INFO: task systemd-udevd:10320 blocked for more than 143 seconds. Not tainted 5.7.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D25456 10320 4110 0x00000100 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 __blkdev_get+0x179/0x1530 fs/block_dev.c:1600 blkdev_get+0x41/0x2b0 fs/block_dev.c:1748 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1887 do_dentry_open+0x4ba/0x1290 fs/open.c:797 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1148 do_sys_open+0xc3/0x140 fs/open.c:1164 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f965db74840 Code: Bad RIP value. RSP: 002b:00007ffd27e29338 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005601dafddd40 RCX: 00007f965db74840 RDX: 00005601daeecfe3 RSI: 00000000000a0800 RDI: 00005601dafc9ed0 RBP: 00007ffd27e294b0 R08: 00005601daeec670 R09: 0000000000000010 R10: 00005601daeecd0c R11: 0000000000000246 R12: 00007ffd27e29400 R13: 00005601dafd4470 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.5:23850 blocked for more than 143 seconds. Not tainted 5.7.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D26160 23850 7629 0x00004004 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4158 io_schedule+0x17/0x60 kernel/sched/core.c:5801 wait_on_page_bit_common+0x351/0xdb0 mm/filemap.c:1153 wait_on_page_bit mm/filemap.c:1202 [inline] wait_on_page_locked include/linux/pagemap.h:528 [inline] wait_on_page_read mm/filemap.c:2732 [inline] do_read_cache_page+0xf95/0x1810 mm/filemap.c:2775 read_mapping_page include/linux/pagemap.h:397 [inline] read_part_sector+0xf6/0x600 block/partitions/core.c:643 adfspart_check_ICS+0x9d/0xc80 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x474/0xe50 block/partitions/core.c:571 bdev_disk_changed+0x1fb/0x380 fs/block_dev.c:1543 __blkdev_get+0x130c/0x1530 fs/block_dev.c:1681 blkdev_get+0x41/0x2b0 fs/block_dev.c:1748 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1887 do_dentry_open+0x4ba/0x1290 fs/open.c:797 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1148 do_sys_open+0xc3/0x140 fs/open.c:1164 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x416621 Code: Bad RIP value. RSP: 002b:00007f64a334d7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416621 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f64a334d850 RBP: 000000000078bf00 R08: 00007f64a334d7b0 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce39d R15: 00007f64a334e6d4 INFO: task syz-executor.5:23856 blocked for more than 144 seconds. Not tainted 5.7.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27184 23856 7629 0x00004004 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1938 blkdev_close+0x8c/0xb0 fs/block_dev.c:1987 __fput+0x33e/0x880 fs/file_table.c:280 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: Bad RIP value. RSP: 002b:00007f64a332cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00000000004e8e20 RCX: 000000000045c829 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000409 R14: 00000000004c6a64 R15: 00007f64a332d6d4 INFO: task syz-executor.5:23879 blocked for more than 144 seconds. Not tainted 5.7.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28400 23879 7629 0x00000004 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 __blkdev_get+0x179/0x1530 fs/block_dev.c:1600 blkdev_get+0x41/0x2b0 fs/block_dev.c:1748 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1887 do_dentry_open+0x4ba/0x1290 fs/open.c:797 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1148 do_sys_open+0xc3/0x140 fs/open.c:1164 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x416621 Code: Bad RIP value. RSP: 002b:00007f64a330b7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416621 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f64a330b850 RBP: 000000000078c040 R08: 000000000000000f R09: 0000000000000000 R10: 00007f64a330c9d0 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce39d R15: 00007f64a330c6d4 Showing all locks held in the system: 1 lock held by khungtaskd/1132: #0: ffffffff899bebc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/6717: #0: ffff88809e076670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 1 lock held by systemd-udevd/10320: #0: ffff888088d51840 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1600 1 lock held by syz-executor.5/23850: #0: ffff888088d51840 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1600 1 lock held by syz-executor.5/23856: #0: ffff888088d51840 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1938 1 lock held by syz-executor.5/23879: #0: ffff888088d51840 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1600 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1132 Comm: khungtaskd Not tainted 5.7.0-rc4-syzkaller #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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4106 Comm: systemd-journal Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:651 [inline] RIP: 0010:avc_has_perm_noaudit+0x2fe/0x520 security/selinux/avc.c:1156 Code: 84 d2 0f 85 e4 01 00 00 41 8b 1e 31 ff 45 31 ff f7 d3 23 5c 24 18 89 de e8 3f 1a 1f fe 85 db 0f 85 94 01 00 00 e8 c2 18 1f fe ed 98 0b fe 31 ff 89 c3 89 c6 e8 22 1a 1f fe 85 db 0f 85 02 01 RSP: 0018:ffffc90001657788 EFLAGS: 00000293 RAX: ffff8880a7b7c000 RBX: 0000000000000000 RCX: ffffffff835415e1 RDX: 0000000000000000 RSI: ffffffff835415ee RDI: 0000000000000005 RBP: 0000000000000001 R08: ffff8880a7b7c000 R09: fffff520002caf1b R10: 0000000000000003 R11: fffff520002caf1a R12: 0000000000000005 R13: ffffffff8c80b660 R14: ffffc900016578c0 R15: 0000000000000000 FS: 00007f2f19cc78c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2f17287000 CR3: 00000000a71ba000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: selinux_inode_permission+0x3aa/0x610 security/selinux/hooks.c:3051 security_inode_permission+0xae/0xf0 security/security.c:1253 inode_permission+0x113/0x500 fs/namei.c:457 may_lookup fs/namei.c:1555 [inline] link_path_walk.part.0+0x1e0/0xb50 fs/namei.c:2111 link_path_walk fs/namei.c:2098 [inline] path_openat+0x25a/0x27d0 fs/namei.c:3342 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1148 do_sys_open+0xc3/0x140 fs/open.c:1164 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f2f19257840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffed08d7f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffed08d8290 RCX: 00007f2f19257840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000556faf67f700 RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000556faf673060 R14: 00007ffed08d8250 R15: 0000556faf67f520