0 pages cma reserved ------------[ cut here ]------------ !PageLargeKmalloc(page) WARNING: mm/slub.c:6224 at free_large_kmalloc+0xa3/0x140 mm/slub.c:6224, CPU#0: kworker/0:4/5897 Modules linked in: CPU: 0 UID: 0 PID: 5897 Comm: kworker/0:4 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026 Workqueue: events request_module_async RIP: 0010:free_large_kmalloc+0xa3/0x140 mm/slub.c:6224 Code: f8 ff 74 17 25 00 00 00 ff 3d 00 00 00 f8 0f 85 a0 00 00 00 c7 43 30 ff ff ff ff 48 89 df 89 ee 5b 41 5e 5d e9 9e cf fc ff 90 <0f> 0b 90 48 89 df 48 c7 c6 d2 75 e0 8d 5b 41 5e 5d e9 37 60 08 ff RSP: 0000:ffffc90004957818 EFLAGS: 00010287 RAX: 00000000f0000000 RBX: ffffea0006a63000 RCX: ffff88807d86da01 RDX: 0000000000000000 RSI: ffff8881a98c0000 RDI: ffffea0006a63000 RBP: 0000000000000000 R08: ffff88804f6ae003 R09: 1ffff11009ed5c00 R10: dffffc0000000000 R11: ffffed1009ed5c01 R12: ffff8881b7e4dd68 R13: ffff88804f6ae000 R14: ffff88804f6ae060 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881252a3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa4bb868db4 CR3: 0000000151f72000 CR4: 00000000003526f0 Call Trace: urb_destroy drivers/usb/core/urb.c:25 [inline] kref_put include/linux/kref.h:65 [inline] usb_free_urb+0xd0/0x120 drivers/usb/core/urb.c:97 em28xx_uninit_usb_xfer+0x157/0x320 drivers/media/usb/em28xx/em28xx-core.c:833 em28xx_alloc_urbs+0xee7/0x1100 drivers/media/usb/em28xx/em28xx-core.c:-1 em28xx_dvb_init+0x2b5/0x4b80 drivers/media/usb/em28xx/em28xx-dvb.c:-1 em28xx_init_extension+0x120/0x1c0 drivers/media/usb/em28xx/em28xx-core.c:1117 process_one_work+0x949/0x15a0 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0x9af/0xee0 kernel/workqueue.c:3443 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245