From: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
WARNING: CPU: 12 PID: 898592 at fs/super.c:1120 kill_block_super+0x63/0x70
Call Trace:
[<ffffffff816a02f8>] dump_stack+0x19/0x1b
[<ffffffff81088be8>] __warn+0xd8/0x100
[<ffffffff81088d2d>] warn_slowpath_null+0x1d/0x20
[<ffffffff8121dfa3>] kill_block_super+0x63/0x70
[<ffffffffc04891ec>] ext4_kill_sb+0x4c/0x60 [ext4]
[<ffffffff8121e499>] deactivate_locked_super+0x49/0x80
[<ffffffff8121efd7>] mount_bdev+0x227/0x240
[<ffffffffc048f330>] ? ext4_calculate_overhead+0x430/0x430 [ext4]
[<ffffffffc0489f34>] ext4_mount+0x44/0x60 [ext4]
[<ffffffff8121fb35>] mount_fs+0x15/0xc0
[<ffffffff8123c757>] vfs_kern_mount+0x67/0x110
[<ffffffff8123efb9>] do_mount+0x219/0xae0
[<ffffffff8123fbc6>] SyS_mount+0x96/0xf0
[<ffffffff816b1649>] system_call_fastpath+0x16/0x1b
On 3.10.0-693.1.1.vz7.37.30 kernel.
We warn on no FMODE_EXCL on super block at kill_block_super. We get
there from ve_devmnt_process's error path in mount_bdev, here we have
yet uninitialized sb, thus it's s_mode has no FMODE_EXCL. So lets move
s_mode initialization before these error path.
Fixes commit 0759581712eb ("ve/fs/devmnt: process mount options")
https://jira.sw.ru/browse/PSBM-80743
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
Reviewed-by: Kirill Tkhai <ktk...@virtuozzo.com>
(cherry picked from commit 3543274fc3f1ce483a075ce4cb7a097c7c2d2169)
VZ 8 rebase part https://jira.sw.ru/browse/PSBM-127837
Signed-off-by: Alexander Mikhalitsyn <alexander.mikhalit...@virtuozzo.com>
---
fs/super.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/super.c b/fs/super.c
index 9fda135ee564..ca7863c56079 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1191,7 +1191,10 @@ struct dentry *mount_bdev(struct file_system_type
*fs_type,
#ifdef CONFIG_VE
void *data_orig = data;
struct ve_struct *ve = get_exec_env();
+#endif
+ s->s_mode = mode;
+#ifdef CONFIG_VE
if (!ve_is_super(ve)) {
error = ve_devmnt_process(ve, bdev->bd_dev, &data, 0);
if (error) {
@@ -1200,7 +1203,6 @@ struct dentry *mount_bdev(struct file_system_type
*fs_type,
}
}
#endif
- s->s_mode = mode;
snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev);
sb_set_blocksize(s, block_size(bdev));
error = fill_super(s, data, flags & SB_SILENT ? 1 : 0);
--
2.28.0
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