watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.4:7655] Modules linked in: irq event stamp: 4946697 hardirqs last enabled at (4946696): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4946697): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (4921972): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (4921975): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 7655 Comm: syz-executor.4 Not tainted 6.5.0-rc2-next-20230718 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:kasan_quarantine_put+0x83/0x1d0 Code: 00 00 00 00 48 03 50 10 48 89 50 10 48 89 d3 48 81 fa 00 00 10 00 77 59 41 bd 01 00 00 00 4d 85 e4 74 39 e8 af 15 d2 ff fb 5b <44> 89 e8 5d 41 5c 41 5d 41 5e e9 be 5e d4 02 e8 a9 16 d2 ff 48 c7 RSP: 0018:ffff88806ce09e08 EFLAGS: 00000202 RAX: 00000000004b7aea RBX: ffff88800d95ce40 RCX: ffffffff812d377f RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8181c131 RBP: ffff88800844f780 R08: 0000000000000001 R09: fffffbfff0efab6c R10: ffffffff877d5b67 R11: 0000000000000001 R12: 0000000000000200 R13: 0000000000000001 R14: ffffffff8137dbc8 R15: ffff88800d95cec0 FS: 00007efe562ec700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efe562ebfe8 CR3: 00000000459de000 CR4: 0000000000350ef0 Call Trace: kmem_cache_free+0x10d/0x4d0 rcu_core+0x8c8/0x28b0 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__schedule+0xd3/0x2b00 Code: 89 f8 48 c1 e8 03 80 3c 10 00 0f 85 4d 22 00 00 4e 03 24 ed 00 29 2e 85 49 8d 84 24 e0 09 00 00 48 89 c2 48 89 85 e8 fe ff ff <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 0a 22 RSP: 0018:ffff8880456c78f8 EFLAGS: 00000282 RAX: ffff88806ce39f20 RBX: 0000000000039540 RCX: 0000000000000001 RDX: ffff88806ce39f20 RSI: ffffffff8560c360 RDI: ffffffff852e2900 RBP: ffff8880456c7a28 R08: 0000000000000000 R09: ffff888044fa2528 R10: ffffffff85d44797 R11: 0000000000000001 R12: ffff88806ce39540 R13: 0000000000000000 R14: 0000000000000c40 R15: 0000000000000c40 __cond_resched+0x46/0x70 kmem_cache_alloc_lru+0x3e7/0x680 ext4_alloc_inode+0x28/0x640 alloc_inode+0x63/0x240 new_inode+0x25/0x1f0 __ext4_new_inode+0x323/0x53d0 ext4_mkdir+0x33e/0xb20 vfs_mkdir+0x24b/0x470 do_mkdirat+0x163/0x2d0 __x64_sys_mkdir+0xf6/0x150 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7efe58d75c27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 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:00007efe562ebfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efe58d75c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000700 RBP: 00007efe562ec040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000200006c0 R13: 0000000020000700 R14: 00007efe562ec000 R15: 0000000020000240 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: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 48 03 50 10 add 0x10(%rax),%rdx 8: 48 89 50 10 mov %rdx,0x10(%rax) c: 48 89 d3 mov %rdx,%rbx f: 48 81 fa 00 00 10 00 cmp $0x100000,%rdx 16: 77 59 ja 0x71 18: 41 bd 01 00 00 00 mov $0x1,%r13d 1e: 4d 85 e4 test %r12,%r12 21: 74 39 je 0x5c 23: e8 af 15 d2 ff callq 0xffd215d7 28: fb sti 29: 5b pop %rbx * 2a: 44 89 e8 mov %r13d,%eax <-- trapping instruction 2d: 5d pop %rbp 2e: 41 5c pop %r12 30: 41 5d pop %r13 32: 41 5e pop %r14 34: e9 be 5e d4 02 jmpq 0x2d45ef7 39: e8 a9 16 d2 ff callq 0xffd216e7 3e: 48 rex.W 3f: c7 .byte 0xc7