INFO: task systemd-udevd:29746 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26672 pid:29746 ppid: 4848 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 io_schedule+0xba/0x130 kernel/sched/core.c:7215 wait_on_page_bit_common+0x571/0xe90 mm/filemap.c:1301 wait_on_page_bit mm/filemap.c:1362 [inline] wait_on_page_locked include/linux/pagemap.h:688 [inline] wait_on_page_read mm/filemap.c:3312 [inline] do_read_cache_page+0x95c/0x1390 mm/filemap.c:3355 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0x146/0x620 block/partitions/core.c:672 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:148 [inline] blk_add_partitions+0x585/0xe00 block/partitions/core.c:609 bdev_disk_changed+0x244/0x4d0 fs/block_dev.c:1271 __blkdev_get+0x86c/0xa30 fs/block_dev.c:1353 blkdev_get_by_dev fs/block_dev.c:1453 [inline] blkdev_get_by_dev+0x200/0x660 fs/block_dev.c:1425 blkdev_open+0x154/0x2b0 fs/block_dev.c:1548 do_dentry_open+0x4b9/0x11b0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c0e/0x27e0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1187 do_sys_open fs/open.c:1203 [inline] __do_sys_open fs/open.c:1211 [inline] __se_sys_open fs/open.c:1207 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1207 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f065a283840 RSP: 002b:00007ffe56483858 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055dfc81b1910 RCX: 00007f065a283840 RDX: 000055dfc7d3bfe3 RSI: 0000000000080000 RDI: 000055dfc81b6970 RBP: 0000000000000001 R08: 000055dfc7d3b670 R09: 0000000000000110 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055dfc81bb720 R15: 00000000ffffffff INFO: task syz-executor.1:29929 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28352 pid:29929 ppid: 8451 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 blkdev_put+0x59/0x580 fs/block_dev.c:1597 blkdev_close+0x8c/0xb0 fs/block_dev.c:1646 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x272/0x280 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193eb RSP: 002b:00007ffd8373f4a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00000000004193eb RDX: 0000001b2be247c0 RSI: ffffffff8917ba36 RDI: 0000000000000006 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2be23910 R10: 0000000000000b49 R11: 0000000000000293 R12: 000000000056cb00 R13: 000000000056cb00 R14: 000000000056bf80 R15: 00000000000ff951 INFO: task syz-executor.1:29934 blocked for more than 144 seconds. Not tainted 5.13.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28488 pid:29934 ppid: 8451 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 blkdev_put+0x59/0x580 fs/block_dev.c:1597 blkdev_close+0x8c/0xb0 fs/block_dev.c:1646 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x272/0x280 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007ff87bc81188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd8373f43f R14: 00007ff87bc81300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1633: #0: ffffffff8bf767e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by in:imklog/8123: #0: ffff8880145d7d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 1 lock held by systemd-udevd/29746: #0: ffff888145d010e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1452 [inline] #0: ffff888145d010e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x1f6/0x660 fs/block_dev.c:1425 1 lock held by syz-executor.1/29929: #0: ffff888145d010e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x59/0x580 fs/block_dev.c:1597 1 lock held by syz-executor.1/29934: #0: ffff888145d010e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x59/0x580 fs/block_dev.c:1597 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1633 Comm: khungtaskd Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4841 Comm: systemd-journal Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:stackdepot_memcmp lib/stackdepot.c:195 [inline] RIP: 0010:find_stack lib/stackdepot.c:211 [inline] RIP: 0010:stack_depot_save+0x13e/0x4e0 lib/stackdepot.c:281 Code: 37 4d 85 f6 75 11 e9 94 00 00 00 4d 8b 36 4d 85 f6 0f 84 88 00 00 00 41 39 5e 08 75 ee 45 3b 66 0c 75 e8 31 c0 49 8b 4c c6 18 <48> 39 4c c5 00 75 da 48 83 c0 01 49 39 c5 75 eb 48 8b 7c 24 28 48 RSP: 0018:ffffc9000aac7b10 EFLAGS: 00000206 RAX: 0000000000000003 RBX: 00000000c64b5939 RCX: ffffffff83934c04 RDX: 00000000000b5939 RSI: 0000000000400dc0 RDI: 00000000efce4642 RBP: ffffc9000aac7b80 R08: 00000000d3be2a78 R09: 0000000000000001 R10: fffff52001558f56 R11: 0000000000084087 R12: 0000000000000008 R13: 0000000000000008 R14: ffff888023aa00d0 R15: ffff88823b5ac9c8 FS: 00007f391b36e8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3918bbb000 CR3: 000000001ba77000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_save_stack+0x32/0x40 mm/kasan/common.c:40 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] ____kasan_kmalloc mm/kasan/common.c:507 [inline] ____kasan_kmalloc mm/kasan/common.c:466 [inline] __kasan_kmalloc+0x98/0xc0 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:246 [inline] __do_kmalloc mm/slab.c:3702 [inline] __kmalloc+0x22a/0x4d0 mm/slab.c:3711 lsm_cred_alloc security/security.c:536 [inline] security_prepare_creds+0x104/0x180 security/security.c:1690 prepare_creds+0x509/0x730 kernel/cred.c:285 access_override_creds fs/open.c:355 [inline] do_faccessat+0x3f4/0x850 fs/open.c:419 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f391a6299c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff30b90468 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007fff30b93380 RCX: 00007f391a6299c7 RDX: 00007f391b09aa00 RSI: 0000000000000000 RDI: 000055f9905559a3 RBP: 00007fff30b904a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fff30b93380 R15: 00007fff30b90990