CVE-2024-26626

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ipmr: fix kernel panic when forwarding mcast packets<br /> <br /> The stacktrace was:<br /> [ 86.305548] BUG: kernel NULL pointer dereference, address: 0000000000000092<br /> [ 86.306815] #PF: supervisor read access in kernel mode<br /> [ 86.307717] #PF: error_code(0x0000) - not-present page<br /> [ 86.308624] PGD 0 P4D 0<br /> [ 86.309091] Oops: 0000 [#1] PREEMPT SMP NOPTI<br /> [ 86.309883] CPU: 2 PID: 3139 Comm: pimd Tainted: G U 6.8.0-6wind-knet #1<br /> [ 86.311027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.1-0-g0551a4be2c-prebuilt.qemu-project.org 04/01/2014<br /> [ 86.312728] RIP: 0010:ip_mr_forward (/build/work/knet/net/ipv4/ipmr.c:1985)<br /> [ 86.313399] Code: f9 1f 0f 87 85 03 00 00 48 8d 04 5b 48 8d 04 83 49 8d 44 c5 00 48 8b 40 70 48 39 c2 0f 84 d9 00 00 00 49 8b 46 58 48 83 e0 fe b8 92 00 00 00 00 0f 84 55 ff ff ff 49 83 47 38 01 45 85 e4 0f<br /> [ 86.316565] RSP: 0018:ffffad21c0583ae0 EFLAGS: 00010246<br /> [ 86.317497] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000<br /> [ 86.318596] RDX: ffff9559cb46c000 RSI: 0000000000000000 RDI: 0000000000000000<br /> [ 86.319627] RBP: ffffad21c0583b30 R08: 0000000000000000 R09: 0000000000000000<br /> [ 86.320650] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001<br /> [ 86.321672] R13: ffff9559c093a000 R14: ffff9559cc00b800 R15: ffff9559c09c1d80<br /> [ 86.322873] FS: 00007f85db661980(0000) GS:ffff955a79d00000(0000) knlGS:0000000000000000<br /> [ 86.324291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> [ 86.325314] CR2: 0000000000000092 CR3: 000000002f13a000 CR4: 0000000000350ef0<br /> [ 86.326589] Call Trace:<br /> [ 86.327036] <br /> [ 86.327434] ? show_regs (/build/work/knet/arch/x86/kernel/dumpstack.c:479)<br /> [ 86.328049] ? __die (/build/work/knet/arch/x86/kernel/dumpstack.c:421 /build/work/knet/arch/x86/kernel/dumpstack.c:434)<br /> [ 86.328508] ? page_fault_oops (/build/work/knet/arch/x86/mm/fault.c:707)<br /> [ 86.329107] ? do_user_addr_fault (/build/work/knet/arch/x86/mm/fault.c:1264)<br /> [ 86.329756] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)<br /> [ 86.330350] ? __irq_work_queue_local (/build/work/knet/kernel/irq_work.c:111 (discriminator 1))<br /> [ 86.331013] ? exc_page_fault (/build/work/knet/./arch/x86/include/asm/paravirt.h:693 /build/work/knet/arch/x86/mm/fault.c:1515 /build/work/knet/arch/x86/mm/fault.c:1563)<br /> [ 86.331702] ? asm_exc_page_fault (/build/work/knet/./arch/x86/include/asm/idtentry.h:570)<br /> [ 86.332468] ? ip_mr_forward (/build/work/knet/net/ipv4/ipmr.c:1985)<br /> [ 86.333183] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)<br /> [ 86.333920] ipmr_mfc_add (/build/work/knet/./include/linux/rcupdate.h:782 /build/work/knet/net/ipv4/ipmr.c:1009 /build/work/knet/net/ipv4/ipmr.c:1273)<br /> [ 86.334583] ? __pfx_ipmr_hash_cmp (/build/work/knet/net/ipv4/ipmr.c:363)<br /> [ 86.335357] ip_mroute_setsockopt (/build/work/knet/net/ipv4/ipmr.c:1470)<br /> [ 86.336135] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)<br /> [ 86.336854] ? ip_mroute_setsockopt (/build/work/knet/net/ipv4/ipmr.c:1470)<br /> [ 86.337679] do_ip_setsockopt (/build/work/knet/net/ipv4/ip_sockglue.c:944)<br /> [ 86.338408] ? __pfx_unix_stream_read_actor (/build/work/knet/net/unix/af_unix.c:2862)<br /> [ 86.339232] ? srso_return_thunk (/build/work/knet/arch/x86/lib/retpoline.S:223)<br /> [ 86.339809] ? aa_sk_perm (/build/work/knet/security/apparmor/include/cred.h:153 /build/work/knet/security/apparmor/net.c:181)<br /> [ 86.340342] ip_setsockopt (/build/work/knet/net/ipv4/ip_sockglue.c:1415)<br /> [ 86.340859] raw_setsockopt (/build/work/knet/net/ipv4/raw.c:836)<br /> [ 86.341408] ? security_socket_setsockopt (/build/work/knet/security/security.c:4561 (discriminator 13))<br /> [ 86.342116] sock_common_setsockopt (/build/work/knet/net/core/sock.c:3716)<br /> [ 86.342747] do_sock_setsockopt (/build/work/knet/net/socket.c:2313)<br /> [ 86.343363] __sys_setsockopt (/build/work/knet/./include/linux/file.h:32 /build/work/kn<br /> ---truncated---