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| author | Eric Dumazet <edumazet@google.com> | 2016-09-21 03:06:17 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-22 08:41:17 +0200 |
| commit | adb03115f4590baa280ddc440a8eff08a6be0cb7 (patch) | |
| tree | 66b36cd6c485ea989a634ab49cc937dc5451ba3d /net/ipv4/udp_tunnel.c | |
| parent | net/mlx4_core: Fix to clean devlink resources (diff) | |
| download | linux-adb03115f4590baa280ddc440a8eff08a6be0cb7.tar.xz linux-adb03115f4590baa280ddc440a8eff08a6be0cb7.zip | |
net: get rid of an signed integer overflow in ip_idents_reserve()
Jiri Pirko reported an UBSAN warning happening in ip_idents_reserve()
[] UBSAN: Undefined behaviour in ./arch/x86/include/asm/atomic.h:156:11
[] signed integer overflow:
[] -2117905507 + -695755206 cannot be represented in type 'int'
Since we do not have uatomic_add_return() yet, use atomic_cmpxchg()
so that the arithmetics can be done using unsigned int.
Fixes: 04ca6973f7c1 ("ip: make IP identifiers less predictable")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp_tunnel.c')
0 files changed, 0 insertions, 0 deletions