http://llvm.org/bugs/show_bug.cgi?id=9046
Summary: memory unsafety bug
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Created an attachment (id=6044)
--> (http://llvm.org/bugs/attachment.cgi?id=6044)
failure-inducing C code
We've been seeing some odd compiler hangs and reports of heap corruption from
glibc; valgrind says it's a use-after-free problem. Sorry for the not-reduced
testcase.
regehr@home:~$ valgrind -q --trace-children=yes clang -O2 -w small.c
==30005== Invalid read of size 4
==30005== at 0x948B53E:
llvm::FoldingSetImpl::InsertNode(llvm::FoldingSetImpl::Node*, void*) (in
/mnt/z/z/compiler-install/llvm-gcc-r124171-install/bin/clang)
==30005== by 0x4B9DD63: ???
==30005== Address 0x465e064 is 124 bytes inside a block of size 260 free'd
==30005== at 0x40257ED: free (vg_replace_malloc.c:366)
==30005== by 0x948B4B3: llvm::FoldingSetImpl::GrowHashTable() (in
/mnt/z/z/compiler-install/llvm-gcc-r124171-install/bin/clang)
==30005==
==30005== Invalid write of size 4
==30005== at 0x948B54C:
llvm::FoldingSetImpl::InsertNode(llvm::FoldingSetImpl::Node*, void*) (in
/mnt/z/z/compiler-install/llvm-gcc-r124171-install/bin/clang)
==30005== by 0x4B9DD63: ???
==30005== Address 0x465e064 is 124 bytes inside a block of size 260 free'd
==30005== at 0x40257ED: free (vg_replace_malloc.c:366)
==30005== by 0x948B4B3: llvm::FoldingSetImpl::GrowHashTable() (in
/mnt/z/z/compiler-install/llvm-gcc-r124171-install/bin/clang)
==30005==
regehr@home:~$
regehr@home:~$
regehr@home:~$
regehr@home:~$ clang -v
clang version 2.9 (trunk 124171)
Target: i386-pc-linux-gnu
Thread model: posix
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