loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): Invalid log block size: 393216 ext4 filesystem being mounted at /syzkaller-testdir642663052/syzkaller.vGqzzK/1166/file0 supports timestamps until 2038-01-19 (0x7fffffff) watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.2:35349] Modules linked in: irq event stamp: 4415575 hardirqs last enabled at (4415574): [] asm_sysvec_irq_work+0x1a/0x20 hardirqs last disabled at (4415575): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (963966): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (963969): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 35349 Comm: syz-executor.2 Not tainted 6.5.0-rc3-next-20230728 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0xc8/0x4f0 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 76 01 00 00 8b 85 f8 03 00 00 85 c0 75 58 <65> 48 8b 1c 25 00 8b 03 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88806ce09d40 EFLAGS: 00000206 RAX: 00000000002fde24 RBX: ffff88806ce3a300 RCX: ffffffff812d50af RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8137cb41 RBP: ffffffff85617680 R08: 0000000000000001 R09: fffffbfff0ee676b R10: ffffffff87733b5f R11: 0000000000000001 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000200 R15: 0000000000000002 FS: 00007f2d4143c700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2d41c3d9c8 CR3: 000000004403a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: get_mem_cgroup_from_objcg+0xa6/0x290 refill_obj_stock+0x34f/0x5c0 kmem_cache_free+0x444/0x4d0 delayed_put_task_struct+0x21a/0x280 rcu_core+0x8c8/0x28b0 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_irq_work+0x6e/0x90 asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x20d/0x830 Code: 89 ff 48 c7 03 00 00 00 00 e8 af a0 38 03 4d 85 e4 75 ba 4c 89 ff e8 72 7b 38 03 e8 4d 9c 30 00 fb 65 48 8b 1c 25 00 8b 03 00 <48> 8d bb 78 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff888042d57a90 EFLAGS: 00000202 RAX: 00000000000005b9 RBX: ffff88801467b680 RCX: 1ffffffff0ba8fc1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81236a63 RBP: ffff888042d57ad0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff85d4a7d7 R11: 0000000000000001 R12: ffff88806ce39558 R13: ffff88803e198000 R14: ffff888008d904a8 R15: ffff88806ce39540 __schedule+0x9b1/0x2b00 __cond_resched+0x46/0x70 __mutex_lock+0xa3/0x1a30 __do_sys_perf_event_open+0x1a19/0x2ae0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f2d43ec6b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2d4143c188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f2d43fd9f60 RCX: 00007f2d43ec6b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00007f2d43f20f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf3bcb62f R14: 00007f2d4143c300 R15: 0000000000022000 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: b8 00 00 00 00 mov $0x0,%eax 5: 00 fc add %bh,%ah 7: ff (bad) 8: df 48 89 fisttps -0x77(%rax) b: fa cli c: 48 c1 ea 03 shr $0x3,%rdx 10: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 14: 84 c0 test %al,%al 16: 74 08 je 0x20 18: 3c 03 cmp $0x3,%al 1a: 0f 8e 76 01 00 00 jle 0x196 20: 8b 85 f8 03 00 00 mov 0x3f8(%rbp),%eax 26: 85 c0 test %eax,%eax 28: 75 58 jne 0x82 * 2a: 65 48 8b 1c 25 00 8b mov %gs:0x38b00,%rbx <-- trapping instruction 31: 03 00 33: 48 8d bb f4 03 00 00 lea 0x3f4(%rbx),%rdi 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax