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: 4127 Comm: syz-executor.4 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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+0x7b0/0xbe0 kernel/time/timer.c:1817 Code: 89 e7 e8 83 4e 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 e5 68 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 52 4e 3f 00 4d 89 65 00 eb 05 e8 b7 RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff1103d6f4e39 RCX: dffffc0000000000 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6e09ce0 RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e28 R13: dead00000000012a R14: 1ffff1103d6f4e38 R15: ffff8881eb7a71c8 FS: 00005555558c9480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e774c6784 CR3: 00000001e9cf5000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x195/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:538 [inline] smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:crc32_body lib/crc32.c:110 [inline] RIP: 0010:crc32_le_generic lib/crc32.c:179 [inline] RIP: 0010:__crc32c_le_base+0xd2/0xd20 lib/crc32.c:202 Code: 00 fc ff df 0f b6 04 10 84 c0 0f 85 6a 01 00 00 41 33 1c f7 0f b6 c3 4c 8d 0c 85 00 8c fa 84 4c 89 c8 48 c1 e8 03 0f b6 04 10 <84> c0 0f 85 7c 01 00 00 0f b6 c7 4c 8d 14 85 00 88 fa 84 4c 89 d0 RSP: 0018:ffff8881e13a7738 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 00000000c5a857aa RCX: ffff8881e3ce5e80 RDX: dffffc0000000000 RSI: 0000000000000057 RDI: ffff8881d4cba2b4 RBP: 0000000000000056 R08: ffff8881d4cba2b8 R09: ffffffff84fa8ea8 R10: ffffffff84fa89f4 R11: ffffffff84fa85ac R12: ffffffff84fa7000 R13: ffffffff84fa7800 R14: 00000000c5a857aa R15: ffff8881d4cba000 chksum_update+0x42/0x90 crypto/crc32c_generic.c:90 crypto_shash_update+0x1db/0x2a0 crypto/shash.c:132 ext4_chksum fs/ext4/ext4.h:2145 [inline] ext4_dirblock_csum fs/ext4/namei.c:366 [inline] ext4_dirblock_csum_set fs/ext4/namei.c:414 [inline] ext4_handle_dirty_dirblock+0x50d/0x6e0 fs/ext4/namei.c:422 add_dirent_to_buf+0x657/0x780 fs/ext4/namei.c:2165 ext4_add_entry+0x917/0x1240 fs/ext4/namei.c:2389 ext4_add_nondir fs/ext4/namei.c:2716 [inline] ext4_symlink+0x8b3/0xef0 fs/ext4/namei.c:3496 vfs_symlink+0x36c/0x500 fs/namei.c:4276 do_symlinkat+0x19b/0x400 fs/namei.c:4303 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f5e774416a7 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff59bfd198 EFLAGS: 00000202 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5e774416a7 RDX: 00007f5e7749f80d RSI: 00000000ffffff9c RDI: 00007fff59bfd250 RBP: 0000000000000001 R08: 0000000000000013 R09: 00007fff59bfcee7 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fff59bfd250 R15: 0000000000000001 Modules linked in: ---[ end trace 43afbb4d835ac7ca ]--- 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+0x7b0/0xbe0 kernel/time/timer.c:1817 Code: 89 e7 e8 83 4e 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 e5 68 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 52 4e 3f 00 4d 89 65 00 eb 05 e8 b7 RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff1103d6f4e39 RCX: dffffc0000000000 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6e09ce0 RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e28 R13: dead00000000012a R14: 1ffff1103d6f4e38 R15: ffff8881eb7a71c8 FS: 00005555558c9480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e774c6784 CR3: 00000001e9cf5000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 89 e7 mov %esp,%edi 2: e8 83 4e 3f 00 call 0x3f4e8a 7: 4d 89 2c 24 mov %r13,(%r12) b: 4d 85 ed test %r13,%r13 e: 74 2e je 0x3e 10: e8 e5 68 0f 00 call 0xf68fa 15: 49 83 c5 08 add $0x8,%r13 19: 4c 89 e8 mov %r13,%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 ef mov %r13,%rdi 33: e8 52 4e 3f 00 call 0x3f4e8a 38: 4d 89 65 00 mov %r12,0x0(%r13) 3c: eb 05 jmp 0x43 3e: e8 .byte 0xe8 3f: b7 .byte 0xb7