INFO: task syz.0.17:5943 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:24784 pid:5943 ppid:5898 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
xlog_grant_head_wait+0x35c/0x820 fs/xfs/xfs_log.c:307
xlog_grant_head_check+0x25e/0x380 include/linux/spinlock.h:-1
xfs_log_reserve+0x348/0x970 fs/xfs/xfs_log.c:486
xfs_trans_reserve+0x225/0x690 fs/xfs/xfs_trans.c:194
xfs_trans_alloc+0x3df/0x790 fs/xfs/xfs_trans.c:283
xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
xfs_attr_set+0x930/0x13e0 fs/xfs/libxfs/xfs_attr.c:1075
xfs_attr_change fs/xfs/xfs_xattr.c:117 [inline]
xfs_xattr_set+0x119/0x210 fs/xfs/xfs_xattr.c:162
__vfs_setxattr+0x431/0x470 fs/xattr.c:201
__vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235
vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322
do_setxattr fs/xattr.c:630 [inline]
path_setxattr+0x362/0x550 fs/xattr.c:659
__do_sys_setxattr fs/xattr.c:677 [inline]
__se_sys_setxattr fs/xattr.c:673 [inline]
__x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8e6f18f749
RSP: 002b:00007fff6d9fd598 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f8e6f3e5fa0 RCX: 00007f8e6f18f749
RDX: 0000200000000240 RSI: 0000200000000140 RDI: 0000200000000080
RBP: 00007f8e6f213f91 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000fe26 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e6f3e5fa0 R14: 00007f8e6f3e5fa0 R15: 0000000000000005
Showing all locks held in the system:
3 locks held by kworker/u4:1/12:
#0: ffff8880b8e3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffffc90000117d00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90000117d00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#2: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#2: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#2: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
#2: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: batadv_nc_worker+0xd2/0x610 net/batman-adv/network-coding.c:719
1 lock held by khungtaskd/29:
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
5 locks held by kworker/u4:7/3415:
2 locks held by getty/5527:
#0: ffff888030ff20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
3 locks held by syz.0.17/5943:
#0: ffff88807a2a8418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fae1a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fae1a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88807a2a8608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.1.18/5973:
#0: ffff88807999e418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fb21a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fb21a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88807999e608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.2.19/6002:
#0: ffff888061442418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fae3988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fae3988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888061442608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.3.20/6037:
#0: ffff888029dc4418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fb23988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fb23988 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888029dc4608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.4.21/6073:
#0: ffff88807b092418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fb25888 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fb25888 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88807b092608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.5.22/6108:
#0: ffff888054488418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fae5888 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fae5888 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888054488608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.6.23/6150:
#0: ffff888147348418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fae7788 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fae7788 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888147348608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.7.24/6186:
#0: ffff88805049c418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805f891a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805f891a88 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff88805049c608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
3 locks held by syz.8.25/6222:
#0: ffff888076a72418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88805fb27788 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff88805fb27788 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321
#2: ffff888076a72608 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0xb1/0x340 fs/xfs/xfs_trans.c:1190
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 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+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 167 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline]
RIP: 0010:__local_bh_disable_ip+0x91/0x190 kernel/softirq.c:333
Code: 3c 09 f3 f3 43 c6 44 3c 0b f3 65 8b 05 40 25 b2 7e a9 00 00 0f 00 0f 85 df 00 00 00 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 <4c> 8b 74 24 40 fa 65 01 1d 1a 25 b2 7e 65 8b 05 13 25 b2 7e 31 d8
RSP: 0018:ffffc90002ea78e0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000201 RCX: 0000000000000000
RDX: ffff88801aff9e00 RSI: 0000000000000201 RDI: ffffffff89dd80cf
RBP: ffffc90002ea7998 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: 1ffff920005d4f1c
R13: 1ffff1100beceb51 R14: ffffffff89dd80cf R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557236087088 CR3: 0000000018bf2000 CR4: 00000000003506e0
Call Trace:
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:125 [inline]
_raw_spin_lock_bh+0x1c/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
ieee80211_ibss_work+0xef/0x10c0 net/mac80211/ibss.c:1694
cfg80211_wiphy_work+0x225/0x260 net/wireless/core.c:437
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293