loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, 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#0 stuck for 21s! [syz-executor.3:6031] Modules linked in: irq event stamp: 7572807 hardirqs last enabled at (7572806): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (7572807): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (7556702): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (7556705): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 6031 Comm: syz-executor.3 Not tainted 6.1.0-next-20221214 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__orc_find+0x6f/0xf0 Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 48 01 RSP: 0018:ffff88806ce09780 EFLAGS: 00000213 RAX: 1ffffffff0c02594 RBX: ffffffff86012ca4 RCX: ffffffff84601449 RDX: 0000000000000000 RSI: ffffffff8646cd1c RDI: ffffffff86012c64 RBP: ffffffff86012c64 R08: ffffffff8646cd1c R09: ffffffff86462e80 R10: ffff88806ce09ff8 R11: 0000000000038001 R12: ffffffff86012ce4 R13: ffffffff86012c64 R14: ffffffff86012c64 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc3f6689e8 CR3: 000000000e4ac000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: unwind_next_frame+0x2b1/0x2130 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0x9f0 __kmem_cache_free+0x95/0x410 skb_release_data+0x6d8/0x810 consume_skb+0xcb/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xc70 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:put_cpu_partial+0x117/0x1c0 Code: 28 75 61 48 c7 43 28 00 00 00 00 48 c7 c6 f0 a0 7c 81 48 89 df e8 09 71 af ff 48 85 ed 74 06 e8 6f 9d d3 ff fb 4d 85 ed 74 21 <5b> 4c 89 ee 5d 4c 89 e7 41 5c 41 5d 41 5e 41 5f e9 54 fa ff ff 44 RSP: 0018:ffff8880473e72a8 EFLAGS: 00000282 RAX: 0000000000707f4d RBX: ffff88806ce3d8a0 RCX: ffffffff812b740f RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000000001 R09: ffffffff8763493f R10: fffffbfff0ec6927 R11: 0000000000000001 R12: ffff88800844f780 R13: ffffea00003c0180 R14: ffffea0000371d00 R15: 0000000000000001 qlist_free_all+0x6d/0x1a0 kasan_quarantine_reduce+0x196/0x230 __kasan_slab_alloc+0x4c/0x70 kmem_cache_alloc+0x1e1/0x410 jbd2_journal_add_journal_head+0x374/0x5d0 jbd2_journal_get_write_access+0x11a/0x1a0 __ext4_journal_get_write_access+0x1be/0x440 ext4_reserve_inode_write+0x18f/0x280 __ext4_mark_inode_dirty+0x15e/0x880 ext4_dirty_inode+0xdd/0x130 __mark_inode_dirty+0x1aa/0xe70 generic_update_time+0x21b/0x2b0 file_modified_flags+0x2d4/0x330 ext4_buffered_write_iter+0xf9/0x460 ext4_file_write_iter+0x3ff/0x1930 __kernel_write_iter+0x264/0x740 __kernel_write+0xcb/0x110 do_acct_process+0xd8a/0x13d0 acct_process+0x3d4/0x500 do_exit+0x17ee/0x2760 do_group_exit+0xd4/0x2a0 get_signal+0x21b7/0x22f0 arch_do_signal_or_restart+0x79/0x5a0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fabd6a80c27 Code: Unable to access opcode bytes at 0x7fabd6a80bfd. RSP: 002b:00007fabd3ff6fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053 RAX: 0000000000000000 RBX: 0000000020000040 RCX: 00007fabd6a80c27 RDX: 0000000000000005 RSI: 00000000000001ff RDI: 00000000200000c0 RBP: 00007fabd3ff7040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007fabd3ff7000 R15: 0000000020000040 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: 72 4d jb 0x4f 2: 4c 89 e0 mov %r12,%rax 5: 48 29 e8 sub %rbp,%rax 8: 48 89 c2 mov %rax,%rdx b: 48 c1 e8 3f shr $0x3f,%rax f: 48 c1 fa 02 sar $0x2,%rdx 13: 48 01 d0 add %rdx,%rax 16: 48 d1 f8 sar %rax 19: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 50 jne 0x8b 3b: 48 63 03 movslq (%rbx),%rax 3e: 48 rex.W 3f: 01 .byte 0x1