./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor921307243 <...> Warning: Permanently added '10.128.0.253' (ECDSA) to the list of known hosts. execve("./syz-executor921307243", ["./syz-executor921307243"], 0x7ffe31cc3d20 /* 10 vars */) = 0 brk(NULL) = 0x555556da2000 brk(0x555556da2c40) = 0x555556da2c40 arch_prctl(ARCH_SET_FS, 0x555556da2300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor921307243", 4096) = 27 brk(0x555556dc3c40) = 0x555556dc3c40 brk(0x555556dc4000) = 0x555556dc4000 mprotect(0x7f2f0fbb3000, 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: [ 36.622436][ T3609] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 36.634182][ T3609] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 36.642578][ T3609] CPU: 1 PID: 3609 Comm: syz-executor921 Not tainted 6.1.0-rc2-syzkaller-00070-g4dc12f37a8e9 #0 [ 36.652967][ T3609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 36.663012][ T3609] RIP: 0010:dbgfs_rm_context_write+0x2f5/0x4b0 [ 36.669173][ T3609] Code: 00 00 e8 ce ab 9f ff 48 63 4c 24 08 48 8b 04 24 48 89 4c 24 28 48 8d 2c c8 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 bd a4 f3 ff 4c 03 2d d6 69 88 0f 4c [ 36.688854][ T3609] RSP: 0018:ffffc90003d9fc28 EFLAGS: 00010202 [ 36.694934][ T3609] RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 [ 36.702891][ T3609] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 36.710848][ T3609] RBP: 0000000000000010 R08: ffffffff81e823c4 R09: fffffbfff1c1b5f6 [ 36.718813][ T3609] R10: fffffbfff1c1b5f6 R11: 1ffffffff1c1b5f5 R12: ffff888078000000 [ 36.726770][ T3609] R13: 0000000000000000 R14: 000000000000fe6c R15: ffff88801c2e4468 [ 36.734731][ T3609] FS: 0000555556da2300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 36.743645][ T3609] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.750229][ T3609] CR2: 000000002000f000 CR3: 0000000073a12000 CR4: 00000000003506e0 [ 36.758190][ T3609] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.766150][ T3609] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.774106][ T3609] Call Trace: [ 36.777376][ T3609] [ 36.780298][ T3609] full_proxy_write+0x10c/0x1c0 [ 36.785142][ T3609] ? full_proxy_read+0x1c0/0x1c0 [ 36.790071][ T3609] vfs_write+0x303/0xc50 [ 36.794309][ T3609] ? do_raw_spin_unlock+0x134/0x8a0 [ 36.799504][ T3609] ? file_end_write+0x230/0x230 [ 36.804519][ T3609] ? ptrace_stop+0x74d/0x970 [ 36.809101][ T3609] ? do_raw_spin_unlock+0x134/0x8a0 [ 36.814307][ T3609] ? _raw_spin_unlock_irq+0x2a/0x40 [ 36.819512][ T3609] ? __fdget_pos+0x252/0x2e0 [ 36.824201][ T3609] ksys_write+0x177/0x2a0 [ 36.828537][ T3609] ? __ia32_sys_read+0x80/0x80 [ 36.833303][ T3609] ? syscall_enter_from_user_mode+0x86/0x1d0 [ 36.839309][ T3609] do_syscall_64+0x3d/0xb0 [ 36.843729][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 36.849628][ T3609] RIP: 0033:0x7f2f0fb46d69 [ 36.854034][ T3609] 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 [ 36.873628][ T3609] RSP: 002b:00007fffcfa0f478 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 36.882033][ T3609] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f0fb46d69 [ 36.889995][ T3609] RDX: 000000000000fe6c RSI: 0000000020000080 RDI: 0000000000000003 [ 36.897955][ T3609] RBP: 00007f2f0fb0af10 R08: 0000000000000000 R09: 0000000000000000 [ 36.905913][ T3609] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2f0fb0afa0 [ 36.913872][ T3609] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 36.921834][ T3609] [ 36.924840][ T3609] Modules linked in: [ 36.929563][ T3609] ---[ end trace 0000000000000000 ]--- [ 36.935181][ T3609] RIP: 0010:dbgfs_rm_context_write+0x2f5/0x4b0 [ 36.941365][ T3609] Code: 00 00 e8 ce ab 9f ff 48 63 4c 24 08 48 8b 04 24 48 89 4c 24 28 48 8d 2c c8 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 bd a4 f3 ff 4c 03 2d d6 69 88 0f 4c [ 36.960999][ T3609] RSP: 0018:ffffc90003d9fc28 EFLAGS: 00010202 [ 36.967052][ T3609] RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 [ 36.975130][ T3609] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 36.983125][ T3609] RBP: 0000000000000010 R08: ffffffff81e823c4 R09: fffffbfff1c1b5f6 [ 36.991142][ T3609] R10: fffffbfff1c1b5f6 R11: 1ffffffff1c1b5f5 R12: ffff888078000000 [ 36.999139][ T3609] R13: 0000000000000000 R14: 000000000000fe6c R15: ffff88801c2e4468 [ 37.007145][ T3609] FS: 0000555556da2300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 37.016112][ T3609] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.022710][ T3609] CR2: 00000000005decd0 CR3: 0000000073a12000 CR4: 00000000003506f0 [ 37.030849][ T3609] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.038828][ T3609] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.046855][ T3609] Kernel panic - not syncing: Fatal exception [ 37.053074][ T3609] Kernel Offset: disabled [ 37.057390][ T3609] Rebooting in 86400 seconds..