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| author | Amir Goldstein <amir73il@gmail.com> | 2018-05-14 05:54:44 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-05-14 05:54:44 +0300 |
| commit | db6516a5e7ddb6dc72d167b920f2f272596ea22d (patch) | |
| tree | ce820da46d4ef3e3f6f0a688f326d408ba8c506f /drivers/fpga/machxo2-spi.c | |
| parent | 833a950882d33a7dfc319d5e152fdf35028936eb (diff) | |
| download | linux-db6516a5e7ddb6dc72d167b920f2f272596ea22d.tar.xz | |
ext4: do not update s_last_mounted of a frozen fs
If fs is frozen after mount and before the first file open, the
update of s_last_mounted bypasses freeze protection and prints out
a WARNING splat:
$ mount /vdf
$ fsfreeze -f /vdf
$ cat /vdf/foo
[ 31.578555] WARNING: CPU: 1 PID: 1415 at
fs/ext4/ext4_jbd2.c:53 ext4_journal_check_start+0x48/0x82
[ 31.614016] Call Trace:
[ 31.614997] __ext4_journal_start_sb+0xe4/0x1a4
[ 31.616771] ? ext4_file_open+0xb6/0x189
[ 31.618094] ext4_file_open+0xb6/0x189
If fs is frozen, skip s_last_mounted update.
[backport hint: to apply to stable tree, need to apply also patches
vfs: add the sb_start_intwrite_trylock() helper
ext4: factor out helper ext4_sample_last_mounted()]
Cc: stable@vger.kernel.org
Fixes: bc0b0d6d69ee ("ext4: update the s_last_mounted field in the superblock")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'drivers/fpga/machxo2-spi.c')
0 files changed, 0 insertions, 0 deletions