iOS线上应用调用clogan_write写日志在zlib_util.c:78内clogan_zlib发生偶现crash

[JinHvung]

[yachaocn]

遇到类似问题：
堆栈：

1		talos_mbedtls_aes_crypt_cbc (in JD4iPhone) (talos_aes.c:923)
2		aes_encrypt_clogan (in JD4iPhone) (aes_util.c:33)
3		aes_encrypt_clogan (in JD4iPhone) (aes_util.c:33)
4		clogan_zlib (in JD4iPhone) (zlib_util.c:100)
5		clogan_write2 (in JD4iPhone) (clogan_core.c:621)
6		clogan_write (in JD4iPhone) (clogan_core.c:745)
7		__26-[Logan writeLog:logType:]_block_invoke (in xxxx) (Logan.m:188)

其他附加信息：
errorcode: KERN_MEMORY_ERROR at 0x1141bad40  
崩溃原因：Attempted to dereference garbage pointer 0x1141bad40.
特征：app切换到后台，一段时间后（约15s左右）