INFO: task syz.2.492:7704 blocked for more than 143 seconds.
Not tainted 6.14.0-syzkaller-10764-gaa918db707fb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.492 state:D stack:26824 pid:7704 tgid:7703 ppid:5822 task_flags:0x4c0140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_read_slowpath+0x62f/0xb60 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0xef/0x480 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
page_cache_ra_order+0x322/0xd00 mm/readahead.c:491
page_cache_sync_ra+0x4b4/0x9c0 mm/readahead.c:621
filemap_get_pages+0xb62/0x1c20 mm/filemap.c:2602
filemap_read+0x3d2/0xe90 mm/filemap.c:2713
blkdev_read_iter+0x190/0x4d0 block/fops.c:796
do_iter_readv_writev+0x735/0x950 fs/read_write.c:823
vfs_readv+0x4c5/0x8a0 fs/read_write.c:1016
do_preadv+0x1af/0x270 fs/read_write.c:1130
__do_sys_preadv2 fs/read_write.c:1189 [inline]
__se_sys_preadv2 fs/read_write.c:1180 [inline]
__x64_sys_preadv2+0xef/0x160 fs/read_write.c:1180
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5cc898d169
RSP: 002b:00007f5cc9878038 EFLAGS: 00000246 ORIG_RAX: 0000000000000147
RAX: ffffffffffffffda RBX: 00007f5cc8ba5fa0 RCX: 00007f5cc898d169
RDX: 0000000000000001 RSI: 0000200000000080 RDI: 0000000000000005
RBP: 00007f5cc8a0e2a0 R08: 0000000000000004 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5cc8ba5fa0 R15: 00007ffd0f6557a8
Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
#0: ffff8880b8439dd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:613 [inline]
#0: ffff8880b8439dd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:598
5 locks held by kworker/1:0/24:
#0: ffff888021ef9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc900001e7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2: ffff888029792190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#2: ffff888029792190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x4fa0 drivers/usb/core/hub.c:5861
#3: ffff8880351f0190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff8880351f0190 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7e/0x4b0 drivers/base/dd.c:1005
#4: ffff88807f464160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff88807f464160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7e/0x4b0 drivers/base/dd.c:1005
1 lock held by khungtaskd/31:
#0: ffffffff8e3bef00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e3bef00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e3bef00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6761
2 locks held by getty/5574:
#0: ffff888032e640a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900033332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfa1/0x1450 drivers/tty/n_tty.c:2211
1 lock held by syz.4.364/7243:
4 locks held by udevd/7377:
#0: ffff88803151f0a0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182
#1: ffff8880469cf088 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888035de52d8 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff8880351f0190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff8880351f0190 (&dev->mutex){....}-{4:4}, at: uevent_show+0x187/0x3b0 drivers/base/core.c:2730
1 lock held by syz.2.492/7704:
#0: ffff888148c5a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148c5a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x322/0xd00 mm/readahead.c:491
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-syzkaller-10764-gaa918db707fb #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:399
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7243 Comm: syz.4.364 Not tainted 6.14.0-syzkaller-10764-gaa918db707fb #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:memset_orig+0x3a/0xb0 arch/x86/lib/memset_64.S:70
Code: 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 47 30 48 89
RSP: 0018:ffffc9000324f9d8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000029
RDX: 0000000000001000 RSI: 0000000000000000 RDI: ffff888035f6c980
RBP: ffffc9000324fa38 R08: 0000000000000001 R09: 0000000000000000
R10: ffff888035f6c400 R11: 0000000000000000 R12: ffff888140af1780
R13: 0000000000092880 R14: 0000000000001000 R15: 0000000000000001
FS: 00007f735e17d6c0(0000) GS:ffff8881249d6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f061a719f98 CR3: 000000007f0f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
slab_post_alloc_hook mm/slub.c:4141 [inline]
slab_alloc_node mm/slub.c:4187 [inline]
kmem_cache_alloc_noprof+0x1e6/0x3b0 mm/slub.c:4194
mempool_alloc_noprof+0x176/0x390 mm/mempool.c:402
bvec_alloc+0x192/0x210 block/bio.c:210
bio_alloc_bioset+0x4b4/0x8b0 block/bio.c:569
bio_alloc include/linux/bio.h:371 [inline]
__blkdev_issue_zero_pages+0xa0/0x350 block/blk-lib.c:203
blkdev_issue_zero_pages block/blk-lib.c:238 [inline]
blkdev_issue_zeroout+0x3ab/0x840 block/blk-lib.c:325
blkdev_fallocate+0x2fd/0x380 block/fops.c:852
vfs_fallocate+0x608/0x10b0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x150 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f735d38d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f735e17d038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f735d5a5fa0 RCX: 00007f735d38d169
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000009
RBP: 00007f735d40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0040000000000203 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f735d5a5fa0 R15: 00007ffc8327d908
IPVS: lc: UDP 224.0.0.2:0 - no destination available
IPVS: lc: UDP 224.0.0.2:0 - no destination available