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| author | Andrey Mirkin <amirkin@openvz.org> | 2006-12-06 20:31:35 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:20 -0800 |
| commit | 822191a2fa1584a29c3224ab328507adcaeac1ab (patch) | |
| tree | 833b6e7d88fc49bf430826db26f75b4877593a15 /include/asm-um/user.h | |
| parent | a1e85378ba50694cf8f27b190c7e16d7c8dad276 (diff) | |
| download | blackbird-op-linux-822191a2fa1584a29c3224ab328507adcaeac1ab.tar.gz blackbird-op-linux-822191a2fa1584a29c3224ab328507adcaeac1ab.zip | |
[PATCH] skip data conversion in compat_sys_mount when data_page is NULL
OpenVZ Linux kernel team has found a problem with mounting in compat mode.
Simple command "mount -t smbfs ..." on Fedora Core 5 distro in 32-bit mode
leads to oops:
Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: compat_sys_mount+0xd6/0x290
Process mount (pid: 14656, veid=300, threadinfo ffff810034d30000, task ffff810034c86bc0)
Call Trace: ia32_sysret+0x0/0xa
The problem is that data_page pointer can be NULL, so we should skip data
conversion in this case.
Signed-off-by: Andrey Mirkin <amirkin@openvz.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-um/user.h')
0 files changed, 0 insertions, 0 deletions
