arm64: traps: Don't print stack or raw PC/LR values in backtraces

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commit a25ffd3a63 upstream.

Printing raw pointer values in backtraces has potential security
implications and are of questionable value anyway.

This patch follows x86's lead and removes the "Exception stack:" dump
from kernel backtraces, as well as converting PC/LR values to symbols
such as "sysrq_handle_crash+0x20/0x30".

Tested-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
[bwh: Backported to 3.16:
 - Deleted code in dump_mem() and dump_backtrace_entry() is a bit different
 - Leave dump_backtrace() unchanged, since it doesn't use dump_mem()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Will Deacon 2017-10-19 13:19:20 +01:00 • committed by Ben Hutchings

parent ddaf61f3b8

commit 83f292cbc8

2 changed files with 4 additions and 50 deletions

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8

arch/arm64/kernel/process.c

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46

arch/arm64/kernel/traps.c

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