gsd-2021-46938
Vulnerability from gsd
Modified
2024-02-26 06:03
Details
In the Linux kernel, the following vulnerability has been resolved:
dm rq: fix double free of blk_mq_tag_set in dev remove after table load fails
When loading a device-mapper table for a request-based mapped device,
and the allocation/initialization of the blk_mq_tag_set for the device
fails, a following device remove will cause a double free.
E.g. (dmesg):
device-mapper: core: Cannot initialize queue for request-based dm-mq mapped device
device-mapper: ioctl: unable to set up device queue for new table.
Unable to handle kernel pointer dereference in virtual kernel address space
Failing address: 0305e098835de000 TEID: 0305e098835de803
Fault in home space mode while using kernel ASCE.
AS:000000025efe0007 R3:0000000000000024
Oops: 0038 ilc:3 [#1] SMP
Modules linked in: ... lots of modules ...
Supported: Yes, External
CPU: 0 PID: 7348 Comm: multipathd Kdump: loaded Tainted: G W X 5.3.18-53-default #1 SLE15-SP3
Hardware name: IBM 8561 T01 7I2 (LPAR)
Krnl PSW : 0704e00180000000 000000025e368eca (kfree+0x42/0x330)
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3
Krnl GPRS: 000000000000004a 000000025efe5230 c1773200d779968d 0000000000000000
000000025e520270 000000025e8d1b40 0000000000000003 00000007aae10000
000000025e5202a2 0000000000000001 c1773200d779968d 0305e098835de640
00000007a8170000 000003ff80138650 000000025e5202a2 000003e00396faa8
Krnl Code: 000000025e368eb8: c4180041e100 lgrl %r1,25eba50b8
000000025e368ebe: ecba06b93a55 risbg %r11,%r10,6,185,58
#000000025e368ec4: e3b010000008 ag %r11,0(%r1)
>000000025e368eca: e310b0080004 lg %r1,8(%r11)
000000025e368ed0: a7110001 tmll %r1,1
000000025e368ed4: a7740129 brc 7,25e369126
000000025e368ed8: e320b0080004 lg %r2,8(%r11)
000000025e368ede: b904001b lgr %r1,%r11
Call Trace:
[<000000025e368eca>] kfree+0x42/0x330
[<000000025e5202a2>] blk_mq_free_tag_set+0x72/0xb8
[<000003ff801316a8>] dm_mq_cleanup_mapped_device+0x38/0x50 [dm_mod]
[<000003ff80120082>] free_dev+0x52/0xd0 [dm_mod]
[<000003ff801233f0>] __dm_destroy+0x150/0x1d0 [dm_mod]
[<000003ff8012bb9a>] dev_remove+0x162/0x1c0 [dm_mod]
[<000003ff8012a988>] ctl_ioctl+0x198/0x478 [dm_mod]
[<000003ff8012ac8a>] dm_ctl_ioctl+0x22/0x38 [dm_mod]
[<000000025e3b11ee>] ksys_ioctl+0xbe/0xe0
[<000000025e3b127a>] __s390x_sys_ioctl+0x2a/0x40
[<000000025e8c15ac>] system_call+0xd8/0x2c8
Last Breaking-Event-Address:
[<000000025e52029c>] blk_mq_free_tag_set+0x6c/0xb8
Kernel panic - not syncing: Fatal exception: panic_on_oops
When allocation/initialization of the blk_mq_tag_set fails in
dm_mq_init_request_queue(), it is uninitialized/freed, but the pointer
is not reset to NULL; so when dev_remove() later gets into
dm_mq_cleanup_mapped_device() it sees the pointer and tries to
uninitialize and free it again.
Fix this by setting the pointer to NULL in dm_mq_init_request_queue()
error-handling. Also set it to NULL in dm_mq_cleanup_mapped_device().
Aliases
{ "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2021-46938" ], "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm rq: fix double free of blk_mq_tag_set in dev remove after table load fails\n\nWhen loading a device-mapper table for a request-based mapped device,\nand the allocation/initialization of the blk_mq_tag_set for the device\nfails, a following device remove will cause a double free.\n\nE.g. (dmesg):\n device-mapper: core: Cannot initialize queue for request-based dm-mq mapped device\n device-mapper: ioctl: unable to set up device queue for new table.\n Unable to handle kernel pointer dereference in virtual kernel address space\n Failing address: 0305e098835de000 TEID: 0305e098835de803\n Fault in home space mode while using kernel ASCE.\n AS:000000025efe0007 R3:0000000000000024\n Oops: 0038 ilc:3 [#1] SMP\n Modules linked in: ... lots of modules ...\n Supported: Yes, External\n CPU: 0 PID: 7348 Comm: multipathd Kdump: loaded Tainted: G W X 5.3.18-53-default #1 SLE15-SP3\n Hardware name: IBM 8561 T01 7I2 (LPAR)\n Krnl PSW : 0704e00180000000 000000025e368eca (kfree+0x42/0x330)\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\n Krnl GPRS: 000000000000004a 000000025efe5230 c1773200d779968d 0000000000000000\n 000000025e520270 000000025e8d1b40 0000000000000003 00000007aae10000\n 000000025e5202a2 0000000000000001 c1773200d779968d 0305e098835de640\n 00000007a8170000 000003ff80138650 000000025e5202a2 000003e00396faa8\n Krnl Code: 000000025e368eb8: c4180041e100 lgrl %r1,25eba50b8\n 000000025e368ebe: ecba06b93a55 risbg %r11,%r10,6,185,58\n #000000025e368ec4: e3b010000008 ag %r11,0(%r1)\n \u003e000000025e368eca: e310b0080004 lg %r1,8(%r11)\n 000000025e368ed0: a7110001 tmll %r1,1\n 000000025e368ed4: a7740129 brc 7,25e369126\n 000000025e368ed8: e320b0080004 lg %r2,8(%r11)\n 000000025e368ede: b904001b lgr %r1,%r11\n Call Trace:\n [\u003c000000025e368eca\u003e] kfree+0x42/0x330\n [\u003c000000025e5202a2\u003e] blk_mq_free_tag_set+0x72/0xb8\n [\u003c000003ff801316a8\u003e] dm_mq_cleanup_mapped_device+0x38/0x50 [dm_mod]\n [\u003c000003ff80120082\u003e] free_dev+0x52/0xd0 [dm_mod]\n [\u003c000003ff801233f0\u003e] __dm_destroy+0x150/0x1d0 [dm_mod]\n [\u003c000003ff8012bb9a\u003e] dev_remove+0x162/0x1c0 [dm_mod]\n [\u003c000003ff8012a988\u003e] ctl_ioctl+0x198/0x478 [dm_mod]\n [\u003c000003ff8012ac8a\u003e] dm_ctl_ioctl+0x22/0x38 [dm_mod]\n [\u003c000000025e3b11ee\u003e] ksys_ioctl+0xbe/0xe0\n [\u003c000000025e3b127a\u003e] __s390x_sys_ioctl+0x2a/0x40\n [\u003c000000025e8c15ac\u003e] system_call+0xd8/0x2c8\n Last Breaking-Event-Address:\n [\u003c000000025e52029c\u003e] blk_mq_free_tag_set+0x6c/0xb8\n Kernel panic - not syncing: Fatal exception: panic_on_oops\n\nWhen allocation/initialization of the blk_mq_tag_set fails in\ndm_mq_init_request_queue(), it is uninitialized/freed, but the pointer\nis not reset to NULL; so when dev_remove() later gets into\ndm_mq_cleanup_mapped_device() it sees the pointer and tries to\nuninitialize and free it again.\n\nFix this by setting the pointer to NULL in dm_mq_init_request_queue()\nerror-handling. Also set it to NULL in dm_mq_cleanup_mapped_device().", "id": "GSD-2021-46938", "modified": "2024-02-26T06:03:52.768766Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@kernel.org", "ID": "CVE-2021-46938", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "\u003c", "version_name": "1c357a1e86a4", "version_value": "8ae0185255ea" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected", "versions": [ { "status": "affected", "version": "4.6" }, { "lessThan": "4.6", "status": "unaffected", "version": "0", "versionType": "custom" }, { "lessThanOrEqual": "4.9.*", "status": "unaffected", "version": "4.9.269", "versionType": "custom" }, { "lessThanOrEqual": "4.14.*", "status": "unaffected", "version": "4.14.233", "versionType": "custom" }, { "lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.191", "versionType": "custom" }, { "lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.118", "versionType": "custom" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.36", "versionType": "custom" }, { "lessThanOrEqual": "5.11.*", "status": "unaffected", "version": "5.11.20", "versionType": "custom" }, { "lessThanOrEqual": "5.12.*", "status": "unaffected", "version": "5.12.3", "versionType": "custom" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix" } ] } } ] } } ] }, "vendor_name": "Linux" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm rq: fix double free of blk_mq_tag_set in dev remove after table load fails\n\nWhen loading a device-mapper table for a request-based mapped device,\nand the allocation/initialization of the blk_mq_tag_set for the device\nfails, a following device remove will cause a double free.\n\nE.g. (dmesg):\n device-mapper: core: Cannot initialize queue for request-based dm-mq mapped device\n device-mapper: ioctl: unable to set up device queue for new table.\n Unable to handle kernel pointer dereference in virtual kernel address space\n Failing address: 0305e098835de000 TEID: 0305e098835de803\n Fault in home space mode while using kernel ASCE.\n AS:000000025efe0007 R3:0000000000000024\n Oops: 0038 ilc:3 [#1] SMP\n Modules linked in: ... lots of modules ...\n Supported: Yes, External\n CPU: 0 PID: 7348 Comm: multipathd Kdump: loaded Tainted: G W X 5.3.18-53-default #1 SLE15-SP3\n Hardware name: IBM 8561 T01 7I2 (LPAR)\n Krnl PSW : 0704e00180000000 000000025e368eca (kfree+0x42/0x330)\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\n Krnl GPRS: 000000000000004a 000000025efe5230 c1773200d779968d 0000000000000000\n 000000025e520270 000000025e8d1b40 0000000000000003 00000007aae10000\n 000000025e5202a2 0000000000000001 c1773200d779968d 0305e098835de640\n 00000007a8170000 000003ff80138650 000000025e5202a2 000003e00396faa8\n Krnl Code: 000000025e368eb8: c4180041e100 lgrl %r1,25eba50b8\n 000000025e368ebe: ecba06b93a55 risbg %r11,%r10,6,185,58\n #000000025e368ec4: e3b010000008 ag %r11,0(%r1)\n \u003e000000025e368eca: e310b0080004 lg %r1,8(%r11)\n 000000025e368ed0: a7110001 tmll %r1,1\n 000000025e368ed4: a7740129 brc 7,25e369126\n 000000025e368ed8: e320b0080004 lg %r2,8(%r11)\n 000000025e368ede: b904001b lgr %r1,%r11\n Call Trace:\n [\u003c000000025e368eca\u003e] kfree+0x42/0x330\n [\u003c000000025e5202a2\u003e] blk_mq_free_tag_set+0x72/0xb8\n [\u003c000003ff801316a8\u003e] dm_mq_cleanup_mapped_device+0x38/0x50 [dm_mod]\n [\u003c000003ff80120082\u003e] free_dev+0x52/0xd0 [dm_mod]\n [\u003c000003ff801233f0\u003e] __dm_destroy+0x150/0x1d0 [dm_mod]\n [\u003c000003ff8012bb9a\u003e] dev_remove+0x162/0x1c0 [dm_mod]\n [\u003c000003ff8012a988\u003e] ctl_ioctl+0x198/0x478 [dm_mod]\n [\u003c000003ff8012ac8a\u003e] dm_ctl_ioctl+0x22/0x38 [dm_mod]\n [\u003c000000025e3b11ee\u003e] ksys_ioctl+0xbe/0xe0\n [\u003c000000025e3b127a\u003e] __s390x_sys_ioctl+0x2a/0x40\n [\u003c000000025e8c15ac\u003e] system_call+0xd8/0x2c8\n Last Breaking-Event-Address:\n [\u003c000000025e52029c\u003e] blk_mq_free_tag_set+0x6c/0xb8\n Kernel panic - not syncing: Fatal exception: panic_on_oops\n\nWhen allocation/initialization of the blk_mq_tag_set fails in\ndm_mq_init_request_queue(), it is uninitialized/freed, but the pointer\nis not reset to NULL; so when dev_remove() later gets into\ndm_mq_cleanup_mapped_device() it sees the pointer and tries to\nuninitialize and free it again.\n\nFix this by setting the pointer to NULL in dm_mq_init_request_queue()\nerror-handling. Also set it to NULL in dm_mq_cleanup_mapped_device()." } ] }, "generator": { "engine": "bippy-b01c2a820106" }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/stable/c/8ae0185255eaf05bd66f4215c81e99bf01140fd9", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/8ae0185255eaf05bd66f4215c81e99bf01140fd9" }, { "name": "https://git.kernel.org/stable/c/b42c0a33dfdd451d9be62dd5de58c39f2750b6e3", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/b42c0a33dfdd451d9be62dd5de58c39f2750b6e3" }, { "name": "https://git.kernel.org/stable/c/772b9f59657665af3b68d24d12b9d172d31f0dfb", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/772b9f59657665af3b68d24d12b9d172d31f0dfb" }, { "name": "https://git.kernel.org/stable/c/a992a283c0b77d0a7c2c348add0e6a21fb1dab67", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/a992a283c0b77d0a7c2c348add0e6a21fb1dab67" }, { "name": "https://git.kernel.org/stable/c/1cb02dc76f4c0a2749a02b26469512d6984252e9", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/1cb02dc76f4c0a2749a02b26469512d6984252e9" }, { "name": "https://git.kernel.org/stable/c/6086f957416a6e87236c06079fcaba7a3998aeca", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/6086f957416a6e87236c06079fcaba7a3998aeca" }, { "name": "https://git.kernel.org/stable/c/d757bf4c69cda3c3ab7f775dfabbf5a80e2f6f9d", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/d757bf4c69cda3c3ab7f775dfabbf5a80e2f6f9d" }, { "name": "https://git.kernel.org/stable/c/8e947c8f4a5620df77e43c9c75310dc510250166", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/8e947c8f4a5620df77e43c9c75310dc510250166" } ] } }, "nvd.nist.gov": { "cve": { "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "487E21A9-6030-4B46-AFC1-E100B4C43057", "versionEndExcluding": "4.9.269", "versionStartIncluding": "4.6.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20505383-2EB8-41EF-A91B-F185B4FB81DF", "versionEndExcluding": "4.14.233", "versionStartIncluding": "4.10.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B7281E1E-A00B-49C0-A849-9CE1CE780227", "versionEndExcluding": "4.19.191", "versionStartIncluding": "4.15.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5670AEA3-082C-42D6-A067-CD9ECED4B84B", "versionEndExcluding": "5.4.118", "versionStartIncluding": "4.20.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C7148769-B830-4B8F-986F-E0C85A19FC7F", "versionEndExcluding": "5.10.36", "versionStartIncluding": "5.5.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EFB425F0-C28C-4B44-8B4C-AD512AA832DE", "versionEndExcluding": "5.11.20", "versionStartIncluding": "5.11.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C3814FA3-8141-4313-A852-8C4212BE12AD", "versionEndExcluding": "5.12.3", "versionStartIncluding": "5.12.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm rq: fix double free of blk_mq_tag_set in dev remove after table load fails\n\nWhen loading a device-mapper table for a request-based mapped device,\nand the allocation/initialization of the blk_mq_tag_set for the device\nfails, a following device remove will cause a double free.\n\nE.g. (dmesg):\n device-mapper: core: Cannot initialize queue for request-based dm-mq mapped device\n device-mapper: ioctl: unable to set up device queue for new table.\n Unable to handle kernel pointer dereference in virtual kernel address space\n Failing address: 0305e098835de000 TEID: 0305e098835de803\n Fault in home space mode while using kernel ASCE.\n AS:000000025efe0007 R3:0000000000000024\n Oops: 0038 ilc:3 [#1] SMP\n Modules linked in: ... lots of modules ...\n Supported: Yes, External\n CPU: 0 PID: 7348 Comm: multipathd Kdump: loaded Tainted: G W X 5.3.18-53-default #1 SLE15-SP3\n Hardware name: IBM 8561 T01 7I2 (LPAR)\n Krnl PSW : 0704e00180000000 000000025e368eca (kfree+0x42/0x330)\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\n Krnl GPRS: 000000000000004a 000000025efe5230 c1773200d779968d 0000000000000000\n 000000025e520270 000000025e8d1b40 0000000000000003 00000007aae10000\n 000000025e5202a2 0000000000000001 c1773200d779968d 0305e098835de640\n 00000007a8170000 000003ff80138650 000000025e5202a2 000003e00396faa8\n Krnl Code: 000000025e368eb8: c4180041e100 lgrl %r1,25eba50b8\n 000000025e368ebe: ecba06b93a55 risbg %r11,%r10,6,185,58\n #000000025e368ec4: e3b010000008 ag %r11,0(%r1)\n \u003e000000025e368eca: e310b0080004 lg %r1,8(%r11)\n 000000025e368ed0: a7110001 tmll %r1,1\n 000000025e368ed4: a7740129 brc 7,25e369126\n 000000025e368ed8: e320b0080004 lg %r2,8(%r11)\n 000000025e368ede: b904001b lgr %r1,%r11\n Call Trace:\n [\u003c000000025e368eca\u003e] kfree+0x42/0x330\n [\u003c000000025e5202a2\u003e] blk_mq_free_tag_set+0x72/0xb8\n [\u003c000003ff801316a8\u003e] dm_mq_cleanup_mapped_device+0x38/0x50 [dm_mod]\n [\u003c000003ff80120082\u003e] free_dev+0x52/0xd0 [dm_mod]\n [\u003c000003ff801233f0\u003e] __dm_destroy+0x150/0x1d0 [dm_mod]\n [\u003c000003ff8012bb9a\u003e] dev_remove+0x162/0x1c0 [dm_mod]\n [\u003c000003ff8012a988\u003e] ctl_ioctl+0x198/0x478 [dm_mod]\n [\u003c000003ff8012ac8a\u003e] dm_ctl_ioctl+0x22/0x38 [dm_mod]\n [\u003c000000025e3b11ee\u003e] ksys_ioctl+0xbe/0xe0\n [\u003c000000025e3b127a\u003e] __s390x_sys_ioctl+0x2a/0x40\n [\u003c000000025e8c15ac\u003e] system_call+0xd8/0x2c8\n Last Breaking-Event-Address:\n [\u003c000000025e52029c\u003e] blk_mq_free_tag_set+0x6c/0xb8\n Kernel panic - not syncing: Fatal exception: panic_on_oops\n\nWhen allocation/initialization of the blk_mq_tag_set fails in\ndm_mq_init_request_queue(), it is uninitialized/freed, but the pointer\nis not reset to NULL; so when dev_remove() later gets into\ndm_mq_cleanup_mapped_device() it sees the pointer and tries to\nuninitialize and free it again.\n\nFix this by setting the pointer to NULL in dm_mq_init_request_queue()\nerror-handling. Also set it to NULL in dm_mq_cleanup_mapped_device()." }, { "lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: dm rq: corrige la liberaci\u00f3n doble de blk_mq_tag_set en dev y se elimina despu\u00e9s de que falla la carga de la tabla Al cargar una tabla de mapeador de dispositivos para un dispositivo mapeado basado en solicitudes y la asignaci\u00f3n/inicializaci\u00f3n de blk_mq_tag_set Si el dispositivo falla, la siguiente eliminaci\u00f3n del dispositivo provocar\u00e1 una doble liberaci\u00f3n. Por ejemplo, (dmesg): mapeador de dispositivos: n\u00facleo: no se puede inicializar la cola para el dispositivo asignado dm-mq basado en solicitudes mapeador de dispositivos: ioctl: no se puede configurar la cola de dispositivos para una nueva tabla. No se puede manejar la desreferencia del puntero del kernel en el espacio de direcciones virtual del kernel Direcci\u00f3n fallida: 0305e098835de000 TEID: 0305e098835de803 Fallo en el modo de espacio de inicio mientras se usa el kernel ASCE. AS:000000025efe0007 R3:0000000000000024 Ups: 0038 ilc:3 [#1] M\u00f3dulos SMP vinculados en: ... muchos m\u00f3dulos ... Compatible: S\u00ed, CPU externa: 0 PID: 7348 Comm: multipathd Kdump: cargado Contaminado: GWX 5.3.18-53-default #1 SLE15-SP3 Nombre de hardware: IBM 8561 T01 7I2 (LPAR) Krnl PSW: 0704e00180000000 000000025e368eca (kfree+0x42/0x330) R:0 T:1 IO:1 EX:1 Clave:0 M :1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3 Krnl GPRS: 000000000000004a 000000025efe5230 c1773200d779968d 00000000000000000 000000025e520270 000000025 e8d1b40 0000000000000003 00000007aae10000 000000025e5202a2 0000000000000001 c1773200d779968d 0305e098835de640 00000007a8170000 0 00003ff80138650 000000025e5202a2 000003e00396faa8 C\u00f3digo Krnl: 000000025e368eb8: c4180041e100 lgrl % r1,25eba50b8 000000025e368ebe: ecba06b93a55 risbg %r11,%r10,6,185,58 #000000025e368ec4: e3b010000008 ag %r11,0(%r1) \u0026gt;000000025e368eca: e310 b0080004 lg %r1,8(%r11) 000000025e368ed0: a7110001 tmll %r1,1 000000025e368ed4: a7740129 brc 7,25e369126 000000025e368ed8: e320b0080004 lg %r2,8(%r11) 000000025e368ede: b904001b lgr %r1,%r11 Seguimiento de llamadas: [\u0026lt;0 00000025e368eca\u0026gt;] kfree+0x42/0x330 [\u0026lt;000000025e5202a2\u0026gt;] blk_mq_free_tag_set+0x72/ 0xb8 [\u0026lt;000003ff801316a8\u0026gt;] dm_mq_cleanup_mapped_device+0x38/0x50 [dm_mod] [\u0026lt;000003ff80120082\u0026gt;] free_dev+0x52/0xd0 [dm_mod] [\u0026lt;000003ff801233f0\u0026gt;] __dm_destroy+0x1 50/0x1d0 [dm_mod] [\u0026lt;000003ff8012bb9a\u0026gt;] dev_remove+0x162/0x1c0 [dm_mod] [\u0026lt;000003ff8012a988\u0026gt;] ctl_ioctl+0x198/0x478 [dm_mod] [\u0026lt;000003ff8012ac8a\u0026gt;] dm_ctl_ioctl+0x22/0x38 [dm_mod] [\u0026lt;000000025e3b11ee\u0026gt;] ksys_ioctl+0xbe /0xe0 [\u0026lt;000000025e3b127a\u0026gt;] __s390x_sys_ioctl+0x2a/0x40 [ \u0026lt;000000025e8c15ac\u0026gt;] system_call+0xd8/0x2c8 \u00daltima direcci\u00f3n del evento de \u00faltima hora: [\u0026lt;000000025e52029c\u0026gt;] blk_mq_free_tag_set+0x6c/0xb8 P\u00e1nico del kernel: no se sincroniza: excepci\u00f3n grave: p\u00e1nico_on_oops Cuando la asignaci\u00f3n/inicializaci\u00f3n de blk_mq_tag_set falla en d m_mq_init_request_queue(), no est\u00e1 inicializado/liberado, pero el puntero no se restablece a NULL; entonces, cuando dev_remove() ingresa m\u00e1s tarde a dm_mq_cleanup_mapped_device(), ve el puntero e intenta desinicializarlo y liberarlo nuevamente. Solucione este problema estableciendo el puntero en NULL en el manejo de errores dm_mq_init_request_queue(). Tambi\u00e9n config\u00farelo en NULL en dm_mq_cleanup_mapped_device()." } ], "id": "CVE-2021-46938", "lastModified": "2024-04-10T19:20:55.173", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary" } ] }, "published": "2024-02-27T19:04:05.823", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/1cb02dc76f4c0a2749a02b26469512d6984252e9" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/6086f957416a6e87236c06079fcaba7a3998aeca" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/772b9f59657665af3b68d24d12b9d172d31f0dfb" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/8ae0185255eaf05bd66f4215c81e99bf01140fd9" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/8e947c8f4a5620df77e43c9c75310dc510250166" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/a992a283c0b77d0a7c2c348add0e6a21fb1dab67" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/b42c0a33dfdd451d9be62dd5de58c39f2750b6e3" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": [ "Patch" ], "url": "https://git.kernel.org/stable/c/d757bf4c69cda3c3ab7f775dfabbf5a80e2f6f9d" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-415" } ], "source": "nvd@nist.gov", "type": "Primary" } ] } } } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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