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| author | Benjamin Berg <[email protected]> | 2025-01-13 09:41:07 +0000 |
|---|---|---|
| committer | Richard Weinberger <[email protected]> | 2025-02-12 22:40:45 +0000 |
| commit | f82a9e7b9fa922bb9cccb00aae684a27b79e6df7 (patch) | |
| tree | 333f0d07cf0ee807ebd924ddedd87e7ab6b114a3 /net/unix/garbage.c | |
| parent | um: properly align signal stack on x86_64 (diff) | |
| download | kernel-f82a9e7b9fa922bb9cccb00aae684a27b79e6df7.tar.gz kernel-f82a9e7b9fa922bb9cccb00aae684a27b79e6df7.zip | |
um: fix execve stub execution on old host OSs
The stub execution uses the somewhat new close_range and execveat
syscalls. Of these two, the execveat call is essential, but the
close_range call is more about stub process hygiene rather than safety
(and its result is ignored).
Replace both calls with a raw syscall as older machines might not have a
recent enough kernel for close_range (with CLOSE_RANGE_CLOEXEC) or a
libc that does not yet expose both of the syscalls.
Fixes: 32e8eaf263d9 ("um: use execveat to create userspace MMs")
Reported-by: Glenn Washburn <[email protected]>
Closes: https://lore.kernel.org/20250108022404.05e0de1e@crass-HP-ZBook-15-G2
Signed-off-by: Benjamin Berg <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Richard Weinberger <[email protected]>
Diffstat (limited to 'net/unix/garbage.c')
0 files changed, 0 insertions, 0 deletions