INFO: task syz-executor.0:8883 blocked for more than 144 seconds.
Not tainted 5.15.148-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28256 pid: 8883 ppid: 3549 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1047
__down_read_common kernel/locking/rwsem.c:1231 [inline]
__down_read kernel/locking/rwsem.c:1244 [inline]
down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1490
iterate_supers+0xac/0x1e0 fs/super.c:703
ksys_sync+0xb9/0x1c0 fs/sync.c:102
__do_sys_sync+0xa/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd282937da9
RSP: 002b:00007fd280eb80c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fd282a65f80 RCX: 00007fd282937da9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fd28298447a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd282a65f80 R15: 00007ffc2469ef08
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91f220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3262:
#0: ffff88814ad7d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc9000249c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
1 lock held by syz-executor.1/32613:
1 lock held by syz-executor.0/8883:
#0: ffff888077a980e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
2 locks held by kworker/u4:1/9502:
1 lock held by syz-executor.3/9740:
#0: ffff888077a980e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
1 lock held by syz-executor.3/10754:
#0: ffff888077a980e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 32613 Comm: syz-executor.1 Not tainted 5.15.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x32/0x60 kernel/kcov.c:197
Code: f4 41 82 7e 65 8b 15 f5 41 82 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 34 16 00 00 00 74 2c 8b 91 10 16 00 00 <83> fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14
RSP: 0018:ffffc90004e6f6e8 EFLAGS: 00000246
RAX: ffffffff81e508ca RBX: 0000000000000200 RCX: ffff888084f83b80
RDX: 0000000000000002 RSI: 000000000003ffff RDI: ffff888088d02570
RBP: ffffc90004e6f870 R08: dffffc0000000000 R09: fffffbfff1f7a048
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888088d02570
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000035980
FS: 00007fa6956616c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3f3f13030 CR3: 00000000752b8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
touch_buffer+0x1a/0x200 fs/buffer.c:61
__find_get_block+0x2d7/0x1350 fs/buffer.c:1314
sb_find_get_block include/linux/buffer_head.h:374 [inline]
exfat_dir_readahead fs/exfat/dir.c:706 [inline]
exfat_get_dentry+0x4c1/0x970 fs/exfat/dir.c:735
exfat_create_upcase_table+0x258/0xfa0 fs/exfat/nls.c:764
__exfat_fill_super fs/exfat/super.c:588 [inline]
exfat_fill_super+0x1249/0x2d70 fs/exfat/super.c:644
get_tree_bdev+0x3fe/0x620 fs/super.c:1312
vfs_get_tree+0x88/0x270 fs/super.c:1517
do_new_mount+0x2ba/0xb40 fs/namespace.c:3005
do_mount fs/namespace.c:3348 [inline]
__do_sys_mount fs/namespace.c:3556 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa6970e24aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa695660ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa695660f80 RCX: 00007fa6970e24aa
RDX: 00000000200000c0 RSI: 0000000020001540 RDI: 00007fa695660f40
RBP: 00000000200000c0 R08: 00007fa695660f80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020001540
R13: 00007fa695660f40 R14: 00000000000014f5 R15: 0000000020000100