CVE-2024-26871
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-26871
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26871.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-26871
- Downstream
- Published
- 2024-04-17T10:27:31Z
- Modified
- 2025-10-09T05:01:30.264663Z
- Summary
- f2fs: fix NULL pointer dereference in f2fs_submit_page_write()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix NULL pointer dereference in f2fssubmitpage_write()
BUG: kernel NULL pointer dereference, address: 0000000000000014 RIP: 0010:f2fssubmitpagewrite+0x6cf/0x780 [f2fs] Call Trace: <TASK> ? showregs+0x6e/0x80 ? _die+0x29/0x70 ? pagefaultoops+0x154/0x4a0 ? prbreadvalid+0x20/0x30 ? _irqworkqueuelocal+0x39/0xd0 ? irqworkqueue+0x36/0x70 ? douseraddrfault+0x314/0x6c0 ? excpagefault+0x7d/0x190 ? asmexcpagefault+0x2b/0x30 ? f2fssubmitpagewrite+0x6cf/0x780 [f2fs] ? f2fssubmitpagewrite+0x736/0x780 [f2fs] dowritepage+0x50/0x170 [f2fs] f2fsoutplacewritedata+0x61/0xb0 [f2fs] f2fsdowritedatapage+0x3f8/0x660 [f2fs] f2fswritesingledatapage+0x5bb/0x7a0 [f2fs] f2fswritecachepages+0x3da/0xbe0 [f2fs] ... It is possible that other threads have added this fio to io->bio and submitted the io->bio before entering f2fssubmitpagewrite(). At this point io->bio = NULL. If isendzoneblkaddr(sbi, fio->newblkaddr) of this fio is true, then an NULL pointer dereference error occurs at bio_get(io->bio). The original code for determining zone end was after "out:", which would have missed some fio who is zone end. I've moved this code before "skip:" to make sure it's done for each fio.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/4c122a32582b67bdd44ca8d25f894ee2dc54f566
- https://git.kernel.org/stable/c/6d102382a11d5e6035f6c98f6e508a38541f7af3
- https://git.kernel.org/stable/c/8e2ea8b04cb8d976110c4568509e67d6a39b2889
- https://git.kernel.org/stable/c/c2034ef6192a65a986a45c2aa2ed05824fdc0e9f
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede067dc3c6b9c419bac43c6a0be2d85f44681f863Fixed8e2ea8b04cb8d976110c4568509e67d6a39b2889
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede067dc3c6b9c419bac43c6a0be2d85f44681f863Fixed4c122a32582b67bdd44ca8d25f894ee2dc54f566
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede067dc3c6b9c419bac43c6a0be2d85f44681f863Fixed6d102382a11d5e6035f6c98f6e508a38541f7af3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede067dc3c6b9c419bac43c6a0be2d85f44681f863Fixedc2034ef6192a65a986a45c2aa2ed05824fdc0e9f