Liu Shixin via Jfs-discussion ef7311101c jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount ... [ Upstream commit 6e2bda2c19 ] syzbot found an invalid-free in diUnmount: BUG: KASAN: double-free in slab_free mm/slub.c:3661 [inline] BUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3674 Free of addr ffff88806f410000 by task syz-executor131/3632 CPU: 0 PID: 3632 Comm: syz-executor131 Not tainted 6.1.0-rc7-syzkaller-00012-gca57f02295f1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:460 ____kasan_slab_free+0xfb/0x120 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3674 diUnmount+0xef/0x100 fs/jfs/jfs_imap.c:195 jfs_umount+0x108/0x370 fs/jfs/jfs_umount.c:63 jfs_put_super+0x86/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_block_super+0x79/0xd0 fs/super.c:1428 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1186 task_work_run+0x243/0x300 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x664/0x2070 kernel/exit.c:820 do_group_exit+0x1fd/0x2b0 kernel/exit.c:950 __do_sys_exit_group kernel/exit.c:961 [inline] __se_sys_exit_group kernel/exit.c:959 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd [...] JFS_IP(ipimap)->i_imap is not setting to NULL after free in diUnmount. If jfs_remount() free JFS_IP(ipimap)->i_imap but then failed at diMount(). JFS_IP(ipimap)->i_imap will be freed once again. Fix this problem by setting JFS_IP(ipimap)->i_imap to NULL after free. Reported-by: syzbot+90a11e6b1e810785c6ff@syzkaller.appspotmail.com Signed-off-by: Liu Shixin <liushixin2@huawei.com> Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-09-23 11:09:58 +02:00
..
acl.c	vfs: add rcu argument to ->get_acl() callback	2021-08-18 22:08:24 +02:00
file.c
inode.c	jfs: prevent NULL deref in diFree	2022-04-13 20:59:13 +02:00
ioctl.c
jfs_acl.h	vfs: add rcu argument to ->get_acl() callback	2021-08-18 22:08:24 +02:00
jfs_btree.h
jfs_debug.c
jfs_debug.h
jfs_dinode.h	jfs: Avoid field-overflowing memcpy()	2021-06-23 09:21:52 -05:00
jfs_discard.c
jfs_discard.h
jfs_dmap.c	fs/jfs: prevent double-free in dbUnmount() after failed jfs_remount()	2023-09-23 11:09:57 +02:00
jfs_dmap.h
jfs_dtree.c
jfs_dtree.h
jfs_extent.c	jfs: validate max amount of blocks before allocation.	2023-09-19 12:22:43 +02:00
jfs_extent.h
jfs_filsys.h	jfs: jfs_dmap: Validate db_l2nbperpage while mounting	2023-07-23 13:47:49 +02:00
jfs_imap.c	jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount	2023-09-23 11:09:58 +02:00
jfs_imap.h
jfs_incore.h	jfs: Avoid field-overflowing memcpy()	2021-06-23 09:21:52 -05:00
jfs_inode.c
jfs_inode.h
jfs_lock.h
jfs_logmgr.c
jfs_logmgr.h
jfs_metapage.c
jfs_metapage.h
jfs_mount.c	JFS: fix memleak in jfs_mount	2021-11-18 19:16:48 +01:00
jfs_superblock.h
jfs_txnmgr.c	FS: JFS: Check for read-only mounted filesystem in txBegin	2023-07-27 08:46:58 +02:00
jfs_txnmgr.h
jfs_types.h
jfs_umount.c
jfs_unicode.c
jfs_unicode.h
jfs_uniupr.c
jfs_xattr.h
jfs_xtree.c
jfs_xtree.h
Kconfig
Makefile
namei.c	FS: JFS: Fix null-ptr-deref Read in txBegin	2023-07-27 08:46:58 +02:00
resize.c
super.c	jfs: Avoid field-overflowing memcpy()	2021-06-23 09:21:52 -05:00
symlink.c
xattr.c