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Message-ID: <6726436d.050a0220.529b6.02d2.GAE@google.com>
Date: Sat, 02 Nov 2024 08:21:17 -0700
From: syzbot <syzbot+8036326eebe7d0140944@...kaller.appspotmail.com>
To: chao@...nel.org, dmitry.kasatkin@...il.com, eric.snowberg@...cle.com,
jmorris@...ei.org, linux-erofs@...ts.ozlabs.org,
linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-security-module@...r.kernel.org, paul@...l-moore.com,
roberto.sassu@...wei.com, serge@...lyn.com, syzkaller-bugs@...glegroups.com,
xiang@...nel.org, zohar@...ux.ibm.com
Subject: [syzbot] [integrity?] [lsm?] [erofs?] INFO: task hung in
ima_file_free (4)
Hello,
syzbot found the following issue on:
HEAD commit: e42b1a9a2557 Merge tag 'spi-fix-v6.12-rc5' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=150d4a30580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4aec7739e14231a7
dashboard link: https://syzkaller.appspot.com/bug?extid=8036326eebe7d0140944
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15901ca7980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15fc815f980000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-e42b1a9a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3e2253169da8/vmlinux-e42b1a9a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b9d2f5008f24/bzImage-e42b1a9a.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/bc2284f99b09/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8036326eebe7d0140944@...kaller.appspotmail.com
INFO: task syz-executor688:5342 blocked for more than 143 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor688 state:D stack:25920 pid:5342 tgid:5342 ppid:5339 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
ima_check_last_writer security/integrity/ima/ima_main.c:166 [inline]
ima_file_free+0x17f/0x4d0 security/integrity/ima/ima_main.c:205
security_file_release+0x92/0x140 security/security.c:2873
__fput+0x1ae/0x880 fs/file_table.c:425
__do_sys_close fs/open.c:1567 [inline]
__se_sys_close fs/open.c:1552 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1552
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd7dd29cdda
RSP: 002b:00007ffd572b6bd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fd7dd29cdda
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000032 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fd7dd32560c
R13: 0000000000000009 R14: 0000000000040e1f R15: 0000000000040e51
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/25:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/5108:
#0: ffff88801fa510a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000039b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor688/5342:
#0: ffff88803f594398 (&ima_iint_mutex_key[depth]#2){+.+.}-{3:3}, at: ima_check_last_writer security/integrity/ima/ima_main.c:166 [inline]
#0: ffff88803f594398 (&ima_iint_mutex_key[depth]#2){+.+.}-{3:3}, at: ima_file_free+0x17f/0x4d0 security/integrity/ima/ima_main.c:205
1 lock held by syz-executor688/5343:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
---
This report is generated by a bot. It may contain errors.
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