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authorZeng Heng <zengheng4@huawei.com>2022-10-19 00:38:14 +0300
committerDarrick J. Wong <djwong@kernel.org>2022-10-20 19:42:56 +0300
commitcf4f4c12dea7a977a143c8fe5af1740b7f9876f8 (patch)
treeb926076e1bfddba20c94b6f2caf480f5e5ff68f0 /fs/xfs/xfs_error.c
parentfc93812c725068e6a491ce574f058a4530130c00 (diff)
downloadlinux-cf4f4c12dea7a977a143c8fe5af1740b7f9876f8.tar.xz
xfs: fix memory leak in xfs_errortag_init
When `xfs_sysfs_init` returns failed, `mp->m_errortag` needs to free. Otherwise kmemleak would report memory leak after mounting xfs image: unreferenced object 0xffff888101364900 (size 192): comm "mount", pid 13099, jiffies 4294915218 (age 335.207s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000f08ad25c>] __kmalloc+0x41/0x1b0 [<00000000dca9aeb6>] kmem_alloc+0xfd/0x430 [<0000000040361882>] xfs_errortag_init+0x20/0x110 [<00000000b384a0f6>] xfs_mountfs+0x6ea/0x1a30 [<000000003774395d>] xfs_fs_fill_super+0xe10/0x1a80 [<000000009cf07b6c>] get_tree_bdev+0x3e7/0x700 [<00000000046b5426>] vfs_get_tree+0x8e/0x2e0 [<00000000952ec082>] path_mount+0xf8c/0x1990 [<00000000beb1f838>] do_mount+0xee/0x110 [<000000000e9c41bb>] __x64_sys_mount+0x14b/0x1f0 [<00000000f7bb938e>] do_syscall_64+0x3b/0x90 [<000000003fcd67a9>] entry_SYSCALL_64_after_hwframe+0x63/0xcd Fixes: c68401011522 ("xfs: expose errortag knobs via sysfs") Signed-off-by: Zeng Heng <zengheng4@huawei.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/xfs_error.c')
-rw-r--r--fs/xfs/xfs_error.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index 7db588ed0be5..c6b2aabd6f18 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -234,13 +234,18 @@ int
xfs_errortag_init(
struct xfs_mount *mp)
{
+ int ret;
+
mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
KM_MAYFAIL);
if (!mp->m_errortag)
return -ENOMEM;
- return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
- &mp->m_kobj, "errortag");
+ ret = xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
+ &mp->m_kobj, "errortag");
+ if (ret)
+ kmem_free(mp->m_errortag);
+ return ret;
}
void