Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:[EOL][EOL]jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount[EOL][EOL]syzbot found an invalid-free in diUnmount:[EOL][EOL]BUG: KASAN: double-free in slab_free mm/slub.c:3661 [inline][EOL]BUG: KASAN: double-free in __kmem_cache_free+0x71/0x110 mm/slub.c:3674[EOL]Free of addr ffff88806f410000 by task syz-executor131/3632[EOL][EOL] CPU: 0 PID: 3632 Comm: syz-executor131 Not tainted 6.1.0-rc7-syzkaller-00012-gca57f02295f1 #0[EOL] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022[EOL] Call Trace:[EOL]  <TASK>[EOL]  __dump_stack lib/dump_stack.c:88 [inline][EOL]  dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106[EOL]  print_address_description+0x74/0x340 mm/kasan/report.c:284[EOL]  print_report+0x107/0x1f0 mm/kasan/report.c:395[EOL]  kasan_report_invalid_free+0xac/0xd0 mm/kasan/report.c:460[EOL]  ____kasan_slab_free+0xfb/0x120[EOL]  kasan_slab_free include/linux/kasan.h:177 [inline][EOL]  slab_free_hook mm/slub.c:1724 [inline][EOL]  slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750[EOL]  slab_free mm/slub.c:3661 [inline][EOL]  __kmem_cache_free+0x71/0x110 mm/slub.c:3674[EOL]  diUnmount+0xef/0x100 fs/jfs/jfs_imap.c:195[EOL]  jfs_umount+0x108/0x370 fs/jfs/jfs_umount.c:63[EOL]  jfs_put_super+0x86/0x190 fs/jfs/super.c:194[EOL]  generic_shutdown_super+0x130/0x310 fs/super.c:492[EOL]  kill_block_super+0x79/0xd0 fs/super.c:1428[EOL]  deactivate_locked_super+0xa7/0xf0 fs/super.c:332[EOL]  cleanup_mnt+0x494/0x520 fs/namespace.c:1186[EOL]  task_work_run+0x243/0x300 kernel/task_work.c:179[EOL]  exit_task_work include/linux/task_work.h:38 [inline][EOL]  do_exit+0x664/0x2070 kernel/exit.c:820[EOL]  do_group_exit+0x1fd/0x2b0 kernel/exit.c:950[EOL]  __do_sys_exit_group kernel/exit.c:961 [inline][EOL]  __se_sys_exit_group kernel/exit.c:959 [inline][EOL]  __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959[EOL]  do_syscall_x64 arch/x86/entry/common.c:50 [inline][EOL]  do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80[EOL]  entry_SYSCALL_64_after_hwframe+0x63/0xcd[EOL][...][EOL][EOL]JFS_IP(ipimap)->i_imap is not setting to NULL after free in diUnmount.[EOL]If jfs_remount() free JFS_IP(ipimap)->i_imap but then failed at diMount().[EOL]JFS_IP(ipimap)->i_imap will be freed once again.[EOL]Fix this problem by setting JFS_IP(ipimap)->i_imap to NULL after free.