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Eric Dumazet 2105d3d1ec net: fix rtnh_ok() 
commit b1993a2de12c9e75c35729e2ffbc3a92d50c0d31 upstream.

syzbot reported :

BUG: KMSAN: uninit-value in rtnh_ok include/net/nexthop.h:11 [inline]
BUG: KMSAN: uninit-value in fib_count_nexthops net/ipv4/fib_semantics.c:469 [inline]
BUG: KMSAN: uninit-value in fib_create_info+0x554/0x8d20 net/ipv4/fib_semantics.c:1091

@remaining is an integer, coming from user space.
If it is negative we want rtnh_ok() to return false.

Fixes: 4e902c5741 ("[IPv4]: FIB configuration using struct fib_config")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2019-07-27 21:49:08 +02:00
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acpi
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asm-generic scsi: dma-mapping: always provide dma_get_cache_alignment 2019-07-27 21:46:11 +02:00
clocksource
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crypto crypto: hmac - require that the underlying hash algorithm is unkeyed 2019-07-27 21:45:46 +02:00
drm Merge remote-tracking branch 'f2fs/linux-3.10.y' into HEAD 2017-04-18 17:02:28 +02:00
dt-bindings
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keys
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kvm
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linux UPSTREAM: lz4: fix wrong compress buffer size for 64-bits 2019-07-27 21:47:56 +02:00
math-emu
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media Merge tag 'LA.BR.1.3.6-03510-8976.0' into HEAD 2017-04-18 12:11:50 +02:00
memory
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misc
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net net: fix rtnh_ok() 2019-07-27 21:49:08 +02:00
pcmcia
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ras
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rdma RDMA/core: Fix incorrect structure packing for booleans 2019-07-27 21:43:09 +02:00
rxrpc
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scsi scsi: libsas: align sata_device's rps_resp on a cacheline 2019-07-27 21:46:11 +02:00
sdp
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soc/qcom Merge tag 'LA.BR.1.3.6-03910-8976.0' of https://source.codeaurora.org/quic/la/kernel/msm-3.10 into HEAD 2017-05-26 13:28:48 +02:00
sound ALSA: seq: Avoid invalid lockdep class warning 2019-07-27 21:45:44 +02:00
target target: Avoid mappedlun symlink creation during lun shutdown 2019-07-27 21:44:16 +02:00
trace tracing: Add #undef to fix compile error 2019-07-27 21:43:11 +02:00
uapi USB: core: Add type-specific length check of BOS descriptors 2019-07-27 21:46:13 +02:00
video
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xen Merge remote-tracking branch 'f2fs/linux-3.10.y' into HEAD 2017-04-18 17:02:28 +02:00
Kbuild
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