WARNING: CPU: 0 PID: 135 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 135 Comm: kworker/u4:4 Not tainted 5.8.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound ib_unregister_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x45 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 exc_invalid_op+0x24d/0x400 arch/x86/kernel/traps.c:235 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563 RIP: 0010:sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279 Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 37 48 8b 33 48 c7 c7 c0 5a 5a 88 e8 7c 50 5d ff <0f> 0b eb 98 e8 d1 5d cb ff e9 01 ff ff ff 48 89 df e8 c4 5d cb ff RSP: 0018:ffffc90000de7bb0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888097055870 RCX: 0000000000000000 RDX: ffff8880a8dda480 RSI: ffffffff815ce8d7 RDI: fffff520001bcf68 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880ae620fcb R10: 0000000000000000 R11: 0000000000000000 R12: ffff888097055808 R13: ffffffff88e6a360 R14: ffff88809306ba08 R15: ffff8880a1cf4510 ib_free_port_attrs+0x33c/0x580 drivers/infiniband/core/sysfs.c:1324 remove_one_compat_dev drivers/infiniband/core/device.c:951 [inline] remove_compat_devs drivers/infiniband/core/device.c:963 [inline] disable_device+0x1d9/0x270 drivers/infiniband/core/device.c:1294 __ib_unregister_device+0x91/0x190 drivers/infiniband/core/device.c:1450 ib_unregister_work+0x15/0x30 drivers/infiniband/core/device.c:1561 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Kernel Offset: disabled