INFO: task systemd-udevd:11664 blocked for more than 143 seconds. Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:27192 pid:11664 ppid: 2987 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4711 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5966 schedule+0xd3/0x270 kernel/sched/core.c:6045 io_schedule+0xba/0x130 kernel/sched/core.c:8035 folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1365 folio_wait_bit mm/filemap.c:1425 [inline] folio_wait_locked include/linux/pagemap.h:802 [inline] folio_wait_locked include/linux/pagemap.h:799 [inline] wait_on_page_locked include/linux/pagemap.h:814 [inline] wait_on_page_read mm/filemap.c:3429 [inline] do_read_cache_page+0x988/0x11a0 mm/filemap.c:3472 read_mapping_page include/linux/pagemap.h:602 [inline] read_part_sector+0xfa/0x5c0 block/partitions/core.c:727 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions block/partitions/core.c:612 [inline] bdev_disk_changed+0x7bc/0x1140 block/partitions/core.c:698 blkdev_get_whole+0x206/0x2a0 fs/block_dev.c:1086 blkdev_get_by_dev.part.0+0x354/0xb60 fs/block_dev.c:1228 blkdev_get_by_dev fs/block_dev.c:1317 [inline] blkdev_open+0x295/0x300 fs/block_dev.c:1323 do_dentry_open+0x4c8/0x11d0 fs/open.c:826 do_open fs/namei.c:3405 [inline] path_openat+0x1c9a/0x2880 fs/namei.c:3538 do_filp_open+0x1aa/0x400 fs/namei.c:3565 do_sys_openat2+0x16d/0x4d0 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_open fs/open.c:1228 [inline] __se_sys_open fs/open.c:1224 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fcf740c2840 RSP: 002b:00007ffdcc000488 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005643f66a4820 RCX: 00007fcf740c2840 RDX: 00005643f46f9fe3 RSI: 00000000000a0800 RDI: 00005643f66a3ef0 RBP: 00007ffdcc000600 R08: 00005643f46f9670 R09: 0000000000000010 R10: 00005643f46f9d0c R11: 0000000000000246 R12: 00007ffdcc000550 R13: 00005643f66a3d10 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.4:11849 can't die for more than 143 seconds. task:syz-executor.4 state:D stack:28440 pid:11849 ppid: 6612 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4711 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5966 schedule+0xd3/0x270 kernel/sched/core.c:6045 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6104 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 blkdev_get_by_dev.part.0+0x9b/0xb60 fs/block_dev.c:1221 blkdev_get_by_dev fs/block_dev.c:1317 [inline] blkdev_open+0x295/0x300 fs/block_dev.c:1323 do_dentry_open+0x4c8/0x11d0 fs/open.c:826 do_open fs/namei.c:3405 [inline] path_openat+0x1c9a/0x2880 fs/namei.c:3538 do_filp_open+0x1aa/0x400 fs/namei.c:3565 do_sys_openat2+0x16d/0x4d0 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_openat fs/open.c:1236 [inline] __se_sys_openat fs/open.c:1231 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1231 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4196d4 RSP: 002b:00007f51f190bcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004196d4 RDX: 0000000000000000 RSI: 00007f51f190bd60 RDI: 00000000ffffff9c RBP: 00007f51f190bd60 R08: 0000000000000000 R09: 002364626e2f7665 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ffd0069b33f R14: 00007f51f190c300 R15: 0000000000022000 INFO: task syz-executor.4:11849 blocked for more than 144 seconds. Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28440 pid:11849 ppid: 6612 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4711 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5966 schedule+0xd3/0x270 kernel/sched/core.c:6045 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6104 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 blkdev_get_by_dev.part.0+0x9b/0xb60 fs/block_dev.c:1221 blkdev_get_by_dev fs/block_dev.c:1317 [inline] blkdev_open+0x295/0x300 fs/block_dev.c:1323 do_dentry_open+0x4c8/0x11d0 fs/open.c:826 do_open fs/namei.c:3405 [inline] path_openat+0x1c9a/0x2880 fs/namei.c:3538 do_filp_open+0x1aa/0x400 fs/namei.c:3565 do_sys_openat2+0x16d/0x4d0 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_openat fs/open.c:1236 [inline] __se_sys_openat fs/open.c:1231 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1231 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4196d4 RSP: 002b:00007f51f190bcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004196d4 RDX: 0000000000000000 RSI: 00007f51f190bd60 RDI: 00000000ffffff9c RBP: 00007f51f190bd60 R08: 0000000000000000 R09: 002364626e2f7665 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ffd0069b33f R14: 00007f51f190c300 R15: 0000000000022000 INFO: task syz-executor.4:11858 blocked for more than 144 seconds. Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28816 pid:11858 ppid: 11849 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4711 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5966 schedule+0xd3/0x270 kernel/sched/core.c:6045 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6104 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096 blkdev_put+0x97/0x9e0 fs/block_dev.c:1345 blkdev_close+0x8c/0xb0 fs/block_dev.c:1397 __fput+0x288/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xbae/0x2a30 kernel/exit.c:825 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2846 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f51f18eb218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056c040 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056c040 RBP: 000000000056c038 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c044 R13: 00007ffd0069b33f R14: 00007f51f18eb300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xcb7/0xed0 kernel/hung_task.c:339 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:kasan_check_range+0x16/0x180 mm/kasan/generic.c:188 Code: 02 0f 1f 00 48 89 f2 be f8 00 00 00 e9 e3 d9 39 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 <53> 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 RSP: 0018:ffffc90000cd7c68 EFLAGS: 00000282 RAX: dffffc0000000000 RBX: ffff8880b9c32a48 RCX: ffffffff81619484 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b9c32a48 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880b9c32a4c R10: ffffffff88cd900d R11: 0000000000000000 R12: ffffc90000cd7db0 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000139 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc09d62e000 CR3: 0000000024c2b000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline] rcu_is_watching+0x54/0xc0 kernel/rcu/tree.c:1121 rcu_read_unlock include/linux/rcupdate.h:716 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x73c/0xe50 net/batman-adv/network-coding.c:715 process_one_work+0x98d/0x1630 kernel/workqueue.c:2275 worker_thread+0x658/0x11f0 kernel/workqueue.c:2421 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0f 1f 00 nopl (%rax) 3: 48 89 f2 mov %rsi,%rdx 6: be f8 00 00 00 mov $0xf8,%esi b: e9 e3 d9 39 02 jmpq 0x239d9f3 10: 0f 1f 00 nopl (%rax) 13: 48 85 f6 test %rsi,%rsi 16: 0f 84 70 01 00 00 je 0x18c 1c: 49 89 f9 mov %rdi,%r9 1f: 41 54 push %r12 21: 44 0f b6 c2 movzbl %dl,%r8d 25: 49 01 f1 add %rsi,%r9 28: 55 push %rbp 29: 53 push %rbx <-- trapping instruction 2a: 0f 82 18 01 00 00 jb 0x148 30: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax 37: 7f ff ff 3a: 48 39 c7 cmp %rax,%rdi 3d: 0f .byte 0xf 3e: 86 .byte 0x86