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NFSD: Cap the number of bytes copied by nfs4_reset_recoverydir()

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BugLink: https://bugs.launchpad.net/bugs/2101915

[ Upstream commit f64ea4af43161bb86ffc77e6aeb5bcf5c3229df0 ]

It's only current caller already length-checks the string, but let's
be safe.

Fixes: 0964a3d3f1 ("[PATCH] knfsd: nfsd4 reboot dirname fix")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Chuck Lever
2025-03-11 08:51:19 +09:00
committed by Stefan Bader
parent 4f5343b54b
commit 05bf40d888
1 changed files with 2 additions and 1 deletions
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fs/nfsd/nfs4recover.c
+2 -1
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@@ -659,7 +659,8 @@ nfs4_reset_recoverydir(char *recdir)
return status;
status = -ENOTDIR;
if (d_is_dir(path.dentry)) {
strcpy(user_recovery_dirname, recdir);
strscpy(user_recovery_dirname, recdir,
sizeof(user_recovery_dirname));
status = 0;
}
path_put(&path);