leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bnx2x: fix possible panic under memory stress

Browse Source 
While it is legal to kfree(NULL), it is not wise to use :
put_page(virt_to_head_page(NULL))

 BUG: unable to handle kernel paging request at ffffeba400000000
 IP: [<ffffffffc01f5928>] virt_to_head_page+0x36/0x44 [bnx2x]

Reported-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ariel Elior <ariel.elior@qlogic.com>
Fixes: d46d132cc0 ("bnx2x: use netdev_alloc_frag()")
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2014-06-26 00:44:02 -07:00 committed by David S. Miller
parent 7f50236153
commit 07b0f00964
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
View File

@ -797,6 +797,7 @@ static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
return; return;
} }
if (new_data)
bnx2x_frag_free(fp, new_data); bnx2x_frag_free(fp, new_data);
drop: drop:
/* drop the packet and keep the buffer in the bin */ /* drop the packet and keep the buffer in the bin */