| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_ets: don't remove idle classes from the round-robin list\n\nShuang reported that the following script:\n\n 1) tc qdisc add dev ddd0 handle 10: parent 1: ets bands 8 strict 4 priomap 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7\n 2) mausezahn ddd0 -A 10.10.10.1 -B 10.10.10.2 -c 0 -a own -b 00:c1:a0:c1:a0:00 -t udp &\n 3) tc qdisc change dev ddd0 handle 10: ets bands 4 strict 2 quanta 2500 2500 priomap 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3\n\ncrashes systematically when line 2) is commented:\n\n list_del corruption, ffff8e028404bd30->next is LIST_POISON1 (dead000000000100)\n ------------[ cut here ]------------\n kernel BUG at lib/list_debug.c:47!\n invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 0 PID: 954 Comm: tc Not tainted 5.16.0-rc4+ #478\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\n RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x47\n Code: fe ff 0f 0b 48 89 c1 4c 89 c6 48 c7 c7 08 42 1b 87 e8 1d c5 fe ff 0f 0b 48 89 fe 48 89 c2 48 c7 c7 98 42 1b 87 e8 09 c5 fe ff <0f> 0b 48 c7 c7 48 43 1b 87 e8 fb c4 fe ff 0f 0b 48 89 f2 48 89 fe\n RSP: 0018:ffffae46807a3888 EFLAGS: 00010246\n RAX: 000000000000004e RBX: 0000000000000007 RCX: 0000000000000202\n RDX: 0000000000000000 RSI: ffffffff871ac536 RDI: 00000000ffffffff\n RBP: ffffae46807a3a10 R08: 0000000000000000 R09: c0000000ffff7fff\n R10: 0000000000000001 R11: ffffae46807a36a8 R12: ffff8e028404b800\n R13: ffff8e028404bd30 R14: dead000000000100 R15: ffff8e02fafa2400\n FS: 00007efdc92e4480(0000) GS:ffff8e02fb600000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000682f48 CR3: 00000001058be000 CR4: 0000000000350ef0\n Call Trace:\n <TASK>\n ets_qdisc_change+0x58b/0xa70 [sch_ets]\n tc_modify_qdisc+0x323/0x880\n rtnetlink_rcv_msg+0x169/0x4a0\n netlink_rcv_skb+0x50/0x100\n netlink_unicast+0x1a5/0x280\n netlink_sendmsg+0x257/0x4d0\n sock_sendmsg+0x5b/0x60\n ____sys_sendmsg+0x1f2/0x260\n ___sys_sendmsg+0x7c/0xc0\n __sys_sendmsg+0x57/0xa0\n do_syscall_64+0x3a/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7efdc8031338\n Code: 89 02 48 c7 c0 ff ff ff ff eb b5 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 8d 05 25 43 2c 00 8b 00 85 c0 75 17 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 41 54 41 89 d4 55\n RSP: 002b:00007ffdf1ce9828 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\n RAX: ffffffffffffffda RBX: 0000000061b37a97 RCX: 00007efdc8031338\n RDX: 0000000000000000 RSI: 00007ffdf1ce9890 RDI: 0000000000000003\n RBP: 0000000000000000 R08: 0000000000000001 R09: 000000000078a940\n R10: 000000000000000c R11: 0000000000000246 R12: 0000000000000001\n R13: 0000000000688880 R14: 0000000000000000 R15: 0000000000000000\n </TASK>\n Modules linked in: sch_ets sch_tbf dummy rfkill iTCO_wdt iTCO_vendor_support intel_rapl_msr intel_rapl_common joydev pcspkr i2c_i801 virtio_balloon i2c_smbus lpc_ich ip_tables xfs libcrc32c crct10dif_pclmul crc32_pclmul crc32c_intel serio_raw ghash_clmulni_intel ahci libahci libata virtio_blk virtio_console virtio_net net_failover failover sunrpc dm_mirror dm_region_hash dm_log dm_mod [last unloaded: sch_ets]\n ---[ end trace f35878d1912655c2 ]---\n RIP: 0010:__list_del_entry_valid.cold.1+0x12/0x47\n Code: fe ff 0f 0b 48 89 c1 4c 89 c6 48 c7 c7 08 42 1b 87 e8 1d c5 fe ff 0f 0b 48 89 fe 48 89 c2 48 c7 c7 98 42 1b 87 e8 09 c5 fe ff <0f> 0b 48 c7 c7 48 43 1b 87 e8 fb c4 fe ff 0f 0b 48 89 f2 48 89 fe\n RSP: 0018:ffffae46807a3888 EFLAGS: 00010246\n RAX: 000000000000004e RBX: 0000000000000007 RCX: 0000000000000202\n RDX: 0000000000000000 RSI: ffffffff871ac536 RDI: 00000000ffffffff\n RBP: ffffae46807a3a10 R08: 0000000000000000 R09: c0000000ffff7fff\n R10: 0000000000000001 R11: ffffae46807a36a8 R12: ffff8e028404b800\n R13: ffff8e028404bd30 R14: dead000000000100 R15: ffff8e02fafa2400\n FS: 00007efdc92e4480(0000) GS:ffff8e02fb600000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 000000000\n---truncated---" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/sched/sch_ets.c" |
| ], |
| "versions": [ |
| { |
| "version": "ae2659d2c670252759ee9c823c4e039c0e05a6f2", |
| "lessThan": "81fbdd45652d8605a029e78ef14a6aaa529c4e72", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "e25bdbc7e951ae5728fee1f4c09485df113d013c", |
| "lessThan": "491c1253441e2fdc8f6a6f4976e3f13440419b7a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "de6d25924c2a8c2988c6a385990cafbe742061bf", |
| "lessThan": "c062f2a0b04d86c5b8c9d973bea43493eaca3d32", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/sched/sch_ets.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.10.83", |
| "lessThan": "5.10.88", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.6", |
| "lessThan": "5.15.11", |
| "status": "affected", |
| "versionType": "semver" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.10.83", |
| "versionEndExcluding": "5.10.88" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.15.6", |
| "versionEndExcluding": "5.15.11" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/81fbdd45652d8605a029e78ef14a6aaa529c4e72" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/491c1253441e2fdc8f6a6f4976e3f13440419b7a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/c062f2a0b04d86c5b8c9d973bea43493eaca3d32" |
| } |
| ], |
| "title": "net/sched: sch_ets: don't remove idle classes from the round-robin list", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47595", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
