[12147] 0 12147 17585 8228 24 3 0 1000 syz-executor1 [12150] 0 12150 17618 8407 26 4 0 1000 syz-executor3 [12158] 0 12158 17585 8227 24 3 0 1000 syz-executor3 [12159] 0 12159 17585 8228 24 3 0 1000 syz-executor1 INFO: task syz-executor0:6913 blocked for more than 140 seconds. Not tainted 4.14.89+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D29936 6913 1845 0x10000004 [12160] 0 12160 17585 8405 26 4 0 1000 syz-executor1 [12164] 0 12164 17585 8228 24 3 0 1000 syz-executor1 Call Trace: [12169] 0 12169 17618 8407 26 4 0 1000 syz-executor3 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 [12172] 0 12172 17585 8228 24 3 0 1000 syz-executor1 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [12188] 0 12188 17585 8228 24 3 0 1000 syz-executor1 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 [12193] 0 12193 17585 8226 23 3 0 1000 syz-executor3 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 [12195] 0 12195 17585 8228 24 3 0 1000 syz-executor1 [12197] 0 12197 17585 8406 27 4 0 1000 syz-executor1 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [12203] 0 12203 17618 8406 26 4 0 1000 syz-executor3 [12207] 0 12207 17585 8228 24 3 0 1000 syz-executor1 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 [12215] 0 12215 17585 8226 23 3 0 1000 syz-executor3 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457669 [12216] 0 12216 17585 8228 24 3 0 1000 syz-executor1 RSP: 002b:00007fbaf6b80c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 [12219] 0 12219 17618 8406 26 4 0 1000 syz-executor3 [12223] 0 12223 17618 8231 25 3 0 1000 syz-executor1 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000072bfa0 R08: 0000000000000010 R09: 0000000000000000 [12227] 0 12227 17585 8226 23 3 0 1000 syz-executor3 [12231] 0 12231 17618 8406 26 4 0 1000 syz-executor3 R10: 00000000200000c0 R11: 0000000000000246 R12: 00007fbaf6b816d4 [12242] 0 12242 17585 8227 24 3 0 1000 syz-executor3 R13: 00000000004c4eba R14: 00000000004d8f70 R15: 00000000ffffffff INFO: task syz-executor0:6935 blocked for more than 140 seconds. [12245] 0 12245 17585 8228 24 3 0 1000 syz-executor1 [12251] 0 12251 17618 8231 25 3 0 1000 syz-executor1 Not tainted 4.14.89+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [12273] 0 12273 17585 8227 24 3 0 1000 syz-executor3 syz-executor0 D30248 6935 1845 0x10000004 [12274] 0 12274 17585 8228 24 3 0 1000 syz-executor1 Call Trace: [12280] 0 12280 17618 8407 26 4 0 1000 syz-executor3 [12281] 0 12281 17618 8231 25 3 0 1000 syz-executor1 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [12286] 0 12286 17585 8227 24 3 0 1000 syz-executor3 [12291] 0 12291 17618 8407 26 4 0 1000 syz-executor3 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 [12295] 0 12295 17585 8228 24 3 0 1000 syz-executor1 [12297] 0 12297 17585 8227 24 3 0 1000 syz-executor3 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [12304] 0 12304 17618 8407 26 4 0 1000 syz-executor3 [12310] 0 12310 17585 8228 24 3 0 1000 syz-executor1 [12312] 0 12312 17585 8227 24 3 0 1000 syz-executor3 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457669 RSP: 002b:00007fbaf6b3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [12327] 0 12327 17585 8227 24 3 0 1000 syz-executor3 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000007 RBP: 000000000072c0e0 R08: 0000000000000010 R09: 0000000000000000 [12331] 0 12331 17585 8228 24 3 0 1000 syz-executor1 R10: 00000000200000c0 R11: 0000000000000246 R12: 00007fbaf6b3f6d4 [12345] 0 12345 17585 8227 24 3 0 1000 syz-executor3 [12349] 0 12349 17585 8228 24 3 0 1000 syz-executor1 [12359] 0 12359 17585 8227 24 3 0 1000 syz-executor3 [12368] 0 12368 17585 8228 24 3 0 1000 syz-executor1 [12371] 0 12371 17618 8408 27 4 0 1000 syz-executor1 [12388] 0 12388 17585 8228 24 3 0 1000 syz-executor1 R13: 00000000004c4eba R14: 00000000004d8f70 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by init/1: [12389] 0 12389 17585 8227 24 3 0 1000 syz-executor3 #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 2 locks held by getty/1759: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-executor3/1848: [12392] 0 12392 17585 8230 24 3 0 1000 syz-executor4 #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x35/0x3d0 net/netfilter/x_tables.c:1092 1 lock held by syz-executor1/15109: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x4e/0x110 fs/exec.c:1389 2 locks held by syz-executor2/2119: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156 2 locks held by syz-executor2/2141: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156 ============================================= [12399] 0 12399 17618 8408 27 4 0 1000 syz-executor1 [12400] 0 12400 17585 8227 24 3 0 1000 syz-executor3 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.89+ #26 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: [12410] 0 12410 17618 8426 27 4 0 1000 syz-executor4 NMI backtrace for cpu 0 CPU: 0 PID: 1676 Comm: cron Not tainted 4.14.89+ #26 task: ffff8881c39ede00 task.stack: ffff8881d42d0000 RIP: 0010:__lock_acquire+0x196/0x4320 kernel/locking/lockdep.c:3392 RSP: 0000:ffff8881d42d73c0 EFLAGS: 00000002 RAX: ffffffff8b314c10 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffffffff1459694 RSI: 0000000000000000 RDI: ffffffff8a2cb4a0 RBP: ffff8881d42d75a8 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8a2cb498 R14: 0000000000000000 R15: ffff8881c39ede00 FS: 00007fc2898db7a0(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe850c30a3e CR3: 00000001d4866005 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x10f/0x380 kernel/locking/lockdep.c:3991 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 console_unlock+0x96/0xc80 kernel/printk/printk.c:2336 vprintk_emit+0x125/0x320 kernel/printk/printk.c:1917 vprintk_func+0x58/0x159 kernel/printk/printk_safe.c:401 printk+0xa7/0xcf kernel/printk/printk.c:1990 dump_tasks mm/oom_kill.c:396 [inline] dump_header+0x70b/0x7a8 mm/oom_kill.c:428 oom_kill_process.cold.8+0x10/0xc88 mm/oom_kill.c:861 out_of_memory+0x669/0xa60 mm/oom_kill.c:1075 __alloc_pages_may_oom mm/page_alloc.c:3356 [inline] __alloc_pages_slowpath mm/page_alloc.c:4045 [inline] __alloc_pages_nodemask+0x182f/0x2180 mm/page_alloc.c:4210 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] page_cache_read mm/filemap.c:2286 [inline] filemap_fault+0xcdd/0x14a0 mm/filemap.c:2470 ext4_filemap_fault+0x7d/0xb0 fs/ext4/inode.c:6179 __do_fault+0x80/0x210 mm/memory.c:3194 do_read_fault mm/memory.c:3604 [inline] do_fault mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:3960 [inline] __handle_mm_fault+0x991/0x25f0 mm/memory.c:4084 handle_mm_fault+0x2f2/0x6eb mm/memory.c:4121 __do_page_fault+0x45d/0xb60 arch/x86/mm/fault.c:1425 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1104 RIP: 6fe5e700: (null) RSP: 8905aaa4:000000000250d720 EFLAGS: 00000001 Code: 00 00 e8 ae 96 ff ff 8b 8c 24 88 00 00 00 48 85 c0 44 8b 84 24 80 00 00 00 44 8b 4c 24 78 0f 84 da 07 00 00 f0 ff 80 38 01 00 00 <49> 8d 9f 28 08 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 de 48