================================ WARNING: inconsistent lock state 6.8.0-syzkaller-05271-gf99c5f563c17 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. sshd/5072 [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_trylock include/linux/mmap_lock.h:166 [inline] get_mmap_lock_carefully mm/memory.c:5497 [inline] lock_mm_and_find_vma+0x213/0x2f0 mm/memory.c:5557 do_user_addr_fault arch/x86/mm/fault.c:1385 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x1a9/0x890 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:86 schedule_tail+0x96/0xb0 kernel/sched/core.c:5344 ret_from_fork+0x24/0x80 arch/x86/kernel/process.c:143 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 irq event stamp: 41719 hardirqs last enabled at (41718): [] __do_softirq+0x1d3/0x943 kernel/softirq.c:538 hardirqs last disabled at (41719): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (41719): [] _raw_spin_lock_irq+0xad/0x120 kernel/locking/spinlock.c:170 softirqs last enabled at (41714): [] lock_sock include/net/sock.h:1671 [inline] softirqs last enabled at (41714): [] tcp_sendmsg+0x22/0x50 net/ipv4/tcp.c:1341 softirqs last disabled at (41717): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (41717): [] __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 *** 7 locks held by sshd/5072: #0: ffff88801f4d0e98 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline] #0: ffff88801f4d0e98 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x22/0x50 net/ipv4/tcp.c:1341 #1: ffff88802eebd720 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xaa/0x120 mm/memory.c:6080 #2: ffffc90000a08c00 (&(&ovs_net->masks_rebalance)->timer){..-.}-{0:0}, at: call_timer_fn+0xc0/0x600 kernel/time/timer.c:1789 #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __queue_work+0x198/0xec0 kernel/workqueue.c:2324 #4: ffff8880b953d8d8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x6ec/0xec0 #5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #5: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run3+0x14a/0x460 kernel/trace/bpf_trace.c:2421 #6: ffff88802eebd720 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline] #6: ffff88802eebd720 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x237/0x9d0 kernel/bpf/stackmap.c:141 stack backtrace: CPU: 1 PID: 5072 Comm: sshd Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #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 call_timer_fn+0x17e/0x600 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers kernel/time/timer.c:2408 [inline] __run_timer_base+0x695/0x8e0 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:lock_acquire+0x25b/0x530 kernel/locking/lockdep.c:5758 Code: 2b 00 74 08 4c 89 f7 e8 d3 9a 86 00 f6 44 24 61 02 0f 85 8e 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25 RSP: 0018:ffffc90003f5f4e0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920007ebea8 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8baad3a0 RDI: ffffffff8bfec660 RBP: ffffc90003f5f638 R08: ffffffff92cc7537 R09: 1ffffffff2598ea6 R10: dffffc0000000000 R11: fffffbfff2598ea7 R12: 1ffff920007ebea4 R13: dffffc0000000000 R14: ffffc90003f5f540 R15: 0000000000000246 __might_fault+0xc6/0x120 mm/memory.c:6080 _copy_from_iter+0x108/0x1cf0 lib/iov_iter.c:259 copy_from_iter include/linux/uio.h:204 [inline] copy_from_iter_full include/linux/uio.h:211 [inline] skb_do_copy_data_nocache include/net/sock.h:2231 [inline] skb_copy_to_page_nocache include/net/sock.h:2257 [inline] tcp_sendmsg_locked+0x1857/0x4d00 net/ipv4/tcp.c:1206 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1342 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa84/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f72a9b16bf2 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:00007ffdf1aab748 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007f72a9b16bf2 RDX: 0000000000000064 RSI: 00005618008f9200 RDI: 0000000000000004 RBP: 00005618008f8220 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00005617d7d90aa4 R13: 0000000000000047 R14: 00005617d7d913e8 R15: 00007ffdf1aab7b8 ---------------- Code disassembly (best guess): 0: 2b 00 sub (%rax),%eax 2: 74 08 je 0xc 4: 4c 89 f7 mov %r14,%rdi 7: e8 d3 9a 86 00 call 0x869adf c: f6 44 24 61 02 testb $0x2,0x61(%rsp) 11: 0f 85 8e 01 00 00 jne 0x1a5 17: 41 f7 c7 00 02 00 00 test $0x200,%r15d 1e: 74 01 je 0x21 20: fb sti 21: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp) 28: e0 45 * 2a: 4b c7 44 25 00 00 00 movq $0x0,0x0(%r13,%r12,1) <-- trapping instruction 31: 00 00 33: 43 c7 44 25 09 00 00 movl $0x0,0x9(%r13,%r12,1) 3a: 00 00 3c: 43 rex.XB 3d: c7 .byte 0xc7 3e: 44 rex.R 3f: 25 .byte 0x25