{"id":"DEBIAN-CVE-2022-50782","details":"In the Linux kernel, the following vulnerability has been resolved:  ext4: fix bug_on in __es_tree_search caused by bad quota inode  We got a issue as fllows: ==================================================================  kernel BUG at fs/ext4/extents_status.c:202!  invalid opcode: 0000 [#1] PREEMPT SMP  CPU: 1 PID: 810 Comm: mount Not tainted 6.1.0-rc1-next-g9631525255e3 #352  RIP: 0010:__es_tree_search.isra.0+0xb8/0xe0  RSP: 0018:ffffc90001227900 EFLAGS: 00010202  RAX: 0000000000000000 RBX: 0000000077512a0f RCX: 0000000000000000  RDX: 0000000000000002 RSI: 0000000000002a10 RDI: ffff8881004cd0c8  RBP: ffff888177512ac8 R08: 47ffffffffffffff R09: 0000000000000001  R10: 0000000000000001 R11: 00000000000679af R12: 0000000000002a10  R13: ffff888177512d88 R14: 0000000077512a10 R15: 0000000000000000  FS: 00007f4bd76dbc40(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: 00005653bf993cf8 CR3: 000000017bfdf000 CR4: 00000000000006e0  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400  Call Trace:   \u003cTASK\u003e   ext4_es_cache_extent+0xe2/0x210   ext4_cache_extents+0xd2/0x110   ext4_find_extent+0x5d5/0x8c0   ext4_ext_map_blocks+0x9c/0x1d30   ext4_map_blocks+0x431/0xa50   ext4_getblk+0x82/0x340   ext4_bread+0x14/0x110   ext4_quota_read+0xf0/0x180   v2_read_header+0x24/0x90   v2_check_quota_file+0x2f/0xa0   dquot_load_quota_sb+0x26c/0x760   dquot_load_quota_inode+0xa5/0x190   ext4_enable_quotas+0x14c/0x300   __ext4_fill_super+0x31cc/0x32c0   ext4_fill_super+0x115/0x2d0   get_tree_bdev+0x1d2/0x360   ext4_get_tree+0x19/0x30   vfs_get_tree+0x26/0xe0   path_mount+0x81d/0xfc0   do_mount+0x8d/0xc0   __x64_sys_mount+0xc0/0x160   do_syscall_64+0x35/0x80   entry_SYSCALL_64_after_hwframe+0x63/0xcd   \u003c/TASK\u003e ==================================================================  Above issue may happen as follows: ------------------------------------- ext4_fill_super  ext4_orphan_cleanup   ext4_enable_quotas    ext4_quota_enable     ext4_iget --\u003e get error inode \u003c5\u003e      ext4_ext_check_inode --\u003e Wrong imode makes it escape inspection      make_bad_inode(inode) --\u003e EXT4_BOOT_LOADER_INO set imode     dquot_load_quota_inode      vfs_setup_quota_inode --\u003e check pass      dquot_load_quota_sb       v2_check_quota_file        v2_read_header         ext4_quota_read          ext4_bread           ext4_getblk            ext4_map_blocks             ext4_ext_map_blocks              ext4_find_extent               ext4_cache_extents                ext4_es_cache_extent                 __es_tree_search.isra.0                  ext4_es_end --\u003e Wrong extents trigger BUG_ON  In the above issue, s_usr_quota_inum is set to 5, but inode\u003c5\u003e contains incorrect imode and disordered extents. Because 5 is EXT4_BOOT_LOADER_INO, the ext4_ext_check_inode check in the ext4_iget function can be bypassed, finally, the extents that are not checked trigger the BUG_ON in the __es_tree_search function. To solve this issue, check whether the inode is bad_inode in vfs_setup_quota_inode().","modified":"2026-09-01T16:05:36.380412731Z","published":"2025-12-24T13:16:05.047Z","upstream":["CVE-2022-50782"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50782"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50782.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50782.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50782.json"}}],"schema_version":"1.9.0"}