general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357] CPU: 0 PID: 21755 Comm: syz-executor.5 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff RSP: 0018:ffffc90000007b08 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214e7ec00 RCX: ffffffff8716d623 RDX: 000000000000006a RSI: ffffffff8716d792 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88805595a8e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888214e7ec00 R13: 0000000000000078 R14: ffff88805b5e2980 R15: 0000000000000010 FS: 00007f777a9f5700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2be21000 CR3: 000000003acaa000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4bd/0x1978 net/rose/af_rose.c:998 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__orc_find+0x4d/0xf0 arch/x86/kernel/unwind_orc.c:49 Code: 0f 87 9a 00 00 00 49 bf 00 00 00 00 00 fc ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 48 29 e8 <48> 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 RSP: 0018:ffffc9000c0a7508 EFLAGS: 00000216 RAX: 000000000000000c RBX: ffffffff8ac553fc RCX: ffffffff81b3c495 RDX: 0000000000000000 RSI: ffffffff8b25a474 RDI: ffffffff8ac553ec RBP: ffffffff8ac553ec R08: ffffffff8b25a4aa R09: ffffffff8b25a474 R10: 000000000007201e R11: 00000000000294f6 R12: ffffffff8ac553f8 R13: ffffffff8ac553ec R14: ffffffff8ac553ec R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:172 [inline] unwind_next_frame+0x342/0x1f90 arch/x86/kernel/unwind_orc.c:449 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc_trace+0x136/0x2d0 mm/slab.c:3549 kmalloc include/linux/slab.h:555 [inline] kzalloc include/linux/slab.h:669 [inline] alloc_group_attrs+0x1d4/0x2f0 drivers/infiniband/core/sysfs.c:743 add_port drivers/infiniband/core/sysfs.c:1109 [inline] ib_setup_port_attrs+0x8cb/0x12f0 drivers/infiniband/core/sysfs.c:1345 add_one_compat_dev+0x4ab/0x800 drivers/infiniband/core/device.c:918 rdma_dev_init_net+0x2dc/0x480 drivers/infiniband/core/device.c:1134 ops_init+0xaf/0x470 net/core/net_namespace.c:151 setup_net+0x2d8/0x850 net/core/net_namespace.c:341 copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482 create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231 ksys_unshare+0x445/0x8e0 kernel/fork.c:2943 __do_sys_unshare kernel/fork.c:3011 [inline] __se_sys_unshare kernel/fork.c:3009 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3009 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ce69 Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f777a9f4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000035640 RCX: 000000000045ce69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000118bf50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffe41f73a2f R14: 00007f777a9f59c0 R15: 000000000118bf2c Modules linked in: ---[ end trace 0d9fffcfc6f30ead ]--- RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff RSP: 0018:ffffc90000007b08 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888214e7ec00 RCX: ffffffff8716d623 RDX: 000000000000006a RSI: ffffffff8716d792 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88805595a8e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888214e7ec00 R13: 0000000000000078 R14: ffff88805b5e2980 R15: 0000000000000010 FS: 00007f777a9f5700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2be21000 CR3: 000000003acaa000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400