================================ WARNING: inconsistent lock state 6.8.0-syzkaller-05236-g443574b03387 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. sshd/5061 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff8880b9538528 (lock#9){+.?.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9538528 (lock#9){+.?.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x8f/0x600 mm/mmap_lock.c:237 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0xa8/0x600 mm/mmap_lock.c:237 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_lock include/linux/mmap_lock.h:147 [inline] process_vm_rw_single_vec mm/process_vm_access.c:105 [inline] process_vm_rw_core mm/process_vm_access.c:216 [inline] process_vm_rw+0xa46/0xcf0 mm/process_vm_access.c:284 __do_sys_process_vm_readv mm/process_vm_access.c:296 [inline] __se_sys_process_vm_readv mm/process_vm_access.c:292 [inline] __x64_sys_process_vm_readv+0xe0/0x100 mm/process_vm_access.c:292 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 irq event stamp: 58099 hardirqs last enabled at (58098): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (58098): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (58099): [] queue_work_on+0xfa/0x250 kernel/workqueue.c:2432 softirqs last enabled at (58036): [] tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1343 softirqs last disabled at (58095): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (58095): [] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#9); lock(lock#9); *** DEADLOCK *** 5 locks held by sshd/5061: #0: ffffc90000a08c00 ((&sdp->delay_work)){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x600 kernel/time/timer.c:1789 #1: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #1: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #1: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __queue_work+0x198/0xec0 kernel/workqueue.c:2324 #2: ffff8880b943d8d8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x6ec/0xec0 #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run3+0x14a/0x460 kernel/trace/bpf_trace.c:2421 #4: ffff88807ce2b120 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline] #4: ffff88807ce2b120 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x237/0x9d0 kernel/bpf/stackmap.c:141 stack backtrace: CPU: 1 PID: 5061 Comm: sshd Not tainted 6.8.0-syzkaller-05236-g443574b03387 #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+0x1e7/0x2e0 lib/dump_stack.c:106 valid_state+0x13a/0x1c0 kernel/locking/lockdep.c:4013 mark_lock_irq+0xbb/0xc20 kernel/locking/lockdep.c:4216 mark_lock+0x223/0x350 kernel/locking/lockdep.c:4678 __lock_acquire+0xbcd/0x1fd0 kernel/locking/lockdep.c:5091 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0xa8/0x600 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:166 [inline] stack_map_get_build_id_offset+0x9b2/0x9d0 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:1985 [inline] bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1975 bpf_prog_e6cf5f9c69743609+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run3+0x238/0x460 kernel/trace/bpf_trace.c:2421 __traceiter_workqueue_queue_work+0x80/0xd0 include/trace/events/workqueue.h:23 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline] __queue_work+0xe5b/0xec0 kernel/workqueue.c:2382 queue_work_on+0x14f/0x250 kernel/workqueue.c:2435 call_timer_fn+0x17e/0x600 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2408 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2419 run_timer_base kernel/time/timer.c:2428 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2438 __do_softirq+0x2bc/0x943 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:167 [inline] RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline] RIP: 0010:do_syscall_64+0xbc/0x240 arch/x86/entry/common.c:79 Code: f7 00 00 00 48 8b 7d 08 e8 a1 64 00 00 0f 1f 44 00 00 0f 1f 44 00 00 90 e8 e1 8f 2c f6 90 90 e8 8a 8f 2c f6 fb 49 8b 54 24 08 c2 3f 74 0e 4c 89 f7 4c 89 fe e8 f4 f2 0e f6 49 89 c7 90 90 41 RSP: 0018:ffffc90004047f10 EFLAGS: 00000282 RAX: f1809b0a4817ad00 RBX: ffffc90004047f10 RCX: ffffffff944bf403 RDX: 0000000000000000 RSI: ffffffff8baac220 RDI: ffffffff8bfec6e0 RBP: ffffc90004047f48 R08: ffffffff8f86ae6f R09: 1ffffffff1f0d5cd R10: dffffc0000000000 R11: fffffbfff1f0d5ce R12: ffff88801f750000 R13: 0000000000000000 R14: ffffc90004047f58 R15: 0000000000000001 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7ff7c0316bf2 Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fff8603c558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000000000a4 RCX: 00007ff7c0316bf2 RDX: 00000000000000a4 RSI: 00005652c255e7f0 RDI: 0000000000000004 RBP: 00005652c254f3f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00005652938ffaa4 R13: 000000000000003a R14: 00005652939003e8 R15: 00007fff8603c5c8 ---------------- Code disassembly (best guess): 0: f7 00 00 00 48 8b testl $0x8b480000,(%rax) 6: 7d 08 jge 0x10 8: e8 a1 64 00 00 call 0x64ae d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 12: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 17: 90 nop 18: e8 e1 8f 2c f6 call 0xf62c8ffe 1d: 90 nop 1e: 90 nop 1f: e8 8a 8f 2c f6 call 0xf62c8fae 24: fb sti 25: 49 8b 54 24 08 mov 0x8(%r12),%rdx * 2a: f6 c2 3f test $0x3f,%dl <-- trapping instruction 2d: 74 0e je 0x3d 2f: 4c 89 f7 mov %r14,%rdi 32: 4c 89 fe mov %r15,%rsi 35: e8 f4 f2 0e f6 call 0xf60ef32e 3a: 49 89 c7 mov %rax,%r15 3d: 90 nop 3e: 90 nop 3f: 41 rex.B