linux-kernel - [syzbot] [jfs?] INFO: task hung in __get

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Message-ID: <0000000000009033c40612fbd20f@google.com>
Date: Wed, 06 Mar 2024 02:57:19 -0800
From: syzbot <syzbot+72feb48a17265d9bf496@...kaller.appspotmail.com>
To: jfs-discussion@...ts.sourceforge.net, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, shaggy@...nel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [jfs?] INFO: task hung in __get_metapage (2)

Hello,

syzbot found the following issue on:

HEAD commit:    9910665503b3 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=12413316180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2402d46ab3c7e581
dashboard link: https://syzkaller.appspot.com/bug?extid=72feb48a17265d9bf496
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=129fb526180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12c40bba180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/16059f53446c/disk-99106655.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7fc6c7c495d5/vmlinux-99106655.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d8b0ce53ea33/Image-99106655.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/1d3700eeba9f/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+72feb48a17265d9bf496@...kaller.appspotmail.com

INFO: task jfsCommit:94 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc6-syzkaller-g9910665503b3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit       state:D stack:0     pid:94    tgid:94    ppid:2      flags:0x00000008
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x1498/0x24b4 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xb8/0x19c kernel/sched/core.c:6817
 io_schedule+0x8c/0x12c kernel/sched/core.c:9023
 __lock_metapage+0x1cc/0x458 fs/jfs/jfs_metapage.c:50
 lock_metapage fs/jfs/jfs_metapage.c:64 [inline]
 __get_metapage+0x96c/0x1050 fs/jfs/jfs_metapage.c:639
 diIAGRead+0xe4/0x14c fs/jfs/jfs_imap.c:2669
 diFree+0x800/0x2648 fs/jfs/jfs_imap.c:956
 jfs_evict_inode+0x2d0/0x3f4 fs/jfs/inode.c:156
 evict+0x260/0x68c fs/inode.c:665
 iput_final fs/inode.c:1739 [inline]
 iput+0x734/0x818 fs/inode.c:1765
 txUpdateMap+0x73c/0x8e4 fs/jfs/jfs_txnmgr.c:2367
 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
 jfs_lazycommit+0x3a4/0x98c fs/jfs/jfs_txnmgr.c:2733
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffff80008ee73f40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297
2 locks held by jfsCommit/94:
 #0: ffff0000d8558920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2cc/0x2648 fs/jfs/jfs_imap.c:886
 #1: ffff0000ddd3a638 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2e0/0x2648 fs/jfs/jfs_imap.c:891
2 locks held by getty/5932:
 #0: ffff0000d35540a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800094f722f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201
3 locks held by syz-executor149/7710:

=============================================



---
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