FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.9.0-rc4-next-20240418-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/17763 is trying to acquire lock:
ffffffff8e20f618 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
but task is already holding lock:
ffff8880b943e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
raw_spin_rq_lock kernel/sched/sched.h:1406 [inline]
rq_lock kernel/sched/sched.h:1720 [inline]
task_fork_fair+0x61/0x1e0 kernel/sched/fair.c:12704
sched_cgroup_fork+0x37c/0x410 kernel/sched/core.c:4844
copy_process+0x2217/0x3dc0 kernel/fork.c:2499
kernel_clone+0x226/0x8f0 kernel/fork.c:2797
user_mode_thread+0x132/0x1a0 kernel/fork.c:2875
rest_init+0x23/0x300 init/main.c:708
start_kernel+0x47a/0x500 init/main.c:1099
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4262
up+0x72/0x90 kernel/locking/semaphore.c:191
__up_console_sem kernel/printk/printk.c:340 [inline]
__console_unlock kernel/printk/printk.c:2746 [inline]
console_unlock+0x22f/0x4d0 kernel/printk/printk.c:3065
vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2345
_printk+0xd5/0x120 kernel/printk/printk.c:2370
__ext4_msg+0x2db/0x2f0 fs/ext4/super.c:990
ext4_put_super+0xc5/0xcd0 fs/ext4/super.c:1295
generic_shutdown_super+0x136/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1676
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7305
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
task_work_run+0x24f/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:323
console_trylock kernel/printk/printk.c:2699 [inline]
console_trylock_spinning kernel/printk/printk.c:1955 [inline]
vprintk_emit+0x283/0x770 kernel/printk/printk.c:2344
_printk+0xd5/0x120 kernel/printk/printk.c:2370
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:225 [inline]
bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_78f9c3f13797e2ae+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2392 [inline]
bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2435
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2587/0x4a50 kernel/sched/core.c:6742
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3897 [inline]
slab_alloc_node mm/slub.c:3957 [inline]
kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964
vm_area_alloc+0x24/0x1d0 kernel/fork.c:467
mmap_region+0xc47/0x2060 mm/mmap.c:2873
do_mmap+0x8ad/0xfa0 mm/mmap.c:1397
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock((console_sem).lock);
*** DEADLOCK ***
3 locks held by syz-executor.3/17763:
#0: ffff888066e8ba98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff888066e8ba98 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:571
#1: ffff8880b943e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#2: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#2: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#2: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2391 [inline]
#2: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x244/0x590 kernel/trace/bpf_trace.c:2435
stack backtrace:
CPU: 0 PID: 17763 Comm: syz-executor.3 Not tainted 6.9.0-rc4-next-20240418-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:323
console_trylock kernel/printk/printk.c:2699 [inline]
console_trylock_spinning kernel/printk/printk.c:1955 [inline]
vprintk_emit+0x283/0x770 kernel/printk/printk.c:2344
_printk+0xd5/0x120 kernel/printk/printk.c:2370
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:225 [inline]
bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_78f9c3f13797e2ae+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2392 [inline]
bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2435
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2587/0x4a50 kernel/sched/core.c:6742
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3897 [inline]
slab_alloc_node mm/slub.c:3957 [inline]
kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964
vm_area_alloc+0x24/0x1d0 kernel/fork.c:467
mmap_region+0xc47/0x2060 mm/mmap.c:2873
do_mmap+0x8ad/0xfa0 mm/mmap.c:1397
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f758ac7dee3
Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 b0 ff ff ff 64 c7
RSP: 002b:00007f758ba62ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000639 RCX: 00007f758ac7dee3
RDX: 0000000000000003 RSI: 0000000008400000 RDI: 0000000000000000
RBP: 00000000200002c2 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000007
R13: 00007f758ba62f80 R14: 00007f758ba62f40 R15: 0000000020000900
CPU: 0 PID: 17763 Comm: syz-executor.3 Not tainted 6.9.0-rc4-next-20240418-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
fail_dump lib/fault-inject.c:52 [inline]
should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:225 [inline]
bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_78f9c3f13797e2ae+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2392 [inline]
bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2435
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2587/0x4a50 kernel/sched/core.c:6742
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3897 [inline]
slab_alloc_node mm/slub.c:3957 [inline]
kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964
vm_area_alloc+0x24/0x1d0 kernel/fork.c:467
mmap_region+0xc47/0x2060 mm/mmap.c:2873
do_mmap+0x8ad/0xfa0 mm/mmap.c:1397
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f758ac7dee3
Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 b0 ff ff ff 64 c7
RSP: 002b:00007f758ba62ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000639 RCX: 00007f758ac7dee3
RDX: 0000000000000003 RSI: 0000000008400000 RDI: 0000000000000000
RBP: 00000000200002c2 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000007
R13: 00007f758ba62f80 R14: 00007f758ba62f40 R15: 0000000020000900
loop3: detected capacity change from 0 to 1024