================================================================== BUG: KASAN: use-after-free in hfsplus_release_folio+0x554/0x5f0 fs/hfsplus/inode.c:92 Read of size 4 at addr ffff8880759bc038 by task syz-executor.1/5120 CPU: 0 PID: 5120 Comm: syz-executor.1 Not tainted 6.2.0-rc4-next-20230118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xc0/0xf0 mm/kasan/report.c:517 hfsplus_release_folio+0x554/0x5f0 fs/hfsplus/inode.c:92 filemap_release_folio+0x13f/0x1b0 mm/filemap.c:3965 block_invalidate_folio+0x4dc/0x5e0 fs/buffer.c:1568 folio_invalidate mm/truncate.c:159 [inline] truncate_cleanup_folio+0x31a/0x3f0 mm/truncate.c:179 truncate_inode_pages_range+0x238/0xec0 mm/truncate.c:368 hfsplus_evict_inode+0x1a/0xe0 fs/hfsplus/super.c:168 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput fs/inode.c:1774 [inline] iput+0x52b/0x8e0 fs/inode.c:1760 hfsplus_put_super+0x274/0x3f0 fs/hfsplus/super.c:302 generic_shutdown_super+0x158/0x410 fs/super.c:492 kill_block_super+0x9b/0xf0 fs/super.c:1386 deactivate_locked_super+0x98/0x160 fs/super.c:332 deactivate_super+0xb1/0xd0 fs/super.c:363 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5fd1c8d537 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffc9691f9e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5fd1c8d537 RDX: 00007ffc9691fabc RSI: 000000000000000a RDI: 00007ffc9691fab0 RBP: 00007ffc9691fab0 R08: 00000000ffffffff R09: 00007ffc9691f880 R10: 00005555568698b3 R11: 0000000000000246 R12: 00007f5fd1ce6b24 R13: 00007ffc96920b70 R14: 0000555556869810 R15: 00007ffc96920bb0 Allocated by task 4657: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] hfsplus_btree_open+0x52/0xcd0 fs/hfsplus/btree.c:142 hfsplus_fill_super+0xae5/0x1a30 fs/hfsplus/super.c:473 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5120: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 hfsplus_btree_close+0x1e5/0x380 fs/hfsplus/btree.c:280 hfsplus_put_super+0x224/0x3f0 fs/hfsplus/super.c:300 generic_shutdown_super+0x158/0x410 fs/super.c:492 kill_block_super+0x9b/0xf0 fs/super.c:1386 deactivate_locked_super+0x98/0x160 fs/super.c:332 deactivate_super+0xb1/0xd0 fs/super.c:363 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880759bc000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 56 bytes inside of 4096-byte region [ffff8880759bc000, ffff8880759bd000) The buggy address belongs to the physical page: page:ffffea0001d66e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x759b8 head:ffffea0001d66e00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 ffffea0002190400 dead000000000002 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 27231, tgid 27231 (kworker/0:18), ts 1378123539094, free_ts 1368996929377 prep_new_page mm/page_alloc.c:2549 [inline] get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4325 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5591 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2281 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x330 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:987 kmalloc_reserve net/core/skbuff.c:490 [inline] __alloc_skb+0xe9/0x310 net/core/skbuff.c:563 alloc_skb include/linux/skbuff.h:1270 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x2b1/0xc80 drivers/net/netdevsim/dev.c:853 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 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+0x4d0/0x910 mm/page_alloc.c:1501 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3482 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x175/0x320 mm/slub.c:3476 getname_flags.part.0+0x50/0x4f0 fs/namei.c:140 getname_flags+0x9e/0xe0 include/linux/audit.h:320 vfs_fstatat+0x77/0xb0 fs/stat.c:275 __do_sys_newfstatat+0x8a/0x110 fs/stat.c:446 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880759bbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880759bbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880759bc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880759bc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880759bc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================