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{
"containers": {
"cna": {
"providerMetadata": {
"orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()\n\nThe following issue was observed running syzkaller:\n\nBUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline]\nBUG: KASAN: slab-out-of-bounds in sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831\nRead of size 2132 at addr ffff8880aea95dc8 by task syz-executor.0/9815\n\nCPU: 0 PID: 9815 Comm: syz-executor.0 Not tainted 4.19.202-00874-gfc0fe04215a9 #2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0xe4/0x14a lib/dump_stack.c:118\n print_address_description+0x73/0x280 mm/kasan/report.c:253\n kasan_report_error mm/kasan/report.c:352 [inline]\n kasan_report+0x272/0x370 mm/kasan/report.c:410\n memcpy+0x1f/0x50 mm/kasan/kasan.c:302\n memcpy include/linux/string.h:377 [inline]\n sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831\n fill_from_dev_buffer+0x14f/0x340 drivers/scsi/scsi_debug.c:1021\n resp_report_tgtpgs+0x5aa/0x770 drivers/scsi/scsi_debug.c:1772\n schedule_resp+0x464/0x12f0 drivers/scsi/scsi_debug.c:4429\n scsi_debug_queuecommand+0x467/0x1390 drivers/scsi/scsi_debug.c:5835\n scsi_dispatch_cmd+0x3fc/0x9b0 drivers/scsi/scsi_lib.c:1896\n scsi_request_fn+0x1042/0x1810 drivers/scsi/scsi_lib.c:2034\n __blk_run_queue_uncond block/blk-core.c:464 [inline]\n __blk_run_queue+0x1a4/0x380 block/blk-core.c:484\n blk_execute_rq_nowait+0x1c2/0x2d0 block/blk-exec.c:78\n sg_common_write.isra.19+0xd74/0x1dc0 drivers/scsi/sg.c:847\n sg_write.part.23+0x6e0/0xd00 drivers/scsi/sg.c:716\n sg_write+0x64/0xa0 drivers/scsi/sg.c:622\n __vfs_write+0xed/0x690 fs/read_write.c:485\nkill_bdev:block_device:00000000e138492c\n vfs_write+0x184/0x4c0 fs/read_write.c:549\n ksys_write+0x107/0x240 fs/read_write.c:599\n do_syscall_64+0xc2/0x560 arch/x86/entry/common.c:293\n entry_SYSCALL_64_after_hwframe+0x49/0xbe\n\nWe get 'alen' from command its type is int. If userspace passes a large\nlength we will get a negative 'alen'.\n\nSwitch n, alen, and rlen to u32."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "1da177e4c3f4",
"lessThan": "8440377e1a56",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f4",
"lessThan": "66523553fa62",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f4",
"lessThan": "f347c26836c2",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.10.82",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.5",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.16",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/8440377e1a5644779b4c8d013aa2a917f5fc83c3"
},
{
"url": "https://git.kernel.org/stable/c/66523553fa62c7878fc5441dc4e82be71934eb77"
},
{
"url": "https://git.kernel.org/stable/c/f347c26836c270199de1599c3cd466bb7747caa9"
}
],
"title": "scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()",
"x_generator": {
"engine": "bippy-d175d3acf727"
}
}
},
"cveMetadata": {
"assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
"cveID": "CVE-2021-47219",
"requesterUserId": "gregkh@kernel.org",
"serial": "1",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.0"
}
|
