INFO: task syz.0.1106:11550 blocked for more than 144 seconds.
Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1106 state:D stack:25328 pid:11550 tgid:11546 ppid:10171 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
bdev_open+0xf0/0xc50 block/bdev.c:903
bdev_file_open_by_dev+0x1b0/0x220 block/bdev.c:1017
setup_bdev_super+0x5d/0x5d0 fs/super.c:1554
get_tree_bdev_flags+0x3da/0x5c0 fs/super.c:1634
gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1330
vfs_get_tree+0x92/0x2b0 fs/super.c:1814
do_new_mount+0x2be/0xb40 fs/namespace.c:3560
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9dc198cde9
RSP: 002b:00007f9dc2802038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9dc1ba6080 RCX: 00007f9dc198cde9
RDX: 00004000000001c0 RSI: 0000400000000040 RDI: 0000400000000100
RBP: 00007f9dc1a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9dc1ba6080 R15: 00007ffc0f402718
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by getty/5591:
#0: ffff8880358d20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
1 lock held by udevd/9778:
#0: ffff888144b684c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:903
2 locks held by syz.0.1106/11550:
#0: ffff88805456c0e0 (&type->s_umount_key#120/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffff888144b684c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:903
7 locks held by syz-executor/12880:
#0: ffff888035304420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline]
#0: ffff888035304420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 fs/read_write.c:675
#1: ffff88807bf79488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
#2: ffff888143fe91e8 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f77b448 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff88802418d0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#4: ffff88802418d0e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88802418d0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff88807a2ea250 (&devlink->lock_key#27){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
#6: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:302 [inline]
#6: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x820 kernel/rcu/tree_exp.h:996
4 locks held by dhcpcd-run-hook/13164:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13171 Comm: dhcpcd-run-hook Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline]
RIP: 0010:lock_acquire+0x180/0x550 kernel/locking/lockdep.c:5847
Code: 8d bc 24 80 00 00 00 4c 89 fb 48 c1 eb 03 42 80 3c 2b 00 74 08 4c 89 ff e8 7d 4d 8c 00 48 c7 84 24 80 00 00 00 00 00 00 00 9c <8f> 84 24 80 00 00 00 42 80 3c 2b 00 74 08 4c 89 ff e8 6a 4c 8c 00
RSP: 0018:ffffc9000bdc6e98 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff920017b8de4 RCX: ffffffff819cadd4
RDX: 0000000000000000 RSI: ffffffff8c80ed60 RDI: ffffffff8c80ed20
RBP: ffffc9000bdc6ff0 R08: ffffffff903ce777 R09: 1ffffffff2079cee
R10: dffffc0000000000 R11: fffffbfff2079cef R12: 1ffff920017b8ddc
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000bdc6f20
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa60d6855e8 CR3: 000000004f1d2000 CR4: 0000000000350ef0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
is_bpf_text_address+0x46/0x2a0 kernel/bpf/core.c:772
kernel_text_address+0xa7/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kmem_cache_free+0x195/0x410 mm/slub.c:4711
anon_vma_chain_free mm/rmap.c:147 [inline]
unlink_anon_vmas+0x5a0/0x5f0 mm/rmap.c:447
free_pgtables+0x567/0x840 mm/memory.c:408
exit_mmap+0x522/0xd40 mm/mmap.c:1295
__mmput+0x115/0x420 kernel/fork.c:1356
exec_mmap+0x7a5/0x890 fs/exec.c:1011
begin_new_exec+0x1281/0x2100 fs/exec.c:1267
load_elf_binary+0x973/0x2820 fs/binfmt_elf.c:1002
search_binary_handler fs/exec.c:1775 [inline]
exec_binprm fs/exec.c:1807 [inline]
bprm_execve+0x97b/0x1430 fs/exec.c:1859
do_execveat_common+0x57f/0x710 fs/exec.c:1966
do_execve fs/exec.c:2040 [inline]
__do_sys_execve fs/exec.c:2116 [inline]
__se_sys_execve fs/exec.c:2111 [inline]
__x64_sys_execve+0x92/0xb0 fs/exec.c:2111
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa60d5d2ef7
Code: Unable to access opcode bytes at 0x7fa60d5d2ecd.
RSP: 002b:00007ffcac630538 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055f93b12d048 RCX: 00007fa60d5d2ef7
RDX: 000055f93b12d068 RSI: 000055f93b12d048 RDI: 000055f93b12d118
RBP: 000055f93b12d118 R08: 000055f93b12d11d R09: 00007ffcac635dce
R10: 0000000000000008 R11: 0000000000000246 R12: 000055f93b12d068
R13: 00007fa60d780904 R14: 000055f93b12d068 R15: 0000000000000000