INFO: task jfsCommit:123 blocked for more than 143 seconds.
Not[ 665.928856][ T38] Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D stack:26936 pid:123 tgid:123 ppid:2 task_flags:0x200040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
io_schedule+0x81/0xe0 kernel/sched/core.c:7789
folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1323
txUnlock+0x240/0xdc0 fs/jfs/jfs_txnmgr.c:930
txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
jfs_lazycommit+0x52e/0xa10 fs/jfs/jfs_txnmgr.c:2734
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
INFO: task syz.9.349:9256 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.349 state:D stack:25120 pid:9256 tgid:9255 ppid:8953 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
io_schedule+0x81/0xe0 kernel/sched/core.c:7789
folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1323
folio_lock include/linux/pagemap.h:1159 [inline]
release_metapage+0x103/0xab0 fs/jfs/jfs_metapage.c:870
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0x9a3/0xde0 fs/jfs/jfs_metapage.c:753
dtSearch+0x591/0x21b0 fs/jfs/jfs_dtree.c:624
jfs_lookup+0x155/0x380 fs/jfs/namei.c:1461
__lookup_slow+0x29d/0x3d0 fs/namei.c:1866
lookup_slow+0x53/0x70 fs/namei.c:1883
walk_component fs/namei.c:2229 [inline]
lookup_last fs/namei.c:2730 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2754
filename_lookup+0x212/0x570 fs/namei.c:2783
user_path_at+0x3a/0x60 fs/namei.c:3576
do_mount fs/namespace.c:4032 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount+0x2d4/0x410 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c6a93f749
RSP: 002b:00007f2c68b9e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2c6ab95fa0 RCX: 00007f2c6a93f749
RDX: 0000200000002100 RSI: 00002000000020c0 RDI: 0000000000000000
RBP: 00007f2c6a9c3f91 R08: 00002000000003c0 R09: 0000000000000000
R10: 0000000000000410 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c6ab96038 R14: 00007f2c6ab95fa0 R15: 00007ffddd03c7d8
INFO: task syz.9.349:9259 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.349 state:D stack:25272 pid:9259 tgid:9255 ppid:8953 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
io_schedule+0x81/0xe0 kernel/sched/core.c:7789
lmGroupCommit+0x6f7/0xb30 fs/jfs/jfs_logmgr.c:713
txCommit+0x4940/0x5430 fs/jfs/jfs_txnmgr.c:1305
jfs_truncate_nolock+0x22f/0x340 fs/jfs/inode.c:407
jfs_truncate fs/jfs/inode.c:420 [inline]
jfs_write_failed+0x119/0x190 fs/jfs/inode.c:295
jfs_write_end+0x68/0x90 fs/jfs/inode.c:322
generic_perform_write+0x611/0x8c0 mm/filemap.c:4335
generic_file_write_iter+0x118/0x550 mm/filemap.c:4457
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5d5/0xb40 fs/read_write.c:686
ksys_write+0x14b/0x260 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c6a93f749
RSP: 002b:00007f2c68b7d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2c6ab96090 RCX: 00007f2c6a93f749
RDX: 000000000000ffc9 RSI: 0000200000000140 RDI: 0000000000000005
RBP: 00007f2c6a9c3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c6ab96128 R14: 00007f2c6ab96090 R15: 00007ffddd03c7d8
INFO: task syz.9.349:9279 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.349 state:D stack:24856 pid:9279 tgid:9255 ppid:8953 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
d_wait_lookup fs/dcache.c:2581 [inline]
d_alloc_parallel+0xc3a/0x1610 fs/dcache.c:2671
__lookup_slow+0x11c/0x3d0 fs/namei.c:1851
lookup_slow+0x53/0x70 fs/namei.c:1883
walk_component fs/namei.c:2229 [inline]
lookup_last fs/namei.c:2730 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2754
filename_lookup+0x212/0x570 fs/namei.c:2783
user_path_at+0x3a/0x60 fs/namei.c:3576
__do_sys_name_to_handle_at fs/fhandle.c:162 [inline]
__se_sys_name_to_handle_at+0x181/0x930 fs/fhandle.c:130
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c6a93f749
RSP: 002b:00007f2c68b5c038 EFLAGS: 00000246 ORIG_RAX: 000000000000012f
RAX: ffffffffffffffda RBX: 00007f2c6ab96180 RCX: 00007f2c6a93f749
RDX: 0000200000000180 RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007f2c6a9c3f91 R08: 0000000000001400 R09: 0000000000000000
R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c6ab96218 R14: 00007f2c6ab96180 R15: 00007ffddd03c7d8
Showing all locks held in the system:
3 locks held by kworker/u8:1/13:
#0: ffff8880307df138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff8880307df138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770 kernel/workqueue.c:3340
#1: ffffc90000127bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90000127bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770 kernel/workqueue.c:3340
#2: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x119/0x15a0 net/ipv6/addrconf.c:4194
1 lock held by khungtaskd/38:
#0: ffffffff8d5ae940 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8d5ae940 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8d5ae940 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
5 locks held by kworker/u8:6/980:
#0: ffff888019ad4938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff888019ad4938 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770 kernel/workqueue.c:3340
#1: ffffc90004a3fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90004a3fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770 kernel/workqueue.c:3340
#2: ffffffff8e898800 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x7b0 net/core/net_namespace.c:670
#3: ffff888062a557b8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x116/0x310 drivers/net/wireguard/device.c:249
#4: ffffffff8d5b43b0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3816
2 locks held by getty/5560:
#0: ffff8880355630a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e7e2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x44f/0x1460 drivers/tty/n_tty.c:2211
1 lock held by syz.9.349/9256:
#0: ffff8880616b85b8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
#0: ffff8880616b85b8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1882
5 locks held by syz.9.349/9259:
#0: ffff88802c882b28 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x253/0x320 fs/file.c:1255
#1: ffff88803922e480 (sb_writers#22){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2681 [inline]
#1: ffff88803922e480 (sb_writers#22){.+.+}-{0:0}, at: vfs_write+0x217/0xb40 fs/read_write.c:682
#2: ffff88805f92dd78 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#2: ffff88805f92dd78 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: generic_file_write_iter+0xec/0x550 mm/filemap.c:4454
#3: ffff88805f92d928 (&jfs_ip->rdwrlock#2){++++}-{4:4}, at: jfs_truncate fs/jfs/inode.c:419 [inline]
#3: ffff88805f92d928 (&jfs_ip->rdwrlock#2){++++}-{4:4}, at: jfs_write_failed+0xfe/0x190 fs/jfs/inode.c:295
#4: ffff88805f92d9a8 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_truncate_nolock+0x181/0x340 fs/jfs/inode.c:394
1 lock held by syz.9.349/9279:
#0: ffff8880616b85b8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
#0: ffff8880616b85b8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1882
1 lock held by syz-executor/9997:
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8ec/0x1c90 net/core/rtnetlink.c:4071
1 lock held by syz-executor/10022:
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: inet6_rtm_newaddr+0x5b7/0xd20 net/ipv6/addrconf.c:5027
8 locks held by syz-executor/10148:
#0: ffff888035a32480 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2681 [inline]
#0: ffff888035a32480 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x217/0xb40 fs/read_write.c:682
#1: ffff8880217ed878 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1df/0x540 fs/kernfs/file.c:343
#2: ffff888027913c38 (kn->active#52){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff888027913c38 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x232/0x540 fs/kernfs/file.c:344
#3: ffffffff8e12c638 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd1/0x360 drivers/net/netdevsim/bus.c:234
#4: ffff888058e6a0d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#4: ffff888058e6a0d8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1104 [inline]
#4: ffff888058e6a0d8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x800 drivers/base/dd.c:1302
#5: ffff88802e70e300 (&devlink->lock_key#40){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1777
#6: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0xed/0x680 drivers/net/netdevsim/netdev.c:1175
#7: ffff88805886ce98 (&dev_instance_lock_key#20){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2781 [inline]
#7: ffff88805886ce98 (&dev_instance_lock_key#20){+.+.}-{4:4}, at: unregister_netdevice_many_notify+0x58b/0x2330 net/core/dev.c:12343
2 locks held by syz-executor/10241:
#0: ffffffff8e021cc8 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e021cc8 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8e021cc8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8ec/0x1c90 net/core/rtnetlink.c:4071
1 lock held by syz-executor/10275:
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff8e8a5938 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x71c/0xb70 net/core/rtnetlink.c:6964
1 lock held by rm/10329:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xf95/0xfe0 kernel/hung_task.c:515
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10329 Comm: rm Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:memset_orig+0x36/0xb0 arch/x86/lib/memset_64.S:70
Code: 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 74 48 89 d1 48 c1 e9 06 74 39 66 0f 1f 84 00 00 00 00 00 48 ff c9 48 89 07 <48> 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89
RSP: 0018:ffffc90005dfef48 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000cc0 RCX: 0000000000000001
RDX: 0000000000000200 RSI: 0000000000000000 RDI: ffffc90005dff0d0
RBP: ffffc90005dff178 R08: ffffffff8edb3677 R09: 0000000000000000
R10: ffffc90005dfef50 R11: fffffbfff1db66cf R12: 0000000000000100
R13: 0000000000000001 R14: ffff888084bad100 R15: ffffc90005dfef50
FS: 0000000000000000(0000) GS:ffff888126dee000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007face864eeb8 CR3: 0000000032270000 CR4: 00000000003526f0
Call Trace:
kasan_save_stack mm/kasan/common.c:54 [inline]
kasan_save_track+0x2f/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x18d/0x6c0 mm/slub.c:5270
mt_alloc_one lib/maple_tree.c:174 [inline]
mas_alloc_nodes+0x291/0x350 lib/maple_tree.c:1110
mas_preallocate+0x2e0/0x670 lib/maple_tree.c:5194
vma_iter_prealloc mm/vma.h:502 [inline]
__split_vma+0x2fd/0x9e0 mm/vma.c:521
vms_gather_munmap_vmas+0x2e2/0x12f0 mm/vma.c:1362
__mmap_setup mm/vma.c:2366 [inline]
__mmap_region mm/vma.c:2690 [inline]
mmap_region+0x742/0x1d00 mm/vma.c:2786
do_mmap+0xc23/0x10c0 mm/mmap.c:558
vm_mmap_pgoff+0x2a9/0x4d0 mm/util.c:581
ksys_mmap_pgoff+0x4e9/0x720 mm/mmap.c:604
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7face8939242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffca4ffdf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007face861a000 RCX: 00007face8939242
RDX: 0000000000000005 RSI: 000000000001c000 RDI: 00007face861a000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000008000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffca4ffdf58
R13: 00007face890eab0 R14: 00007ffca4ffe380 R15: 00000fff949ffbe4