[15468] 0 15468 17783 8247 27 4 0 0 syz-executor5 [15502] 0 15502 17783 8247 27 4 0 0 syz-executor5 [15543] 0 15543 17618 8234 25 4 0 0 syz-executor5 [15545] 0 15545 17618 8234 25 4 0 0 syz-executor5 [15718] 0 15718 17618 8202 24 3 0 0 syz-executor5 INFO: task syz-executor4:23696 blocked for more than 140 seconds. Not tainted 4.14.88+ #23 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [15722] 0 15722 17585 8201 24 3 0 0 syz-executor0 [15724] 0 15724 17651 8204 24 3 0 0 syz-executor5 [15726] 0 15726 17618 8205 25 3 0 0 syz-executor0 [15755] 0 15755 17585 8201 24 3 0 0 syz-executor0 [15762] 0 15762 17618 8235 26 4 0 0 syz-executor3 [15819] 0 15819 17618 8235 25 4 0 0 syz-executor0 [15828] 0 15828 17618 8236 25 4 0 0 syz-executor0 [15923] 0 15923 17618 11103 30 4 0 0 syz-executor5 [16313] 0 16313 17585 8198 24 3 0 0 syz-executor4 [16324] 0 16324 17618 8233 26 4 0 1000 syz-executor2 [16465] 0 16465 17585 8229 24 4 0 0 syz-executor4 [16515] 0 16515 17618 8232 25 4 0 0 syz-executor4 [16556] 0 16556 17618 8202 23 3 0 0 syz-executor0 [16567] 0 16567 17651 8204 23 3 0 0 syz-executor0 [16642] 0 16642 17651 8237 27 4 0 1000 syz-executor2 [16662] 0 16662 17585 8192 24 3 0 0 syz-executor3 [16673] 0 16673 17618 8205 25 3 0 0 syz-executor3 [16981] 0 16981 17618 8205 26 3 0 0 syz-executor3 [16989] 0 16989 17750 8213 26 3 0 0 syz-executor3 [16992] 0 16992 17585 8201 24 3 0 0 syz-executor0 [16997] 0 16997 17684 8209 25 3 0 0 syz-executor0 [17001] 0 17001 17618 8235 26 4 0 0 syz-executor5 [17059] 0 17059 17651 8237 26 4 0 0 syz-executor3 [17061] 0 17061 17651 8237 26 4 0 0 syz-executor3 [17108] 0 17108 17618 12677 31 3 0 0 syz-executor0 [17137] 0 17137 17750 9252 26 3 0 0 syz-executor0 [17355] 60929 17355 17684 8240 26 4 0 0 syz-executor3 [17367] 60929 17367 17684 8240 26 4 0 0 syz-executor3 [17527] 0 17527 17618 8237 26 4 0 0 syz-executor5 [17563] 0 17563 17684 8241 27 4 0 0 syz-executor0 [17586] 0 17586 17618 8210 24 3 0 0 syz-executor0 [17592] 0 17592 17684 8214 25 3 0 0 syz-executor0 [17951] 0 17951 17585 8233 25 4 0 0 syz-executor1 [18046] 0 18046 17618 8238 25 4 0 0 syz-executor0 [18091] 0 18091 17618 8204 24 3 0 0 syz-executor0 [18094] 0 18094 17651 8206 24 3 0 0 syz-executor0 [18201] 0 18201 17585 8216 25 4 0 1000 syz-executor2 [18276] 60929 18276 17717 8240 26 4 0 1000 syz-executor2 [18351] 0 18351 17651 8203 25 3 0 1000 syz-executor2 [18372] 0 18372 17783 8212 25 3 0 1000 syz-executor2 [18403] 0 18403 17585 8200 24 3 0 0 syz-executor5 [18420] 0 18420 17651 8237 25 4 0 0 syz-executor0 [18442] 0 18442 17618 8236 26 4 0 0 syz-executor3 [18443] 0 18443 17618 8203 25 3 0 0 syz-executor5 [18538] 0 18538 17651 8237 25 4 0 0 syz-executor0 [18552] 0 18552 17618 8235 26 4 0 0 syz-executor3 [18661] 0 18661 17585 8232 25 4 0 0 syz-executor5 [18709] 0 18709 17585 8232 24 4 0 0 syz-executor0 [18872] 0 18872 17651 8236 25 4 0 0 syz-executor5 [18875] 0 18875 17717 8243 27 4 0 0 syz-executor0 [18876] 0 18876 17651 8236 25 4 0 0 syz-executor5 [18904] 0 18904 17717 8243 27 4 0 0 syz-executor0 [18927] 0 18927 17585 8201 25 3 0 0 syz-executor3 [18951] 0 18951 17651 8206 26 3 0 0 syz-executor3 [18968] 0 18968 17585 8201 24 3 0 0 syz-executor0 [18969] 0 18969 17618 8204 24 3 0 0 syz-executor0 [19064] 0 19064 17618 8235 25 4 0 0 syz-executor5 [19108] 0 19108 17717 8242 25 4 0 0 syz-executor1 [19143] 0 19143 17618 8237 25 4 0 0 syz-executor1 [19274] 0 19274 17651 8237 26 4 0 0 syz-executor3 [19342] 0 19342 17585 8200 24 3 0 0 syz-executor3 [19345] 0 19345 17618 8204 26 3 0 0 syz-executor3 [19746] 0 19746 17585 8202 24 3 0 0 syz-executor0 [19754] 0 19754 17651 8207 25 3 0 0 syz-executor0 [19838] 0 19838 17618 8233 26 4 0 1000 syz-executor2 [19919] 0 19919 17585 8202 25 3 0 0 syz-executor0 [19922] 0 19922 17651 8207 26 3 0 0 syz-executor0 [19928] 0 19928 17585 8198 23 3 0 1000 syz-executor2 [19986] 0 19986 17684 8242 26 4 0 0 syz-executor3 [20090] 0 20090 17684 8241 27 4 0 0 syz-executor3 [20101] 0 20101 17651 8234 25 4 0 0 syz-executor4 [20246] 0 20246 17618 8200 24 3 0 0 syz-executor4 [20262] 0 20262 17671 8204 25 3 0 0 syz-executor4 [20586] 0 20586 17651 8236 25 4 0 0 syz-executor4 [20597] 0 20597 17717 8242 27 4 0 0 syz-executor0 [20612] 0 20612 17651 8237 26 4 0 0 syz-executor3 [20648] 0 20648 17685 8238 24 4 0 0 syz-executor1 [20655] 0 20655 17585 8201 25 3 0 0 syz-executor3 [20684] 0 20684 17618 8233 27 4 0 1000 syz-executor2 [20692] 0 20692 17651 8239 25 4 0 0 syz-executor0 [20756] 0 20756 17651 8205 25 3 0 0 syz-executor3 [20765] 0 20765 17717 8209 25 3 0 0 syz-executor3 [20771] 0 20771 5398 179 15 3 0 -1000 udevd [20804] 0 20804 5398 180 15 3 0 -1000 udevd [20935] 0 20935 17684 8237 26 4 0 1000 syz-executor2 [20999] 0 20999 17684 8240 26 4 0 0 syz-executor0 [21002] 0 21002 17684 8236 26 4 0 0 syz-executor4 [21027] 0 21027 17684 8236 26 4 0 0 syz-executor4 [21064] 0 21064 17618 8238 27 4 0 0 syz-executor3 [21068] 0 21068 17651 8234 25 4 0 0 syz-executor4 [21096] 0 21096 17651 8237 26 4 0 0 syz-executor3 [21126] 0 21126 17618 8208 27 3 0 0 syz-executor0 [21133] 0 21133 17585 8203 25 3 0 0 syz-executor3 [21142] 0 21142 17783 8217 25 3 0 0 syz-executor3 [21194] 0 21194 17684 8238 27 4 0 0 syz-executor4 [21394] 0 21394 17618 8202 24 3 0 0 syz-executor4 [21408] 0 21408 17684 8207 32 3 0 0 syz-executor4 [21608] 0 21608 17585 8232 25 4 0 0 syz-executor4 [21740] 0 21740 17651 8238 26 4 0 0 syz-executor0 [21907] 0 21907 17618 8232 25 4 0 0 syz-executor4 [21911] 0 21911 17585 8233 25 4 0 0 syz-executor0 [21951] 0 21951 17651 8238 25 4 0 0 syz-executor1 [22147] 0 22147 17585 8200 24 3 0 0 syz-executor3 [22170] 0 22170 17717 8243 26 4 0 0 syz-executor3 [22322] 0 22322 17651 8222 26 4 0 0 syz-executor3 [22348] 0 22348 17651 8222 26 4 0 0 syz-executor3 [22616] 0 22616 17652 8237 26 4 0 0 syz-executor5 [22847] 0 22847 17618 8203 25 3 0 0 syz-executor4 [22863] 0 22863 17651 8242 27 4 0 0 syz-executor1 [22867] 0 22867 17684 9222 26 3 0 0 syz-executor4 [22885] 0 22885 17585 8201 25 3 0 0 syz-executor4 [22904] 0 22904 17684 8240 26 4 0 0 syz-executor3 [22929] 0 22929 17618 8203 25 3 0 0 syz-executor4 [23310] 0 23310 17684 8239 26 4 0 0 syz-executor0 [23548] 0 23548 17618 8233 25 4 0 0 syz-executor4 [23549] 0 23549 17618 8233 25 4 0 0 syz-executor4 [23585] 0 23585 3649 42 13 3 0 0 getty [23621] 0 23621 17585 8201 24 3 0 0 syz-executor4 [23634] 0 23634 17618 8204 24 3 0 0 syz-executor4 [23695] 0 23693 17651 8221 25 4 0 0 syz-executor4 [23702] 0 23702 17552 8096 22 3 0 0 syz-executor2 Out of memory: Kill process 20993 (syz-executor4) score 1007 or sacrifice child Killed process 20993 (syz-executor4) total-vm:70604kB, anon-rss:18196kB, file-rss:32640kB, shmem-rss:0kB oom_reaper: reaped process 20993 (syz-executor4), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB audit: type=1400 audit(2000000673.036:82969): avc: denied { search } for pid=1841 comm="syz-executor2" name="/" dev="sysfs" ino=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:netcontrol_device_t:s0 tclass=dir permissive=1 oom_reaper: reaped process 23695 (syz-executor4), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB udevd invoked oom-killer: gfp_mask=0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null), order=0, oom_score_adj=-1000 syz-executor4 D29784 23696 1842 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __lock_sock+0x11d/0x210 net/core/sock.c:2237 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 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457669 RSP: 002b:00007fb3e723ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000072bfa0 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 00007fb3e723b6d4 R13: 00000000004c4e83 R14: 00000000004d8f00 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by init/1: #0: (pcpu_drain_mutex){+.+.}, at: [] drain_all_pages+0x4a/0x550 mm/page_alloc.c:2505 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 3 locks held by rs:main Q:Reg/1624: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 #1: (sb_writers#4){.+.+}, at: [] file_start_write include/linux/fs.h:2726 [inline] #1: (sb_writers#4){.+.+}, at: [] vfs_write+0x3d7/0x4d0 fs/read_write.c:545 #2: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_trylock include/linux/fs.h:735 [inline] #2: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_file_write_iter+0x1b9/0xe20 fs/ext4/file.c:230 1 lock held by rsyslogd/1626: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1754: #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-fuzzer/27951: #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 5 locks held by kworker/u4:25/32634: #0: ("writeback"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 #2: (&type->s_umount_key#34){++++}, at: [] trylock_super+0x1a/0xe0 fs/super.c:402 #3: (&sbi->s_journal_flag_rwsem){.+.+}, at: [] do_writepages+0xe0/0x270 mm/page-writeback.c:2341 #4: (&ei->i_data_sem){++++}, at: [] ext4_map_blocks+0x67a/0x1560 fs/ext4/inode.c:629 1 lock held by syz-executor4/23695: #0: (sk_lock-AF_PACKET){+.+.}, at: [] lock_sock include/net/sock.h:1452 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.88+ #23 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: NMI backtrace for cpu 0 CPU: 0 PID: 20771 Comm: udevd Not tainted 4.14.88+ #23 task: ffff8880a70daf00 task.stack: ffff88800d210000 RIP: 0010:io_serial_in+0x60/0x80 drivers/tty/serial/8250/8250_port.c:450 RSP: 0018:ffff88800d217498 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff97927c58 RBP: ffffffff97927c20 R08: 000000000000280e R09: ffffffff96ae0850 R10: ffff8880a70db7d0 R11: 0000000000000001 R12: 0000000000000020 R13: fffffbfff2f24fca R14: fffffbfff2f24f8d R15: ffffffff97927e52 FS: 00007f0777d507a0(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000040934c CR3: 00000000b286c005 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: serial_in drivers/tty/serial/8250/8250.h:115 [inline] wait_for_xmitr+0x90/0x1e0 drivers/tty/serial/8250/8250_port.c:2032 serial8250_console_putchar+0x19/0x50 drivers/tty/serial/8250/8250_port.c:3184 uart_console_write+0x4b/0xd0 drivers/tty/serial/serial_core.c:1883 serial8250_console_write+0x51b/0x800 drivers/tty/serial/8250/8250_port.c:3250 call_console_drivers kernel/printk/printk.c:1579 [inline] console_unlock+0x5b9/0xb50 kernel/printk/printk.c:2241 vprintk_emit+0x142/0x180 kernel/printk/printk.c:1777 vprintk_func+0x58/0x159 kernel/printk/printk_safe.c:401 printk+0xa7/0xcf kernel/printk/printk.c:1850 dump_header+0x178/0x7a8 mm/oom_kill.c:416 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: ffffffea:0x7fff05c9ab90 RSP: 1f05030:00007fff05c9b430 EFLAGS: 01f1d1a0 Code: 30 0f b6 8d d1 00 00 00 48 8d 7d 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 13 03 5d 38 89 da ec <0f> b6 c0 5b 5d c3 e8 75 53 7c ff eb c9 e8 9e 53 7c ff eb e6 66