Re: [PATCH] ceph: fix variable dereferenced before check in ceph_umount_begin()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Mar 28, 2025 at 11:33:59AM -0700, Viacheslav Dubeyko wrote:
> This patch moves pointer check before the first
> dereference of the pointer.
> 
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Closes: https://urldefense.proofpoint.com/v2/url?u=https-3A__lore.kernel.org_r_202503280852.YDB3pxUY-2Dlkp-40intel.com_&d=DwIBAg&c=BSDicqBQBDjDI9RkVyTcHQ&r=q5bIm4AXMzc8NJu1_RGmnQ2fMWKq4Y4RAkElvUgSs00&m=Ud7uNdqBY_Z7LJ_oI4fwdhvxOYt_5Q58tpkMQgDWhV3199_TCnINFU28Esc0BaAH&s=QOKWZ9HKLyd6XCxW-AUoKiFFg9roId6LOM01202zAk0&e=

Ooh, that's not good.  Need to figure out a way to defeat the proofpoint
garbage.

> diff --git a/fs/ceph/super.c b/fs/ceph/super.c
> index f3951253e393..6cbc33c56e0e 100644
> --- a/fs/ceph/super.c
> +++ b/fs/ceph/super.c
> @@ -1032,9 +1032,11 @@ void ceph_umount_begin(struct super_block *sb)
>  {
>  	struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
>  
> -	doutc(fsc->client, "starting forced umount\n");
>  	if (!fsc)
>  		return;
> +
> +	doutc(fsc->client, "starting forced umount\n");

I don't think we should be checking fsc against NULL.  I don't see a way
that sb->s_fs_info can be set to NULL, do you?




[Index of Archives]     [CEPH Users]     [Ceph Large]     [Ceph Dev]     [Information on CEPH]     [Linux BTRFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux