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| author | Michael Karcher <Michael.Karcher@fu-berlin.de> | 2024-07-28 15:30:57 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2024-11-08 15:55:04 +0100 |
| commit | 234458024300f0b4b430785999f33eddf059af6a (patch) | |
| tree | 0094e6bb4cb11251b787dfaa3e01e3d25f5b3a32 /dlfcn/dlfcn.h | |
| parent | 3a34851103d554b2c9b269ecae111648f9d7bb6d (diff) | |
| download | glibc-234458024300f0b4b430785999f33eddf059af6a.tar.gz glibc-234458024300f0b4b430785999f33eddf059af6a.tar.xz glibc-234458024300f0b4b430785999f33eddf059af6a.zip | |
Mitigation for "clone on sparc might fail with -EFAULT for no valid reason" (bz 31394)
It seems the kernel can not deal with uncommitted stack space in the area intended for the register window when executing the clone() system call. So create a nested frame (proxy for the kernel frame) and flush it from the processor to memory to force committing pages to the stack before invoking the system call. Bug: https://www.mail-archive.com/debian-glibc@lists.debian.org/msg62592.html Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31394 See-also: https://lore.kernel.org/sparclinux/62f9be9d-a086-4134-9a9f-5df8822708af@mkarcher.dialup.fu-berlin.de/ Signed-off-by: Michael Karcher <sourceware-bugzilla@mkarcher.dialup.fu-berlin.de> Reviewed-by: DJ Delorie <dj@redhat.com> (cherry picked from commit faeaa3bc9f76030b9882ccfdee232fc0ca6dcb06)
Diffstat (limited to 'dlfcn/dlfcn.h')
0 files changed, 0 insertions, 0 deletions