cve-2021-47219
Vulnerability from cvelistv5
Published
2024-04-10 19:01
Modified
2024-11-04 12:01
Severity ?
Summary
scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66523553fa62c7878fc5441dc4e82be71934eb77
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8440377e1a5644779b4c8d013aa2a917f5fc83c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f347c26836c270199de1599c3cd466bb7747caa9
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

To clipboard 

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    "cna": {
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          "product": "Linux",
          "programFiles": [
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          "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 \u0027alen\u0027 from command its type is int. If userspace passes a large\nlength we will get a negative \u0027alen\u0027.\n\nSwitch n, alen, and rlen to u32."
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    "datePublished": "2024-04-10T19:01:57.694Z",
    "dateReserved": "2024-04-10T18:59:19.528Z",
    "dateUpdated": "2024-11-04T12:01:44.089Z",
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}


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