./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4145492520 <...> DUID 00:04:15:32:48:1d:3b:73:54:4f:46:a6:7d:b2:d0:ec:1f:b1 forked to background, child pid 3181 [ 24.911434][ T3182] 8021q: adding VLAN 0 to HW filter on device bond0 [ 24.920735][ T3182] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts. execve("./syz-executor4145492520", ["./syz-executor4145492520"], 0x7fffddf4e3b0 /* 10 vars */) = 0 brk(NULL) = 0x5555559df000 brk(0x5555559dfc40) = 0x5555559dfc40 arch_prctl(ARCH_SET_FS, 0x5555559df300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor4145492520", 4096) = 28 brk(0x555555a00c40) = 0x555555a00c40 brk(0x555555a01000) = 0x555555a01000 mprotect(0x7f4ee92aa000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/sys/kernel/debug/damon/rm_contexts", O_RDWR|O_APPEND|O_NOFOLLOW|O_CLOEXEC|FASYNC) = 3 write(3, "\x88\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x01\x80\x00\x00\x00\x00\x00\x00\x24\x00\x00\x00\x75\xe0\xa5\x1b\x2f\x73\x79\x73\x2f\x6b\x65\x72\x6e\x65\x6c\x2f\x64\x65\x62\x75\x67\x2f\x64\x61\x6d\x6f\x6e\x2f\x72\x6d\x5f\x63\x6f\x6e\x74\x65\x78\x74\x73\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x24\x00\x00\x00"..., 392) = -1 ENOENT (No such file or directory) syzkaller login: [ 41.101067][ T3603] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 41.113607][ T3603] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 41.122094][ T3603] CPU: 1 PID: 3603 Comm: syz-executor414 Not tainted 6.1.0-rc2-syzkaller-00078-g98555239e4c3 #0 [ 41.133135][ T3603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 41.143296][ T3603] RIP: 0010:dbgfs_rm_context_write+0x2e3/0x4d0 [ 41.149568][ T3603] Code: 00 4d 8b 36 4c 39 34 24 0f 84 e4 00 00 00 e8 34 c3 a7 ff 48 8b 44 24 18 49 63 d4 48 c1 e2 03 48 8d 34 10 48 89 f7 48 c1 ef 03 <80> 3c 2f 00 0f 85 6b 01 00 00 48 8b 05 2c 85 52 0f 4c 89 36 41 83 [ 41.169304][ T3603] RSP: 0018:ffffc90003d3fcb0 EFLAGS: 00010202 [ 41.175481][ T3603] RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000 [ 41.183624][ T3603] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000002 [ 41.191681][ T3603] RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 [ 41.200362][ T3603] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 [ 41.208339][ T3603] R13: ffff88806f180000 R14: ffff88801b67a468 R15: 0000000000000000 [ 41.216418][ T3603] FS: 00005555559df300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 41.225374][ T3603] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.232001][ T3603] CR2: 000000002000f000 CR3: 000000007e9a6000 CR4: 00000000003506e0 [ 41.240507][ T3603] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.248492][ T3603] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.256481][ T3603] Call Trace: [ 41.259863][ T3603] [ 41.263239][ T3603] full_proxy_write+0x118/0x180 [ 41.268544][ T3603] vfs_write+0x2d7/0xdd0 [ 41.272899][ T3603] ? full_proxy_poll+0x170/0x170 [ 41.277848][ T3603] ? kernel_write+0x630/0x630 [ 41.282538][ T3603] ? recalc_sigpending_tsk+0x18f/0x1d0 [ 41.288021][ T3603] ? ptrace_stop.part.0+0x5f4/0x8c0 [ 41.293403][ T3603] ? rcu_read_lock_sched_held+0xd/0x70 [ 41.298897][ T3603] ? lock_release+0x5cb/0x810 [ 41.303592][ T3603] ? ptrace_notify+0xfa/0x140 [ 41.308385][ T3603] ? lock_downgrade+0x6e0/0x6e0 [ 41.313380][ T3603] ? __fget_light+0x20a/0x270 [ 41.319040][ T3603] ksys_write+0x127/0x250 [ 41.323396][ T3603] ? __ia32_sys_read+0xb0/0xb0 [ 41.329481][ T3603] ? _raw_spin_unlock_irq+0x2a/0x40 [ 41.335492][ T3603] ? ptrace_notify+0xfa/0x140 [ 41.340196][ T3603] do_syscall_64+0x35/0xb0 [ 41.344729][ T3603] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 41.350647][ T3603] RIP: 0033:0x7f4ee923dd69 [ 41.355155][ T3603] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 41.375815][ T3603] RSP: 002b:00007ffd47563a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.384274][ T3603] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4ee923dd69 [ 41.392686][ T3603] RDX: 000000000000fe6c RSI: 0000000020000080 RDI: 0000000000000003 [ 41.401290][ T3603] RBP: 00007f4ee9201f10 R08: 0000000000000000 R09: 0000000000000000 [ 41.409281][ T3603] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4ee9201fa0 [ 41.417260][ T3603] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 41.426741][ T3603] [ 41.430401][ T3603] Modules linked in: [ 41.435027][ T3603] ---[ end trace 0000000000000000 ]--- [ 41.440756][ T3603] RIP: 0010:dbgfs_rm_context_write+0x2e3/0x4d0 [ 41.447207][ T3603] Code: 00 4d 8b 36 4c 39 34 24 0f 84 e4 00 00 00 e8 34 c3 a7 ff 48 8b 44 24 18 49 63 d4 48 c1 e2 03 48 8d 34 10 48 89 f7 48 c1 ef 03 <80> 3c 2f 00 0f 85 6b 01 00 00 48 8b 05 2c 85 52 0f 4c 89 36 41 83 [ 41.467050][ T3603] RSP: 0018:ffffc90003d3fcb0 EFLAGS: 00010202 [ 41.473169][ T3603] RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000 [ 41.481157][ T3603] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000002 [ 41.489548][ T3603] RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 [ 41.498429][ T3603] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 [ 41.507991][ T3603] R13: ffff88806f180000 R14: ffff88801b67a468 R15: 0000000000000000 [ 41.516036][ T3603] FS: 00005555559df300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 41.525181][ T3603] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.531755][ T3603] CR2: 0000561931b2a098 CR3: 000000007e9a6000 CR4: 00000000003506f0 [ 41.539783][ T3603] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.548499][ T3603] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.559181][ T3603] Kernel panic - not syncing: Fatal exception [ 41.565517][ T3603] Kernel Offset: disabled [ 41.569833][ T3603] Rebooting in 86400 seconds..