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| author | Laurent Vivier <laurent@vivier.eu> | 2022-10-05 18:38:26 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2022-10-21 17:46:19 +0200 |
| commit | 46187d707e7639b743a3b9f72da03ad4b9abc255 (patch) | |
| tree | 74b00e7aaf803b16b80729a6c2e8d8b87bffceed /linux-user/syscall.c | |
| parent | eeed22916b8292b12d21e46ba9d3a383d669d9ff (diff) | |
| download | qemu-46187d707e7639b743a3b9f72da03ad4b9abc255.zip qemu-46187d707e7639b743a3b9f72da03ad4b9abc255.tar.gz qemu-46187d707e7639b743a3b9f72da03ad4b9abc255.tar.bz2 | |
linux-user: fix pidfd_send_signal()
According to pidfd_send_signal(2), info argument can be a NULL pointer.
Fix strace to correctly manage ending comma in parameters.
Fixes: cc054c6f13 ("linux-user: Add pidfd_open(), pidfd_send_signal() and pidfd_getfd() syscalls")
cc: Helge Deller <deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Helge Deller <deller@gmx.de>
Message-Id: <20221005163826.1455313-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 8b2d39f..ad06ec7 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8679,16 +8679,21 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1, #if defined(__NR_pidfd_send_signal) && defined(TARGET_NR_pidfd_send_signal) case TARGET_NR_pidfd_send_signal: { - siginfo_t uinfo; + siginfo_t uinfo, *puinfo; - p = lock_user(VERIFY_READ, arg3, sizeof(target_siginfo_t), 1); - if (!p) { - return -TARGET_EFAULT; + if (arg3) { + p = lock_user(VERIFY_READ, arg3, sizeof(target_siginfo_t), 1); + if (!p) { + return -TARGET_EFAULT; + } + target_to_host_siginfo(&uinfo, p); + unlock_user(p, arg3, 0); + puinfo = &uinfo; + } else { + puinfo = NULL; } - target_to_host_siginfo(&uinfo, p); - unlock_user(p, arg3, 0); ret = get_errno(pidfd_send_signal(arg1, target_to_host_signal(arg2), - &uinfo, arg4)); + puinfo, arg4)); } return ret; #endif |