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| author | Otavio Salvador <otavio@ossystems.com.br> | 2022-05-19 11:02:10 -0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-05-19 11:02:10 -0300 |
| commit | b7007e1d615b8d4b71c28ebf790c5164fc4491d5 (patch) | |
| tree | 48c35f63dc1101d0d528b5d79c81849b99ca7c6d /fs/proc/vmcore.c | |
| parent | 38955ef654554c94f4d91bafb9ef5c5f41a4c0f6 (diff) | |
| parent | 0e61b511dd8474280ba674590daa55f30433b7d4 (diff) | |
Merge pull request #565 from philschenker/update-to-5.4.193__update-to-2.3.7__5.4-2.3.x-imx
Update Patchlevel on Branch 5.4-2.3.x-imx from 5.4.161->5.4.193
Diffstat (limited to 'fs/proc/vmcore.c')
| -rw-r--r-- | fs/proc/vmcore.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 080ca9d5eccb..b1102a31a108 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -125,9 +125,13 @@ ssize_t read_from_oldmem(char *buf, size_t count, nr_bytes = count; /* If pfn is not ram, return zeros for sparse dump files */ - if (pfn_is_ram(pfn) == 0) - memset(buf, 0, nr_bytes); - else { + if (pfn_is_ram(pfn) == 0) { + tmp = 0; + if (!userbuf) + memset(buf, 0, nr_bytes); + else if (clear_user(buf, nr_bytes)) + tmp = -EFAULT; + } else { if (encrypted) tmp = copy_oldmem_page_encrypted(pfn, buf, nr_bytes, @@ -136,10 +140,10 @@ ssize_t read_from_oldmem(char *buf, size_t count, else tmp = copy_oldmem_page(pfn, buf, nr_bytes, offset, userbuf); - - if (tmp < 0) - return tmp; } + if (tmp < 0) + return tmp; + *ppos += nr_bytes; count -= nr_bytes; buf += nr_bytes; |