INFO: task syz-executor:4266 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22640 pid:4266 ppid:4265 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5257 [inline]
__schedule+0x1089/0x4140 kernel/sched/core.c:6584
schedule+0xb9/0x180 kernel/sched/core.c:6660
io_schedule+0x7c/0xd0 kernel/sched/core.c:8848
bit_wait_io+0xf/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9b/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x138/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x605/0xf20 fs/jbd2/transaction.c:1115
jbd2_journal_get_write_access+0x108/0x140 fs/jbd2/transaction.c:1250
__ext4_journal_get_write_access+0x24b/0x6e0 fs/ext4/ext4_jbd2.c:235
ext4_reserve_inode_write+0x201/0x290 fs/ext4/inode.c:5978
__ext4_mark_inode_dirty+0x161/0x7b0 fs/ext4/inode.c:6162
ext4_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6199
__mark_inode_dirty+0x2e7/0xe80 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:1944 [inline]
inode_update_time fs/inode.c:1957 [inline]
__file_update_time+0x21d/0x240 fs/inode.c:2145
file_update_time+0x2f3/0x370 fs/inode.c:2176
ext4_page_mkwrite+0x1a9/0x10d0 fs/ext4/inode.c:6317
do_page_mkwrite+0x16b/0x5c0 mm/memory.c:3009
do_shared_fault mm/memory.c:4694 [inline]
do_fault mm/memory.c:4762 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x199c/0x3d40 mm/memory.c:5292
do_user_addr_fault+0x5a9/0xbb0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1429 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7ff335271d23
RSP: 002b:00007ffe146c0030 EFLAGS: 00010202
RAX: 00007ff32c7e826c RBX: 00007ffe146c0160 RCX: 0000000000000000
RDX: 00007ff32c7e8268 RSI: 0000000000000008 RDI: 00007ffe146c0160
RBP: 00000000000003e6 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffe146c0140 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000017d94 R14: fffffffffffe826c R15: 0000000000000000
INFO: task syz.3.53:4525 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.53 state:D stack:26256 pid:4525 ppid:4283 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5257 [inline]
__schedule+0x1089/0x4140 kernel/sched/core.c:6584
schedule+0xb9/0x180 kernel/sched/core.c:6660
io_schedule+0x7c/0xd0 kernel/sched/core.c:8848
bit_wait_io+0xf/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9b/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x138/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x605/0xf20 fs/jbd2/transaction.c:1115
jbd2_journal_get_write_access+0x108/0x140 fs/jbd2/transaction.c:1250
__ext4_journal_get_write_access+0x24b/0x6e0 fs/ext4/ext4_jbd2.c:235
ext4_reserve_inode_write+0x201/0x290 fs/ext4/inode.c:5978
__ext4_mark_inode_dirty+0x161/0x7b0 fs/ext4/inode.c:6162
ext4_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6199
__mark_inode_dirty+0x2e7/0xe80 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:1944 [inline]
inode_update_time fs/inode.c:1957 [inline]
__file_update_time+0x21d/0x240 fs/inode.c:2145
file_update_time+0x2f3/0x370 fs/inode.c:2176
ext4_page_mkwrite+0x1a9/0x10d0 fs/ext4/inode.c:6317
do_page_mkwrite+0x16b/0x5c0 mm/memory.c:3009
do_shared_fault mm/memory.c:4694 [inline]
do_fault mm/memory.c:4762 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x199c/0x3d40 mm/memory.c:5292
do_user_addr_fault+0x5a9/0xbb0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1429 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f470b474371
RSP: 002b:00007ffe10ac6f40 EFLAGS: 00010202
RAX: 0000001b3061f000 RBX: ffffffff83c42fb4 RCX: 0000001b3061eff8
RDX: 0000001b3002421c RSI: 0000000000000008 RDI: 00007f470c355720
RBP: 00000000000001a1 R08: 00007f470b810000 R09: 00007f470b812000
R10: 0000000083c42fb8 R11: 0000000000000003 R12: 00007f470b826038
R13: 0000000000004124 R14: ffffffff83c42d30 R15: 00007f470c355720
INFO: task syz.2.55:4532 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.55 state:D stack:25488 pid:4532 ppid:4279 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5257 [inline]
__schedule+0x1089/0x4140 kernel/sched/core.c:6584
schedule+0xb9/0x180 kernel/sched/core.c:6660
io_schedule+0x7c/0xd0 kernel/sched/core.c:8848
bit_wait_io+0xf/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9b/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x138/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x605/0xf20 fs/jbd2/transaction.c:1115
jbd2_journal_get_write_access+0x108/0x140 fs/jbd2/transaction.c:1250
__ext4_journal_get_write_access+0x24b/0x6e0 fs/ext4/ext4_jbd2.c:235
ext4_reserve_inode_write+0x201/0x290 fs/ext4/inode.c:5978
__ext4_mark_inode_dirty+0x161/0x7b0 fs/ext4/inode.c:6162
ext4_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6199
__mark_inode_dirty+0x2e7/0xe80 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:1944 [inline]
inode_update_time fs/inode.c:1957 [inline]
__file_update_time+0x21d/0x240 fs/inode.c:2145
file_update_time+0x2f3/0x370 fs/inode.c:2176
ext4_page_mkwrite+0x1a9/0x10d0 fs/ext4/inode.c:6317
do_page_mkwrite+0x16b/0x5c0 mm/memory.c:3009
do_shared_fault mm/memory.c:4694 [inline]
do_fault mm/memory.c:4762 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x199c/0x3d40 mm/memory.c:5292
do_user_addr_fault+0x5a9/0xbb0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1429 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fe669674ad2
RSP: 002b:00007ffc76089470 EFLAGS: 00010202
RAX: 0000000000001008 RBX: 00007fe66a555720 RCX: 0000000000000000
RDX: 0000001b30523000 RSI: 0000000000000008 RDI: 00007fe66a555720
RBP: 000000000000019c R08: 00007fe669a10000 R09: 00007fe669a26038
R10: 0000000000000003 R11: ffffffff812fffff R12: ffffffff840e0be8
R13: 00007fe669a26038 R14: 000000000000005a R15: fffffffffffff000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8db2e3f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xce0 kernel/rcu/tasks.h:543
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8db2ec30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xce0 kernel/rcu/tasks.h:543
1 lock held by khungtaskd/28:
#0: ffffffff8db2daa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8db2daa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8db2daa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6669
7 locks held by kworker/u4:4/77:
#0: ffff888141eb3938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#1: ffffc900015d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#2: ffff88807e6620e0 (&type->s_umount_key#31){++++}-{3:3}, at: trylock_super+0x1c/0xf0 fs/super.c:415
#3: ffff88807e664c18 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1785 [inline]
#3: ffff88807e664c18 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x246/0x2fe0 fs/ext4/inode.c:2719
#4: ffff88807e666990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x2014/0x2240 fs/jbd2/transaction.c:463
#5: ffff888075781698 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x914/0x1a90 fs/ext4/inode.c:674
#6: ffffe8ffffd33c68 (&lg->lg_mutex){+.+.}-{3:3}, at: ext4_mb_group_or_file fs/ext4/mballoc.c:5321 [inline]
#6: ffffe8ffffd33c68 (&lg->lg_mutex){+.+.}-{3:3}, at: ext4_mb_initialize_context+0x7f0/0xb80 fs/ext4/mballoc.c:5364
2 locks held by getty/4035:
#0: ffff888032306098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x430/0x1400 drivers/tty/n_tty.c:2198
3 locks held by syz-executor/4266:
#0: ffff88807f4053d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807f4053d8 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline]
#0: ffff88807f4053d8 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2f0 mm/memory.c:5382
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1897 [inline]
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:2001 [inline]
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x192/0x10d0 fs/ext4/inode.c:6316
#2: ffff88807e666990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x2014/0x2240 fs/jbd2/transaction.c:463
3 locks held by syz.3.53/4525:
#0: ffff888078de1058 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff888078de1058 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline]
#0: ffff888078de1058 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2f0 mm/memory.c:5382
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1897 [inline]
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:2001 [inline]
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x192/0x10d0 fs/ext4/inode.c:6316
#2: ffff88807e666990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x2014/0x2240 fs/jbd2/transaction.c:463
3 locks held by syz.2.55/4532:
#0: ffff888078de2e58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff888078de2e58 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline]
#0: ffff888078de2e58 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2f0 mm/memory.c:5382
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1897 [inline]
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:2001 [inline]
#1: ffff88807e662558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x192/0x10d0 fs/ext4/inode.c:6316
#2: ffff88807e666990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x2014/0x2240 fs/jbd2/transaction.c:463
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf0e/0xf50 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:-1 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline]
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:357 [inline]
RIP: 0010:unwind_next_frame+0x731/0x1fd0 arch/x86/kernel/unwind_orc.c:539
Code: 89 54 24 18 4c 89 74 24 50 4c 89 7c 24 08 4c 89 64 24 20 48 8d 7b 08 49 89 ff 49 c1 ef 03 41 80 3c 2f 00 74 05 e8 9f ba 9a 00 <4c> 89 6c 24 38 48 8b 53 08 48 8d 7b 10 49 89 fe 49 c1 ee 03 49 89
RSP: 0018:ffffc900000e75c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900000e7668 RCX: ffffffff8f3918c0
RDX: 1ffffffff1f5a0d9 RSI: ffffffff8f3918b8 RDI: ffffc900000e7670
RBP: dffffc0000000000 R08: 000000000000000d R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200001ced9 R12: ffffffff8fad06c6
R13: ffffffff8fad06ca R14: ffffffff8fad06cb R15: 1ffff9200001cece
FS: 0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005637a6b2d660 CR3: 000000000d88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1735 [inline]
slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1761
slab_free mm/slub.c:3694 [inline]
__kmem_cache_free+0xb6/0x200 mm/slub.c:3707
skb_free_head net/core/skbuff.c:762 [inline]
skb_release_data+0x5e9/0x7e0 net/core/skbuff.c:791
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
kfree_skb_reason+0x163/0x370 net/core/skbuff.c:893
kfree_skb include/linux/skbuff.h:1252 [inline]
ieee80211_iface_work+0x79c/0xc70 net/mac80211/iface.c:1767
cfg80211_wiphy_work+0x224/0x260 net/wireless/core.c:440
process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295