./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor59713746 <...> Warning: Permanently added '10.128.0.164' (ED25519) to the list of known hosts. execve("./syz-executor59713746", ["./syz-executor59713746"], 0x7ffd704872b0 /* 10 vars */) = 0 brk(NULL) = 0x5555555dc000 brk(0x5555555dcd00) = 0x5555555dcd00 arch_prctl(ARCH_SET_FS, 0x5555555dc380) = 0 set_tid_address(0x5555555dc650) = 5069 set_robust_list(0x5555555dc660, 24) = 0 rseq(0x5555555dcca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor59713746", 4096) = 26 getrandom("\xfd\x48\x96\xc2\x5f\xfe\x78\x97", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555555dcd00 brk(0x5555555fdd00) = 0x5555555fdd00 brk(0x5555555fe000) = 0x5555555fe000 mprotect(0x7ff5f75c9000, 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 [ 54.281406][ T5069] BUG: sleeping function called from invalid context at kernel/printk/printk.c:2634 [ 54.290930][ T5069] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5069, name: syz-executor597 [ 54.300376][ T5069] preempt_count: 1, expected: 0 [ 54.305199][ T5069] RCU nest depth: 0, expected: 0 [ 54.310109][ T5069] 3 locks held by syz-executor597/5069: [ 54.315717][ T5069] #0: ffff88807a5ed0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 [ 54.325462][ T5069] #1: ffff88807a5ed130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 [ 54.336748][ T5069] #2: ffff88807aa8a3e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x62/0x150 [ 54.345770][ T5069] irq event stamp: 3932 [ 54.349899][ T5069] hardirqs last enabled at (3931): [] _raw_spin_unlock_irq+0x23/0x50 [ 54.359597][ T5069] hardirqs last disabled at (3932): [] _raw_spin_lock_irqsave+0x4e/0x50 [ 54.369471][ T5069] softirqs last enabled at (3596): [] __do_softirq+0x597/0x8de [ 54.378647][ T5069] softirqs last disabled at (3567): [] irq_exit_rcu+0xb7/0x120 [ 54.387747][ T5069] Preemption disabled at: [ 54.387752][ T5069] [<0000000000000000>] 0x0 [ 54.396496][ T5069] CPU: 1 PID: 5069 Comm: syz-executor597 Not tainted 6.7.0-rc2-syzkaller-00206-gb46ae77f6787 #0 [ 54.406901][ T5069] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 54.416934][ T5069] Call Trace: [ 54.420197][ T5069] [ 54.423106][ T5069] dump_stack_lvl+0xd9/0x1b0 [ 54.427676][ T5069] __might_resched+0x3c3/0x5e0 [ 54.432420][ T5069] ? preempt_count_sub+0x160/0x160 [ 54.437537][ T5069] ? add_lock_to_list+0x17d/0x380 [ 54.442559][ T5069] console_lock+0x34/0x150 [ 54.446953][ T5069] do_con_write+0x145/0x7f40 [ 54.451528][ T5069] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 54.457491][ T5069] ? preempt_count_sub+0x160/0x160 [ 54.462582][ T5069] ? reset_palette+0x2a0/0x2a0 [ 54.467322][ T5069] ? lock_acquire+0x1ae/0x520 [ 54.471984][ T5069] ? lock_sync+0x190/0x190 [ 54.476385][ T5069] ? do_raw_spin_lock+0x12e/0x2b0 [ 54.481385][ T5069] ? spin_bug+0x1d0/0x1d0 [ 54.485693][ T5069] con_write+0x23/0xb0 [ 54.489760][ T5069] gsmld_write+0xd0/0x150 [ 54.494067][ T5069] ? gsm_dlci_copy_config_values+0x300/0x300 [ 54.500026][ T5069] file_tty_write.constprop.0+0x519/0x9b0 [ 54.505726][ T5069] vfs_write+0x64f/0xdf0 [ 54.509949][ T5069] ? kernel_write+0x6c0/0x6c0 [ 54.514611][ T5069] ? __fget_light+0x1fc/0x260 [ 54.519267][ T5069] ksys_write+0x12f/0x250 [ 54.523575][ T5069] ? __ia32_sys_read+0xb0/0xb0 [ 54.528318][ T5069] ? syscall_trace_enter.constprop.0+0xaf/0x1e0 [ 54.534542][ T5069] do_syscall_64+0x40/0x110 [ 54.539026][ T5069] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 54.544902][ T5069] RIP: 0033:0x7ff5f7556569 [ 54.549297][ T5069] 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 [ 54.568881][ T5069] RSP: 002b:00007ffd5e76b908 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 write(3, NULL, 0) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 54.577267][ T5069] RAX: ffffffffffffffda RBX: 00007ffd5e76bad8 R