{"id":"DEBIAN-CVE-2024-41000","details":"In the Linux kernel, the following vulnerability has been resolved:  block/ioctl: prefer different overflow check  Running syzkaller with the newly reintroduced signed integer overflow sanitizer shows this report:  [   62.982337] ------------[ cut here ]------------ [   62.985692] cgroup: Invalid name [   62.986211] UBSAN: signed-integer-overflow in ../block/ioctl.c:36:46 [   62.989370] 9pnet_fd: p9_fd_create_tcp (7343): problem connecting socket to 127.0.0.1 [   62.992992] 9223372036854775807 + 4095 cannot be represented in type 'long long' [   62.997827] 9pnet_fd: p9_fd_create_tcp (7345): problem connecting socket to 127.0.0.1 [   62.999369] random: crng reseeded on system resumption [   63.000634] GUP no longer grows the stack in syz-executor.2 (7353): 20002000-20003000 (20001000) [   63.000668] CPU: 0 PID: 7353 Comm: syz-executor.2 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1 [   63.000677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [   63.000682] Call Trace: [   63.000686]  \u003cTASK\u003e [   63.000731]  dump_stack_lvl+0x93/0xd0 [   63.000919]  __get_user_pages+0x903/0xd30 [   63.001030]  __gup_longterm_locked+0x153e/0x1ba0 [   63.001041]  ? _raw_read_unlock_irqrestore+0x17/0x50 [   63.001072]  ? try_get_folio+0x29c/0x2d0 [   63.001083]  internal_get_user_pages_fast+0x1119/0x1530 [   63.001109]  iov_iter_extract_pages+0x23b/0x580 [   63.001206]  bio_iov_iter_get_pages+0x4de/0x1220 [   63.001235]  iomap_dio_bio_iter+0x9b6/0x1410 [   63.001297]  __iomap_dio_rw+0xab4/0x1810 [   63.001316]  iomap_dio_rw+0x45/0xa0 [   63.001328]  ext4_file_write_iter+0xdde/0x1390 [   63.001372]  vfs_write+0x599/0xbd0 [   63.001394]  ksys_write+0xc8/0x190 [   63.001403]  do_syscall_64+0xd4/0x1b0 [   63.001421]  ? arch_exit_to_user_mode_prepare+0x3a/0x60 [   63.001479]  entry_SYSCALL_64_after_hwframe+0x6f/0x77 [   63.001535] RIP: 0033:0x7f7fd3ebf539 [   63.001551] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [   63.001562] RSP: 002b:00007f7fd32570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [   63.001584] RAX: ffffffffffffffda RBX: 00007f7fd3ff3f80 RCX: 00007f7fd3ebf539 [   63.001590] RDX: 4db6d1e4f7e43360 RSI: 0000000020000000 RDI: 0000000000000004 [   63.001595] RBP: 00007f7fd3f1e496 R08: 0000000000000000 R09: 0000000000000000 [   63.001599] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [   63.001604] R13: 0000000000000006 R14: 00007f7fd3ff3f80 R15: 00007ffd415ad2b8 ... [   63.018142] ---[ end trace ]---  Historically, the signed integer overflow sanitizer did not work in the kernel due to its interaction with `-fwrapv` but this has since been changed [1] in the newest version of Clang; It was re-enabled in the kernel with Commit 557f8c582a9ba8ab (\"ubsan: Reintroduce signed overflow sanitizer\").  Let's rework this overflow checking logic to not actually perform an overflow during the check itself, thus avoiding the UBSAN splat.  [1]: https://github.com/llvm/llvm-project/pull/82432","modified":"2026-09-15T09:03:14.328453708Z","published":"2024-07-12T13:15:20.987Z","upstream":["CVE-2024-41000"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-41000"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.99-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41000.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41000.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41000.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}