8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 ===================================== WARNING: bad unlock balance detected! 4.19.0-rc8+ #197 Not tainted ------------------------------------- syz-executor4/7206 is trying to release lock (&file->mut) at: [] ucma_destroy_id+0x2cb/0x550 drivers/infiniband/core/ucma.c:628 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor4/7206: #0: 000000006df71a31 (&file->mut){+.+.}, at: ucma_destroy_id+0x26b/0x550 drivers/infiniband/core/ucma.c:626 stack backtrace: CPU: 0 PID: 7206 Comm: syz-executor4 Not tainted 4.19.0-rc8+ #197 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b6 lib/dump_stack.c:113 print_unlock_imbalance_bug.cold.48+0xcc/0xd8 kernel/locking/lockdep.c:3464 __lock_release kernel/locking/lockdep.c:3671 [inline] lock_release+0x785/0x970 kernel/locking/lockdep.c:3919 __mutex_unlock_slowpath+0x102/0x8c0 kernel/locking/mutex.c:1197 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713 kobject: 'loop0' (000000005f5aee05): kobject_uevent_env ucma_destroy_id+0x2cb/0x550 drivers/infiniband/core/ucma.c:628 kobject: 'loop0' (000000005f5aee05): fill_kobj_path: path = '/devices/virtual/block/loop0' ucma_write+0x365/0x460 drivers/infiniband/core/ucma.c:1689 __vfs_write+0x119/0x9f0 fs/read_write.c:485 kobject: 'loop1' (00000000aa3a0686): kobject_uevent_env vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 kobject: 'loop1' (00000000aa3a0686): fill_kobj_path: path = '/devices/virtual/block/loop1' __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __ia32_sys_write+0x71/0xb0 fs/read_write.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 kobject: 'loop3' (000000005959ac3c): kobject_uevent_env kobject: 'loop3' (000000005959ac3c): fill_kobj_path: path = '/devices/virtual/block/loop3' entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f6bca9 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7f250cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000280 RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000000 kobject: 'loop5' (0000000017644e80): kobject_uevent_env RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 kobject: 'loop5' (0000000017644e80): fill_kobj_path: path = '/devices/virtual/block/loop5' R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ================================================================== kobject: 'loop2' (00000000e6d170d3): kobject_uevent_env BUG: KASAN: use-after-free in atomic64_read include/asm-generic/atomic-instrumented.h:27 [inline] BUG: KASAN: use-after-free in atomic_long_read include/asm-generic/atomic-long.h:47 [inline] BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0x10f/0x8c0 kernel/locking/mutex.c:1206 kobject: 'loop2' (00000000e6d170d3): fill_kobj_path: path = '/devices/virtual/block/loop2' Read of size 8 at addr ffff8801cd0c0000 by task syz-executor4/7206 CPU: 0 PID: 7206 Comm: syz-executor4 Not tainted 4.19.0-rc8+ #197 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b6 lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 kobject: 'loop0' (000000005f5aee05): kobject_uevent_env check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272 atomic64_read include/asm-generic/atomic-instrumented.h:27 [inline] atomic_long_read include/asm-generic/atomic-long.h:47 [inline] __mutex_unlock_slowpath+0x10f/0x8c0 kernel/locking/mutex.c:1206 kobject: 'loop0' (000000005f5aee05): fill_kobj_path: path = '/devices/virtual/block/loop0' mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713 ucma_destroy_id+0x2cb/0x550 drivers/infiniband/core/ucma.c:628 ucma_write+0x365/0x460 drivers/infiniband/core/ucma.c:1689 __vfs_write+0x119/0x9f0 fs/read_write.c:485 kobject: 'loop1' (00000000aa3a0686): kobject_uevent_env vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 kobject: 'loop1' (00000000aa3a0686): fill_kobj_path: path = '/devices/virtual/block/loop1' __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __ia32_sys_write+0x71/0xb0 fs/read_write.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 kobject: 'loop5' (0000000017644e80): kobject_uevent_env kobject: 'loop5' (0000000017644e80): fill_kobj_path: path = '/devices/virtual/block/loop5' entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f6bca9 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7f250cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000280 RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000000 kobject: 'loop3' (000000005959ac3c): kobject_uevent_env RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 kobject: 'loop3' (000000005959ac3c): fill_kobj_path: path = '/devices/virtual/block/loop3' Allocated by task 7163: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] ucma_open+0xb5/0x3f0 drivers/infiniband/core/ucma.c:1721 misc_open+0x3ca/0x560 drivers/char/misc.c:141 chrdev_open+0x25a/0x710 fs/char_dev.c:417 do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_compat_sys_openat fs/open.c:1109 [inline] __se_compat_sys_openat fs/open.c:1107 [inline] __ia32_compat_sys_openat+0x98/0xf0 fs/open.c:1107 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 7150: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3813 ucma_close+0x27e/0x310 drivers/infiniband/core/ucma.c:1780 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:341 [inline] do_fast_syscall_32+0xcd5/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 The buggy address belongs to the object at ffff8801cd0c0000 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes inside of 256-byte region [ffff8801cd0c0000, ffff8801cd0c0100) The buggy address belongs to the page: page:ffffea0007343000 count:1 mapcount:0 mapping:ffff8801da8007c0 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea000739cd08 ffffea0007635cc8 ffff8801da8007c0 raw: 0000000000000000 ffff8801cd0c0000 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cd0bff00: fb fb fb fb fb fb fc fc fc fc fb fb fb fb fb fb ffff8801cd0bff80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801cd0c0000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cd0c0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cd0c0100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ==================================================================