[25384] 0 25384 17634 8237 24 3 0 0 syz-executor3 [25388] 0 25388 17634 12723 31 3 0 0 syz-executor5 [25432] 0 25432 17634 12723 31 3 0 0 syz-executor5 [25465] 0 25465 17667 8479 25 4 0 0 syz-executor3 [25474] 0 25474 17634 12723 31 3 0 0 syz-executor5 INFO: task syz-executor3:17930 blocked for more than 140 seconds. [25518] 0 25518 17634 12723 31 3 0 0 syz-executor5 Not tainted 4.14.91+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [25541] 0 25541 17700 8460 32 4 0 0 syz-executor1 syz-executor3 D30384 17930 1833 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x885/0x2830 net/packet/af_packet.c:3780 [25584] 0 25584 17634 12723 31 3 0 0 syz-executor5 [25646] 0 25646 17634 12723 31 3 0 0 syz-executor5 [25686] 0 25686 17634 12723 31 3 0 0 syz-executor5 [25743] 0 25743 17634 12723 31 3 0 0 syz-executor5 [25795] 0 25795 17634 12723 31 3 0 0 syz-executor5 [25868] 0 25868 17634 12723 31 3 0 0 syz-executor5 [25926] 0 25926 17634 12723 31 3 0 0 syz-executor5 [25980] 0 25980 17634 12723 31 3 0 0 syz-executor5 [26013] 0 26013 17601 8233 25 3 0 0 syz-executor3 [26018] 0 26018 17667 8237 25 3 0 0 syz-executor3 [26043] 0 26043 17634 12723 31 3 0 0 syz-executor5 [26131] 0 26131 17634 12723 31 3 0 0 syz-executor5 Showing all locks held in the system: [26179] 0 26179 17634 12723 31 3 0 0 syz-executor5 1 lock held by khungtaskd/23: [26200] 0 26200 17634 12723 31 3 0 0 syz-executor5 #0: (tasklist_lock [26262] 0 26262 17634 12723 31 3 0 0 syz-executor5 [26346] 0 26346 17634 12723 31 3 0 0 syz-executor5 ){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 [26356] 0 26356 17667 12755 31 3 0 0 syz-executor3 2 locks held by udevd/190: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by rs:main Q:Reg/1614: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by rsyslogd/1616: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by getty/1744: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 [26377] 0 26377 17700 9267 25 3 0 0 syz-executor3 2 locks held by syz-fuzzer/1762: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 [26429] 0 26429 17634 12723 31 3 0 0 syz-executor5 2 locks held by syz-fuzzer/1763: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by kworker/u4:1/6180: [26459] 0 26459 17634 12723 31 3 0 0 syz-executor5 #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 2 locks held by kworker/u4:2/6654: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 2 locks held by kworker/u4:15/13441: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 1 lock held by syz-executor1/14542: [26519] 0 26519 17634 12723 31 3 0 0 syz-executor5 #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x51/0x110 fs/exec.c:1389 1 lock held by syz-executor3/17921: #0: (sk_lock-AF_PACKET){+.+.}, at: [] lock_sock include/net/sock.h:1452 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3671 1 lock held by syz-executor3/17933: #0: (sk_lock-AF_PACKET){+.+.}, at: [] lock_sock include/net/sock.h:1452 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3671 2 locks held by modprobe/17951: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 [26586] 0 26586 17634 12723 31 3 0 0 syz-executor5 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by modprobe/17954: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 ============================================= [26639] 0 26639 17634 12723 31 3 0 0 syz-executor5 [26739] 0 26739 17634 8457 25 4 0 0 syz-executor1 [26805] 0 26805 17634 12723 31 3 0 0 syz-executor5 [26832] 0 26832 17634 8479 25 4 0 0 syz-executor3 [26837] 0 26837 17667 8460 25 4 0 0 syz-executor1 [26874] 0 26874 17634 12723 31 3 0 0 syz-executor5 [26903] 0 26903 17601 8230 24 3 0 0 syz-executor1 [26912] 0 26912 17634 8233 24 3 0 0 syz-executor1 [26928] 0 26928 17634 12723 31 3 0 0 syz-executor5 [26959] 0 26959 17601 8230 24 3 0 0 syz-executor1 [26982] 0 26982 17634 12723 31 3 0 0 syz-executor5 [26996] 0 26996 17601 8230 24 3 0 0 syz-executor1 [27012] 0 27012 17601 8230 24 3 0 0 syz-executor1 [27093] 0 27093 17700 8461 25 4 0 0 syz-executor1 [27108] 0 27108 17634 12723 31 3 0 0 syz-executor5 [27120] 0 27120 17700 8461 25 4 0 0 syz-executor1 [27159] 0 27159 17634 12723 31 3 0 0 syz-executor5 [27205] 0 27205 17634 8456 25 4 0 0 syz-executor1 [27227] 0 27227 17634 12723 31 3 0 0 syz-executor5 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.91+ #2 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 [27291] 0 27291 17634 12723 31 3 0 0 syz-executor5 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 1 to CPUs 0: [27340] 0 27340 17634 12723 31 3 0 0 syz-executor5 NMI backtrace for cpu 0 CPU: 0 PID: 17955 Comm: true Not tainted 4.14.91+ #2 task: ffff8881cab69780 task.stack: ffff88805cfd8000 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:65 RSP: 0000:ffff88805cfdf308 EFLAGS: 00000046 RAX: ffff8881cab69780 RBX: 000000000000000a RCX: 0000000000000001 RDX: 0000000000000000 RSI: 1ffff1100b9fbe01 RDI: ffff88805cfdf380 RBP: ffffffff9abf30c7 R08: ffffffff9905cc2a R09: fffffbfff357e619 R10: fffffbfff357e618 R11: ffffffff9abf30c6 R12: ffffffffffffffff R13: ffffffff9905cc2b R14: 000000000009d2b0 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff9067b6580 CR3: 0000000030c96002 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: number+0x84f/0x940 lib/vsprintf.c:456 vsnprintf+0x1dd/0x1380 lib/vsprintf.c:2247 sprintf+0xc0/0x100 lib/vsprintf.c:2383 print_time kernel/printk/printk.c:1224 [inline] print_prefix+0x32e/0x3a0 kernel/printk/printk.c:1247 msg_print_text+0xae/0x1a0 kernel/printk/printk.c:1274 console_unlock+0x222/0xc60 kernel/printk/printk.c:2368 vprintk_emit+0x128/0x330 kernel/printk/printk.c:1917 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0xba/0xed kernel/printk/printk.c:1990 dump_tasks mm/oom_kill.c:396 [inline] dump_header+0x6d8/0x775 mm/oom_kill.c:428 oom_kill_process.cold+0x10/0xc29 mm/oom_kill.c:861 Code: 89 3d fc 1a 71 03 41 bd f4 ff ff ff e8 0c 50 f1 ff 48 c7 05 e6 1a 71 03 00 00 00 00 e9 90 ed ff ff 90 65 48 8b 04 25 c0 de 01 00 <48> 85 c0 74 1a 65 8b 15 bb 51 b1 68 81 e2 00 01 1f 00 75 0b 8b