Ubuntu: (Multiple Advisories) (CVE-2024-26871): Linux kernel vulnerabilities
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix NULL pointer dereference in f2fs_submit_page_write() BUG: kernel NULL pointer dereference, address: 0000000000000014 RIP: 0010:f2fs_submit_page_write+0x6cf/0x780 [f2fs] Call Trace: <TASK> ? show_regs+0x6e/0x80 ? __die+0x29/0x70 ? page_fault_oops+0x154/0x4a0 ? prb_read_valid+0x20/0x30 ? __irq_work_queue_local+0x39/0xd0 ? irq_work_queue+0x36/0x70 ? do_user_addr_fault+0x314/0x6c0 ? exc_page_fault+0x7d/0x190 ? asm_exc_page_fault+0x2b/0x30 ? f2fs_submit_page_write+0x6cf/0x780 [f2fs] ? f2fs_submit_page_write+0x736/0x780 [f2fs] do_write_page+0x50/0x170 [f2fs] f2fs_outplace_write_data+0x61/0xb0 [f2fs] f2fs_do_write_data_page+0x3f8/0x660 [f2fs] f2fs_write_single_data_page+0x5bb/0x7a0 [f2fs] f2fs_write_cache_pages+0x3da/0xbe0 [f2fs] ... It is possible that other threads have added this fio to io->bio and submitted the io->bio before entering f2fs_submit_page_write(). At this point io->bio = NULL. If is_end_zone_blkaddr(sbi, fio->new_blkaddr) 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.
Solution(s)
- ubuntu-upgrade-linux-image-6-8-0-1004-gke
- ubuntu-upgrade-linux-image-6-8-0-1005-raspi
- ubuntu-upgrade-linux-image-6-8-0-1006-ibm
- ubuntu-upgrade-linux-image-6-8-0-1006-oem
- ubuntu-upgrade-linux-image-6-8-0-1006-oracle
- ubuntu-upgrade-linux-image-6-8-0-1006-oracle-64k
- ubuntu-upgrade-linux-image-6-8-0-1008-azure
- ubuntu-upgrade-linux-image-6-8-0-1008-azure-fde
- ubuntu-upgrade-linux-image-6-8-0-1008-gcp
- ubuntu-upgrade-linux-image-6-8-0-1009-aws
- ubuntu-upgrade-linux-image-6-8-0-35-generic
- ubuntu-upgrade-linux-image-6-8-0-35-generic-64k
- ubuntu-upgrade-linux-image-6-8-0-35-lowlatency
- ubuntu-upgrade-linux-image-6-8-0-35-lowlatency-64k
- ubuntu-upgrade-linux-image-aws
- ubuntu-upgrade-linux-image-azure
- ubuntu-upgrade-linux-image-azure-fde
- ubuntu-upgrade-linux-image-gcp
- ubuntu-upgrade-linux-image-generic
- ubuntu-upgrade-linux-image-generic-64k
- ubuntu-upgrade-linux-image-generic-64k-hwe-24-04
- ubuntu-upgrade-linux-image-generic-hwe-24-04
- ubuntu-upgrade-linux-image-generic-lpae
- ubuntu-upgrade-linux-image-gke
- ubuntu-upgrade-linux-image-ibm
- ubuntu-upgrade-linux-image-ibm-classic
- ubuntu-upgrade-linux-image-ibm-lts-24-04
- ubuntu-upgrade-linux-image-kvm
- ubuntu-upgrade-linux-image-lowlatency
- ubuntu-upgrade-linux-image-lowlatency-64k
- ubuntu-upgrade-linux-image-oem-24-04
- ubuntu-upgrade-linux-image-oem-24-04a
- ubuntu-upgrade-linux-image-oracle
- ubuntu-upgrade-linux-image-oracle-64k
- ubuntu-upgrade-linux-image-raspi
- ubuntu-upgrade-linux-image-virtual
- ubuntu-upgrade-linux-image-virtual-hwe-24-04
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