https://bugs.kde.org/show_bug.cgi?id=369383
Bug ID: 369383
Summary: x86 sys_modify_ldt wrapper crashes on bad ptr
Product: valgrind
Version: 3.12 SVN
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
LTP testcases/kernel/syscalls/modify_ldt/modify_ldt01:
==30317== Syscall param modify_ldt(ptr) points to unaddressable byte(s)
==30317== at 0x412FFF9: modify_ldt (in /usr/lib/libc-2.23.so)
==30317== by 0x8049BCD: main (modify_ldt01.c:188)
==30317== Address 0x805efff is 4095 bytes after the brk data segment limit
0x805e000
==30317==
--30317-- VALGRIND INTERNAL ERROR: Valgrind received a signal 11 (SIGSEGV) -
exiting
--30317-- si_code=1; Faulting address: 0x805F000; sp: 0x62a5ce34
valgrind: the 'impossible' happened:
Killed by fatal signal
host stacktrace:
==30317== at 0x380B70B7: read_ldt (syswrap-x86-linux.c:541)
==30317== by 0x380B70B7: sys_modify_ldt (syswrap-x86-linux.c:603)
==30317== by 0x380B70B7: vgSysWrap_x86_linux_sys_modify_ldt_before
(syswrap-x86-linux.c:1037)
Reproducible: Always
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