./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1705316788 <...> Warning: Permanently added '10.128.0.143' (ED25519) to the list of known hosts. execve("./syz-executor1705316788", ["./syz-executor1705316788"], 0x7ffe284cade0 /* 10 vars */) = 0 brk(NULL) = 0x5555574b6000 brk(0x5555574b6d00) = 0x5555574b6d00 arch_prctl(ARCH_SET_FS, 0x5555574b6380) = 0 set_tid_address(0x5555574b6650) = 5066 set_robust_list(0x5555574b6660, 24) = 0 rseq(0x5555574b6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1705316788", 4096) = 28 getrandom("\x0a\x48\x17\x2d\x53\x3c\xb8\x17", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555574b6d00 brk(0x5555574d7d00) = 0x5555574d7d00 brk(0x5555574d8000) = 0x5555574d8000 mprotect(0x7fb08bbc1000, 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, "/dev/char/4:21", O_RDWR) = 3 ioctl(3, TIOCSETD, [21]) = 0 openat(AT_FDCWD, "/dev/char/4:21", O_RDWR) = 4 [ 54.488059][ T5066] BUG: sleeping function called from invalid context at kernel/printk/printk.c:2634 [ 54.497581][ T5066] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5066, name: syz-executor170 [ 54.507113][ T5066] preempt_count: 1, expected: 0 [ 54.511969][ T5066] RCU nest depth: 0, expected: 0 [ 54.516898][ T5066] 3 locks held by syz-executor170/5066: [ 54.522431][ T5066] #0: ffff88807edf00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 [ 54.532197][ T5066] #1: ffff88807edf0130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 [ 54.543497][ T5066] #2: ffff88814b5b53e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x62/0x150 [ 54.552537][ T5066] irq event stamp: 4214 [ 54.556672][ T5066] hardirqs last enabled at (4213): [] _raw_spin_unlock_irq+0x23/0x50 [ 54.566379][ T5066] hardirqs last disabled at (4214): [] _raw_spin_lock_irqsave+0x4e/0x50 [ 54.576347][ T5066] softirqs last enabled at (3744): [] __do_softirq+0x597/0x8de [ 54.585543][ T5066] softirqs last disabled at (3731): [] irq_exit_rcu+0xb7/0x120 [ 54.594647][ T5066] Preemption disabled at: [ 54.594654][ T5066] [<0000000000000000>] 0x0 [ 54.603386][ T5066] CPU: 1 PID: 5066 Comm: syz-executor170 Not tainted 6.7.0-rc2-syzkaller-00265-gd2da77f431ac #0 [ 54.613798][ T5066] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 54.624275][ T5066] Call Trace: [ 54.627554][ T5066] [ 54.630475][ T5066] dump_stack_lvl+0xd9/0x1b0 [ 54.635061][ T5066] __might_resched+0x3c3/0x5e0 [ 54.639995][ T5066] ? preempt_count_sub+0x160/0x160 [ 54.645095][ T5066] ? add_lock_to_list+0x17d/0x380 [ 54.650119][ T5066] console_lock+0x34/0x150 [ 54.654524][ T5066] do_con_write+0x145/0x7f40 [ 54.659113][ T5066] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 54.665093][ T5066] ? preempt_count_sub+0x160/0x160 [ 54.670196][ T5066] ? reset_palette+0x2a0/0x2a0 [ 54.674967][ T5066] ? lock_acquire+0x1ae/0x520 [ 54.679644][ T5066] ? lock_sync+0x190/0x190 [ 54.684055][ T5066] ? do_raw_spin_lock+0x12e/0x2b0 [ 54.689070][ T5066] ? spin_bug+0x1d0/0x1d0 [ 54.693397][ T5066] con_write+0x23/0xb0 [ 54.697460][ T5066] gsmld_write+0xd0/0x150 [ 54.701782][ T5066] ? gsm_dlci_copy_config_values+0x300/0x300 [ 54.707763][ T5066] file_tty_write.constprop.0+0x519/0x9b0 [ 54.713495][ T5066] vfs_write+0x64f/0xdf0 [ 54.717730][ T5066] ? kernel_write+0x6c0/0x6c0 [ 54.722404][ T5066] ? __fget_light+0x1fc/0x260 [ 54.727072][ T5066] ksys_write+0x12f/0x250 [ 54.731393][ T5066] ? __ia32_sys_read+0xb0/0xb0 [ 54.736148][ T5066] ? syscall_trace_enter.constprop.0+0xaf/0x1e0 [ 54.742387][ T5066] do_syscall_64+0x40/0x110 [ 54.746885][ T5066] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 54.752774][ T5066] RIP: 0033:0x7fb08bb4e569 [ 54.757180][ T5066] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 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 b8 ff ff ff f7 d8 64 89 01 48 [ 54.776777][ T5066] RSP: 002b:00007ffdc6e03dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 write(4, NULL, 0) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 54.785178][ T5066] RAX: ffffffffffffffda RBX: 0