audit: type=1800 audit(1571479705.092:357): pid=3583 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed comm="syz-executor.4" name="bus" dev="sda1" ino=16688 res=0 audit: type=1800 audit(1571479705.122:358): pid=3586 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed comm="syz-executor.4" name="bus" dev="sda1" ino=16688 res=0 INFO: task syz-executor.5:3555 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28040 3555 7988 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 request_wait_answer+0x42f/0x7c0 fs/fuse/dev.c:485 __fuse_request_send+0x128/0x1d0 fs/fuse/dev.c:505 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:518 fuse_simple_request+0x2f6/0x720 fs/fuse/dev.c:576 fuse_lookup_name+0x275/0x670 fs/fuse/dir.c:323 fuse_lookup+0xeb/0x3e0 fs/fuse/dir.c:361 __lookup_slow+0x279/0x500 fs/namei.c:1671 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2348 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0xae/0x1b0 fs/xattr.c:464 __do_sys_setxattr fs/xattr.c:484 [inline] __se_sys_setxattr fs/xattr.c:480 [inline] __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a59 Code: Bad RIP value. RSP: 002b:00007fa80a732c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 8e56b071b577b247 R11: 0000000000000246 R12: 00007fa80a7336d4 R13: 00000000004d0e28 R14: 00000000004df908 R15: 00000000ffffffff INFO: task syz-executor.5:3558 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28040 3558 7988 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 d_wait_lookup fs/dcache.c:2428 [inline] d_alloc_parallel+0x11c9/0x1bb0 fs/dcache.c:2510 __lookup_slow+0x1ab/0x500 fs/namei.c:1654 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 link_path_walk.part.0+0x980/0x1330 fs/namei.c:2141 link_path_walk fs/namei.c:2269 [inline] path_lookupat.isra.0+0xe3/0x8d0 fs/namei.c:2317 filename_lookup+0x1b0/0x410 fs/namei.c:2348 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] do_fchmodat+0x9c/0x150 fs/open.c:596 __do_sys_chmod fs/open.c:616 [inline] __se_sys_chmod fs/open.c:614 [inline] __x64_sys_chmod+0x5c/0x80 fs/open.c:614 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a59 Code: Bad RIP value. RSP: 002b:00007fa80a711c78 EFLAGS: 00000246 ORIG_RAX: 000000000000005a RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459a59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa80a7126d4 R13: 00000000004bf6cb R14: 00000000004d2150 R15: 00000000ffffffff INFO: task syz-executor.5:3572 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28568 3572 7988 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 d_wait_lookup fs/dcache.c:2428 [inline] d_alloc_parallel+0x11c9/0x1bb0 fs/dcache.c:2510 __lookup_slow+0x1ab/0x500 fs/namei.c:1654 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2348 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] do_sys_truncate.part.0+0x92/0x150 fs/open.c:130 do_sys_truncate fs/open.c:126 [inline] __do_sys_truncate fs/open.c:144 [inline] __se_sys_truncate fs/open.c:142 [inline] __x64_sys_truncate+0x6e/0xa0 fs/open.c:142 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a59 Code: Bad RIP value. RSP: 002b:00007fa80a6cfc78 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459a59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 000000000075c268 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa80a6d06d4 R13: 00000000004c04de R14: 00000000004e0ce8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1037: #0: 0000000043756a46 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 1 lock held by udevd/3585: 1 lock held by rsyslogd/7390: #0: 00000000b3a95590 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 2 locks held by getty/7512: #0: 00000000361c3b36 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000056689b52 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7513: #0: 000000005423a432 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000fdc7cefd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7514: #0: 00000000955bbfc6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000004a131ef5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7515: #0: 00000000a0246fae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000006fbbf26f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7516: #0: 0000000081d4c98f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000000cd17d99 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7517: #0: 0000000049281937 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000008a269346 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7518: #0: 00000000e6034841 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b8b08163 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by syz-executor.5/3555: #0: 00000000af78ee67 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 00000000af78ee67 (&type->i_mutex_dir_key#8){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 00000000020b72f5 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 1 lock held by syz-executor.5/3558: #0: 00000000af78ee67 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 00000000af78ee67 (&type->i_mutex_dir_key#8){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 1 lock held by syz-executor.5/3572: #0: 00000000af78ee67 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 00000000af78ee67 (&type->i_mutex_dir_key#8){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1037 Comm: khungtaskd Not tainted 4.19.80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3585 Comm: udevd Not tainted 4.19.80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:84 [inline] RIP: 0010:pvclock_clocksource_read+0x7c/0x4d0 arch/x86/kernel/pvclock.c:87 Code: e8 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 22 04 00 00 48 8d 43 0f 8b 0b 49 bc 00 00 00 00 00 fc ff df 48 89 45 b0 <48> 8d 43 18 48 89 45 c0 48 8d 43 1b 4c 8d 43 1c 48 89 45 d0 48 8d RSP: 0018:ffff8880960dfbb0 EFLAGS: 00000246 RAX: ffffffff8979a04f RBX: ffffffff8979a040 RCX: 000000000000000a RDX: 0000000000000000 RSI: ffffffff815c6993 RDI: ffffffff8979a040 RBP: ffff8880960dfc38 R08: ffff8880960d24c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff8979a043 R14: dffffc0000000000 R15: 000000000002f86a FS: 00007f95d9e767a0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009600a000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_clock_read+0x18/0x30 arch/x86/kernel/kvmclock.c:103 kvm_clock_get_cycles+0x9/0x10 arch/x86/kernel/kvmclock.c:110 tk_clock_read kernel/time/timekeeping.c:172 [inline] timekeeping_get_delta kernel/time/timekeeping.c:266 [inline] timekeeping_get_ns kernel/time/timekeeping.c:373 [inline] ktime_get_ts64+0x1aa/0x3e0 kernel/time/timekeeping.c:891 ep_set_mstimeout fs/eventpoll.c:1724 [inline] ep_poll+0x437/0xd10 fs/eventpoll.c:1756 do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2198 __do_sys_epoll_wait fs/eventpoll.c:2208 [inline] __se_sys_epoll_wait fs/eventpoll.c:2205 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f95d958a943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007fff1f078a88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f95d958a943 RDX: 0000000000000008 RSI: 00007fff1f078b80 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000020b9740 R15: 0000000002070030