INFO: task systemd-udevd:9087 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd   D26568  9087   3914 0x00004100
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x82a/0x18e0 kernel/sched/core.c:3880
 schedule+0x8f/0x260 kernel/sched/core.c:3944
 io_schedule+0x1c/0x70 kernel/sched/core.c:5600
 wait_on_page_bit_common mm/filemap.c:1166 [inline]
 wait_on_page_bit+0x357/0x8a0 mm/filemap.c:1215
 wait_on_page_locked include/linux/pagemap.h:517 [inline]
 wait_on_page_read mm/filemap.c:2793 [inline]
 do_read_cache_page+0x36f/0xbf0 mm/filemap.c:2836
 read_cache_page+0x3a/0x60 mm/filemap.c:2920
 read_mapping_page include/linux/pagemap.h:386 [inline]
 read_dev_sector+0x68/0x320 block/partition-generic.c:667
 read_part_sector block/partitions/check.h:38 [inline]
 adfspart_check_ICS+0x109/0xde0 block/partitions/acorn.c:361
 check_partition+0x314/0x5da block/partitions/check.c:167
 rescan_partitions+0x192/0x8b0 block/partition-generic.c:531
 __blkdev_get+0xdc6/0x12e0 fs/block_dev.c:1680
 blkdev_get+0x18e/0x210 fs/block_dev.c:1750
 blkdev_open+0x19f/0x200 fs/block_dev.c:1886
 do_dentry_open+0x3f1/0x1010 fs/open.c:797
 vfs_open+0x9a/0xc0 fs/open.c:906
 do_last fs/namei.c:3416 [inline]
 path_openat+0x89e/0x29c0 fs/namei.c:3533
 do_filp_open+0x177/0x250 fs/namei.c:3563
 do_sys_open+0x1dd/0x3b0 fs/open.c:1089
 __do_sys_open fs/open.c:1107 [inline]
 __se_sys_open fs/open.c:1102 [inline]
 __x64_sys_open+0x79/0xb0 fs/open.c:1102
 do_syscall_64+0xd0/0x540 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fa2a6850840
Code: Bad RIP value.
RSP: 002b:00007fffdffcf1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000564271744410 RCX: 00007fa2a6850840
RDX: 0000564270ecafe3 RSI: 00000000000a0800 RDI: 0000564271736cd0
RBP: 00007fffdffcf340 R08: 0000564270eca670 R09: 0000000000000010
R10: 0000564270ecad0c R11: 0000000000000246 R12: 00007fffdffcf290
R13: 000056427173b4d0 R14: 0000000000000003 R15: 000000000000000e
INFO: task syz-executor.0:30047 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28496 30047   6793 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x82a/0x18e0 kernel/sched/core.c:3880
 schedule+0x8f/0x260 kernel/sched/core.c:3944
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003
 __mutex_lock_common kernel/locking/mutex.c:1007 [inline]
 __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092
 blkdev_put+0x25/0x480 fs/block_dev.c:1927
 blkdev_close+0x88/0xd0 fs/block_dev.c:1976
 __fput+0x25a/0x780 fs/file_table.c:280
 ____fput+0x9/0x10 fs/file_table.c:313
 task_work_run+0x108/0x180 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x1f2/0x2e0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x462/0x540 arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416ec1
Code: Bad RIP value.
RSP: 002b:00007ffdef339010 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000416ec1
RDX: 0000001b2c320000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffdef339100 R11: 0000000000000293 R12: 000000000118d940
R13: 000000000118d940 R14: ffffffffffffffff R15: 000000000118cfec
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 1107 Comm: khungtaskd Not tainted 5.3.0-rc3-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+0x165/0x21a lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.0+0x49/0x86 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x194/0x1bd 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:205 [inline]
 watchdog+0x6a3/0xb60 kernel/hung_task.c:289
 kthread+0x331/0x3f0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.3.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_mcast_mla_update
RIP: 0010:unwind_next_frame.part.5+0x10/0xa60 arch/x86/kernel/unwind_frame.c:260
Code: 81 c4 00 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f4 8d 10 00 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 57 <41> 56 41 55 41 54 4c 8d a5 78 ff ff ff 49 c1 ec 03 53 48 89 fb 49
RSP: 0018:ffff8880a98af710 EFLAGS: 00000202
RAX: dffffc0000000000 RBX: ffff8880a98af740 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff87200184 RDI: ffff8880a98af740
RBP: ffff8880a98af718 R08: 1ffff11015315ef2 R09: ffff8880a98af778
R10: ffff8880a98af6f0 R11: ffff8880a98af79f R12: ffff8880a98af7f8
R13: 0000000000000000 R14: ffff8880a98941c0 R15: ffff8880a2e2e1d7
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff94ed5f000 CR3: 0000000099d09000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 unwind_next_frame+0x35/0x40 arch/x86/kernel/unwind_frame.c:265
 arch_stack_walk+0x84/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x82/0xb0 kernel/stacktrace.c:123
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc.part.0+0x44/0xc0 mm/kasan/common.c:487
 __kasan_kmalloc.constprop.1+0xb1/0xc0 mm/kasan/common.c:468
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:501
 kmem_cache_alloc_trace+0x162/0x410 mm/slab.c:3550
 kmalloc include/linux/slab.h:552 [inline]
 batadv_mcast_mla_softif_get_ipv6 net/batman-adv/multicast.c:477 [inline]
 batadv_mcast_mla_softif_get net/batman-adv/multicast.c:536 [inline]
 __batadv_mcast_mla_update net/batman-adv/multicast.c:911 [inline]
 batadv_mcast_mla_update+0xe94/0x2f80 net/batman-adv/multicast.c:948
 process_one_work+0x7d2/0x1560 kernel/workqueue.c:2269
 worker_thread+0x85/0xb60 kernel/workqueue.c:2415
 kthread+0x331/0x3f0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352