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| author | Jann Horn <[email protected]> | 2018-08-31 19:41:51 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-09-06 12:33:12 +0000 |
| commit | 9fe6299dde587788f245e9f7a5a1b296fad4e8c7 (patch) | |
| tree | 45fd4582b522ebfe51c990470f409ba66ba22f17 /tools/lib/bpf/str_error.c | |
| parent | x86/tsc: Prevent result truncation on 32bit (diff) | |
| download | kernel-9fe6299dde587788f245e9f7a5a1b296fad4e8c7.tar.gz kernel-9fe6299dde587788f245e9f7a5a1b296fad4e8c7.zip | |
x86/process: Don't mix user/kernel regs in 64bit __show_regs()
When the kernel.print-fatal-signals sysctl has been enabled, a simple
userspace crash will cause the kernel to write a crash dump that contains,
among other things, the kernel gsbase into dmesg.
As suggested by Andy, limit output to pt_regs, FS_BASE and KERNEL_GS_BASE
in this case.
This also moves the bitness-specific logic from show_regs() into
process_{32,64}.c.
Fixes: 45807a1df9f5 ("vdso: print fatal signals")
Signed-off-by: Jann Horn <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/lib/bpf/str_error.c')
0 files changed, 0 insertions, 0 deletions