INFO: task syz-executor.1:4830 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.1 state:D stack:26880 pid: 4830 ppid: 4495 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x263/0x4d0 block/fops.c:603
vfs_fallocate+0x587/0x6f0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f222ccfb8d9
RSP: 002b:00007f222c07d0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f222ce1af80 RCX: 00007f222ccfb8d9
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f222cd57b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f222ce1af80 R15: 00007ffe166b4468
INFO: task syz-executor.4:4836 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.4 state:D stack:27872 pid: 4836 ppid: 4496 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x263/0x4d0 block/fops.c:603
vfs_fallocate+0x587/0x6f0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1cedee68d9
RSP: 002b:00007f1ced2680c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f1cee005f80 RCX: 00007f1cedee68d9
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f1cedf42b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1cee005f80 R15: 00007ffe11059838
INFO: task syz-executor.2:4843 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27872 pid: 4843 ppid: 4484 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x263/0x4d0 block/fops.c:603
vfs_fallocate+0x587/0x6f0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3f2f5598d9
RSP: 002b:00007f3f2e8db0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f3f2f678f80 RCX: 00007f3f2f5598d9
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f3f2f5b5b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3f2f678f80 R15: 00007ffc33a01938
INFO: task syz-executor.5:4856 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27872 pid: 4856 ppid: 4497 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x263/0x4d0 block/fops.c:603
vfs_fallocate+0x587/0x6f0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f90e19248d9
RSP: 002b:00007f90e0ca60c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f90e1a43f80 RCX: 00007f90e19248d9
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f90e1980b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f90e1a43f80 R15: 00007ffe6cb0d6c8
Showing all locks held in the system:
1 lock held by ksoftirqd/1/20:
1 lock held by khungtaskd/27:
#0: ffffffff8c11c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3950:
#0: ffff88802c457098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900021ce2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
1 lock held by syz-executor.0/4797:
3 locks held by kworker/u4:6/4796:
1 lock held by syz-executor.1/4830:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.4/4836:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.2/4843:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.5/4856:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.3/5089:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.0/5097:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
2 locks held by napi/wg2-0/5113:
#0: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
#1: ffff8880b9127848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4d6/0x810 kernel/sched/psi.c:891
1 lock held by syz-executor.1/5139:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.4/5149:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.2/5153:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.5/5155:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.3/5203:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.0/5214:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.1/5253:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.4/5288:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.2/5299:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
1 lock held by syz-executor.5/5301:
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888016cb4ff8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x263/0x4d0 block/fops.c:603
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3551 Comm: klogd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__kasan_check_read+0x0/0x10 mm/kasan/shadow.c:31
Code: 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 c7 22 57 b8 8b eb 0a 48 c7 c7 c4 68 a2 8b 48 89 de e8 e8 85 e1 07 31 ed eb d7 00 00 cc cc <89> f6 48 8b 0c 24 31 d2 e9 43 ef ff ff 0f 1f 00 89 f6 48 8b 0c 24
RSP: 0018:ffffc90002eef390 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea000140a800 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea000140a830
RBP: 0000000000000003 R08: dffffc0000000000 R09: fffff9400028153f
R10: fffff9400028153f R11: 1ffffd400028153e R12: ffffea000140a830
R13: 1ffffd4000281503 R14: 00000000000502a0 R15: ffffea000140a818
FS: 00007f3e438a4c80(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563d89fb4270 CR3: 000000002ad8d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
page_expected_state mm/page_alloc.c:1160 [inline]
check_free_page mm/page_alloc.c:1205 [inline]
free_pages_prepare mm/page_alloc.c:1334 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xe9/0x6c0 mm/page_alloc.c:3317
free_unref_page+0x94/0x280 mm/page_alloc.c:3396
free_slab mm/slub.c:2015 [inline]
discard_slab mm/slub.c:2021 [inline]
__unfreeze_partials+0x1a5/0x200 mm/slub.c:2507
put_cpu_partial+0x12d/0x190 mm/slub.c:2587
qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
kmem_cache_alloc_node+0x12d/0x2d0 mm/slub.c:3256
__alloc_skb+0xf4/0x750 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1162 [inline]
alloc_skb_with_frags+0xa7/0x730 net/core/skbuff.c:6170
sock_alloc_send_pskb+0x853/0x980 net/core/sock.c:2531
unix_dgram_sendmsg+0x5ef/0x1890 net/unix/af_unix.c:1809
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
__sys_sendto+0x423/0x580 net/socket.c:2063
__do_sys_sendto net/socket.c:2075 [inline]
__se_sys_sendto net/socket.c:2071 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2071
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3e439f4407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe6f027aa0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3e438a4c80 RCX: 00007f3e439f4407
RDX: 000000000000006a RSI: 00007ffe6f027be0 RDI: 0000000000000003
RBP: 00007ffe6f028010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffe6f028028
R13: 00007ffe6f027be0 R14: 000000000000004f R15: 00007ffe6f027be0