INFO: task syz.0.16:6552 blocked for more than 143 seconds.
Not tainted 6.15.0-syzkaller-13659-g5b032cac6225 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:23576 pid:6552 tgid:6551 ppid:6454 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:867 [inline]
vfs_rename+0x6d2/0xec0 fs/namei.c:5093
do_renameat2+0x878/0xc50 fs/namei.c:5277
__do_sys_renameat2 fs/namei.c:5311 [inline]
__se_sys_renameat2 fs/namei.c:5308 [inline]
__x64_sys_renameat2+0xce/0xe0 fs/namei.c:5308
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f104f18e169
RSP: 002b:00007f104fff3038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f104f3b5fa0 RCX: 00007f104f18e169
RDX: 0000000000000004 RSI: 0000200000000240 RDI: 0000000000000004
RBP: 00007f104f210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f104f3b5fa0 R15: 00007ffda24504a8
INFO: task syz.1.17:6744 blocked for more than 143 seconds.
Not tainted 6.15.0-syzkaller-13659-g5b032cac6225 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.17 state:D stack:25160 pid:6744 tgid:6743 ppid:6724 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:867 [inline]
vfs_rename+0x6d2/0xec0 fs/namei.c:5093
do_renameat2+0x878/0xc50 fs/namei.c:5277
__do_sys_renameat2 fs/namei.c:5311 [inline]
__se_sys_renameat2 fs/namei.c:5308 [inline]
__x64_sys_renameat2+0xce/0xe0 fs/namei.c:5308
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd28a58e169
RSP: 002b:00007fd28b434038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fd28a7b5fa0 RCX: 00007fd28a58e169
RDX: 0000000000000004 RSI: 0000200000000240 RDI: 0000000000000004
RBP: 00007fd28a610a68 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd28a7b5fa0 R15: 00007ffe124e0e08
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f060 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by klogd/5183:
#0: ffff8880b863b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
#1: ffff8880b8623f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
2 locks held by getty/5583:
#0: ffff888030a550a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
6 locks held by syz.0.16/6552:
#0: ffff888032f06428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888032f06738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888032f06738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad28910 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad28910 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ad2a2d0 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ad2a2d0 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ad28f80 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ad28f80 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ad2a2d0 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ad2a2d0 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.1.17/6744:
#0: ffff88807aa0e428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88807aa0e738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88807aa0e738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad2afb0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad2afb0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ad2c970 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ad2c970 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ad2b620 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ad2b620 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ad2c970 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ad2c970 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.2.18/6767:
#0: ffff88807b782428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88807b782738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88807b782738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad482a0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad482a0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ad49c60 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ad49c60 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ad48910 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ad48910 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ad49c60 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ad49c60 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.3.19/6795:
#0: ffff88803231e428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88803231e738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88803231e738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad4a2d0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad4a2d0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ad4bc90 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ad4bc90 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ad4a940 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ad4a940 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ad4bc90 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ad4bc90 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.4.20/6824:
#0: ffff888027d62428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888027d62738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888027d62738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad2e330 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad2e330 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff8880747002a0 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff8880747002a0 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ad2e9a0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ad2e9a0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff8880747002a0 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff8880747002a0 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.5.21/6852:
#0: ffff88803104a428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88803104a738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88803104a738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad4c970 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad4c970 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ad4e330 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ad4e330 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ad4cfe0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ad4cfe0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ad4e330 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ad4e330 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.6.22/6883:
#0: ffff88801afb4428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88801afb4738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88801afb4738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ad4f010 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ad4f010 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff888074701c60 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff888074701c60 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff888074700910 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff888074700910 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff888074701c60 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff888074701c60 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.7.23/6915:
#0: ffff888057e2c428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888057e2c738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888057e2c738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ae002a0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ae002a0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ae01c60 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ae01c60 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ae00910 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ae00910 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ae01c60 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ae01c60 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
6 locks held by syz.8.24/6945:
#0: ffff888143710428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888143710738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888143710738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff888074702940 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff888074702940 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff888074704300 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff888074704300 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff888074702fb0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff888074702fb0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff888074704300 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff888074704300 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
2 locks held by kworker/u8:5/6962:
#0: ffff8880b863b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
#1: ffff8880b8623f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
6 locks held by syz.9.25/6974:
#0: ffff88807a660428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88807a660738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88807a660738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5223
#2: ffff88805ae02940 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff88805ae02940 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x1a2/0x220 fs/namei.c:3252
#3: ffff88805ae04300 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#3: ffff88805ae04300 (&sb->s_type->i_mutex_key#20/5){+.+.}-{4:4}, at: lock_two_directories+0x1cc/0x220 fs/namei.c:3253
#4: ffff88805ae02fb0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#4: ffff88805ae02fb0 (&sb->s_type->i_mutex_key#20/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5091
#5: ffff88805ae04300 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff88805ae04300 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: vfs_rename+0x6d2/0xec0 fs/namei.c:5093
2 locks held by dhcpcd/6975:
#0: ffff888054cbe258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline]
#0: ffff888054cbe258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0 net/packet/af_packet.c:3252
#1: ffffffff8e144b78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#1: ffffffff8e144b78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:998
2 locks held by dhcpcd/6976:
#0: ffff88805b552258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline]
#0: ffff88805b552258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0 net/packet/af_packet.c:3252
#1: ffffffff8e144b78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#1: ffffffff8e144b78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-syzkaller-13659-g5b032cac6225 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
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: 1114 Comm: kworker/u8:6 Not tainted 6.15.0-syzkaller-13659-g5b032cac6225 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:146 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:153 [inline]
RIP: 0010:lock_release+0x29a/0x3e0 kernel/locking/lockdep.c:5895
Code: c7 90 9a b5 8d e8 16 ac c0 09 b8 ff ff ff ff 65 0f c1 05 09 c9 fb 10 83 f8 01 75 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b
RSP: 0018:ffffc90003cff678 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000202 RCX: afabed95e5b16800
RDX: 0000000000000005 RSI: ffffffff8db59a90 RDI: ffffffff8be1ae80
RBP: ffff88802718a9b8 R08: ffff88801a47b063 R09: 1ffff1100348f60c
R10: dffffc0000000000 R11: ffffed100348f60d R12: 0000000000000005
R13: 0000000000000005 R14: ffffffff8e13f060 R15: ffff888027189e00
FS: 0000000000000000(0000) GS:ffff888125c84000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005620b9983168 CR3: 000000000df38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
pte_unmap include/linux/pgtable.h:136 [inline]
__text_poke+0x83e/0xa10 arch/x86/kernel/alternative.c:2535
text_poke arch/x86/kernel/alternative.c:2559 [inline]
smp_text_poke_batch_finish+0xd0a/0x1100 arch/x86/kernel/alternative.c:2948
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xc5/0x1b0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate+0x1a1/0x240 mm/kfence/core.c:855
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245