Hello, syzbot found the following issue on: HEAD commit: 1a4431a5 Merge tag 'afs-fixes-20210315' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11013a7cd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ff6b8b2e9d5a1227 dashboard link: https://syzkaller.appspot.com/bug?extid=889397c820fa56adf25d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1559ae3ad00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=176985c6d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+889397c820fa56adf25d@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff888110082700 (size 64): comm "kworker/1:2", pid 57, jiffies 4294943656 (age 13.350s) hex dump (first 32 bytes): c0 40 0d 0d 81 88 ff ff 40 4b 0d 0d 81 88 ff ff .@......@K...... c0 bc d4 0f 81 88 ff ff 00 b3 d4 0f 81 88 ff ff ................ backtrace: [<ffffffff8304c141>] kmalloc_array.constprop.0+0x41/0x60 include/linux/slab.h:594 [<ffffffff8304dba2>] kcalloc include/linux/slab.h:623 [inline] [<ffffffff8304dba2>] em28xx_alloc_urbs+0x102/0x550 drivers/media/usb/em28xx/em28xx-core.c:930 [<ffffffff84279fa7>] em28xx_dvb_init drivers/media/usb/em28xx/em28xx-dvb.c:1517 [inline] [<ffffffff84279fa7>] em28xx_dvb_init.cold+0xa3/0x2bb1 drivers/media/usb/em28xx/em28xx-dvb.c:1483 [<ffffffff8304e33b>] em28xx_init_extension+0x9b/0xe0 drivers/media/usb/em28xx/em28xx-core.c:1126 [<ffffffff83050143>] request_module_async+0x33/0x40 drivers/media/usb/em28xx/em28xx-cards.c:3406 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259dbb>] process_scheduled_works kernel/workqueue.c:2337 [inline] [<ffffffff81259dbb>] worker_thread+0x2fb/0x5d0 kernel/workqueue.c:2426 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff8881100825c0 (size 64): comm "kworker/1:2", pid 57, jiffies 4294943656 (age 13.350s) hex dump (first 32 bytes): 00 00 b8 10 81 88 ff ff 00 00 b8 0b 81 88 ff ff ................ 00 00 b9 0b 81 88 ff ff 00 00 16 13 81 88 ff ff ................ backtrace: [<ffffffff8304c141>] kmalloc_array.constprop.0+0x41/0x60 include/linux/slab.h:594 [<ffffffff8304dbbc>] kcalloc include/linux/slab.h:623 [inline] [<ffffffff8304dbbc>] em28xx_alloc_urbs+0x11c/0x550 drivers/media/usb/em28xx/em28xx-core.c:934 [<ffffffff84279fa7>] em28xx_dvb_init drivers/media/usb/em28xx/em28xx-dvb.c:1517 [inline] [<ffffffff84279fa7>] em28xx_dvb_init.cold+0xa3/0x2bb1 drivers/media/usb/em28xx/em28xx-dvb.c:1483 [<ffffffff8304e33b>] em28xx_init_extension+0x9b/0xe0 drivers/media/usb/em28xx/em28xx-core.c:1126 [<ffffffff83050143>] request_module_async+0x33/0x40 drivers/media/usb/em28xx/em28xx-cards.c:3406 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259dbb>] process_scheduled_works kernel/workqueue.c:2337 [inline] [<ffffffff81259dbb>] worker_thread+0x2fb/0x5d0 kernel/workqueue.c:2426 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810d0d40c0 (size 192): comm "kworker/1:2", pid 57, jiffies 4294943656 (age 13.350s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 d8 40 0d 0d 81 88 ff ff .........@...... backtrace: [<ffffffff82b9eda6>] kmalloc include/linux/slab.h:559 [inline] [<ffffffff82b9eda6>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74 [<ffffffff8304dd07>] em28xx_alloc_urbs+0x267/0x550 drivers/media/usb/em28xx/em28xx-core.c:952 [<ffffffff84279fa7>] em28xx_dvb_init drivers/media/usb/em28xx/em28xx-dvb.c:1517 [inline] [<ffffffff84279fa7>] em28xx_dvb_init.cold+0xa3/0x2bb1 drivers/media/usb/em28xx/em28xx-dvb.c:1483 [<ffffffff8304e33b>] em28xx_init_extension+0x9b/0xe0 drivers/media/usb/em28xx/em28xx-core.c:1126 [<ffffffff83050143>] request_module_async+0x33/0x40 drivers/media/usb/em28xx/em28xx-cards.c:3406 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259dbb>] process_scheduled_works kernel/workqueue.c:2337 [inline] [<ffffffff81259dbb>] worker_thread+0x2fb/0x5d0 kernel/workqueue.c:2426 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810d0d4b40 (size 192): comm "kworker/1:2", pid 57, jiffies 4294943656 (age 13.350s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 58 4b 0d 0d 81 88 ff ff ........XK...... backtrace: [<ffffffff82b9eda6>] kmalloc include/linux/slab.h:559 [inline] [<ffffffff82b9eda6>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74 [<ffffffff8304dd07>] em28xx_alloc_urbs+0x267/0x550 drivers/media/usb/em28xx/em28xx-core.c:952 [<ffffffff84279fa7>] em28xx_dvb_init drivers/media/usb/em28xx/em28xx-dvb.c:1517 [inline] [<ffffffff84279fa7>] em28xx_dvb_init.cold+0xa3/0x2bb1 drivers/media/usb/em28xx/em28xx-dvb.c:1483 [<ffffffff8304e33b>] em28xx_init_extension+0x9b/0xe0 drivers/media/usb/em28xx/em28xx-core.c:1126 [<ffffffff83050143>] request_module_async+0x33/0x40 drivers/media/usb/em28xx/em28xx-cards.c:3406 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259dbb>] process_scheduled_works kernel/workqueue.c:2337 [inline] [<ffffffff81259dbb>] worker_thread+0x2fb/0x5d0 kernel/workqueue.c:2426 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810fd4bcc0 (size 192): comm "kworker/1:2", pid 57, jiffies 4294943656 (age 13.350s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 d8 bc d4 0f 81 88 ff ff ................ backtrace: [<ffffffff82b9eda6>] kmalloc include/linux/slab.h:559 [inline] [<ffffffff82b9eda6>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74 [<ffffffff8304dd07>] em28xx_alloc_urbs+0x267/0x550 drivers/media/usb/em28xx/em28xx-core.c:952 [<ffffffff84279fa7>] em28xx_dvb_init drivers/media/usb/em28xx/em28xx-dvb.c:1517 [inline] [<ffffffff84279fa7>] em28xx_dvb_init.cold+0xa3/0x2bb1 drivers/media/usb/em28xx/em28xx-dvb.c:1483 [<ffffffff8304e33b>] em28xx_init_extension+0x9b/0xe0 drivers/media/usb/em28xx/em28xx-core.c:1126 [<ffffffff83050143>] request_module_async+0x33/0x40 drivers/media/usb/em28xx/em28xx-cards.c:3406 [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<ffffffff81259dbb>] process_scheduled_works kernel/workqueue.c:2337 [inline] [<ffffffff81259dbb>] worker_thread+0x2fb/0x5d0 kernel/workqueue.c:2426 [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 --- This report is generated by a bot. 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