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| author |   pravin shelar <pshelar@ovn.org> | 2016-10-28 16:01:41 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-10-29 20:58:15 -0400 |
| commit | 0e82c7635997a11dbcfa98835c179084447ae2b0 (patch) | |
| tree | 8b91f0ecccf55a141b503b112c588a7e8a6a551c /net/netlink | |
| parent | net: phy: Add support for Microsemi VSC 8530/40 Fast Ethernet PHY (diff) | |
| download | linux-dev-0e82c7635997a11dbcfa98835c179084447ae2b0.tar.xz linux-dev-0e82c7635997a11dbcfa98835c179084447ae2b0.zip | |
genetlink: Fix generic netlink family unregister
This patch fixes a typo in unregister operation.
Following crash is fixed by this patch. It can be easily reproduced
by repeating modprobe and rmmod module that uses genetlink.
[ 261.446686] BUG: unable to handle kernel paging request at ffffffffa0264088
[ 261.448921] IP: [<ffffffff813cb70e>] strcmp+0xe/0x30
[ 261.450494] PGD 1c09067
[ 261.451266] PUD 1c0a063
[ 261.452091] PMD 8068d5067
[ 261.452525] PTE 0
[ 261.453164]
[ 261.453618] Oops: 0000 [#1] SMP
[ 261.454577] Modules linked in: openvswitch(+) ...
[ 261.480753] RIP: 0010:[<ffffffff813cb70e>] [<ffffffff813cb70e>] strcmp+0xe/0x30
[ 261.483069] RSP: 0018:ffffc90003c0bc28 EFLAGS: 00010282
[ 261.510145] Call Trace:
[ 261.510896] [<ffffffff816f10ca>] genl_family_find_byname+0x5a/0x70
[ 261.512819] [<ffffffff816f2319>] genl_register_family+0xb9/0x630
[ 261.514805] [<ffffffffa02840bc>] dp_init+0xbc/0x120 [openvswitch]
[ 261.518268] [<ffffffff8100217d>] do_one_initcall+0x3d/0x160
[ 261.525041] [<ffffffff811808a9>] do_init_module+0x60/0x1f1
[ 261.526754] [<ffffffff8110687f>] load_module+0x22af/0x2860
[ 261.530144] [<ffffffff81107026>] SYSC_finit_module+0x96/0xd0
[ 261.531901] [<ffffffff8110707e>] SyS_finit_module+0xe/0x10
[ 261.533605] [<ffffffff8100391e>] do_syscall_64+0x6e/0x180
[ 261.535284] [<ffffffff817c2faf>] entry_SYSCALL64_slow_path+0x25/0x25
[ 261.546512] RIP [<ffffffff813cb70e>] strcmp+0xe/0x30
[ 261.550198] ---[ end trace 76505a814dd68770 ]---
Fixes: 2ae0f17df1c ("genetlink: use idr to track families").
Reported-by: Jarno Rajahalme <jarno@ovn.org>
CC: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Pravin B Shelar <pshelar@ovn.org>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
| -rw-r--r-- | net/netlink/genetlink.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index df0cbcddda2c..caf04d70ba71 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -399,7 +399,7 @@ int genl_unregister_family(const struct genl_family *family) { genl_lock_all(); - if (genl_family_find_byid(family->id)) { + if (!genl_family_find_byid(family->id)) { genl_unlock_all(); return -ENOENT; } |