wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:3294 Read of size 8 at addr ffff88809c3cdd68 by task loop0/10619 CPU: 1 PID: 10619 Comm: loop0 Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:354 kasan_report syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:433 __lock_acquire+0x2cb4/0x3ff0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:3294 lock_acquire+0x170/0x3c0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:3907 __raw_spin_lock_irqsave syzkaller/managers/linux-4-19/kernel/./include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 syzkaller/managers/linux-4-19/kernel/kernel/locking/spinlock.c:152 __wake_up_common_lock+0xb0/0x170 syzkaller/managers/linux-4-19/kernel/kernel/sched/wait.c:120 lbmIODone+0x44b/0xf40 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:2307 bio_endio+0x471/0x810 syzkaller/managers/linux-4-19/kernel/block/bio.c:1780 req_bio_endio syzkaller/managers/linux-4-19/kernel/block/blk-core.c:278 [inline] blk_update_request+0x30f/0xaf0 syzkaller/managers/linux-4-19/kernel/block/blk-core.c:3111 blk_mq_end_request+0x4a/0x340 syzkaller/managers/linux-4-19/kernel/block/blk-mq.c:544 lo_complete_rq+0x201/0x2d0 syzkaller/managers/linux-4-19/kernel/drivers/block/loop.c:487 __blk_mq_complete_request syzkaller/managers/linux-4-19/kernel/block/blk-mq.c:583 [inline] blk_mq_complete_request+0x472/0x660 syzkaller/managers/linux-4-19/kernel/block/blk-mq.c:620 loop_handle_cmd syzkaller/managers/linux-4-19/kernel/drivers/block/loop.c:1931 [inline] loop_queue_work+0x274/0x20c0 syzkaller/managers/linux-4-19/kernel/drivers/block/loop.c:1940 kthread_worker_fn+0x292/0x730 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:675 kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415 Allocated by task 10611: kmem_cache_alloc_trace+0x12f/0x380 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3625 kmalloc syzkaller/managers/linux-4-19/kernel/./include/linux/slab.h:515 [inline] lbmLogInit syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1842 [inline] lmLogInit+0x301/0x13d0 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1292 open_inline_log syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1197 [inline] lmLogOpen+0x718/0x11e0 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1090 jfs_mount_rw+0x286/0x4b0 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_mount.c:271 jfs_fill_super+0x814/0xb50 syzkaller/managers/linux-4-19/kernel/fs/jfs/super.c:598 mount_bdev+0x2fc/0x3b0 syzkaller/managers/linux-4-19/kernel/fs/super.c:1158 mount_fs+0xa3/0x310 syzkaller/managers/linux-4-19/kernel/fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:961 vfs_kern_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:951 [inline] do_new_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2799 ksys_mount+0xcf/0x130 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3015 __do_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3029 [inline] __se_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10611: __cache_free syzkaller/managers/linux-4-19/kernel/mm/slab.c:3503 [inline] kfree+0xcc/0x210 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3822 lbmLogShutdown syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1885 [inline] lmLogInit+0xf85/0x13d0 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1437 open_inline_log syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1197 [inline] lmLogOpen+0x718/0x11e0 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_logmgr.c:1090 jfs_mount_rw+0x286/0x4b0 syzkaller/managers/linux-4-19/kernel/fs/jfs/jfs_mount.c:271 jfs_fill_super+0x814/0xb50 syzkaller/managers/linux-4-19/kernel/fs/jfs/super.c:598 mount_bdev+0x2fc/0x3b0 syzkaller/managers/linux-4-19/kernel/fs/super.c:1158 mount_fs+0xa3/0x310 syzkaller/managers/linux-4-19/kernel/fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:961 vfs_kern_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:951 [inline] do_new_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2799 ksys_mount+0xcf/0x130 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3015 __do_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3029 [inline] __se_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88809c3cdd00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 104 bytes inside of 192-byte region [ffff88809c3cdd00, ffff88809c3cddc0) The buggy address belongs to the page: page:ffffea000270f340 count:1 mapcount:0 mapping:ffff88813bff0040 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea000272eec8 ffffea00026f8a88 ffff88813bff0040 raw: 0000000000000000 ffff88809c3cd000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809c3cdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809c3cdc80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88809c3cdd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88809c3cdd80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88809c3cde00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================