linux-ext4 - [bug report] e2fsck: The process is deadlocked

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Date:   Wed, 9 Nov 2022 18:40:31 +0800
From:   zhanchengbin <zhanchengbin1@...wei.com>
To:     Theodore Ts'o <tytso@....edu>
CC:     <linux-ext4@...r.kernel.org>, linfeilong <linfeilong@...wei.com>,
        <liuzhiqiang26@...wei.com>
Subject: [bug report] e2fsck: The process is deadlocked

Hi Tytso,
The process is deadlocked, and an I/O error occurs when logs
are replayed. Because in the I/O error handling function, I/O
is sent again and catch the mutexlock.
stack:
(gdb) bt
#0  0x0000ffffa740bc34 in ?? () from /usr/lib64/libc.so.6
#1  0x0000ffffa7412024 in pthread_mutex_lock () from /usr/lib64/libc.so.6
#2  0x0000ffffa7654e54 in mutex_lock (kind=CACHE_MTX, 
data=0xaaaaf5c98f30) at unix_io.c:151
#3  unix_write_blk64 (channel=0xaaaaf5c98e60, block=2, count=4, 
buf=0xaaaaf5c9d170) at unix_io.c:1092
#4  0x0000ffffa762e610 in ext2fs_flush2 (flags=0, fs=0xaaaaf5c98cc0) at 
closefs.c:401
#5  ext2fs_flush2 (fs=0xaaaaf5c98cc0, flags=0) at closefs.c:279
#6  0x0000ffffa762eb14 in ext2fs_close2 (fs=fs@...ry=0xaaaaf5c98cc0, 
flags=flags@...ry=0) at closefs.c:510
#7  0x0000ffffa762eba4 in ext2fs_close_free 
(fs_ptr=fs_ptr@...ry=0xffffc8cbab30) at closefs.c:472
#8  0x0000aaaadcc39bd8 in preenhalt (ctx=ctx@...ry=0xaaaaf5c98460) at 
util.c:365
#9  0x0000aaaadcc3bc5c in e2fsck_handle_write_error (channel=<optimized 
out>, block=262152, count=<optimized out>, data=<optimized out>, 
size=<optimized out>, actual=<optimized out>, error=5)
     at ehandler.c:114
#10 0x0000ffffa7655044 in reuse_cache (block=262206, 
cache=0xaaaaf5c98f80, data=0xaaaaf5c98f30, channel=0xaaaaf5c98e60) at 
unix_io.c:583
#11 unix_write_blk64 (channel=0xaaaaf5c98e60, block=262206, 
count=<optimized out>, buf=<optimized out>) at unix_io.c:1097
#12 0x0000aaaadcc3702c in ll_rw_block (rw=rw@...ry=1, 
op_flags=op_flags@...ry=0, nr=<optimized out>, nr@...ry=1, 
bhp=0xffffc8cbac60, bhp@...ry=0xffffc8cbac58) at journal.c:184
#13 0x0000aaaadcc375e8 in brelse (bh=<optimized out>, 
bh@...ry=0xaaaaf5cac4a0) at journal.c:217
#14 0x0000aaaadcc3ebe0 in do_one_pass 
(journal=journal@...ry=0xaaaaf5c9f590, info=info@...ry=0xffffc8cbad60, 
pass=pass@...ry=PASS_REPLAY) at recovery.c:693
#15 0x0000aaaadcc3ee74 in jbd2_journal_recover (journal=0xaaaaf5c9f590) 
at recovery.c:310
#16 0x0000aaaadcc386a8 in recover_ext3_journal (ctx=0xaaaaf5c98460) at 
journal.c:1653
#17 e2fsck_run_ext3_journal (ctx=0xaaaaf5c98460) at journal.c:1706
#18 0x0000aaaadcc207e0 in main (argc=<optimized out>, argv=<optimized 
out>) at unix.c:1791