./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor643762937 <...> no interfaces have a carrier [ 24.166083][ T3186] 8021q: adding VLAN 0 to HW filter on device bond0 [ 24.177258][ T3186] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: [ 24.481819][ T3275] sshd (3275) used greatest stack depth: 22392 bytes left OK syzkaller Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. execve("./syz-executor643762937", ["./syz-executor643762937"], 0x7ffd344658e0 /* 10 vars */) = 0 brk(NULL) = 0x5555574d5000 brk(0x5555574d5c40) = 0x5555574d5c40 arch_prctl(ARCH_SET_FS, 0x5555574d5300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor643762937", 4096) = 27 brk(0x5555574f6c40) = 0x5555574f6c40 brk(0x5555574f7000) = 0x5555574f7000 mprotect(0x7fb20deff000, 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: [ 41.221227][ T3606] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 41.233298][ T3606] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 41.241802][ T3606] CPU: 0 PID: 3606 Comm: syz-executor643 Not tainted 6.1.0-rc3-syzkaller-00239-g10d916c86eca #0 [ 41.252198][ T3606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 41.262243][ T3606] RIP: 0010:dbgfs_rm_context_write+0x2e3/0x4d0 [ 41.268387][ T3606] Code: 00 4d 8b 36 4c 39 34 24 0f 84 e4 00 00 00 e8 54 c1 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 3c 83 52 0f 4c 89 36 41 83 [ 41.287992][ T3606] RSP: 0018:ffffc90003ddfcb0 EFLAGS: 00010212 [ 41.294078][ T3606] RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000 [ 41.302045][ T3606] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000002 [ 41.310043][ T3606] RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 [ 41.318008][ T3606] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 41.325977][ T3606] R13: ffff88806f0a0000 R14: ffff88801b2d7608 R15: 0000000000000000 [ 41.334048][ T3606] FS: 00005555574d5300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 41.342970][ T3606] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.349543][ T3606] CR2: 000000002000f000 CR3: 000000007b257000 CR4: 0000000000350ef0 [ 41.357504][ T3606] Call Trace: [ 41.360771][ T3606] [ 41.363690][ T3606] full_proxy_write+0x118/0x180 [ 41.368537][ T3606] vfs_write+0x2d7/0xdd0 [ 41.372776][ T3606] ? full_proxy_poll+0x170/0x170 [ 41.377701][ T3606] ? kernel_write+0x630/0x630 [ 41.382372][ T3606] ? find_held_lock+0x2d/0x110 [ 41.387122][ T3606] ? ptrace_notify+0xfa/0x140 [ 41.391792][ T3606] ? lock_downgrade+0x6e0/0x6e0 [ 41.396632][ T3606] ? __fget_light+0x20a/0x270 [ 41.401301][ T3606] ksys_write+0x127/0x250 [ 41.405627][ T3606] ? __ia32_sys_read+0xb0/0xb0 [ 41.410385][ T3606] ? lockdep_hardirqs_on+0x79/0x100 [ 41.415591][ T3606] ? _raw_spin_unlock_irq+0x2a/0x40 [ 41.420781][ T3606] ? ptrace_notify+0xfa/0x140 [ 41.425449][ T3606] do_syscall_64+0x35/0xb0 [ 41.430066][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 41.435957][ T3606] RIP: 0033:0x7fb20de92d69 [ 41.440707][ T3606] 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 [ 41.460397][ T3606] RSP: 002b:00007ffd47c11e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.468800][ T3606] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb20de92d69 [ 41.476757][ T3606] RDX: 000000000000fe6c RSI: 0000000020000080 RDI: 0000000000000003 [ 41.484712][ T3606] RBP: 00007fb20de56f10 R08: 0000000000000000 R09: 0000000000000000 [ 41.492850][ T3606] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb20de56fa0 [ 41.500846][ T3606] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 41.508814][ T3606] [ 41.511849][ T3606] Modules linked in: [ 41.516038][ T3606] ---[ end trace 0000000000000000 ]--- [ 41.521568][ T3606] RIP: 0010:dbgfs_rm_context_write+0x2e3/0x4d0 [ 41.527836][ T3606] Code: 00 4d 8b 36 4c 39 34 24 0f 84 e4 00 00 00 e8 54 c1 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 3c 83 52 0f 4c 89 36 41 83 [ 41.547485][ T3606] RSP: 0018:ffffc90003ddfcb0 EFLAGS: 00010212 [ 41.553564][ T3606] RAX: 0000000000000010 RBX: 0000000000000000 RCX: 0000000000000000 [ 41.561554][ T3606] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000002 [ 41.569542][ T3606] RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 [ 41.577527][ T3606] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 41.585517][ T3606] R13: ffff88806f0a0000 R14: ffff88801b2d7608 R15: 0000000000000000 [ 41.593479][ T3606] FS: 00005555574d5300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 41.602473][ T3606] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.609091][ T3606] CR2: 00000000005decd0 CR3: 000000007b257000 CR4: 0000000000350ee0 [ 41.617089][ T3606] Kernel panic - not syncing: Fatal exception [ 41.624202][ T3606] Kernel Offset: disabled [ 41.628519][ T3606] Rebooting in 86400 seconds..