f2fs_ioc_shutdown() ioctl gets stuck in the below path
when going down with full sync (F2FS_GOING_DOWN_FULLSYNC)
option.
__switch_to+0x90/0xc4
percpu_down_write+0x8c/0xc0
freeze_super+0xec/0x1e4
freeze_bdev+0xc4/0xcc
f2fs_ioctl+0xc0c/0x1ce0
f2fs_compat_ioctl+0x98/0x1f0
Fix this by not holding write access during this ioctl.
Signed-off-by: Sahitya Tummala <stumm...@codeaurora.org>
---
fs/f2fs/file.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b926df7..2c2e61b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1835,10 +1835,6 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned
long arg)
if (get_user(in, (__u32 __user *)arg))
return -EFAULT;
- ret = mnt_want_write_file(filp);
- if (ret)
- return ret;
-
switch (in) {
case F2FS_GOING_DOWN_FULLSYNC:
sb = freeze_bdev(sb->s_bdev);
@@ -1878,7 +1874,6 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned
long arg)
f2fs_update_time(sbi, REQ_TIME);
out:
- mnt_drop_write_file(filp);
return ret;
}
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
Foundation Collaborative Project.
