diff options
| author | Anton Ivanov <anton.ivanov@cambridgegreys.com> | 2020-11-13 10:26:17 +0000 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2020-12-13 22:21:07 +0100 |
| commit | 97be7ceaf7fea68104824b6aa874cff235333ac1 (patch) | |
| tree | 22a205f612d243e49b4495d31fac18acc604053d /arch/um | |
| parent | 09041c92f0aacbb6f5a252351d6e0a9e0ee9bcc5 (diff) | |
um: Remove use of asprinf in umid.c
asprintf is not compatible with the existing uml memory allocation
mechanism. Its use on the "user" side of UML results in a corrupt slab
state.
Fixes: 0d4e5ac7e780 ("um: remove uses of variable length arrays")
Cc: stable@vger.kernel.org
Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/os-Linux/umid.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c index 1d7558dac75f..a3dd61521d24 100644 --- a/arch/um/os-Linux/umid.c +++ b/arch/um/os-Linux/umid.c @@ -137,20 +137,13 @@ static inline int is_umdir_used(char *dir) { char pid[sizeof("nnnnnnnnn")], *end, *file; int dead, fd, p, n, err; - size_t filelen; + size_t filelen = strlen(dir) + sizeof("/pid") + 1; - err = asprintf(&file, "%s/pid", dir); - if (err < 0) - return 0; - - filelen = strlen(file); + file = malloc(filelen); + if (!file) + return -ENOMEM; - n = snprintf(file, filelen, "%s/pid", dir); - if (n >= filelen) { - printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n"); - err = -E2BIG; - goto out; - } + snprintf(file, filelen, "%s/pid", dir); dead = 0; fd = open(file, O_RDONLY); |