================================================================== BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x198/0x1b0 lib/list_debug.c:62 Read of size 8 at addr ffff88801e361048 by task syz-executor.3/6725 CPU: 1 PID: 6725 Comm: syz-executor.3 Not tainted 6.6.0-rc6-next-20231018-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 __list_del_entry_valid_or_report+0x198/0x1b0 lib/list_debug.c:62 __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del include/linux/list.h:229 [inline] ptp_release+0xe3/0x2d0 drivers/ptp/ptp_chardev.c:149 posix_clock_release+0xa4/0x160 kernel/time/posix-clock.c:157 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fcc1207b9da Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007fffa4161680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fcc1207b9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b2e060000 R09: 00007fcc1219bf8c R10: 00007fffa41617d0 R11: 0000000000000293 R12: 00007fcc11c000a8 R13: ffffffffffffffff R14: 00007fcc11c00000 R15: 0000000000022079 Allocated by task 6723: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] ptp_open+0xe3/0x510 drivers/ptp/ptp_chardev.c:112 posix_clock_open+0x17e/0x240 kernel/time/posix-clock.c:134 chrdev_open+0x26d/0x6e0 fs/char_dev.c:414 do_dentry_open+0x8d4/0x18d0 fs/open.c:948 do_open fs/namei.c:3621 [inline] path_openat+0x1d3b/0x2ce0 fs/namei.c:3778 do_filp_open+0x1de/0x430 fs/namei.c:3808 do_sys_openat2+0x176/0x1e0 fs/open.c:1440 do_sys_open fs/open.c:1455 [inline] __do_sys_openat fs/open.c:1471 [inline] __se_sys_openat fs/open.c:1466 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1466 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 6721: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0xc0/0x180 mm/slub.c:3822 ptp_release+0x23c/0x2d0 drivers/ptp/ptp_chardev.c:153 posix_clock_release+0xa4/0x160 kernel/time/posix-clock.c:157 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff88801e360000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 4168 bytes inside of freed 8192-byte region [ffff88801e360000, ffff88801e362000) The buggy address belongs to the physical page: page:ffffea000078d800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e360 head:ffffea000078d800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012c42280 ffffea000070e200 dead000000000004 raw: 0000000000000000 0000000000020002 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 48, tgid 48 (kworker/u4:3), ts 9657783303, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0xa16/0x3680 mm/page_alloc.c:3348 __alloc_pages+0x1d0/0x4c0 mm/page_alloc.c:4604 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133 alloc_slab_page mm/slub.c:1870 [inline] allocate_slab+0x251/0x380 mm/slub.c:2017 new_slab mm/slub.c:2070 [inline] ___slab_alloc+0x8c7/0x1580 mm/slub.c:3223 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322 __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x131/0x310 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node+0x56/0x130 mm/slab_common.c:1014 kmalloc_node include/linux/slab.h:620 [inline] kvmalloc_node+0x6f/0x1a0 mm/util.c:607 kvzalloc_node include/linux/slab.h:742 [inline] sbitmap_init_node+0x1c8/0x680 lib/sbitmap.c:113 scsi_realloc_sdev_budget_map+0x4d4/0x620 drivers/scsi/scsi_scan.c:246 scsi_alloc_sdev+0x9a9/0xd10 drivers/scsi/scsi_scan.c:356 scsi_probe_and_add_lun+0x170d/0x27d0 drivers/scsi/scsi_scan.c:1189 __scsi_scan_target+0x255/0xef0 drivers/scsi/scsi_scan.c:1693 scsi_scan_channel drivers/scsi/scsi_scan.c:1781 [inline] scsi_scan_channel+0x149/0x1e0 drivers/scsi/scsi_scan.c:1757 page_owner free stack trace missing Memory state around the buggy address: ffff88801e360f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801e360f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801e361000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801e361080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801e361100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================