watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:5231] Modules linked in: irq event stamp: 4206317 hardirqs last enabled at (4206316): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4206317): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (4067382): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (4067385): [] __irq_exit_rcu+0x11b/0x180 CPU: 1 PID: 5231 Comm: syz-executor.1 Not tainted 6.1.0-rc6-next-20221122 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:kasan_quarantine_put+0x91/0x1f0 Code: c7 45 00 00 00 00 00 48 03 58 10 48 89 58 10 48 81 fb 00 00 10 00 77 63 41 bc 01 00 00 00 4d 85 ed 74 43 e8 31 02 d3 ff fb 5b <44> 89 e0 5d 41 5c 41 5d 41 5e e9 c4 cc c3 02 e8 db 00 d3 ff 48 c7 RSP: 0018:ffff88806cf09de8 EFLAGS: 00000206 RAX: 0000000000402ee4 RBX: ffff88801dcb37a0 RCX: ffffffff812b6ccf RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffff88801dcb37a0 R08: 0000000000000001 R09: ffffffff8763189f R10: fffffbfff0ec6313 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000200 R14: 0000000000000001 R15: ffff88800844f780 FS: 00007f3d0351e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556812c58 CR3: 0000000016684000 CR4: 0000000000350ee0 Call Trace: kmem_cache_free+0xfb/0x610 rcu_core+0x7cf/0x2070 __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:__rcu_read_lock+0x0/0xf0 Code: e9 4d ff ff ff e8 90 92 49 00 e9 66 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 55 53 65 48 8b 1c 25 00 RSP: 0018:ffff888045e9f218 EFLAGS: 00000246 RAX: 0000000000040000 RBX: ffffffff8564f220 RCX: ffffc900011fc000 RDX: 0000000000040000 RSI: ffffffff81497b07 RDI: ffffffff8564f220 RBP: 00007f3d05fa7c27 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000038001 R12: 00007f3d05fa7c27 R13: 0000000000000000 R14: ffff8880210e5040 R15: 0000000000000000 __is_insn_slot_addr+0x1c/0x250 kernel_text_address+0x48/0xc0 __kernel_text_address+0xd/0x40 unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_kmalloc+0x82/0x90 __kmalloc+0x56/0xc0 ext4_find_extent+0xa41/0xd30 ext4_ext_map_blocks+0x1c7/0x5d40 ext4_map_blocks+0x776/0x19e0 ext4_getblk+0x604/0x7b0 ext4_bread+0x2e/0x1a0 ext4_append+0x21d/0x530 ext4_init_new_dir+0x262/0x4c0 ext4_mkdir+0x3d3/0xb20 vfs_mkdir+0x495/0x740 do_mkdirat+0x16e/0x2d0 __x64_sys_mkdir+0xf6/0x150 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f3d05fa7c27 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:00007f3d0351dfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3d05fa7c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007f3d0351e040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007f3d0351e000 R15: 0000000000000000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ---------------- Code disassembly (best guess): 0: c7 45 00 00 00 00 00 movl $0x0,0x0(%rbp) 7: 48 03 58 10 add 0x10(%rax),%rbx b: 48 89 58 10 mov %rbx,0x10(%rax) f: 48 81 fb 00 00 10 00 cmp $0x100000,%rbx 16: 77 63 ja 0x7b 18: 41 bc 01 00 00 00 mov $0x1,%r12d 1e: 4d 85 ed test %r13,%r13 21: 74 43 je 0x66 23: e8 31 02 d3 ff callq 0xffd30259 28: fb sti 29: 5b pop %rbx * 2a: 44 89 e0 mov %r12d,%eax <-- trapping instruction 2d: 5d pop %rbp 2e: 41 5c pop %r12 30: 41 5d pop %r13 32: 41 5e pop %r14 34: e9 c4 cc c3 02 jmpq 0x2c3ccfd 39: e8 db 00 d3 ff callq 0xffd30119 3e: 48 rex.W 3f: c7 .byte 0xc7