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| author | Akihiko Odaki <akihiko.odaki@daynix.com> | 2023-08-02 16:17:51 +0900 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-08-06 16:45:03 -0700 |
| commit | cb9d5d1fda0bc2312fc0c779b4ea1d7bf826f31f (patch) | |
| tree | 7e0a1e2916a4c5562461c562ffe45ad2c88af78e /linux-user/syscall.c | |
| parent | e69e032d1a8ee8d754ca119009a3c2c997f8bb30 (diff) | |
| download | focaccia-qemu-cb9d5d1fda0bc2312fc0c779b4ea1d7bf826f31f.tar.gz focaccia-qemu-cb9d5d1fda0bc2312fc0c779b4ea1d7bf826f31f.zip | |
linux-user: Do nothing if too small brk is specified
Linux 6.4.7 does nothing when a value smaller than the initial brk is
specified.
Fixes: 86f04735ac ("linux-user: Fix brk() to release pages")
Reviewed-by: Helge Deller <deller@gmx.de>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230802071754.14876-6-akihiko.odaki@daynix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index f64024273f..e1436a3962 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -820,14 +820,14 @@ abi_long do_brk(abi_ulong brk_val) /* brk pointers are always untagged */ - /* return old brk value if brk_val unchanged or zero */ - if (!brk_val || brk_val == target_brk) { + /* return old brk value if brk_val unchanged */ + if (brk_val == target_brk) { return target_brk; } /* do not allow to shrink below initial brk value */ if (brk_val < initial_target_brk) { - brk_val = initial_target_brk; + return target_brk; } new_brk = TARGET_PAGE_ALIGN(brk_val); |