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Dan Carpenter discovered a buffer overflow in the Coda file system readlink code. A userspace file system daemon can return a 4096 byte result which then triggers a one byte write past the allocated readlink result buffer. This does not trigger with an unmodified Coda implementation because Coda has a 1024 byte limit for symbolic links, however other userspace file systems using the Coda kernel module could be affected. Although this is an obvious overflow, I don't think this has to be handled as too sensitive from a security perspective because the overflow is on the Coda userspace daemon side which already needs root to open Coda's kernel device and to mount the file system before we get to the point that links can be read. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| cache.c | ||
| cnode.c | ||
| coda_cache.h | ||
| coda_fs_i.h | ||
| coda_int.h | ||
| coda_linux.c | ||
| coda_linux.h | ||
| dir.c | ||
| file.c | ||
| inode.c | ||
| Kconfig | ||
| Makefile | ||
| pioctl.c | ||
| psdev.c | ||
| symlink.c | ||
| sysctl.c | ||
| upcall.c | ||