{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2021-47419", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_taprio: properly cancel timer from taprio_destroy()\n\nThere is a comment in qdisc_create() about us not calling ops->reset()\nin some cases.\n\nerr_out4:\n\t/*\n\t * Any broken qdiscs that would require a ops->reset() here?\n\t * The qdisc was never in action so it shouldn't be necessary.\n\t */\n\nAs taprio sets a timer before actually receiving a packet, we need\nto cancel it from ops->destroy, just in case ops->reset has not\nbeen called.\n\nsyzbot reported:\n\nODEBUG: free active (active state 0) object type: hrtimer hint: advance_sched+0x0/0x9a0 arch/x86/include/asm/atomic64_64.h:22\nWARNING: CPU: 0 PID: 8441 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505\nModules linked in:\nCPU: 0 PID: 8441 Comm: syz-executor813 Not tainted 5.14.0-rc6-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505\nCode: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd e0 d3 e3 89 4c 89 ee 48 c7 c7 e0 c7 e3 89 e8 5b 86 11 05 <0f> 0b 83 05 85 03 92 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3\nRSP: 0018:ffffc9000130f330 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000\nRDX: ffff88802baeb880 RSI: ffffffff815d87b5 RDI: fffff52000261e58\nRBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000\nR10: ffffffff815d25ee R11: 0000000000000000 R12: ffffffff898dd020\nR13: ffffffff89e3ce20 R14: ffffffff81653630 R15: dffffc0000000000\nFS: 0000000000f0d300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007ffb64b3e000 CR3: 0000000036557000 CR4: 00000000001506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n __debug_check_no_obj_freed lib/debugobjects.c:987 [inline]\n debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1018\n slab_free_hook mm/slub.c:1603 [inline]\n slab_free_freelist_hook+0x171/0x240 mm/slub.c:1653\n slab_free mm/slub.c:3213 [inline]\n kfree+0xe4/0x540 mm/slub.c:4267\n qdisc_create+0xbcf/0x1320 net/sched/sch_api.c:1299\n tc_modify_qdisc+0x4c8/0x1a60 net/sched/sch_api.c:1663\n rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5571\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:2403\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2457\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "c71c512f4a65", "version_value": "c951c08a5996" }, { "version_affected": "<", "version_name": "a969a632cbe7", "version_value": "3ec73ffeef54" }, { "version_affected": "<", "version_name": "44d4775ca518", "version_value": "7a1c1af34104" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.153", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.73", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.14.12", "lessThanOrEqual": "5.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/c951c08a5996365aecbc5f1a9bddec3905e1ddfc", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c951c08a5996365aecbc5f1a9bddec3905e1ddfc" }, { "url": "https://git.kernel.org/stable/c/3ec73ffeef54596c32aff0e73fe60971b9c8b866", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3ec73ffeef54596c32aff0e73fe60971b9c8b866" }, { "url": "https://git.kernel.org/stable/c/7a1c1af341041221b3acb9d7036cc2b43e0efa75", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/7a1c1af341041221b3acb9d7036cc2b43e0efa75" }, { "url": "https://git.kernel.org/stable/c/a56d447f196fa9973c568f54c0d76d5391c3b0c0", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/a56d447f196fa9973c568f54c0d76d5391c3b0c0" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }