byte 0xe8 3f: 7c .byte 0x7c