GNU bug report logs - #25364
etags malloc problems

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From: <5upnzm+87w9w470225qs <at> sharklasers.com>
To: 25364 <at> debbugs.gnu.org
Subject: bug#25364: etags malloc problems
Date: Thu, 05 Jan 2017 03:07:13 +0000

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clang-3.9  -g -pipe -Wall -O1 -fsanitize=address -fno-omit-frame-pointer   -MD  -MF.depend.etags.o -MTetags.o -std=gnu99 -fstack-protector-strong    -Qunused-arguments  -c etags.c -o etags.o
etags.c:6367:25: warning: assigning to 'unsigned char *' from 'char [256]'
      converts between pointers to integer types with different sign
      [-Wpointer-sign]
      patbuf->translate = lc_trans;     /* translation table to fold case  */
                        ^ ~~~~~~~~
1 warning generated.
clang-3.9 -g -pipe -Wall -O1 -fsanitize=address -fno-omit-frame-pointer -std=gnu99 -fstack-protector-strong -Qunused-arguments  -o etags etags.o  
echo ./etags.c | ./etags -l auto -S -

=================================================================
==5176==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 120 byte(s) in 1 object(s) allocated from:
    #0 0x4cba68 in __interceptor_malloc (/tmp/etags/etags+0x4cba68)
    #1 0x5043f8 in xmalloc /tmp/etags/etags.c:7238:18
    #2 0x5036c5 in main /tmp/etags/etags.c:1097:15
    #3 0x7fb31bc332b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x4cba68 in __interceptor_malloc (/tmp/etags/etags+0x4cba68)
    #1 0x5043f8 in xmalloc /tmp/etags/etags.c:7238:18
    #2 0x5036b8 in main /tmp/etags/etags.c:1091:20
    #3 0x7fb31bc332b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

Direct leak of 24 byte(s) in 1 object(s) allocated from:
    #0 0x4cba68 in __interceptor_malloc (/tmp/etags/etags+0x4cba68)
    #1 0x5043f8 in xmalloc /tmp/etags/etags.c:7238:18
    #2 0x50447c in concat /tmp/etags/etags.c:6958:18
    #3 0x503706 in main /tmp/etags/etags.c:1109:15
    #4 0x7fb31bc332b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

SUMMARY: AddressSanitizer: 184 byte(s) leaked in 3 allocation(s).

the attached patch is what i used to make etags.c compile.





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[etagswithoutemacs.diff (text/x-patch, attachment)]

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