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| author | Mark Salyzyn <salyzyn@android.com> | 2015-01-13 14:32:50 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2015-01-16 15:47:23 -0800 |
| commit | f44f96528a8cd4134a4f2c1a9d8c785600aa4888 (patch) | |
| tree | b769fe914e0eab63f216244ec31ce9a95f974e07 /fs | |
| parent | ff6bf6e8024f073ecea7dbf5c6afe6bd3872a569 (diff) | |
| download | linux-f44f96528a8cd4134a4f2c1a9d8c785600aa4888.tar.gz linux-f44f96528a8cd4134a4f2c1a9d8c785600aa4888.tar.bz2 linux-f44f96528a8cd4134a4f2c1a9d8c785600aa4888.zip | |
pstore: Handle zero-sized prz in series
ramoops_pstore_read fails to return the next in a prz
series after first zero-sized entry, not venturing to
the next non-zero entry.
Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/pstore/ram.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 34ed8f860e23..6150e54eed30 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -164,6 +164,12 @@ static int ramoops_read_kmsg_hdr(char *buffer, struct timespec *time, return header_length; } +static bool prz_ok(struct persistent_ram_zone *prz) +{ + return !!prz && !!(persistent_ram_old_size(prz) + + persistent_ram_ecc_string(prz, NULL, 0)); +} + static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, int *count, struct timespec *time, char **buf, bool *compressed, @@ -178,13 +184,13 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, prz = ramoops_get_next_prz(cxt->przs, &cxt->dump_read_cnt, cxt->max_dump_cnt, id, type, PSTORE_TYPE_DMESG, 1); - if (!prz) + if (!prz_ok(prz)) prz = ramoops_get_next_prz(&cxt->cprz, &cxt->console_read_cnt, 1, id, type, PSTORE_TYPE_CONSOLE, 0); - if (!prz) + if (!prz_ok(prz)) prz = ramoops_get_next_prz(&cxt->fprz, &cxt->ftrace_read_cnt, 1, id, type, PSTORE_TYPE_FTRACE, 0); - if (!prz) + if (!prz_ok(prz)) return 0; if (!persistent_ram_old(prz)) |