audit: type=1400 audit(1667295917.983:15): avc: denied { create } for pid=4825 comm="syz-executor.1" name="4844" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:kernel_t:s0 tclass=file permissive=1 writeback: attempt to access beyond end of device loop6: rw=1, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 31, lost async page write watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:4830] Modules linked in: irq event stamp: 18060375 hardirqs last enabled at (18060374): [] asm_sysvec_x86_platform_ipi-0xa/0x20 hardirqs last disabled at (18060375): [] sysvec_apic_timer_interrupt+0xb/0xd0 softirqs last enabled at (17997478): [] __irq_exit_rcu+0x11b/0x190 softirqs last disabled at (17997481): [] __irq_exit_rcu+0x11b/0x190 CPU: 1 PID: 4830 Comm: syz-executor.3 Not tainted 6.1.0-rc3-next-20221031 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0xf1/0x2140 Code: ca 17 00 00 4d 8b 66 60 4d 85 e4 74 32 49 8d bc 24 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 64 17 00 00 41 f6 84 24 88 00 00 00 03 0f 85 b7 02 00 00 48 RSP: 0018:ffff88806d109678 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffffffff0eb36e0 RDX: 1ffff11008106eb2 RSI: ffffffff812b96ab RDI: ffff888040837590 RBP: ffff88806d109750 R08: ffffffff86068e50 R09: ffffffff86068e54 R10: ffff88806d109ff8 R11: 0000000000036001 R12: ffff888040837508 R13: ffff88806d109758 R14: ffff88806d1096f8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcb32223260 CR3: 0000000005026000 CR4: 0000000000350ee0 Call Trace: arch_stack_walk+0x83/0x100 stack_trace_save+0x8c/0xd0 kasan_save_stack+0x1e/0x50 kasan_set_track+0x21/0x40 __kasan_slab_alloc+0x58/0x80 kmem_cache_alloc+0x1a9/0x3f0 __create_object+0x3d/0xc10 kmem_cache_alloc_node+0x252/0x410 __alloc_skb+0x216/0x320 __netdev_alloc_skb+0x72/0x3f0 __ieee80211_beacon_get+0x3de/0x1390 ieee80211_beacon_get_tim+0x95/0x4f0 mac80211_hwsim_beacon_tx+0x1ce/0xac0 __iterate_interfaces+0x2d3/0x570 ieee80211_iterate_active_interfaces_atomic+0x70/0x190 mac80211_hwsim_beacon+0x101/0x210 __hrtimer_run_queues+0x541/0xb60 hrtimer_run_softirq+0x172/0x350 __do_softirq+0x1c3/0x8f5 __irq_exit_rcu+0x11b/0x190 irq_exit_rcu+0x5/0x30 sysvec_apic_timer_interrupt+0x8e/0xd0 asm_sysvec_x86_platform_ipi-0xa/0x20 RIP: 0010:lock_acquire+0x1db/0x540 Code: 03 b8 ff ff ff ff 65 0f c1 05 d1 e0 d6 7e 83 f8 01 0f 85 c8 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffff8880408375b0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff11008106eb8 RCX: 0000000049aab866 RDX: 1ffff11002ea9483 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8720e807 R10: fffffbfff0e41d00 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff85207aa0 R15: 0000000000000000 __mod_lruvec_page_state+0x8b/0x340 page_remove_rmap+0x2ce/0x4a0 unmap_page_range+0x1c2d/0x2a50 unmap_single_vma+0x190/0x2b0 unmap_vmas+0x21e/0x380 exit_mmap+0x154/0x690 mmput+0xd1/0x3a0 do_exit+0x993/0x2730 do_group_exit+0xd0/0x2b0 get_signal+0x2195/0x22e0 arch_do_signal_or_restart+0x75/0x5b0 exit_to_user_mode_prepare+0x131/0x1b0 syscall_exit_to_user_mode+0x19/0x50 do_syscall_64+0x48/0xa0 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f0d42740b19 Code: Unable to access opcode bytes at 0x7f0d42740aef. RSP: 002b:00007f0d3fcb6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000006 RBX: 00007f0d42853f60 RCX: 00007f0d42740b19 RDX: 00000000001010c2 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f0d4279af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff148064ef R14: 00007f0d3fcb6300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x20 ---------------- Code disassembly (best guess): 0: ca 17 00 lret $0x17 3: 00 4d 8b add %cl,-0x75(%rbp) 6: 66 60 data16 (bad) 8: 4d 85 e4 test %r12,%r12 b: 74 32 je 0x3f d: 49 8d bc 24 88 00 00 lea 0x88(%r12),%rdi 14: 00 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 fa mov %rdi,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 64 17 00 00 jne 0x1794 <-- trapping instruction 30: 41 f6 84 24 88 00 00 testb $0x3,0x88(%r12) 37: 00 03 39: 0f 85 b7 02 00 00 jne 0x2f6 3f: 48 rex.W