Re: Exim4 problems

[Svante Signell]

On Tue, 2011-05-17 at 10:27 +0200, Svante Signell wrote:

Further info. I think the problem is with gcc-4.6 mis-compiling.
(Another issue is the memora acces problems in gdb: bothe present with
gcc-4.4 and gcc-4.6).

Building exim-4.75-3 with gcc-4.6 -O2 results in a segfault:
(even though the packages are successfully built: debian/minimaltest
script is only present in 4.76-1)

gdb build-tree/build-exim4-daemon-{light,heavy}/exim

(gdb) run
Starting program: exim4-4.75/build-tree/build-exim4-daemon-light/exim 
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
[New Thread 7304.5]
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030
Cannot access memory at address 0x726f2030

Program received signal SIGSEGV, Segmentation fault.
0x0004d98a in rda_interpret (rdata=0xee6f5, options=865333,
include_directory=0x0, sieve_vacation_directory=0x1018d4 "",
sieve_enotify_mailto_owner=0x0, sieve_useraddress=0x1 <Address 0x1 out
of bounds>, sieve_subaddress=0x0, ugid=0x0, generated=0x0,
error=0xffffffff, eblockp=0x0, filtertype=0xffffffff, rname=0xfd344
"\001") at rda.c:554
554     BOOL had_disaster = FALSE;

(gdb) dir src
Source directories searched: /home/srs/DEBs/exim/exim4-4.75/src:$cdir:
$cwd

(gdb) list
545     int
546     rda_interpret(redirect_block *rdata, int options, uschar
*include_directory,
547       uschar *sieve_vacation_directory, uschar
*sieve_enotify_mailto_owner,
548       uschar *sieve_useraddress, uschar *sieve_subaddress,
ugid_block *ugid,
549       address_item **generated, uschar **error, error_block
**eblockp,
550       int *filtertype, uschar *rname)
551     {
552     int fd, rc, pfd[2];
553     int yield, status;
554     BOOL had_disaster = FALSE;
555     pid_t pid;
556     uschar *data;
557     uschar *readerror = US"";
558     void (*oldsignal)(int);

(gdb) thread apply all bt full
Thread 5 (Thread 7304.5):
#0  0x013fff4c in ?? ()
No symbol table info available.
#1  0x01400749 in ?? ()
No symbol table info available.
#2  0x01400e79 in ?? ()
No symbol table info available.
#3  0x01400f4b in ?? ()
No symbol table info available.
#4  0x0141194f in ?? ()
No symbol table info available.
#5  0x01594c3c in ?? ()
No symbol table info available.
#6  0x00000000 in ?? ()
No symbol table info available.

Thread 4 (Thread 7304.4):
#0  0x0004d98a in rda_interpret (rdata=0xee6f5, options=865333,
include_directory=0x0, sieve_vacation_directory=0x1018d4 "",
sieve_enotify_mailto_owner=0x0, sieve_useraddress=0x1 <Address 0x1 out
of bounds>, sieve_subaddress=0x0, ugid=0x0, generated=0x0,
error=0xffffffff, eblockp=0x0, filtertype=0xffffffff, rname=0xfd344
"\001") at rda.c:554
        i = <value optimized out>
        reply_options = <value optimized out>
        recipient = 0x0
        addr = <value optimized out>
        expandn = {0x0, 0x166f238 "+tls_peerdn", 0xfd820 "\317\206\r",
0x2a <Address 0x2a out of bounds>, 0xda0f4 "log", 0x0, 0x0, 0x0, 0x0,
0x1104041 "t/exim", 0x0 <repeats 12 times>}
        nextp = <value optimized out>
        fd = 23495736
        rc = <value optimized out>
        pfd = {0, 0}
        yield = -1
        status = <value optimized out>
        had_disaster = 0
        pid = <value optimized out>
        data = <value optimized out>
        readerror = 0xca6f5 "\340\006\001D$$\001D$8\301\346\004)\362
\211T$ \203|$ \a\017\216c\004"
        oldsignal = 0x307ac <expand_string_internal+12924>
#1  0xffffffff in ?? ()
No symbol table info available.