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authorSergei Trofimovich <slyfox@gentoo.org>2021-04-29 22:53:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-30 11:20:35 -0700
commit99e729bd40fb3272fa4b0140839d5e957b58588a (patch)
tree95ce93c001ab5b06fbdd378eb79ec0a81fe392dc /scripts
parent9187592b96385e5060dfb2b182aa9ec93d5c0332 (diff)
ia64: module: fix symbolizer crash on fdescr
Noticed failure as a crash on ia64 when tried to symbolize all backtraces collected by page_owner=on: $ cat /sys/kernel/debug/page_owner <oops> CPU: 1 PID: 2074 Comm: cat Not tainted 5.12.0-rc4 #226 Hardware name: hp server rx3600, BIOS 04.03 04/08/2008 ip is at dereference_module_function_descriptor+0x41/0x100 Crash happens at dereference_module_function_descriptor() due to use-after-free when dereferencing ".opd" section header. All section headers are already freed after module is laoded successfully. To keep symbolizer working the change stores ".opd" address and size after module is relocated to a new place and before section headers are discarded. To make similar errors less obscure module_finalize() now zeroes out all variables relevant to module loading only. Link: https://lkml.kernel.org/r/20210403074803.3309096-1-slyfox@gentoo.org Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions