INFO: t
INFO: task udevd:5612 blocked in I/O wait for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:0 pid:5612 tgid:5612 ppid:4302 task_flags:0x400140 flags:0x00800019
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
io_schedule+0x1c/0xe0 kernel/sched/core.c:8109
folio_wait_bit_common+0x674/0x9ec mm/filemap.c:1324
folio_put_wait_locked mm/filemap.c:1493 [inline]
do_read_cache_folio+0x240/0x5b8 mm/filemap.c:4089
read_cache_folio+0x68/0x84 mm/filemap.c:4139
read_mapping_folio include/linux/pagemap.h:1017 [inline]
read_part_sector+0xcc/0x6e8 block/partitions/core.c:724
adfspart_check_POWERTEC+0x98/0x5ac block/partitions/acorn.c:450
check_partition block/partitions/core.c:143 [inline]
blk_add_partitions block/partitions/core.c:591 [inline]
bdev_disk_changed+0x6fc/0x11c8 block/partitions/core.c:695
blkdev_get_whole+0x15c/0x240 block/bdev.c:756
bdev_open+0x2d8/0x8cc block/bdev.c:965
blkdev_open+0x2d8/0x404 block/fops.c:697
do_dentry_open+0x5c8/0x10dc fs/open.c:947
vfs_open+0x44/0x2d4 fs/open.c:1079
do_open fs/namei.c:4699 [inline]
path_openat+0x2234/0x2a6c fs/namei.c:4858
do_file_open+0x1c4/0x2e4 fs/namei.c:4887
do_sys_openat2+0x114/0x1e8 fs/open.c:1364
do_sys_open+0xac/0xdc fs/open.c:1370
__do_sys_openat fs/open.c:1386 [inline]
__se_sys_openat fs/open.c:1381 [inline]
__arm64_sys_openat+0x9c/0xb8 fs/open.c:1381
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: __ll_sc_atomic64_fetch_or arch/arm64/include/asm/atomic_ll_sc.h:-1 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_atomic64_fetch_or arch/arm64/include/asm/atomic.h:86 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic64_fetch_or include/linux/atomic/atomic-arch-fallback.h:3816 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic_long_fetch_or include/linux/atomic/atomic-long.h:1090 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_test_and_set_bit include/asm-generic/bitops/atomic.h:42 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x0/0x44 kernel/sched/sched.h:3869
2 locks held by pr/ttyAMA-1/41:
3 locks held by kworker/u8:7/3495:
2 locks held by getty/4451:
#0: ffff0000ca42d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80009228b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211
2 locks held by kworker/1:6/4790:
1 lock held by udevd/5612:
#0: ffff0000c7d97350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0x8cc block/bdev.c:953
1 lock held by syz.5.811/7982:
#0: ffff0000c7d97350 (&disk->open_mutex){+.+.}-{4:4}, at: sync_bdevs+0x210/0x3dc block/bdev.c:1296
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