INFO: task syz.0.17:4351 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:29088 pid: 4351 ppid: 4299 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
inode_lock include/linux/fs.h:787 [inline]
ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
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: 0033:0x7f2b4962d749
RSP: 002b:00007f2b48c7b038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f2b49884090 RCX: 00007f2b4962d749
RDX: 000000000000000a RSI: 0000000000000001 RDI: 0000000000000006
RBP: 00007f2b496b1f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2b49884128 R14: 00007f2b49884090 R15: 00007ffdff0255e8
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c11c720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:3/155:
2 locks held by getty/3941:
#0: ffff88814d352098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
3 locks held by syz.0.17/4350:
2 locks held by syz.0.17/4351:
#0: ffff888074c44460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff888074c44460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806946f240 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806946f240 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
4 locks held by syz.1.18/4396:
2 locks held by syz.1.18/4397:
#0: ffff888076202460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff888076202460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806964eae0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806964eae0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
7 locks held by syz.2.19/4424:
2 locks held by syz.2.19/4425:
#0: ffff8880252ce460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff8880252ce460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff8880694d7240 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff8880694d7240 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
4 locks held by syz.3.20/4447:
2 locks held by syz.3.20/4448:
#0: ffff88807d9ec460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff88807d9ec460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806f4ee380 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806f4ee380 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
3 locks held by syz.4.21/4476:
2 locks held by syz.4.21/4477:
#0: ffff88805aac8460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff88805aac8460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806f6699c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806f6699c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
4 locks held by syz.5.22/4513:
2 locks held by syz.5.22/4514:
#0: ffff88807a800460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff88807a800460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806f4eafe0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806f4eafe0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
3 locks held by syz.6.23/4544:
2 locks held by syz.6.23/4545:
#0: ffff88807f1d6460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff88807f1d6460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806946a880 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806946a880 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
4 locks held by syz.7.24/4574:
2 locks held by syz.7.24/4575:
#0: ffff888057418460 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3043 [inline]
#0: ffff888057418460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x4f4/0x6f0 fs/open.c:307
#1: ffff88806f66a880 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88806f66a880 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_fallocate+0x1a9/0xcc0 fs/ntfs3/file.c:558
=============================================
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 10/25/2025
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: 145 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: phy14 ieee80211_iface_work
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:59 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:178 [inline]
RIP: 0010:unwind_next_frame+0x247/0x1d90 arch/x86/kernel/unwind_orc.c:448
Code: 87 a5 14 00 00 45 39 e0 0f 84 6c 01 00 00 4a 8d 14 a5 1c 1a 74 8d 45 29 e0 4e 8d 64 82 fc 49 89 d7 4c 39 e2 0f 86 df 0d 00 00 <49> 29 d7 eb 66 48 89 ef e8 8c 62 1a 00 85 c0 74 7d 49 c7 c7 1c 1a
RSP: 0018:ffffc900016ef328 EFLAGS: 00000202
RAX: ffffffff8d741ee0 RBX: ffffc900016ef3e8 RCX: ffffffff8d741ee8
RDX: ffffffff8d741edc RSI: ffffffff8dddc43c RDI: ffffffff8134794c
RBP: ffffffff8100460e R08: 0000000000000007 R09: 000000000000000b
R10: fffff520002dde89 R11: 1ffff920002dde87 R12: ffffffff8d741ee0
R13: ffffffff8d741ee4 R14: ffffffff8d741ee4 R15: ffffffff8d741ee0
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f77f2d16e80 CR3: 000000005ddef000 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+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1710 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kfree+0xef/0x2a0 mm/slub.c:4564
ieee80211_bss_info_update+0x86e/0xaa0 net/mac80211/scan.c:232
ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline]
ieee80211_ibss_rx_queued_mgmt+0x16d0/0x29c0 net/mac80211/ibss.c:1643
ieee80211_iface_process_skb net/mac80211/iface.c:1459 [inline]
ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1513
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287