{"id":"CVE-2022-50817","summary":"net: hsr: avoid possible NULL deref in skb_clone()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: avoid possible NULL deref in skb_clone()\n\nsyzbot got a crash [1] in skb_clone(), caused by a bug\nin hsr_get_untagged_frame().\n\nWhen/if create_stripped_skb_hsr() returns NULL, we must\nnot attempt to call skb_clone().\n\nWhile we are at it, replace a WARN_ONCE() by netdev_warn_once().\n\n[1]\ngeneral protection fault, probably for non-canonical address 0xdffffc000000000f: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000078-0x000000000000007f]\nCPU: 1 PID: 754 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nRIP: 0010:skb_clone+0x108/0x3c0 net/core/skbuff.c:1641\nCode: 93 02 00 00 49 83 7c 24 28 00 0f 85 e9 00 00 00 e8 5d 4a 29 fa 4c 8d 75 7e 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 \u003c0f\u003e b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 9e 01 00 00\nRSP: 0018:ffffc90003ccf4e0 EFLAGS: 00010207\n\nRAX: dffffc0000000000 RBX: ffffc90003ccf5f8 RCX: ffffc9000c24b000\nRDX: 000000000000000f RSI: ffffffff8751cb13 RDI: 0000000000000000\nRBP: 0000000000000000 R08: 00000000000000f0 R09: 0000000000000140\nR10: fffffbfff181d972 R11: 0000000000000000 R12: ffff888161fc3640\nR13: 0000000000000a20 R14: 000000000000007e R15: ffffffff8dc5f620\nFS: 00007feb621e4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007feb621e3ff8 CR3: 00000001643a9000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\nhsr_get_untagged_frame+0x4e/0x610 net/hsr/hsr_forward.c:164\nhsr_forward_do net/hsr/hsr_forward.c:461 [inline]\nhsr_forward_skb+0xcca/0x1d50 net/hsr/hsr_forward.c:623\nhsr_handle_frame+0x588/0x7c0 net/hsr/hsr_slave.c:69\n__netif_receive_skb_core+0x9fe/0x38f0 net/core/dev.c:5379\n__netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5483\n__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5599\nnetif_receive_skb_internal net/core/dev.c:5685 [inline]\nnetif_receive_skb+0x12f/0x8d0 net/core/dev.c:5744\ntun_rx_batched+0x4ab/0x7a0 drivers/net/tun.c:1544\ntun_get_user+0x2686/0x3a00 drivers/net/tun.c:1995\ntun_chr_write_iter+0xdb/0x200 drivers/net/tun.c:2025\ncall_write_iter include/linux/fs.h:2187 [inline]\nnew_sync_write fs/read_write.c:491 [inline]\nvfs_write+0x9e9/0xdd0 fs/read_write.c:584\nksys_write+0x127/0x250 fs/read_write.c:637\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd","modified":"2026-04-02T08:28:46.339047Z","published":"2025-12-30T12:08:32.866Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50817.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/35ece858660eae13ee0242496a1956c39d29418e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c46f2e0fcd1ecfc6046e5cf785ff89f0572f94e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8b57135fd9ffe9a5b445350a686442a531c5339"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff7ba766758313129794f150bbc4d351b5e17a53"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50817.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50817"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f266a683a4804dc499efc6c2206ef68efed029d0"},{"fixed":"ff7ba766758313129794f150bbc4d351b5e17a53"},{"fixed":"35ece858660eae13ee0242496a1956c39d29418e"},{"fixed":"c46f2e0fcd1ecfc6046e5cf785ff89f0572f94e4"},{"fixed":"d8b57135fd9ffe9a5b445350a686442a531c5339"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50817.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.17.0"},{"fixed":"5.10.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.76"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50817.json"}}],"schema_version":"1.7.5"}