{ "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: hamradio: fix memory leak in mkiss_close\n\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\n\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\n\nFail log:\n\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0.............\n 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............\n backtrace:\n [] kvmalloc_node+0x61/0xf0\n [] alloc_netdev_mqs+0x98/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(....\n 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@..........\n backtrace:\n [] __hw_addr_create_ex+0x5b/0x310\n [] __hw_addr_add_ex+0x1f8/0x2b0\n [] dev_addr_init+0x10b/0x1f0\n [] alloc_netdev_mqs+0x13b/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............\n 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................\n backtrace:\n [] kvmalloc_node+0x61/0xf0\n [] alloc_netdev_mqs+0x777/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\n comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [] kvmalloc_node+0x61/0xf0\n [] alloc_netdev_mqs+0x912/0xe80\n [] mkiss_open+0xb2/0x6f0 [1]\n [] tty_ldisc_open+0x9b/0x110\n [] tty_set_ldisc+0x2e8/0x670\n [] tty_ioctl+0xda3/0x1440\n [] __x64_sys_ioctl+0x193/0x200\n [] do_syscall_64+0x3a/0xb0\n [] entry_SYSCALL_64_after_hwframe+0x44/0xae" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/hamradio/mkiss.c" ], "versions": [ { "version": "815f62bf7427", "lessThan": "c634ba0b4159", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "3942d0f9ace1", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "765a8a04f828", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "c16c4716a1b5", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "a49cbb762ef2", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "290b0b6432e2", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "f4de2b43d13b", "status": "affected", "versionType": "git" }, { "version": "815f62bf7427", "lessThan": "7edcc6823014", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/hamradio/mkiss.c" ], "versions": [ { "version": "2.6.14", "status": "affected" }, { "version": "0", "lessThan": "2.6.14", "status": "unaffected", "versionType": "custom" }, { "version": "4.4.274", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.9.274", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.14.238", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.196", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.128", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.46", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.12.13", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5" }, { "url": "https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b" }, { "url": "https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3" }, { "url": "https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119" }, { "url": "https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d" }, { "url": "https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f" }, { "url": "https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd" }, { "url": "https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13" } ], "title": "net: hamradio: fix memory leak in mkiss_close", "x_generator": { "engine": "bippy-a5840b7849dd" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2021-47237", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }