Hello, syzbot found the following issue on: HEAD commit: e47eb90a0a9a Add linux-next specific files for 20220901 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=138d5455080000 kernel config: https://syzkaller.appspot.com/x/.config?x=7933882276523081 dashboard link: https://syzkaller.appspot.com/bug?extid=938055fcae46a26e5239 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+938055fcae46a26e5239@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-out-of-bounds in get_node_id fs/fuse/fuse_i.h:887 [inline] BUG: KASAN: slab-out-of-bounds in fuse_inode_eq+0x75/0x80 fs/fuse/inode.c:341 Read of size 8 at addr ffff888051c95930 by task syz-executor.3/10946 CPU: 0 PID: 10946 Comm: syz-executor.3 Not tainted 6.0.0-rc3-next-20220901-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: <TASK> __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 get_node_id fs/fuse/fuse_i.h:887 [inline] fuse_inode_eq+0x75/0x80 fs/fuse/inode.c:341 find_inode+0xe4/0x220 fs/inode.c:917 ilookup5_nowait fs/inode.c:1430 [inline] ilookup5 fs/inode.c:1459 [inline] iget5_locked+0xb1/0x2c0 fs/inode.c:1240 fuse_iget+0x1cc/0x6b0 fs/fuse/inode.c:382 fuse_lookup_name+0x447/0x630 fs/fuse/dir.c:403 fuse_lookup.part.0+0xdf/0x390 fs/fuse/dir.c:433 fuse_lookup fs/fuse/dir.c:429 [inline] fuse_atomic_open+0x2d5/0x440 fs/fuse/dir.c:662 atomic_open fs/namei.c:3276 [inline] lookup_open.isra.0+0xb8a/0x12a0 fs/namei.c:3384 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 do_sys_open fs/open.c:1324 [inline] __do_sys_openat fs/open.c:1340 [inline] __se_sys_openat fs/open.c:1335 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1335 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: 0033:0x7f1c79689279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f1c78dff168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f1c7979c050 RCX: 00007f1c79689279 RDX: 0000000000000000 RSI: 00000000200020c0 RDI: ffffffffffffff9c RBP: 00007f1c796e32e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc999facef R14: 00007f1c78dff300 R15: 0000000000022000 </TASK> Allocated by task 29165: 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_slab_alloc+0x90/0xc0 mm/kasan/common.c:470 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_lru+0x255/0x730 mm/slub.c:3348 alloc_inode_sb include/linux/fs.h:3104 [inline] nilfs_alloc_inode+0x24/0x150 fs/nilfs2/super.c:154 alloc_inode+0x61/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1243 [inline] iget5_locked+0x1cb/0x2c0 fs/inode.c:1236 nilfs_iget_locked+0xa0/0xd0 fs/nilfs2/inode.c:588 nilfs_ifile_read+0x2c/0x1a0 fs/nilfs2/ifile.c:187 nilfs_attach_checkpoint+0x258/0x4b0 fs/nilfs2/super.c:541 nilfs_fill_super fs/nilfs2/super.c:1064 [inline] nilfs_mount+0xb12/0xfb0 fs/nilfs2/super.c:1317 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 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 The buggy address belongs to the object at ffff888051c95348 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 0 bytes to the right of 1512-byte region [ffff888051c95348, ffff888051c95930) The buggy address belongs to the physical page: page:ffffea0001472400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888051c90000 pfn:0x51c90 head:ffffea0001472400 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888078d1b801 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888146e09dc0 raw: ffff888051c90000 000000008013000c 00000001ffffffff ffff888078d1b801 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 29150, tgid 29149 (syz-executor.3), ts 1182464121975, free_ts 1152885638731 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] slab_alloc mm/slub.c:3325 [inline] __kmem_cache_alloc_lru mm/slub.c:3332 [inline] kmem_cache_alloc_lru+0x4aa/0x730 mm/slub.c:3348 alloc_inode_sb include/linux/fs.h:3104 [inline] nilfs_alloc_inode+0x24/0x150 fs/nilfs2/super.c:154 alloc_inode+0x61/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1243 [inline] iget5_locked+0x1cb/0x2c0 fs/inode.c:1236 nilfs_iget_locked+0xa0/0xd0 fs/nilfs2/inode.c:588 nilfs_dat_read+0x84/0x360 fs/nilfs2/dat.c:483 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline] load_nilfs+0x368/0x1330 fs/nilfs2/the_nilfs.c:269 nilfs_fill_super fs/nilfs2/super.c:1059 [inline] nilfs_mount+0xa9a/0xfb0 fs/nilfs2/super.c:1317 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 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 vm_area_alloc+0x1c/0xf0 kernel/fork.c:458 mmap_region+0x448/0x1bf0 mm/mmap.c:2604 do_mmap+0x825/0xf50 mm/mmap.c:1411 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520 ksys_mmap_pgoff+0x79/0x5a0 mm/mmap.c:1457 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 Memory state around the buggy address: ffff888051c95800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888051c95880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888051c95900: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff888051c95980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888051c95a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. 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