Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: gue: Fix skb memleak with inner IP protocol 0. syzbot reported skb memleak below. [0] The repro generated a GUE packet with its inner protocol 0. gue_udp_recv() returns -guehdr->proto_ctype for "resubmit" in ip_protocol_deliver_rcu(), but this only works with non-zero protocol number. Let's drop such packets. Note that 0 is a valid number (IPv6 Hop-by-Hop Option). I think it is not practical to encap HOPOPT in GUE, so once someone starts to complain, we could pass down a resubmit flag pointer to distinguish two zeros from the upper layer: * no error * resubmit HOPOPT [0] BUG: memory leak unreferenced object 0xffff888109695a00 (size 240): comm "syz.0.17", pid 6088, jiffies 4294943096 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 40 c2 10 81 88 ff ff 00 00 00 00 00 00 00 00 .@.............. backtrace (crc a84b336f): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x3b4/0x590 mm/slub.c:5270 __build_skb+0x23/0x60 net/core/skbuff.c:474 build_skb+0x20/0x190 net/core/skbuff.c:490 __tun_build_skb drivers/net/tun.c:1541 [inline] tun_build_skb+0x4a1/0xa40 drivers/net/tun.c:1636 tun_get_user+0xc12/0x2030 drivers/net/tun.c:1770 tun_chr_write_iter+0x71/0x120 drivers/net/tun.c:1999 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x45d/0x710 fs/read_write.c:686 ksys_write+0xa7/0x170 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before 886f186328b718400dbf79e1bc8cbcbd710ab766; affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before 380a82d36e37db49fd41ecc378c22fd29392e96a; affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before 536f5bbc322eb1e175bdd1ced22b236a951c4d8f; affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before f87b9b7a618c82e7465e872eb10e14c803871892; affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before ce569b389a5c78d64788a5ea94560e17fa574b35; affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before 5437a279804ced8088cabb945dba88a26d828f8c; affected 37dd0247797b168ad1cc7f5dbec825a1ee66535b before 9a56796ad258786d3624eef5aefba394fc9bdded |
| Linux / Linux | affected 3.18; unaffected 0 before 3.18; unaffected 5.10.249 through 5.10.*; unaffected 5.15.199 through 5.15.*; unaffected 6.1.162 through 6.1.*; unaffected 6.6.122 through 6.6.*; unaffected 6.12.68 through 6.12.*; unaffected 6.18.8 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/886f186328b718400dbf79e1bc8cbcbd710ab766
- https://git.kernel.org/stable/c/380a82d36e37db49fd41ecc378c22fd29392e96a
- https://git.kernel.org/stable/c/536f5bbc322eb1e175bdd1ced22b236a951c4d8f
- https://git.kernel.org/stable/c/f87b9b7a618c82e7465e872eb10e14c803871892
- https://git.kernel.org/stable/c/ce569b389a5c78d64788a5ea94560e17fa574b35
- https://git.kernel.org/stable/c/5437a279804ced8088cabb945dba88a26d828f8c
- https://git.kernel.org/stable/c/9a56796ad258786d3624eef5aefba394fc9bdded
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.