INFO: task syz-fuzzer:5086 blocked for more than 143 seconds.
Not tainted 6.10.0-rc3-next-20240611-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-fuzzer state:D stack:24352 pid:5086 tgid:5082 ppid:5080 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:795 [inline]
vfs_unlink+0xe4/0x650 fs/namei.c:4343
do_unlinkat+0x4ae/0x830 fs/namei.c:4418
__do_sys_unlinkat fs/namei.c:4461 [inline]
__se_sys_unlinkat fs/namei.c:4454 [inline]
__x64_sys_unlinkat+0xcc/0xf0 fs/namei.c:4454
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x40720e
RSP: 002b:000000c0009b5588 EFLAGS: 00000206 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 000000000000001c RCX: 000000000040720e
RDX: 0000000000000000 RSI: 000000c000c830b0 RDI: 000000000000001c
RBP: 000000c0009b55c8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000010b
R13: 000000c000372c00 R14: 000000c0007a44e0 R15: 000000c000160580
Showing all locks held in the system:
1 lock held by rcu_exp_gp_kthr/19:
#0: ffff8880b943e8d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
1 lock held by khungtaskd/30:
#0: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689
2 locks held by getty/4846:
#0: ffff88802ada30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
3 locks held by syz-fuzzer/5086:
#0: ffff88802fb5c420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805d3d49c0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88805d3d49c0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4405
#2: ffff88807fb671a0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
#2: ffff88807fb671a0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4343
3 locks held by syz-fuzzer/5100:
#0: ffff88802fb5c420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805ab917e8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88805ab917e8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4405
#2: ffff88805e7aabd8 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
#2: ffff88805e7aabd8 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4343
1 lock held by syz-executor.2/9167:
#0: ffffffff8e33a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#0: ffffffff8e33a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:959
4 locks held by syz-executor.1/11625:
4 locks held by syz-executor.4/11834:
1 lock held by syz-executor.3/11922:
1 lock held by syz-executor.0/12884:
#0: ffff888020f494c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xe5/0xc60 block/bdev.c:897
1 lock held by syz-executor.3/12986:
#0: ffffffff8e33a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#0: ffffffff8e33a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:959
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc3-next-20240611-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:91 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11 Comm: kworker/u8:0 Not tainted 6.10.0-rc3-next-20240611-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_kcov_mode kernel/kcov.c:175 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207
Code: 24 65 48 8b 0c 25 00 d6 03 00 65 8b 15 00 8e 70 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 74 2c <8b> 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48
RSP: 0018:ffffc900001075b0 EFLAGS: 00000246
RAX: ffffffff8b8737ac RBX: 1ffffffff2535514 RCX: ffff8880172c3c00
RDX: 0000000080000000 RSI: 00000000000000e9 RDI: 000000000000000f
RBP: 00000000000000e9 R08: ffffffff8b873634 R09: 0000000000000000
R10: ffffc90000107920 R11: fffff52000020f2f R12: ffffffff929aa8a2
R13: ffffffff929aa8a0 R14: ffffffff929aa8af R15: ffffc90000107920
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001485538 CR3: 0000000041604000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__insn_get_emulate_prefix arch/x86/lib/insn.c:91 [inline]
insn_get_emulate_prefix arch/x86/lib/insn.c:109 [inline]
insn_get_prefixes+0x3ec/0x1ac0 arch/x86/lib/insn.c:134
insn_get_opcode+0x67/0xe80 arch/x86/lib/insn.c:282
insn_get_modrm+0x63/0x730 arch/x86/lib/insn.c:369
insn_get_sib arch/x86/lib/insn.c:443 [inline]
insn_get_displacement+0x151/0x9a0 arch/x86/lib/insn.c:484
insn_get_immediate+0x62/0x11f0 arch/x86/lib/insn.c:650
insn_get_length arch/x86/lib/insn.c:723 [inline]
insn_decode+0x2d6/0x4c0 arch/x86/lib/insn.c:762
text_poke_loc_init+0xed/0x870 arch/x86/kernel/alternative.c:2383
arch_jump_label_transform_queue+0x8f/0x100 arch/x86/kernel/jump_label.c:138
__jump_label_update+0x177/0x3a0 kernel/jump_label.c:475
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244