cve-2021-47418
Vulnerability from cvelistv5
Published
2024-05-21 15:04
Modified
2024-12-19 07:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net_sched: fix NULL deref in fifo_set_limit() syzbot reported another NULL deref in fifo_set_limit() [1] I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev lo parent 1:0 pfifo_fast tc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit pfifo_fast does not have a change() operation. Make fifo_set_limit() more robust about this. [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000e2f7310 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffffff8d6ecc00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888024c27910 RDI: ffff888071e34000 RBP: ffff888071e34000 R08: 0000000000000001 R09: ffffffff8fcfb947 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888024c27910 R13: ffff888071e34018 R14: 0000000000000000 R15: ffff88801ef74800 FS: 00007f321d897700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000722c3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fifo_set_limit net/sched/sch_fifo.c:242 [inline] fifo_set_limit+0x198/0x210 net/sched/sch_fifo.c:227 tbf_change+0x6ec/0x16d0 net/sched/sch_tbf.c:418 qdisc_change net/sched/sch_api.c:1332 [inline] tc_modify_qdisc+0xd9a/0x1a60 net/sched/sch_api.c:1634 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68f
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14
Impacted products
Vendor Product Version
Linux Linux Version: 2.6.27
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: fix NULL deref in fifo_set_limit()\n\nsyzbot reported another NULL deref in fifo_set_limit() [1]\n\nI could repro the issue with :\n\nunshare -n\ntc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit\ntc qd replace dev lo parent 1:0 pfifo_fast\ntc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit\n\npfifo_fast does not have a change() operation.\nMake fifo_set_limit() more robust about this.\n\n[1]\nBUG: kernel NULL pointer dereference, address: 0000000000000000\nPGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0\nOops: 0010 [#1] PREEMPT SMP KASAN\nCPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:0x0\nCode: Unable to access opcode bytes at RIP 0xffffffffffffffd6.\nRSP: 0018:ffffc9000e2f7310 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: ffffffff8d6ecc00 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffff888024c27910 RDI: ffff888071e34000\nRBP: ffff888071e34000 R08: 0000000000000001 R09: ffffffff8fcfb947\nR10: 0000000000000001 R11: 0000000000000000 R12: ffff888024c27910\nR13: ffff888071e34018 R14: 0000000000000000 R15: ffff88801ef74800\nFS:  00007f321d897700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffffffffd6 CR3: 00000000722c3000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n fifo_set_limit net/sched/sch_fifo.c:242 [inline]\n fifo_set_limit+0x198/0x210 net/sched/sch_fifo.c:227\n tbf_change+0x6ec/0x16d0 net/sched/sch_tbf.c:418\n qdisc_change net/sched/sch_api.c:1332 [inline]\n tc_modify_qdisc+0xd9a/0x1a60 net/sched/sch_api.c:1634\n rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572\n netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504\n netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340\n netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929\n sock_sendmsg_nosec net/socket.c:704 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:724\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2463\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47418",
    "datePublished": "2024-05-21T15:04:07.333Z",
    "dateReserved": "2024-05-21T14:58:30.818Z",
    "dateUpdated": "2024-12-19T07:41:36.446Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47418\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:27.257\",\"lastModified\":\"2024-11-21T06:36:06.193\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet_sched: fix NULL deref in fifo_set_limit()\\n\\nsyzbot reported another NULL deref in fifo_set_limit() [1]\\n\\nI could repro the issue with :\\n\\nunshare -n\\ntc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit\\ntc qd replace dev lo parent 1:0 pfifo_fast\\ntc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit\\n\\npfifo_fast does not have a change() operation.\\nMake fifo_set_limit() more robust about this.\\n\\n[1]\\nBUG: kernel NULL pointer dereference, address: 0000000000000000\\nPGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0\\nOops: 0010 [#1] PREEMPT SMP KASAN\\nCPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\nRIP: 0010:0x0\\nCode: Unable to access opcode bytes at RIP 0xffffffffffffffd6.\\nRSP: 0018:ffffc9000e2f7310 EFLAGS: 00010246\\nRAX: dffffc0000000000 RBX: ffffffff8d6ecc00 RCX: 0000000000000000\\nRDX: 0000000000000000 RSI: ffff888024c27910 RDI: ffff888071e34000\\nRBP: ffff888071e34000 R08: 0000000000000001 R09: ffffffff8fcfb947\\nR10: 0000000000000001 R11: 0000000000000000 R12: ffff888024c27910\\nR13: ffff888071e34018 R14: 0000000000000000 R15: ffff88801ef74800\\nFS:  00007f321d897700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: ffffffffffffffd6 CR3: 00000000722c3000 CR4: 00000000003506e0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n fifo_set_limit net/sched/sch_fifo.c:242 [inline]\\n fifo_set_limit+0x198/0x210 net/sched/sch_fifo.c:227\\n tbf_change+0x6ec/0x16d0 net/sched/sch_tbf.c:418\\n qdisc_change net/sched/sch_api.c:1332 [inline]\\n tc_modify_qdisc+0xd9a/0x1a60 net/sched/sch_api.c:1634\\n rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572\\n netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504\\n netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340\\n netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929\\n sock_sendmsg_nosec net/socket.c:704 [inline]\\n sock_sendmsg+0xcf/0x120 net/socket.c:724\\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409\\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2463\\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net_sched: corrige el deref NULL en fifo_set_limit() syzbot inform\u00f3 otro deref NULL en fifo_set_limit() [1] Podr\u00eda reproducir el problema con: unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd reemplazar dev lo parent 1:0 pfifo_fast tc qd cambiar dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit pfifo_fast no tiene una operaci\u00f3n de cambio(). Haga que fifo_set_limit() sea m\u00e1s s\u00f3lido al respecto. [1] BUG: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000000 PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0 Ups: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14443 Comm: syz-executor959 No contaminado 5. 15.0-rc3- syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 C\u00f3digo: No se puede acceder a los bytes del c\u00f3digo de operaci\u00f3n en RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000e2f7310 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffffff8d6ecc00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: c27910 RDI: ffff888071e34000 RBP: ffff888071e34000 R08: 0000000000000001 R09: ffffffff8fcfb947 R10: 00000000000000001 R11: 0000000000000000 R12 : ffff888024c27910 R13: ffff888071e34018 R14: 00000000000000000 R15: ffff88801ef74800 FS: 00007f321d897700(0000) GS:ffff8880b9d00000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 50033 CR2: ffffffffffffffd6 CR3: 00000000722c3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: fifo_set_limit net/sched/sch_fifo.c:242 [en l\u00ednea] fifo_set_limit+0x198/0x210 net/sched/sch_fifo.c:227 6ec/0x16d0 net/sched/sch_tbf.c: 418 qdisc_change net/sched/sch_api.c:1332 [en l\u00ednea] tc_modify_qdisc+0xd9a/0x1a60 net/sched/sch_api.c:1634 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572 netlink_rcv_skb+0x153/0x42 0 red/enlace de red /af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [en l\u00ednea] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/ socket.c:704 [en l\u00ednea] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmsg+0xe5/0 x1b0 neto /socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [en l\u00ednea] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 Entry_SYSCALL_64_after_hwframe+0x44/0xae\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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