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authorPavel Skripkin <paskripkin@gmail.com>2021-06-06 17:24:05 +0300
committerDave Kleikamp <dave.kleikamp@oracle.com>2021-06-23 09:15:19 -0500
commit9d574f985fe33efd6911f4d752de6f485a1ea732 (patch)
treebde13670637ce9b35f5a79cfc22de477eb8315c7 /fs/jfs
parent492109333c29e1bb16d8732e1d597b02e8e0bf2e (diff)
jfs: fix GPF in diFree
Avoid passing inode with JFS_SBI(inode->i_sb)->ipimap == NULL to diFree()[1]. GFP will appear: struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; struct inomap *imap = JFS_IP(ipimap)->i_imap; JFS_IP() will return invalid pointer when ipimap == NULL Call Trace: diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1] jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154 evict+0x2ed/0x750 fs/inode.c:578 iput_final fs/inode.c:1654 [inline] iput.part.0+0x3fe/0x820 fs/inode.c:1680 iput+0x58/0x70 fs/inode.c:1670 Reported-and-tested-by: syzbot+0a89a7b56db04c21a656@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Diffstat (limited to 'fs/jfs')
-rw-r--r--fs/jfs/inode.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 6f65bfa9f18d..b0eb9c85eea0 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -151,7 +151,8 @@ void jfs_evict_inode(struct inode *inode)
if (test_cflag(COMMIT_Freewmap, inode))
jfs_free_zero_link(inode);
- diFree(inode);
+ if (JFS_SBI(inode->i_sb)->ipimap)
+ diFree(inode);
/*
* Free the inode from the quota allocation.