======================================================
WARNING: possible circular locking dependency detected
6.10.0-syzkaller-04559-g7d30b8aa4fc3 #0 Not tainted
------------------------------------------------------
syz.4.441/7485 is trying to acquire lock:
ffff888017e80a18 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
ffff888017e80a18 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
but task is already holding lock:
ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: __mmap_lock_do_trace_released+0x83/0x620 mm/mmap_lock.c:243
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (lock#10){+.+.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
__mmap_lock_do_trace_acquire_returned+0xa8/0x630 mm/mmap_lock.c:237
__mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
mmap_read_trylock include/linux/mmap_lock.h:164 [inline]
stack_map_get_build_id_offset+0x9af/0x9d0 kernel/bpf/stackmap.c:141
__bpf_get_stack+0x4ad/0x5a0 kernel/bpf/stackmap.c:449
____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1997 [inline]
bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1987
0xffffffffa0001fcf
bpf_dispatcher_nop_func include/linux/bpf.h:1252 [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:2406 [inline]
bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2447
trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x7cb/0xae0
context_switch kernel/sched/core.c:5172 [inline]
__schedule+0x1079/0x4a60 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:203
mt_slot lib/maple_tree.c:788 [inline]
mas_next_slot+0xbad/0xf90 lib/maple_tree.c:4689
mas_find+0x950/0xbb0 lib/maple_tree.c:6068
vma_next include/linux/mm.h:986 [inline]
validate_mm+0x3e6/0x530 mm/mmap.c:289
vma_link+0x3d0/0x4f0 mm/mmap.c:420
insert_vm_struct+0x2f7/0x410 mm/mmap.c:3413
__install_special_mapping+0x1b9/0x350 mm/mmap.c:3653
map_vdso+0x17b/0x410 arch/x86/entry/vdso/vma.c:245
load_elf_binary+0x1c75/0x2680 fs/binfmt_elf.c:1271
search_binary_handler fs/exec.c:1821 [inline]
exec_binprm fs/exec.c:1863 [inline]
bprm_execve+0xaf8/0x1770 fs/exec.c:1914
do_execveat_common+0x55f/0x6f0 fs/exec.c:2021
do_execve fs/exec.c:2095 [inline]
__do_sys_execve fs/exec.c:2171 [inline]
__se_sys_execve fs/exec.c:2166 [inline]
__x64_sys_execve+0x92/0xb0 fs/exec.c:2166
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
-> #1 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
raw_spin_rq_lock kernel/sched/sched.h:1415 [inline]
rq_lock kernel/sched/sched.h:1714 [inline]
task_fork_fair+0x61/0x1e0 kernel/sched/fair.c:12710
sched_cgroup_fork+0x37c/0x410 kernel/sched/core.c:4633
copy_process+0x2217/0x3dc0 kernel/fork.c:2482
kernel_clone+0x226/0x8f0 kernel/fork.c:2780
user_mode_thread+0x132/0x1a0 kernel/fork.c:2858
rest_init+0x23/0x300 init/main.c:712
start_kernel+0x47a/0x500 init/main.c:1103
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
-> #0 (&p->pi_lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3133 [inline]
check_prevs_add kernel/locking/lockdep.c:3252 [inline]
validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5136
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
__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:551 [inline]
try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
rcu_read_unlock_special+0x3db/0x550 kernel/rcu/tree_plugin.h:665
__rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:436
rcu_read_unlock include/linux/rcupdate.h:872 [inline]
get_mem_cgroup_from_mm+0x1b2/0x2a0 mm/memcontrol.c:1271
get_mm_memcg_path+0x1b/0x600 mm/mmap_lock.c:202
__mmap_lock_do_trace_released+0x134/0x620 mm/mmap_lock.c:243
__mmap_lock_trace_released include/linux/mmap_lock.h:42 [inline]
mmap_read_unlock include/linux/mmap_lock.h:170 [inline]
do_user_addr_fault arch/x86/mm/fault.c:1417 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x7a2/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
fault_in_readable+0x165/0x2b0
fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
generic_perform_write+0x220/0x640 mm/filemap.c:4006
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2930
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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
other info that might help us debug this:
Chain exists of:
&p->pi_lock --> &rq->__lock --> lock#10
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(lock#10);
lock(&rq->__lock);
lock(lock#10);
lock(&p->pi_lock);
*** DEADLOCK ***
5 locks held by syz.4.441/7485:
#0: ffff88807a7f00c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
#1: ffff88805f4a2420 (sb_writers#5){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
#1: ffff88805f4a2420 (sb_writers#5){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
#2: ffff88802217e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline]
#2: ffff88802217e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: shmem_file_write_iter+0x83/0x120 mm/shmem.c:2920
#3: ffff88807a0cf398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
#3: ffff88807a0cf398 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5716 [inline]
#3: ffff88807a0cf398 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5776
#4: ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
#4: ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: __mmap_lock_do_trace_released+0x83/0x620 mm/mmap_lock.c:243
stack backtrace:
CPU: 1 PID: 7485 Comm: syz.4.441 Not tainted 6.10.0-syzkaller-04559-g7d30b8aa4fc3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
<TASK>
__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:2186
check_prev_add kernel/locking/lockdep.c:3133 [inline]
check_prevs_add kernel/locking/lockdep.c:3252 [inline]
validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5136
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
__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:551 [inline]
try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
rcu_read_unlock_special+0x3db/0x550 kernel/rcu/tree_plugin.h:665
__rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:436
rcu_read_unlock include/linux/rcupdate.h:872 [inline]
get_mem_cgroup_from_mm+0x1b2/0x2a0 mm/memcontrol.c:1271
get_mm_memcg_path+0x1b/0x600 mm/mmap_lock.c:202
__mmap_lock_do_trace_released+0x134/0x620 mm/mmap_lock.c:243
__mmap_lock_trace_released include/linux/mmap_lock.h:42 [inline]
mmap_read_unlock include/linux/mmap_lock.h:170 [inline]
do_user_addr_fault arch/x86/mm/fault.c:1417 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x7a2/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:fault_in_readable+0x165/0x2b0 mm/gup.c:2355
Code: b4 ff 4c 8d b3 ff 0f 00 00 48 89 d8 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 6b e8 35 d7 b4 ff 4c 39 f3 74 6e 4c 89 64 24 10 <44> 8a 23 43 0f b6 04 2f 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10
RSP: 0018:ffffc90003577a00 EFLAGS: 00050287
RAX: ffffffff81e1868b RBX: 0000000020140000 RCX: 0000000000040000
RDX: ffffc9000b20d000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90003577ab8 R08: ffffffff81e18628 R09: ffffffff84adca99
R10: 0000000000000002 R11: ffff8880298e8000 R12: 0000000000001000
R13: dffffc0000000000 R14: 0000000020141000 R15: 1ffff920006aef48
fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
generic_perform_write+0x220/0x640 mm/filemap.c:4006
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2930
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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: 0033:0x7f7885177299
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7885e95048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7885305f80 RCX: 00007f7885177299
RDX: 00000000002a979d RSI: 0000000020000000 RDI: 0000000000000009
RBP: 00007f78851e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7885305f80 R15: 00007ffeec129288
</TASK>
----------------
Code disassembly (best guess):
0: b4 ff mov $0xff,%ah
2: 4c 8d b3 ff 0f 00 00 lea 0xfff(%rbx),%r14
9: 48 89 d8 mov %rbx,%rax
c: 4d 01 e6 add %r12,%r14
f: 49 81 e6 00 f0 ff ff and $0xfffffffffffff000,%r14
16: 49 39 c6 cmp %rax,%r14
19: 72 6b jb 0x86
1b: e8 35 d7 b4 ff call 0xffb4d755
20: 4c 39 f3 cmp %r14,%rbx
23: 74 6e je 0x93
25: 4c 89 64 24 10 mov %r12,0x10(%rsp)
* 2a: 44 8a 23 mov (%rbx),%r12b <-- trapping instruction
2d: 43 0f b6 04 2f movzbl (%r15,%r13,1),%eax
32: 84 c0 test %al,%al
34: 75 18 jne 0x4e
36: 44 88 64 24 40 mov %r12b,0x40(%rsp)
3b: 48 rex.W
3c: 81 .byte 0x81
3d: c3 ret
3e: 00 10 add %dl,(%rax)