)]}'
{
  "commit": "f022a2307eda48aa114dc976cafced1703d8b427",
  "tree": "a65755abbb244dd70f0b56586a4e76b0b74bc303",
  "parents": [
    "f59ce51e1a7a4f9848ff2b51b7ddd34ab1433d67"
  ],
  "author": {
    "name": "Eric Dumazet",
    "email": "edumazet@google.com",
    "time": "Tue May 07 16:31:45 2024 +0000"
  },
  "committer": {
    "name": "Shuo Yang",
    "email": "gshuoy@google.com",
    "time": "Fri Jun 14 16:22:34 2024 +0000"
  },
  "message": "ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()\n\n[ Upstream commit d101291b2681e5ab938554e3e323f7a7ee33e3aa ]\n\nsyzbot is able to trigger the following crash [1],\ncaused by unsafe ip6_dst_idev() use.\n\nIndeed ip6_dst_idev() can return NULL, and must always be checked.\n\n[1]\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 PID: 31648 Comm: syz-executor.0 Not tainted 6.9.0-rc4-next-20240417-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\n RIP: 0010:__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]\n RIP: 0010:fib6_rule_action+0x241/0x7b0 net/ipv6/fib6_rules.c:267\nCode: 02 00 00 49 8d 9f d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f9 32 bf f7 48 8b 1b 48 89 d8 48 c1 e8 03 \u003c42\u003e 80 3c 20 00 74 08 48 89 df e8 e0 32 bf f7 4c 8b 03 48 89 ef 4c\nRSP: 0018:ffffc9000fc1f2f0 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1a772f98c8186700\nRDX: 0000000000000003 RSI: ffffffff8bcac4e0 RDI: ffffffff8c1f9760\nRBP: ffff8880673fb980 R08: ffffffff8fac15ef R09: 1ffffffff1f582bd\nR10: dffffc0000000000 R11: fffffbfff1f582be R12: dffffc0000000000\nR13: 0000000000000080 R14: ffff888076509000 R15: ffff88807a029a00\nFS:  00007f55e82ca6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b31d23000 CR3: 0000000022b66000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n  fib_rules_lookup+0x62c/0xdb0 net/core/fib_rules.c:317\n  fib6_rule_lookup+0x1fd/0x790 net/ipv6/fib6_rules.c:108\n  ip6_route_output_flags_noref net/ipv6/route.c:2637 [inline]\n  ip6_route_output_flags+0x38e/0x610 net/ipv6/route.c:2649\n  ip6_route_output include/net/ip6_route.h:93 [inline]\n  ip6_dst_lookup_tail+0x189/0x11a0 net/ipv6/ip6_output.c:1120\n  ip6_dst_lookup_flow+0xb9/0x180 net/ipv6/ip6_output.c:1250\n  sctp_v6_get_dst+0x792/0x1e20 net/sctp/ipv6.c:326\n  sctp_transport_route+0x12c/0x2e0 net/sctp/transport.c:455\n  sctp_assoc_add_peer+0x614/0x15c0 net/sctp/associola.c:662\n  sctp_connect_new_asoc+0x31d/0x6c0 net/sctp/socket.c:1099\n  __sctp_connect+0x66d/0xe30 net/sctp/socket.c:1197\n  sctp_connect net/sctp/socket.c:4819 [inline]\n  sctp_inet_connect+0x149/0x1f0 net/sctp/socket.c:4834\n  __sys_connect_file net/socket.c:2048 [inline]\n  __sys_connect+0x2df/0x310 net/socket.c:2065\n  __do_sys_connect net/socket.c:2075 [inline]\n  __se_sys_connect net/socket.c:2072 [inline]\n  __x64_sys_connect+0x7a/0x90 net/socket.c:2072\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nBUG\u003db/346513784\nTEST\u003dpresubmit\nRELEASE_NOTE\u003dFixes CVE-2024-36902 in the Linux kernel\n\ncos-patch: security-moderate\nFixes: 5e5f3f0f8013 (\"[IPV6] ADDRCONF: Convert ipv6_get_saddr() to ipv6_dev_get_saddr().\")\nChange-Id: I4a9fec22a4437ad9e22b5049d2a7f229f5074191\nSigned-off-by: Eric Dumazet \u003cedumazet@google.com\u003e\nReviewed-by: Simon Horman \u003chorms@kernel.org\u003e\nReviewed-by: David Ahern \u003cdsahern@kernel.org\u003e\nLink: https://lore.kernel.org/r/20240507163145.835254-1-edumazet@google.com\nSigned-off-by: Jakub Kicinski \u003ckuba@kernel.org\u003e\nSigned-off-by: Sasha Levin \u003csashal@kernel.org\u003e\nSigned-off-by: Shuo Yang \u003cgshuoy@google.com\u003e\nReviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/74093\nReviewed-by: Anil Altinay \u003caaltinay@google.com\u003e\nTested-by: Cusky Presubmit Bot \u003cpresubmit@cos-infra-prod.iam.gserviceaccount.com\u003e\nReviewed-by: Oleksandr Tymoshenko \u003covt@google.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "be52b18e08a6b3313a66bbe289bd05d091f1002f",
      "old_mode": 33188,
      "old_path": "net/ipv6/fib6_rules.c",
      "new_id": "6eeab21512ba98721fbd54da2b3dfabdd7553862",
      "new_mode": 33188,
      "new_path": "net/ipv6/fib6_rules.c"
    }
  ]
}