ffff8880836e8870: 68 88 6e 83 80 88 ff ff 00 00 00 00 00 00 00 00 h.n............. ffff8880836e8880: 80 88 6e 83 80 88 ff ff 80 88 6e 83 80 88 ff ff ..n.......n..... ffff8880836e8890: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ ffff8880836e88a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff8880836e88b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ================================================================== BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0xdc1/0xdf0 lib/hexdump.c:193 Read of size 1 at addr ffff8880836e88c0 by task syz-executor.1/11373 CPU: 0 PID: 11373 Comm: syz-executor.1 Not tainted 6.0.0-syzkaller-00372-ga5088ee7251e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 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 hex_dump_to_buffer+0xdc1/0xdf0 lib/hexdump.c:193 print_hex_dump+0x12f/0x1d0 lib/hexdump.c:276 ea_get.cold+0xaa/0x190 fs/jfs/xattr.c:561 __jfs_setxattr+0xdb/0xfc0 fs/jfs/xattr.c:671 __jfs_xattr_set+0xc9/0x150 fs/jfs/xattr.c:917 __vfs_setxattr+0x115/0x180 fs/xattr.c:182 __vfs_setxattr_noperm+0x125/0x5f0 fs/xattr.c:216 __vfs_setxattr_locked+0x1cf/0x260 fs/xattr.c:277 vfs_setxattr+0x11e/0x3c0 fs/xattr.c:313 setxattr+0x146/0x160 fs/xattr.c:623 path_setxattr+0x197/0x1c0 fs/xattr.c:642 __do_sys_lsetxattr fs/xattr.c:665 [inline] __se_sys_lsetxattr fs/xattr.c:661 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:661 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: 0033:0x7faaa468a5a9 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:00007faaa57e8168 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007faaa47ac120 RCX: 00007faaa468a5a9 RDX: 0000000020005380 RSI: 0000000020000080 RDI: 0000000020000040 RBP: 00007faaa46e5580 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe77a09a4f R14: 00007faaa57e8300 R15: 0000000000022000 Allocated by task 11373: 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:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc_lru+0x255/0x720 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3103 [inline] jfs_alloc_inode+0x23/0x60 fs/jfs/super.c:105 alloc_inode+0x61/0x230 fs/inode.c:260 iget_locked+0x1b7/0x6f0 fs/inode.c:1287 jfs_iget+0x1a/0x4d0 fs/jfs/inode.c:29 jfs_lookup+0x246/0x2f0 fs/jfs/namei.c:1462 __lookup_slow+0x24c/0x460 fs/namei.c:1685 lookup_slow fs/namei.c:1702 [inline] walk_component+0x33f/0x5a0 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2474 filename_lookup+0x1ce/0x590 fs/namei.c:2503 user_path_at_empty+0x42/0x60 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0x92/0x1c0 fs/xattr.c:637 __do_sys_lsetxattr fs/xattr.c:665 [inline] __se_sys_lsetxattr fs/xattr.c:661 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:661 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 ffff8880836e8000 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of 2240-byte region [ffff8880836e8000, ffff8880836e88c0) The buggy address belongs to the physical page: page:ffffea00020dba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x836e8 head:ffffea00020dba00 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff88805f96c801 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88814651cc80 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff88805f96c801 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 11373, tgid 11338 (syz-executor.1), ts 409717173737, free_ts 407691693557 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:1829 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x7f1/0xe10 mm/slub.c:3036 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123 slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc_lru+0x528/0x720 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3103 [inline] jfs_alloc_inode+0x23/0x60 fs/jfs/super.c:105 alloc_inode+0x61/0x230 fs/inode.c:260 iget_locked+0x1b7/0x6f0 fs/inode.c:1287 jfs_iget+0x1a/0x4d0 fs/jfs/inode.c:29 jfs_lookup+0x246/0x2f0 fs/jfs/namei.c:1462 __lookup_slow+0x24c/0x460 fs/namei.c:1685 lookup_slow fs/namei.c:1702 [inline] walk_component+0x33f/0x5a0 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2474 filename_lookup+0x1ce/0x590 fs/namei.c:2503 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 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:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc+0x267/0x3b0 mm/slub.c:3273 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9a/0xe0 include/linux/audit.h:320 user_path_at_empty+0x2b/0x60 fs/namei.c:2875 user_path_at include/linux/namei.h:57 [inline] inotify_find_inode+0x32/0x170 fs/notify/inotify/inotify_user.c:378 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:777 [inline] __se_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:730 [inline] __x64_sys_inotify_add_watch+0x1f1/0x350 fs/notify/inotify/inotify_user.c:730 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: ffff8880836e8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880836e8800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880836e8880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8880836e8900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880836e8980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================