Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on destination blkaddr during recovery As Wenqing Liu reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216456 loop5: detected capacity change from 0 to 131072 F2FS-fs (loop5): recover_inode: ino = 6, name = hln, inline = 1 F2FS-fs (loop5): recover_data: ino = 6 (i_size: recover) err = 0 F2FS-fs (loop5): recover_inode: ino = 6, name = hln, inline = 1 F2FS-fs (loop5): recover_data: ino = 6 (i_size: recover) err = 0 F2FS-fs (loop5): recover_inode: ino = 6, name = hln, inline = 1 F2FS-fs (loop5): recover_data: ino = 6 (i_size: recover) err = 0 F2FS-fs (loop5): Bitmap was wrongly set, blk:5634 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1013 at fs/f2fs/segment.c:2198 RIP: 0010:update_sit_entry+0xa55/0x10b0 [f2fs] Call Trace: <TASK> f2fs_do_replace_block+0xa98/0x1890 [f2fs] f2fs_replace_block+0xeb/0x180 [f2fs] recover_data+0x1a69/0x6ae0 [f2fs] f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs] f2fs_fill_super+0x4665/0x61e0 [f2fs] mount_bdev+0x2cf/0x3b0 legacy_get_tree+0xed/0x1d0 vfs_get_tree+0x81/0x2b0 path_mount+0x47e/0x19d0 do_mount+0xce/0xf0 __x64_sys_mount+0x12c/0x1a0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd If we enable CONFIG_F2FS_CHECK_FS config, it will trigger a kernel panic instead of warning. The root cause is: in fuzzed image, SIT table is inconsistent with inode mapping table, result in triggering such warning during SIT table update. This patch introduces a new flag DATA_GENERIC_ENHANCE_UPDATE, w/ this flag, data block recovery flow can check destination blkaddr's validation in SIT table, and skip f2fs_replace_block() to avoid inconsistent status.
Product status
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 (git) before 68b1e607559d3dc85f94b0d738d7c4e8029b0cfa
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 (git) before 73fb4bd2c055a393816f078f158cdd3025006f1d
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 (git) before ed854f10e6afd5cbd5c3274d4c4df4bfe0ab4362
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 (git) before 8f0a47def4722c5fd8d6b9268b5ffed8a249e2db
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 (git) before 3a4d24d746866dd45d970bd565ff3886e839366a
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 (git) before 0ef4ca04a3f9223ff8bc440041c524b2123e09a3
3.8
Any version before 3.8
5.4.220 (semver)
5.10.150 (semver)
5.15.75 (semver)
5.19.17 (semver)
6.0.3 (semver)
6.1 (original_commit_for_fix)
References
git.kernel.org/...c/68b1e607559d3dc85f94b0d738d7c4e8029b0cfa
git.kernel.org/...c/73fb4bd2c055a393816f078f158cdd3025006f1d
git.kernel.org/...c/ed854f10e6afd5cbd5c3274d4c4df4bfe0ab4362
git.kernel.org/...c/8f0a47def4722c5fd8d6b9268b5ffed8a249e2db
git.kernel.org/...c/3a4d24d746866dd45d970bd565ff3886e839366a
git.kernel.org/...c/0ef4ca04a3f9223ff8bc440041c524b2123e09a3
