ffff888086eeb6e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff888086eeb6f0: 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+0x72a/0xb80 lib/hexdump.c:193 Read of size 1 at addr ffff888086eeb700 by task syz-executor.1/18428 CPU: 1 PID: 18428 Comm: syz-executor.1 Not tainted 6.0.0-rc7-syzkaller-00239-gb357fd1c2afc #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+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x220 mm/kasan/report.c:433 kasan_report+0xfb/0x130 mm/kasan/report.c:495 hex_dump_to_buffer+0x72a/0xb80 lib/hexdump.c:193 print_hex_dump+0x13e/0x270 lib/hexdump.c:276 ea_get+0xccc/0x1280 fs/jfs/xattr.c:561 __jfs_getxattr+0xd0/0x390 fs/jfs/xattr.c:807 __vfs_getxattr+0x3de/0x410 fs/xattr.c:411 smk_fetch+0xb0/0x140 security/smack/smack_lsm.c:295 smack_d_instantiate+0x5c4/0xa10 security/smack/smack_lsm.c:3410 security_d_instantiate+0xa5/0x100 security/security.c:2056 d_splice_alias+0x6e/0x3b0 fs/dcache.c:3155 jfs_lookup+0x2b9/0x400 fs/jfs/namei.c:1467 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10f8/0x2e00 fs/namei.c:3688 do_filp_open+0x275/0x500 fs/namei.c:3718 do_sys_openat2+0x13b/0x500 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_open fs/open.c:1337 [inline] __se_sys_open fs/open.c:1333 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f983948a5a9 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:00007f983a69e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f98395abf80 RCX: 00007f983948a5a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000340 RBP: 00007f98394e5580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda120f23f R14: 00007f983a69e300 R15: 0000000000022000 Allocated by task 18428: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] __kasan_slab_alloc+0xb2/0xe0 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+0x175/0x2d0 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3103 [inline] jfs_alloc_inode+0x21/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:260 [inline] iget_locked+0x191/0x830 fs/inode.c:1287 jfs_iget+0x20/0x3b0 fs/jfs/inode.c:29 jfs_lookup+0x221/0x400 fs/jfs/namei.c:1462 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10f8/0x2e00 fs/namei.c:3688 do_filp_open+0x275/0x500 fs/namei.c:3718 do_sys_openat2+0x13b/0x500 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_open fs/open.c:1337 [inline] __se_sys_open fs/open.c:1333 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888086eeae40 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of 2240-byte region [ffff888086eeae40, ffff888086eeb700) The buggy address belongs to the physical page: page:ffffea00021bba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x86ee8 head:ffffea00021bba00 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888076582901 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888146246500 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff888076582901 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 18428, tgid 18426 (syz-executor.1), ts 536875284284, free_ts 535515504947 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x42e/0xce0 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] 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+0x225/0x2d0 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3103 [inline] jfs_alloc_inode+0x21/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:260 [inline] new_inode_pseudo+0x61/0x1d0 fs/inode.c:1019 new_inode+0x25/0x1d0 fs/inode.c:1047 jfs_fill_super+0x3fd/0xc50 fs/jfs/super.c:544 mount_bdev+0x26c/0x3a0 fs/super.c:1400 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 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+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x630 mm/page_alloc.c:3476 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 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_trace+0x1de/0x310 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] kobject_uevent_env+0x33a/0x8e0 lib/kobject_uevent.c:524 gadget_unbind_driver+0x89/0x5d0 drivers/usb/gadget/udc/core.c:1532 device_remove drivers/base/dd.c:548 [inline] __device_release_driver drivers/base/dd.c:1249 [inline] device_release_driver_internal+0x511/0x8a0 drivers/base/dd.c:1275 driver_detach+0x204/0x2e0 drivers/base/dd.c:1338 bus_remove_driver+0xf3/0x250 drivers/base/bus.c:677 usb_gadget_unregister_driver+0x4a/0x70 drivers/usb/gadget/udc/core.c:1592 raw_release+0xf1/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:413 __fput+0x3b9/0x820 fs/file_table.c:320 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 Memory state around the buggy address: ffff888086eeb600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888086eeb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888086eeb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888086eeb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888086eeb800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================