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| author | Kees Cook <keescook@chromium.org> | 2017-12-19 13:52:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-12-19 17:04:43 -0800 |
| commit | 10a7e9d849150a2879efc0b04d8a51068c9dd0c5 (patch) | |
| tree | fa44e287635811bbc18ee4c722c3c32c9cf78ce5 /arch/x86/mm | |
| parent | ace52288edf0cb5e7a52b681f057f86224c49c27 (diff) | |
| download | linux-10a7e9d849150a2879efc0b04d8a51068c9dd0c5.tar.bz2 | |
Do not hash userspace addresses in fault handlers
The hashing of %p was designed to restrict kernel addresses. There is
no reason to hash the userspace values seen during a segfault report,
so switch these to %px. (Some architectures already use %lx.)
Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/fault.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index febf6980e653..06fe3d51d385 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -860,7 +860,7 @@ show_signal_msg(struct pt_regs *regs, unsigned long error_code, if (!printk_ratelimit()) return; - printk("%s%s[%d]: segfault at %lx ip %p sp %p error %lx", + printk("%s%s[%d]: segfault at %lx ip %px sp %px error %lx", task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG, tsk->comm, task_pid_nr(tsk), address, (void *)regs->ip, (void *)regs->sp, error_code); |