zhenwei pi b4ba92094e iser: fix segfault at iser_reg_mr ...

Hit segfault at iser_reg_mr during attaching disk with backtrace:
 #0  0x000055ace9635b0f in iser_reg_mr (iser_conn=0x55aceca33820) at iser.c:1060
 #1  iser_connected_handler (cma_id=<optimized out>) at iser.c:1300
 #2  iser_cma_handler (event=0x7f29ef1f7950, cma_id=<optimized out>, iser_conn=0x55aceca33820) at iser.c:1326
 #3  cm_thread (arg=0x55aceca33820) at iser.c:1380
 #4  0x00007f2e2c31c4a4 in start_thread (arg=0x7f29ef1f8700) at pthread_create.c:456
 #5  0x00007f2e2c05ed0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
 (gdb) p *iser_conn->tx_desc
 Cannot access memory at address 0x20

This issue can be reproduced easily by attaching several disks of iser
protocol:
 # virsh attach-device stretch iser0.xml
 # virsh attach-device stretch iser1.xml
 ...

Initialize instances with zero to avoid random value pointer.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>

2020-02-27 10:03:46 +08:00

37 KiB

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