Hello, syzbot found the following issue on: HEAD commit: cb71b93c2dc3 Add linux-next specific files for 20220628 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=13621152080000 kernel config: https://syzkaller.appspot.com/x/.config?x=badbc1adb2d582eb dashboard link: https://syzkaller.appspot.com/bug?extid=8b481578352d4637f510 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150c25fc080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13089562080000 The issue was bisected to: commit bec0918551a79c3c6b63a493a80e35e8b402804f Author: Roman Gushchin <roman.gushchin@xxxxxxxxx> Date: Wed Jun 1 03:22:24 2022 +0000 mm: shrinkers: provide shrinkers with names bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17451fd0080000 final oops: https://syzkaller.appspot.com/x/report.txt?x=14c51fd0080000 console output: https://syzkaller.appspot.com/x/log.txt?x=10c51fd0080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8b481578352d4637f510@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: bec0918551a7 ("mm: shrinkers: provide shrinkers with names") ================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3534 [inline] BUG: KASAN: double-free in kfree+0xe2/0x4d0 mm/slub.c:4562 CPU: 0 PID: 3647 Comm: syz-executor232 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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_invalid_free+0x8f/0x1a0 mm/kasan/report.c:462 ____kasan_slab_free+0x18b/0x1c0 mm/kasan/common.c:355 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780 slab_free mm/slub.c:3534 [inline] kfree+0xe2/0x4d0 mm/slub.c:4562 kfree_const+0x51/0x60 mm/util.c:41 free_prealloced_shrinker+0x32/0x160 mm/vmscan.c:658 destroy_unused_super.part.0+0x106/0x170 fs/super.c:185 destroy_unused_super fs/super.c:278 [inline] alloc_super+0x8bd/0xaa0 fs/super.c:277 sget_fc+0x13e/0x7c0 fs/super.c:530 vfs_get_super fs/super.c:1134 [inline] get_tree_nodev+0x24/0x1d0 fs/super.c:1169 vfs_get_tree+0x89/0x2f0 fs/super.c:1501 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1320/0x1fa0 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+0x46/0xb0 RIP: 0033:0x7f84280f4ef9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc55338338 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f84280f4ef9 RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00007ffc55338360 R08: 0000000000000000 R09: 00007ffc55338370 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffc55338380 R14: 00007ffc553383c0 R15: 0000000000000006 </TASK> Allocated by task 143: 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:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] rh_call_control drivers/usb/core/hcd.c:514 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:848 [inline] usb_hcd_submit_urb+0x661/0x2220 drivers/usb/core/hcd.c:1551 usb_submit_urb+0x86d/0x1880 drivers/usb/core/urb.c:594 usb_start_wait_urb+0x101/0x4b0 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 get_port_status drivers/usb/core/hub.c:580 [inline] hub_ext_port_status+0x112/0x450 drivers/usb/core/hub.c:597 usb_hub_port_status drivers/usb/core/hub.c:619 [inline] hub_activate+0xa5c/0x1c90 drivers/usb/core/hub.c:1129 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Freed by task 3647: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780 slab_free mm/slub.c:3534 [inline] kfree+0xe2/0x4d0 mm/slub.c:4562 kfree_const+0x51/0x60 mm/util.c:41 prealloc_shrinker+0x179/0x1b0 mm/vmscan.c:644 alloc_super+0x831/0xaa0 fs/super.c:268 sget_fc+0x13e/0x7c0 fs/super.c:530 vfs_get_super fs/super.c:1134 [inline] get_tree_nodev+0x24/0x1d0 fs/super.c:1169 vfs_get_tree+0x89/0x2f0 fs/super.c:1501 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1320/0x1fa0 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+0x46/0xb0 The buggy address belongs to the object at ffff888147889b20 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff888147889b20, ffff888147889b30) The buggy address belongs to the physical page: page:ffffea00051e2240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147889 flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000000200 ffffea00051e2ac0 dead000000000002 ffff8880118413c0 raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 8392902276, free_ts 0 prep_new_page mm/page_alloc.c:2535 [inline] get_page_from_freelist+0x210d/0x3a30 mm/page_alloc.c:4282 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5506 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2113 alloc_pages+0x2b1/0x310 mm/mempolicy.c:2275 alloc_slab_page mm/slub.c:1824 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1969 new_slab mm/slub.c:2029 [inline] ___slab_alloc+0x89d/0xef0 mm/slub.c:3031 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118 slab_alloc_node mm/slub.c:3209 [inline] slab_alloc mm/slub.c:3251 [inline] __kmalloc_track_caller+0x382/0x430 mm/slub.c:4924 kstrdup+0x36/0x70 mm/util.c:61 kstrdup_const+0x53/0x80 mm/util.c:84 __kernfs_new_node+0x9d/0x8b0 fs/kernfs/dir.c:589 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:655 kernfs_create_link+0xcb/0x230 fs/kernfs/symlink.c:39 sysfs_do_create_link_sd+0x90/0x140 fs/sysfs/symlink.c:44 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline] sysfs_create_link+0x5f/0xc0 fs/sysfs/symlink.c:92 driver_sysfs_add+0xf7/0x350 drivers/base/dd.c:412 page_owner free stack trace missing Memory state around the buggy address: ffff888147889a00: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc ffff888147889a80: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc >ffff888147889b00: fb fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ^ ffff888147889b80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff888147889c00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
