================================================================== BUG: KASAN: slab-out-of-bounds in run_unpack+0x8b7/0x970 fs/ntfs3/run.c:944 Read of size 1 at addr ffff88803c559f02 by task syz-executor.0/8474 CPU: 1 PID: 8474 Comm: syz-executor.0 Not tainted 6.0.0-rc3-next-20220901-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495 run_unpack+0x8b7/0x970 fs/ntfs3/run.c:944 run_unpack_ex+0xb0/0x7c0 fs/ntfs3/run.c:1057 ntfs_read_mft fs/ntfs3/inode.c:368 [inline] ntfs_iget5+0xc20/0x3280 fs/ntfs3/inode.c:501 ntfs_loadlog_and_replay+0x124/0x5d0 fs/ntfs3/fsntfs.c:272 ntfs_fill_super+0x1eff/0x37f0 fs/ntfs3/super.c:1018 get_tree_bdev+0x440/0x760 fs/super.c:1323 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f842d28a93a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f842e38cf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f842d28a93a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f842e38cfe0 RBP: 00007f842e38d020 R08: 00007f842e38d020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f842e38cfe0 R15: 000000002007aa80 Allocated by task 3704: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc mm/kasan/common.c:516 [inline] ____kasan_kmalloc mm/kasan/common.c:475 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525 kasan_kmalloc include/linux/kasan.h:234 [inline] __do_kmalloc_node mm/slab_common.c:930 [inline] __kmalloc_node_track_caller+0x55/0xc0 mm/slab_common.c:950 kmalloc_reserve net/core/skbuff.c:358 [inline] __alloc_skb+0xd9/0x2f0 net/core/skbuff.c:430 alloc_skb include/linux/skbuff.h:1258 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:742 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:799 [inline] nsim_dev_trap_report_work+0x2ad/0xc50 drivers/net/netdevsim/dev.c:844 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 3704: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:367 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1651 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1677 slab_free mm/slub.c:3580 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3593 skb_free_head+0xac/0x110 net/core/skbuff.c:658 skb_release_data+0x5f1/0x870 net/core/skbuff.c:687 skb_release_all net/core/skbuff.c:752 [inline] __kfree_skb net/core/skbuff.c:766 [inline] consume_skb net/core/skbuff.c:931 [inline] consume_skb+0xc2/0x160 net/core/skbuff.c:925 nsim_dev_trap_report drivers/net/netdevsim/dev.c:815 [inline] nsim_dev_trap_report_work+0x871/0xc50 drivers/net/netdevsim/dev.c:844 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88803c558000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3842 bytes to the right of 4096-byte region [ffff88803c558000, ffff88803c559000) The buggy address belongs to the physical page: page:ffffea0000f15600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3c558 head:ffffea0000f15600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001e4f400 dead000000000002 ffff888011842140 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3663, tgid 3663 (udevd), ts 499535820134, free_ts 499350285357 prep_new_page mm/page_alloc.c:2534 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4284 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5542 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1721 [inline] allocate_slab+0x228/0x370 mm/slub.c:1866 new_slab mm/slub.c:1919 [inline] ___slab_alloc+0xad0/0x1440 mm/slub.c:3100 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3198 slab_alloc_node mm/slub.c:3283 [inline] __kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3356 __do_kmalloc_node mm/slab_common.c:929 [inline] __kmalloc+0x44/0xc0 mm/slab_common.c:943 kmalloc include/linux/slab.h:564 [inline] tomoyo_realpath_from_path+0xbf/0x600 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x205/0x550 security/tomoyo/file.c:723 tomoyo_path_mknod+0x10d/0x190 security/tomoyo/tomoyo.c:239 security_path_mknod+0xf9/0x170 security/security.c:1150 may_o_create fs/namei.c:3235 [inline] lookup_open.isra.0+0x49f/0x12a0 fs/namei.c:3376 open_last_lookups fs/namei.c:3481 [inline] path_openat+0x996/0x28f0 fs/namei.c:3688 do_filp_open+0x1b6/0x400 fs/namei.c:3718 do_sys_openat2+0x16d/0x4c0 fs/open.c:1308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1451 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1501 free_unref_page_prepare mm/page_alloc.c:3382 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3478 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2514 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3317 [inline] slab_alloc mm/slub.c:3325 [inline] __kmem_cache_alloc_lru mm/slub.c:3332 [inline] kmem_cache_alloc+0x2b7/0x3d0 mm/slub.c:3341 kmem_cache_zalloc include/linux/slab.h:685 [inline] lsm_inode_alloc security/security.c:594 [inline] security_inode_alloc+0x34/0x160 security/security.c:1024 inode_init_always+0xbf6/0xef0 fs/inode.c:230 alloc_inode+0x82/0x230 fs/inode.c:268 new_inode_pseudo fs/inode.c:1020 [inline] new_inode+0x27/0x270 fs/inode.c:1048 __ext4_new_inode+0x34b/0x5690 fs/ext4/ialloc.c:960 ext4_symlink+0x5a8/0xa00 fs/ext4/namei.c:3356 vfs_symlink fs/namei.c:4378 [inline] vfs_symlink+0x365/0x5b0 fs/namei.c:4363 do_symlinkat+0x261/0x2e0 fs/namei.c:4407 __do_sys_symlinkat fs/namei.c:4424 [inline] __se_sys_symlinkat fs/namei.c:4421 [inline] __x64_sys_symlinkat+0x93/0xc0 fs/namei.c:4421 Memory state around the buggy address: ffff88803c559e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803c559e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88803c559f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88803c559f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803c55a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================