Hello, syzbot found the following crash on: HEAD commit: 673b41e0 staging/octeon: fix up merge error git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15badadbe00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d97026d04c648459 dashboard link: https://syzkaller.appspot.com/bug?extid=934037347002901b8d2a compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12dbb747e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14421b9de00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+934037347002901b8d2a@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.060s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.170s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.270s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.380s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.480s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.590s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.690s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.800s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
