[ 5916] 0 5916 18179 8974 27 4 0 0 syz-executor.2 [ 5922] 0 5922 18179 8974 27 4 0 0 syz-executor.2 [ 5923] 0 5923 18179 8974 27 4 0 1000 syz-executor.5 [ 5963] 0 5963 18113 8746 26 3 0 0 syz-executor.4 [ 6000] 0 6000 18113 8971 28 4 0 0 syz-executor.2 INFO: task syz-executor.3:15021 blocked for more than 140 seconds. Not tainted 4.14.98+ #7 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 6025] 0 6025 18146 8748 26 3 0 0 syz-executor.4 syz-executor.3 D29840 15021 1849 0x00000004 Call Trace: [ 6054] 0 6054 18113 8746 26 3 0 0 syz-executor.0 [ 6058] 0 6058 18179 8750 26 3 0 0 syz-executor.0 schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [ 6067] 0 6067 18113 8743 25 3 0 1000 syz-executor.5 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 [ 6075] 0 6075 18146 8745 26 3 0 1000 syz-executor.5 [ 6111] 0 6111 18179 8974 27 4 0 1000 syz-executor.5 [ 6142] 0 6142 18146 13266 32 3 0 0 syz-executor.4 lock_sock include/net/sock.h:1456 [inline] packet_setsockopt+0x6bb/0x2830 net/packet/af_packet.c:3765 [ 6147] 0 6147 18179 8992 26 4 0 0 syz-executor.0 [ 6188] 0 6188 18146 13266 32 3 0 0 syz-executor.4 [ 6239] 0 6239 18146 13266 32 3 0 0 syz-executor.4 INFO: task syz-executor.3:15024 blocked for more than 140 seconds. [ 6321] 0 6321 18146 13266 32 3 0 0 syz-executor.4 [ 6335] 0 6335 18212 8976 28 4 0 1000 syz-executor.5 Not tainted 4.14.98+ #7 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 6428] 0 6428 18146 13266 32 3 0 0 syz-executor.4 syz-executor.3 D29440 15024 1849 0x00000004 Call Trace: [ 6455] 0 6455 18113 8744 25 3 0 0 syz-executor.3 schedule+0x92/0x1c0 kernel/sched/core.c:3490 [ 6486] 0 6486 18146 13266 32 3 0 0 syz-executor.4 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [ 6528] 0 6528 18146 13266 32 3 0 0 syz-executor.4 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 lock_sock include/net/sock.h:1456 [inline] packet_setsockopt+0x6bb/0x2830 net/packet/af_packet.c:3765 [ 6576] 0 6576 18113 8987 26 4 0 0 syz-executor.0 [ 6586] 0 6586 18146 13266 32 3 0 0 syz-executor.4 [ 6624] 0 6624 18113 8744 25 3 0 1000 syz-executor.5 [ 6626] 0 6626 18146 8748 26 3 0 1000 syz-executor.5 [ 6643] 0 6643 18146 13266 32 3 0 0 syz-executor.4 Showing all locks held in the system: [ 6702] 0 6702 18146 13266 32 3 0 0 syz-executor.4 2 locks held by init/1: #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:6184 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 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:6184 2 locks held by cron/1667: #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:6184 2 locks held by getty/1751: #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 2 locks held by syz-fuzzer/27250: #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:6184 1 lock held by syz-executor.1/26892: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x51/0x110 fs/exec.c:1389 ============================================= [ 6755] 0 6755 18146 13266 32 3 0 0 syz-executor.4 [ 6768] 0 6768 18113 8985 26 4 0 0 syz-executor.0 [ 6817] 0 6817 18146 13266 32 3 0 0 syz-executor.4 [ 6861] 0 6861 18146 13266 32 3 0 0 syz-executor.4 [ 6928] 0 6928 18146 13266 32 3 0 0 syz-executor.4 [ 6969] 0 6969 18113 8967 27 4 0 0 syz-executor.2 [ 6975] 0 6975 18146 13266 32 3 0 0 syz-executor.4 [ 6977] 0 6977 18110 8744 27 3 0 0 syz-executor.2 NMI backtrace for cpu 0 [ 6981] 0 6981 18143 8747 27 3 0 0 syz-executor.2 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.98+ #7 [ 7003] 0 7003 18113 8741 24 3 0 0 syz-executor.3 Call Trace: [ 7034] 0 7034 18146 13266 32 3 0 0 syz-executor.4 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 [ 7037] 0 7037 18146 13235 32 3 0 0 syz-executor.3 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 [ 7050] 0 7050 18146 13266 32 3 0 0 syz-executor.4 [ 7074] 0 7074 18146 8969 27 4 0 1000 syz-executor.5 [ 7076] 0 7076 18146 8969 27 4 0 1000 syz-executor.5 [ 7080] 0 7080 18146 8969 27 4 0 1000 syz-executor.5 [ 7121] 0 7121 18146 13266 32 3 0 0 syz-executor.4 [ 7190] 0 7190 18146 13266 32 3 0 0 syz-executor.4 Sending NMI from CPU 0 to CPUs 1: [ 7266] 0 7266 18146 13266 32 3 0 0 syz-executor.4 NMI backtrace for cpu 1 CPU: 1 PID: 1769 Comm: syz-fuzzer Not tainted 4.14.98+ #7 task: ffff8881d1c81780 task.stack: ffff8881d0e38000 RIP: 0010:propagate_entity_load_avg kernel/sched/fair.c:3338 [inline] RIP: 0010:update_load_avg kernel/sched/fair.c:3506 [inline] RIP: 0010:enqueue_entity kernel/sched/fair.c:3979 [inline] RIP: 0010:enqueue_task_fair+0x343/0x66e0 kernel/sched/fair.c:5250 RSP: 0000:ffff8881dbb07b50 EFLAGS: 00000046 RAX: 1ffff1103a85e90b RBX: dffffc0000000000 RCX: ffff8881dbb2a2a0 RDX: 0000000000000000 RSI: ffff8881dbb2a2a0 RDI: ffff8881dbb2a310 RBP: ffff8881d42f4850 R08: ffff8881dbb2a2a0 R09: 0000000000000000 R10: ffff8881d1c820f0 R11: 0000000000000001 R12: ffff8881d42f4880 R13: ffff8881dbb2a378 R14: ffff8881d42f4700 R15: 0000000000000000 FS: 000000000167c7a8(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045ce56 CR3: 00000001d656a001 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: Code: 4d 8b a8 d8 00 00 00 49 8d 85 a0 00 00 00 49 39 c0 0f 84 d0 16 00 00 49 8d 86 58 01 00 00 48 89 44 24 48 48 c1 e8 03 80 3c 18 00 <0f> 85 86 3f 00 00 4d 8b ae 58 01 00 00 4d 85 ed 0f 84 76 0b 00