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| author | Thomas Tai <thomas.tai@oracle.com> | 2021-04-08 20:28:33 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-04-09 14:45:09 +0300 |
| commit | 632a1c209b8773cb0119fe3aada9f1db14fa357c (patch) | |
| tree | b4581824c67a657e741df1fb5d69378db1249017 /arch | |
| parent | 3a62583c2853b0ab37a57dde79decea210b5fb89 (diff) | |
| download | linux-632a1c209b8773cb0119fe3aada9f1db14fa357c.tar.xz | |
x86/traps: Correct exc_general_protection() and math_error() return paths
Commit
334872a09198 ("x86/traps: Attempt to fixup exceptions in vDSO before signaling")
added return statements which bypass calling cond_local_irq_disable().
According to
ca4c6a9858c2 ("x86/traps: Make interrupt enable/disable symmetric in C code"),
cond_local_irq_disable() is needed because the asm return code no longer
disables interrupts. Follow the existing code as an example to use "goto
exit" instead of "return" statement.
[ bp: Massage commit message. ]
Fixes: 334872a09198 ("x86/traps: Attempt to fixup exceptions in vDSO before signaling")
Signed-off-by: Thomas Tai <thomas.tai@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Link: https://lkml.kernel.org/r/1617902914-83245-1-git-send-email-thomas.tai@oracle.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/traps.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index ac1874a2a70e..651e3e508959 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -556,7 +556,7 @@ DEFINE_IDTENTRY_ERRORCODE(exc_general_protection) tsk->thread.trap_nr = X86_TRAP_GP; if (fixup_vdso_exception(regs, X86_TRAP_GP, error_code, 0)) - return; + goto exit; show_signal(tsk, SIGSEGV, "", desc, regs, error_code); force_sig(SIGSEGV); @@ -1057,7 +1057,7 @@ static void math_error(struct pt_regs *regs, int trapnr) goto exit; if (fixup_vdso_exception(regs, trapnr, 0, 0)) - return; + goto exit; force_sig_fault(SIGFPE, si_code, (void __user *)uprobe_get_trap_addr(regs)); |