Buffer I/O error on dev loop3, logical block 31, lost async page write syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 31, lost async page write watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.7:9319] Modules linked in: irq event stamp: 5500863 hardirqs last enabled at (5500862): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5500863): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (5392106): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (5392109): [] __irq_exit_rcu+0xcc/0x110 CPU: 0 PID: 9319 Comm: syz-executor.7 Not tainted 6.2.0-next-20230303 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__tasklet_schedule+0x101/0x170 Code: 00 00 e8 a2 ec ff ff 65 66 83 0d 21 96 ea 7e 40 65 8b 05 fa 95 ea 7e a9 00 ff ff 00 74 2f 4d 85 e4 74 06 e8 21 b1 39 00 fb 5b <5d> 41 5c 41 5d e9 99 52 32 03 65 8b 05 ca 91 e9 7e 85 c0 74 be 0f RSP: 0018:ffff88806ce09a98 EFLAGS: 00000202 RAX: 000000000053ef62 RBX: ffff888044ab8d00 RCX: ffffffff812cbd8f RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8118f3df RBP: ffff88806ce285a0 R08: 0000000000000001 R09: ffffffff87782a0f R10: fffffbfff0ef0541 R11: 0000000000000001 R12: 0000000000000200 R13: ffff888016271590 R14: ffff88806ce09c40 R15: ffff888044abb3b8 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005582bff6d098 CR3: 000000000dc2e000 CR4: 0000000000350ef0 Call Trace: ieee80211_rx_irqsafe+0x9d/0xb0 mac80211_hwsim_rx+0x1fd/0x590 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb8f/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:refill_obj_stock+0x299/0x5c0 Code: 02 00 00 48 c7 43 28 00 00 00 00 48 c7 c6 d2 9c 82 81 48 89 df e8 47 c3 aa ff 48 83 3c 24 00 74 06 e8 0b 08 d0 ff fb 4d 85 f6 <74> 08 4c 89 f7 e8 ed 77 ff ff 45 85 ff 0f 85 98 00 00 00 48 83 c4 RSP: 0018:ffff8880099af990 EFLAGS: 00000246 RAX: 000000000018f193 RBX: ffff88806ce36060 RCX: ffffffff812cbd8f RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81829cf5 RBP: ffff88803e991800 R08: 0000000000000001 R09: ffffffff877829ef R10: fffffbfff0ef053d R11: 0000000000000001 R12: ffff88806ce36088 R13: ffffffff87b0e040 R14: 0000000000000000 R15: 0000000000000000 kmem_cache_free+0x482/0x510 remove_vma+0x123/0x170 exit_mmap+0x317/0x960 mmput+0xd5/0x390 do_exit+0x9c6/0x2800 do_group_exit+0xd4/0x2a0 get_signal+0x23c8/0x2450 arch_do_signal_or_restart+0x79/0x590 exit_to_user_mode_prepare+0x122/0x190 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f75662a8b19 Code: Unable to access opcode bytes at 0x7f75662a8aef. RSP: 002b:00007f756381e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000081 RAX: 0000000000000000 RBX: 00007f75663bbf60 RCX: 00007f75662a8b19 RDX: 00000000200001c0 RSI: 0000000000000037 RDI: 000000000000028f RBP: 00007f7566302f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc217b7b7f R14: 00007f756381e300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.2.0-next-20230303 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x128/0xc50 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 d5 09 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 5e 1f 00 00 f3 90 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e4 00 00 RSP: 0018:ffff88806cf09a28 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff844b26ab RDX: fffffbfff0b4aeb1 RSI: 0000000000000004 RDI: ffffffff85a57580 RBP: ffffffff85a57580 R08: 0000000000000000 R09: ffffffff85a57583 R10: fffffbfff0b4aeb0 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0b4aeb0 R14: 0000000000000001 R15: 1ffff1100d9e1346 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005582bff37648 CR3: 000000001452c000 CR4: 0000000000350ee0 Call Trace: do_raw_spin_lock+0x1e0/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6de/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0xf/0x20 Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 83 4f 39 00 fb f4 e9 7f 13 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffff888008e1fe70 EFLAGS: 00000206 RAX: 00000000005988bd RBX: ffff888008da5040 RCX: ffffffff844922de RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81285370 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88806cf34f83 R10: ffffed100d9e69f0 R11: 0000000000000001 R12: ffffed10011b4a08 R13: ffffffff85d28410 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x67/0xa0 do_idle+0x300/0x3d0 cpu_startup_entry+0x18/0x20 start_secondary+0x1ca/0x220 secondary_startup_64_no_verify+0xe0/0xeb perf: interrupt took too long (2518 > 2500), lowering kernel.perf_event_max_sample_rate to 79000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 a2 ec ff ff callq 0xffffeca9 7: 65 66 83 0d 21 96 ea orw $0x40,%gs:0x7eea9621(%rip) # 0x7eea9631 e: 7e 40 10: 65 8b 05 fa 95 ea 7e mov %gs:0x7eea95fa(%rip),%eax # 0x7eea9611 17: a9 00 ff ff 00 test $0xffff00,%eax 1c: 74 2f je 0x4d 1e: 4d 85 e4 test %r12,%r12 21: 74 06 je 0x29 23: e8 21 b1 39 00 callq 0x39b149 28: fb sti 29: 5b pop %rbx * 2a: 5d pop %rbp <-- trapping instruction 2b: 41 5c pop %r12 2d: 41 5d pop %r13 2f: e9 99 52 32 03 jmpq 0x33252cd 34: 65 8b 05 ca 91 e9 7e mov %gs:0x7ee991ca(%rip),%eax # 0x7ee99205 3b: 85 c0 test %eax,%eax 3d: 74 be je 0xfffffffd 3f: 0f .byte 0xf