Steven Rostedt 4448008eb1 isdn: icn: Fix stack corruption bug. ... Running randconfig with ktest.pl I hit this bug: [ 16.101158] ICN-ISDN-driver Rev 1.65.6.8 mem=0x000d0000 [ 16.106376] icn: (line0) ICN-2B, port 0x320 added [ 16.111064] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: c1642880 [ 16.111066] [ 16.121214] Pid: 1, comm: swapper Not tainted 2.6.37-rc2-test-00124-g6656b3f #8 [ 16.128499] Call Trace: [ 16.130942] [<c0f51662>] ? printk+0x1d/0x23 [ 16.135200] [<c0f5153f>] panic+0x5c/0x162 [ 16.139286] [<c0d62a9a>] ? icn_addcard+0x6d/0xbe [ 16.143975] [<c0445783>] print_tainted+0x0/0x8c [ 16.148582] [<c1642880>] ? icn_init+0xd8/0xdf [ 16.153012] [<c1642880>] icn_init+0xd8/0xdf [ 16.157271] [<c04012e5>] do_one_initcall+0x8c/0x143 [ 16.162222] [<c16427a8>] ? icn_init+0x0/0xdf [ 16.166566] [<c15f1a05>] kernel_init+0x13f/0x1da [ 16.171256] [<c15f18c6>] ? kernel_init+0x0/0x1da [ 16.175945] [<c0403bfe>] kernel_thread_helper+0x6/0x10 [ 16.181181] panic occurred, switching back to text console Looking into it I found that the stack was corrupted by the assignment of the Rev #. The variable rev is given 10 bytes, and in this output the characters that were copied was: " 1.65.6.8 $". Which was 11 characters plus the null ending character for a total of 12 bytes, thus corrupting the stack. This patch ups the variable size to 20 bytes as well as changes the strcpy to strncpy. I also added a check to make sure '$' is found. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2010-11-24 11:19:05 -08:00
..
icn.c
icn.h
Kconfig
Makefile