BackPup/Linux
1
0 Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-07 05:31:08 -04:00
Code Issues Packages Projects Releases Wiki Activity

signal/x86: In emulate_vsyscall force a signal instead of calling do_exit

Browse Source 
Directly calling do_exit with a signal number has the problem that
all of the side effects of the signal don't happen, such as
killing all of the threads of a process instead of just the
calling thread.

So replace do_exit(SIGSYS) with force_fatal_sig(SIGSYS) which
causes the signal handling to take it's normal path and work
as expected.

Cc: Andy Lutomirski <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Eric W. Biederman <[email protected]>
This commit is contained in:
Eric W. Biederman committed 2021-10-29 14:31:34 -05:00
1 parent 086ec444f8
commit 695dd0d634
1 file changed
+2 -1
Download Patch File Download Diff File Expand all files Collapse all files
arch/x86/entry/vsyscall/vsyscall_64.c
+2 -1
View File
@@ -226,7 +226,8 @@ bool emulate_vsyscall(unsigned long error_code,
if ((!tmp && regs->orig_ax != syscall_nr) || regs->ip != address) {
warn_bad_vsyscall(KERN_DEBUG, regs,
"seccomp tried to change syscall nr or ip");
do_exit(SIGSYS);
force_fatal_sig(SIGSYS);
return true;
}
regs->orig_ax = -1;
if (tmp)