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coda: avoid flagging NULL inodes 

Somehow we hit a negative dentry in coda_rename even after checking with
d_really_is_positive.  Maybe something raced and turned the new_dentry
negative while we were fixing up directory link counts.

Link: https://lkml.kernel.org/r/20210908140308.18491-5-jaharkes@cs.cmu.edu
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Jing Yangyang <jing.yangyang@zte.com.cn>
Cc: Xin Tan <tanxin.ctf@gmail.com>
Cc: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Cc: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Harkes 2021-11-08 18:34:39 -08:00 committed by Linus Torvalds
parent b1deb685b0
commit 76097eb7a4
1 changed files with 3 additions and 0 deletions
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3
fs/coda/coda_linux.h
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@ -83,6 +83,9 @@ static __inline__ void coda_flag_inode(struct inode *inode, int flag)
{
struct coda_inode_info *cii = ITOC(inode);
if (!inode)
return;
spin_lock(&cii->c_lock);
cii->c_flags |= flag;
spin_unlock(&cii->c_lock);