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author | Eric W. Biederman <ebiederm@xmission.com> | 2018-07-19 20:48:30 -0500 |
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committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-09-11 21:18:53 +0200 |
commit | 4a63c1ffd384ebdce40aac9c997dab68379137be (patch) | |
tree | ca6699a58409ed188cc82860fd9144c155e6cc9f /scripts | |
parent | 55a3235fc71bf34303e34a95eeee235b2d2a35dd (diff) | |
download | linux-stable-4a63c1ffd384ebdce40aac9c997dab68379137be.tar.gz linux-stable-4a63c1ffd384ebdce40aac9c997dab68379137be.tar.bz2 linux-stable-4a63c1ffd384ebdce40aac9c997dab68379137be.zip |
signal: Properly deliver SIGSEGV from x86 uprobes
For userspace to tell the difference between an random signal
and an exception, the exception must include siginfo information.
Using SEND_SIG_FORCED for SIGSEGV is thus wrong, and it will result in
userspace seeing si_code == SI_USER (like a random signal) instead of
si_code == SI_KERNEL or a more specific si_code as all exceptions
deliver.
Therefore replace force_sig_info(SIGSEGV, SEND_SIG_FORCE, current)
with force_sig(SIG_SEGV, current) which gets this right and is shorter
and easier to type.
Fixes: 791eca10107f ("uretprobes/x86: Hijack return address")
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions