On (13/09/13 19:17), Michal Židek wrote:
>On 09/13/2013 05:58 PM, Michal Židek wrote:
>>Hello,
>>
>>This patch should add another line of defence against memory cache
>>problems caused by accessing slot outside of bounds.
>>
>>Thanks
>>Michal
>>
>
>After discussion with Lukas I am attaching alternative version
>without the call to save the corrupted cache.
>
>Thanks
>Michal
>
I tested patch with latest sssd-1-9 on RHEL6.
Message was written to the sssd_nss.log:
(Sat Sep 14 00:19:24 2013) [sssd[nss]] [sss_mc_get_next_slot_with_hash]
(0x0010): Corrupted fastcache. Slot number too big.
But it seems that sssd_nss crashed.
Program received signal SIGILL, Illegal instruction.
0x00007fa63f8b5b03 in mabort () from /lib64/libc.so.6
#0 0x00007fa63f8b5b03 in mabort () from /lib64/libc.so.6
No symbol table info available.
#1 0x0000000000000008 in ?? ()
No symbol table info available.
#2 0x0000000001086cf0 in ?? ()
No symbol table info available.
#3 0x00000000010842a0 in ?? ()
No symbol table info available.
#4 0x00000000004288de in sss_mc_find_free_slots (_mcc=0x1086cf0, rec_len=252,
key=<value optimized out>, _rec=0x7fff1b6bb008) at
src/responder/nss/nsssrv_mmap_cache.c:495
tot_slots = <value optimized out>
i = <value optimized out>
rec = <value optimized out>
cur = 0
t = <value optimized out>
used = true
#5 sss_mc_get_record (_mcc=0x1086cf0, rec_len=252, key=<value optimized out>,
_rec=0x7fff1b6bb008) at src/responder/nss/nsssrv_mmap_cache.c:637
mcc = 0x7fa632dfa038
old_rec = <value optimized out>
rec = <value optimized out>
old_slots = <value optimized out>
num_slots = 8
base_slot = <value optimized out>
ret = 853516376
i = <value optimized out>
__FUNCTION__ = "sss_mc_get_record"
#6 0x0000000000428eee in sss_mmap_cache_pw_store (_mcc=0x10842a0,
name=0x7fff1b6bb140, pw=0x7fff1b6bb150, uid=126516, gid=16000,
gecos=0x7fff1b6bb180, homedir=0x7fff1b6bb170, shell=0x7fff1b6bb160) at
src/responder/nss/nsssrv_mmap_cache.c:731
mcc = 0x1086cf0
rec = <value optimized out>
data = <value optimized out>
uidkey = {str = 0x7fff1b6bb010 "126516", len = 7}
uidstr = "126516\000\000\021)\213"
data_len = 204
rec_len = 252
pos = <value optimized out>
ret = <value optimized out>
LS
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