syzbot

INFO: task syz-executor.1:19549 blocked for more than 143 seconds.
      Not tainted 6.5.0-syzkaller-11938-g65d6e954e378 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:24352 pid:19549 ppid:19534  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 grab_super_dead+0x22b/0x3f0 fs/super.c:582
 sget_fc+0x1fa/0x750 fs/super.c:834
 sget_dev fs/super.c:1416 [inline]
 get_tree_bdev+0x21e/0x5b0 fs/super.c:1555
 vfs_get_tree+0x8c/0x280 fs/super.c:1750
 do_new_mount+0x28f/0xae0 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f419e27e1ea
RSP: 002b:00007f419efbdee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f419efbdf80 RCX: 00007f419e27e1ea
RDX: 0000000020000180 RSI: 0000000020000040 RDI: 00007f419efbdf40
RBP: 0000000020000180 R08: 00007f419efbdf80 R09: 000000000100c018
R10: 000000000100c018 R11: 0000000000000202 R12: 0000000020000040
R13: 00007f419efbdf40 R14: 000000000001f414 R15: 0000000020021700
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.5.0-syzkaller-11938-g65d6e954e378 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xdf5/0xe40 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 778 Comm: kworker/0:2 Not tainted 6.5.0-syzkaller-11938-g65d6e954e378 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:220 [inline]
RIP: 0010:unwind_next_frame+0x2ae/0x29e0 arch/x86/kernel/unwind_orc.c:494
Code: 38 6a b4 8f 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 83 20 00 00 44 8b 23 41 ff c4 4b 8d 04 7f 48 8d 8c 00 70 47 12 8f <48> c7 c0 38 6a b4 8f 48 89 4c 24 18 48 39 c1 0f 83 b2 1d 00 00 4b
RSP: 0018:ffffc90003e1f648 EFLAGS: 00000206
RAX: 0000000000031f74 RBX: ffffffff8fb5dc80 RCX: ffffffff8f188658
RDX: ffff88801c4d5940 RSI: 0000000000005c91 RDI: 00000000000a0000
RBP: 0000000000005c91 R08: ffffffff813d83d9 R09: ffffc90003e1f810
R10: 0000000000000003 R11: ffff88801c4d5940 R12: 0000000000010a7d
R13: 00000000000a0001 R14: dffffc0000000000 R15: 0000000000010a7c
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5380d7086 CR3: 000000002de66000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_stack_walk+0x146/0x1a0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook mm/slub.c:1826 [inline]
 slab_free mm/slub.c:3809 [inline]
 kmem_cache_free+0x292/0x500 mm/slub.c:3831
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
 nsim_dev_trap_report_work+0x761/0xa90 drivers/net/netdevsim/dev.c:850
 process_one_work+0x781/0x1130 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0xabf/0x1060 kernel/workqueue.c:2784
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>