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aha/net/ax25
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Alexey Dobriyan 9ac0be9d4f [AX25]: don't free pointers to statically allocated data 
commit 8d5cf596d1 started to add statically
allocated ax25_protocol's to list. However kfree() was still in place waiting
for unsuspecting ones on module removal.

Steps to reproduce:

	modprobe netrom
	rmmod netrom

P.S.: code would benefit greatly from list_add/list_del usage

kernel BUG at mm/slab.c:592!
invalid opcode: 0000 [1] PREEMPT SMP 
CPU 0 
Modules linked in: netrom ax25 af_packet usbcore rtc_cmos rtc_core rtc_lib
Pid: 4477, comm: rmmod Not tainted 2.6.23-rc3-bloat #2
RIP: 0010:[<ffffffff802ac646>]  [<ffffffff802ac646>] kfree+0x1c6/0x260
RSP: 0000:ffff810079a05e48  EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff81000000c000
RDX: ffff81007e552458 RSI: 0000000000000000 RDI: 000000000000805d
RBP: ffff810079a05e88 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8805d080
R13: ffffffff8805d080 R14: 0000000000000000 R15: 0000000000000282
FS:  00002b73fc98aae0(0000) GS:ffffffff805dc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 000000000053f3b8 CR3: 0000000079ff2000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process rmmod (pid: 4477, threadinfo ffff810079a04000, task ffff8100775aa480)
Stack:  ffff810079a05e68 0000000000000246 ffffffff8804eca0 0000000000000000
 ffffffff8805d080 00000000000000cf 0000000000000000 0000000000000880
 ffff810079a05eb8 ffffffff8803ec90 ffff810079a05eb8 0000000000000000
Call Trace:
 [<ffffffff8803ec90>] :ax25:ax25_protocol_release+0xa0/0xb0
 [<ffffffff88056ecb>] :netrom:nr_exit+0x6b/0xf0
 [<ffffffff80268bf0>] sys_delete_module+0x170/0x1f0
 [<ffffffff8025da35>] trace_hardirqs_on+0xd5/0x170
 [<ffffffff804835aa>] trace_hardirqs_on_thunk+0x35/0x37
 [<ffffffff8020c13e>] system_call+0x7e/0x83


Code: 0f 0b eb fe 66 66 90 66 66 90 48 8b 52 10 48 8b 02 25 00 40 
RIP  [<ffffffff802ac646>] kfree+0x1c6/0x260
 RSP <ffff810079a05e48>
Kernel panic - not syncing: Fatal exception

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-14 17:24:05 -07:00
..
af_ax25.c [NET] AX25: Fix whitespace errors. 2007-07-19 10:43:13 +09:00
ax25_addr.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ax25_dev.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ax25_ds_in.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ax25_ds_subr.c [SK_BUFF]: Introduce skb_reset_network_header(skb) 2007-04-25 22:24:46 -07:00
ax25_ds_timer.c [AX.25]: Optimize AX.25 socket list lock 2006-07-12 13:58:57 -07:00
ax25_iface.c [AX25]: don't free pointers to statically allocated data 2007-08-14 17:24:05 -07:00
ax25_in.c [SK_BUFF]: Some more conversions to skb_copy_from_linear_data 2007-04-25 22:28:30 -07:00
ax25_ip.c [NET]: cleanup extra semicolons 2007-04-25 22:29:24 -07:00
ax25_out.c [SK_BUFF]: Introduce skb_copy_from_linear_data{_offset} 2007-04-25 22:28:23 -07:00
ax25_route.c [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
ax25_std_in.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ax25_std_subr.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ax25_std_timer.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ax25_subr.c [SK_BUFF]: Introduce skb_reset_network_header(skb) 2007-04-25 22:24:46 -07:00
ax25_timer.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ax25_uid.c [NET]: Make all initialized struct seq_operations const. 2007-07-10 23:07:31 -07:00
Kconfig [S390] Kconfig: unwanted menus for s390. 2007-05-10 15:46:07 +02:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sysctl_net_ax25.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
TODO Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00