syzbot has found a reproducer for the following issue on: HEAD commit: 2d3827b3f393 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=14eb7f2b480000 kernel config: https://syzkaller.appspot.com/x/.config?x=606ed7eeab569393 dashboard link: https://syzkaller.appspot.com/bug?extid=798ffe5fe3e88235db59 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150829d7480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11ff04ab480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fd94d68ff17d/disk-2d3827b3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f304fbef0773/vmlinux-2d3827b3.xz kernel image: https://storage.googleapis.com/syzbot-assets/74eb318f51b0/Image-2d3827b3.gz.xz mounted in repro #1: https://storage.googleapis.com/syzbot-assets/37f569d9f961/mount_0.gz mounted in repro #2: https://storage.googleapis.com/syzbot-assets/0cd68cef0305/mount_1.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+798ffe5fe3e88235db59@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 0 PID: 4421 at kernel/locking/mutex.c:582 __mutex_lock_common+0x504/0xf64 kernel/locking/mutex.c:582 Modules linked in: CPU: 0 PID: 4421 Comm: syz-executor270 Not tainted 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mutex_lock_common+0x504/0xf64 kernel/locking/mutex.c:582 lr : __mutex_lock_common+0x504/0xf64 kernel/locking/mutex.c:582 sp : ffff80000ff739e0 x29: ffff80000ff73a50 x28: ffff80000eeb4000 x27: 0000000000000000 x26: 0000000000000000 x25: ffff800008748194 x24: 0000000000000002 x23: ffff800008771cc4 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c7bf7828 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000012 x12: ffff0000c3a31a00 x11: ff808000081bbb4c x10: 0000000000000000 x9 : f02dd3de9c24e500 x8 : f02dd3de9c24e500 x7 : 4e5241575f534b43 x6 : ffff80000bf650d4 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000028 Call trace: __mutex_lock_common+0x504/0xf64 kernel/locking/mutex.c:582 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 reiserfs_write_lock+0x3c/0x64 fs/reiserfs/lock.c:27 reiserfs_readdir_inode+0x9c/0x660 fs/reiserfs/dir.c:79 reiserfs_readdir+0x28/0x38 fs/reiserfs/dir.c:274 iterate_dir+0x114/0x28c __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x80/0x204 fs/readdir.c:354 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x110 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x14c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 24433 hardirqs last enabled at (24433): [<ffff800008039178>] local_daif_restore arch/arm64/include/asm/daifflags.h:75 [inline] hardirqs last enabled at (24433): [<ffff800008039178>] el0_svc_common+0x40/0x180 arch/arm64/kernel/syscall.c:107 hardirqs last disabled at (24432): [<ffff80000bf55074>] el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 softirqs last enabled at (24376): [<ffff80000801c878>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (24374): [<ffff80000801c844>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]---
