8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=84fde003, *pmd=e0a27003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 9515 Comm: syz-executor.0 Not tainted 6.1.0-rc4-syzkaller #0 Hardware name: ARM-Versatile Express PC is at __queue_work+0xa0/0x74c kernel/workqueue.c:1459 LR is at 0x82c00000 pc : [<80260410>] lr : [<82c00000>] psr: 60000093 sp : eb025ac8 ip : 82c00024 fp : eb025b0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 851a1800 r4 : 84c7305c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8599bf80 DAC: fffffffd Register r0 information: slab kmalloc-512 start 8280e800 pointer offset 0 size 512 Register r1 information: non-paged memory Register r2 information: NULL pointer Register r3 information: NULL pointer Register r4 information: slab kmalloc-2k start 84c73000 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 851a1800 pointer offset 0 size 512 Register r6 information: non-paged memory Register r7 information: non-slab/vmalloc memory Register r8 information: non-slab/vmalloc memory Register r9 information: NULL pointer Register r10 information: slab kmalloc-512 start 8280e800 pointer offset 0 size 512 Register r11 information: 2-page vmalloc region starting at 0xeb024000 allocated at kernel_clone+0x9c/0x3f4 kernel/fork.c:2671 Register r12 information: slab radix_tree_node start 82c00000 pointer offset 36 Process syz-executor.0 (pid: 9515, stack limit = 0xeb024000) Stack: (0xeb025ac8 to 0xeb026000) 5ac0: 80275518 802a0f18 820a235c 828ef300 0000002e 00000000 5ae0: 80000013 84c7305c 00000008 851a1800 60000013 eb025b63 8250f9c0 853d5d74 5b00: eb025b2c eb025b10 80260b0c 8026037c 84b81d80 84c73000 00000000 00000001 5b20: eb025b5c eb025b30 816cb278 80260ac8 8167bbd0 eb025bbc eb025ba8 84c73000 5b40: 84c730d8 000001f4 816cb2f8 00000000 eb025b74 eb025b60 816cb32c 816cb1d4 5b60: 01275518 b5c3ce52 eb025b94 eb025b78 816c9eb8 816cb304 84c73000 81ed8f0c 5b80: 84c73018 84c730c4 eb025bbc eb025b98 816ca530 816c9e90 eb025bbc b5c3ce52 5ba0: 853d6400 81ed8f0c 853d645c 85908600 eb025bdc eb025bc0 816be830 816ca424 5bc0: 853d6400 81ed8f0c 84b81180 85908600 eb025bf4 eb025be0 816bfe24 816be7c8 5be0: 85819214 81ed8f0c eb025c9c eb025bf8 813b6a80 816bfe00 00000001 eb025c08 5c00: 807a9ef8 81762290 eb025c34 eb025c18 8020c314 8020d440 00000000 00000001 5c20: 81761bf8 00000122 eb025c74 eb025c38 816bfdf4 00000000 00000000 00000000 5c40: 81a4d3a0 0000001f 03010002 00000000 00004de9 85819200 85819210 85819214 5c60: 85908600 8250f9c0 00000000 00000000 eb025ca4 b5c3ce52 84b81180 813b68b8 5c80: 85819200 0000001c 82210b94 00000000 eb025cec eb025ca0 813b5b6c 813b68c4 5ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5cc0: 00000000 00000000 00000000 b5c3ce52 84b81180 823bfe4c 853d5c00 84b81180 5ce0: eb025d04 eb025cf0 813b63dc 813b5ab4 82930000 82930064 eb025d44 eb025d08 5d00: 813b50a8 813b63bc 853d5c00 0000001c 7fffffff b5c3ce52 eb025d44 0000001c 5d20: eb025f38 84b81180 0000001c 853d5c00 00000000 00000000 eb025da4 eb025d48 5d40: 813b53f0 813b4e60 00000000 00000000 85819200 00000000 00000000 85312e00 5d60: 00000000 00004de9 00000000 00000000 00000000 b5c3ce52 eb025da4 eb025f38 5d80: 86023680 86023680 00000000 00000000 00000000 eb025ddc eb025dbc eb025da8 5da0: 8128ff6c 813b51e8 eb025f38 00000000 eb025e2c eb025dc0 81290d50 8128ff3c 5dc0: 80795b6c 807959e8 eb025e38 eb025f48 00000000 00000000 eb025e2c eb025de8 5de0: 8129295c 80795b4c eb025e38 eb025f48 00000000 00000000 20000180 b5c3ce52 5e00: 00000000 00000000 eb025f38 86023680 00000000 00000000 828ef300 00000128 5e20: eb025f24 eb025e30 81292a04 81290b50 00000000 8175a274 00000000 200001c0 5e40: 0000001c 828ef300 eb025f24 eb025e58 80300518 802fc984 eb025e6c 00000000 5e60: 00000000 828ef300 86023680 828fcd00 eb025f8c eb025e80 81292274 804a94b8 5e80: 00000000 eb025ee0 eb025ed4 eb025e98 802fbfd8 80811368 00000000 00000000 5ea0: 00000000 b5c3ce52 00000064 eb025eac eb025ef4 eb025ec0 802fab54 810b235c 5ec0: eb025efc eb025ed0 804cbfe8 802ce8a8 00000000 eb025f34 eb025f30 00000000 5ee0: 00000128 80200288 828ef300 00000128 eb025f0c eb025f00 804cc05c b5c3ce52 5f00: eb025f24 86023680 20000140 00000000 00000128 80200288 eb025fa4 eb025f28 5f20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 5f40: eb025f5c eb025f50 01010000 00000000 00000000 eb025e44 00000000 00000000 5f60: 00000000 00000001 00000000 00000000 00000000 00000000 eb025f9c eb025f88 5f80: 803ecf68 b5c3ce52 00000000 00000000 00000000 0014c1a0 00000000 eb025fa8 5fa0: 80200060 81292e0c 00000000 00000000 00000008 20000140 00000000 00000000 5fc0: 00000000 00000000 0014c1a0 00000128 7eee33d2 76b986d0 7eee3544 76b9820c 5fe0: 76b98020 76b98010 000164dc 0004d5a0 60000010 00000008 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:853d5d74 r9:8250f9c0 r8:eb025b63 r7:60000013 r6:851a1800 r5:00000008 r4:84c7305c [<80260abc>] (queue_work_on) from [<816cb278>] (queue_work include/linux/workqueue.h:503 [inline]) [<80260abc>] (queue_work_on) from [<816cb278>] (nci_send_cmd+0xb0/0x110 net/nfc/nci/core.c:1376) r7:00000001 r6:00000000 r5:84c73000 r4:84b81d80 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:84c730d8 r4:84c73000 [<816cb2f8>] (nci_reset_req) from [<816c9eb8>] (__nci_request+0x34/0xd8 net/nfc/nci/core.c:107) [<816c9e84>] (__nci_request) from [<816ca530>] (nci_open_device net/nfc/nci/core.c:502 [inline]) [<816c9e84>] (__nci_request) from [<816ca530>] (nci_dev_up+0x118/0x1f8 net/nfc/nci/core.c:631) r7:84c730c4 r6:84c73018 r5:81ed8f0c r4:84c73000 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:85908600 r6:853d645c r5:81ed8f0c r4:853d6400 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:85908600 r6:84b81180 r5:81ed8f0c r4:853d6400 [<816bfdf4>] (nfc_genl_dev_up) from [<813b6a80>] (genl_family_rcv_msg_doit net/netlink/genetlink.c:756 [inline]) [<816bfdf4>] (nfc_genl_dev_up) from [<813b6a80>] (genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]) [<816bfdf4>] (nfc_genl_dev_up) from [<813b6a80>] (genl_rcv_msg+0x1c8/0x3f4 net/netlink/genetlink.c:850) r5:81ed8f0c r4:85819214 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:85819200 r5:813b68b8 r4:84b81180 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:84b81180 r6:853d5c00 r5:823bfe4c r4:84b81180 [<813b63b0>] (genl_rcv) from [<813b50a8>] (netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]) [<813b63b0>] (genl_rcv) from [<813b50a8>] (netlink_unicast+0x254/0x388 net/netlink/af_netlink.c:1345) r5:82930064 r4:82930000 [<813b4e54>] (netlink_unicast) from [<813b53f0>] (netlink_sendmsg+0x214/0x4a8 net/netlink/af_netlink.c:1921) r10:00000000 r9:00000000 r8:853d5c00 r7:0000001c r6:84b81180 r5:eb025f38 r4:0000001c [<813b51dc>] (netlink_sendmsg) from [<8128ff6c>] (sock_sendmsg_nosec net/socket.c:714 [inline]) [<813b51dc>] (netlink_sendmsg) from [<8128ff6c>] (sock_sendmsg+0x3c/0x4c net/socket.c:734) r10:eb025ddc r9:00000000 r8:00000000 r7:00000000 r6:86023680 r5:86023680 r4:eb025f38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:eb025f38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:828ef300 r8:00000000 r7:00000000 r6:86023680 r5:eb025f38 r4:00000000 [<81292990>] (___sys_sendmsg) from [<81292e58>] (__sys_sendmsg net/socket.c:2565 [inline]) [<81292990>] (___sys_sendmsg) from [<81292e58>] (__do_sys_sendmsg net/socket.c:2574 [inline]) [<81292990>] (___sys_sendmsg) from [<81292e58>] (sys_sendmsg+0x58/0xa0 net/socket.c:2572) r8:80200288 r7:00000128 r6:00000000 r5:20000140 r4:86023680 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xeb025fa8 to 0xeb025ff0) 5fa0: 00000000 00000000 00000008 20000140 00000000 00000000 5fc0: 00000000 00000000 0014c1a0 00000128 7eee33d2 76b986d0 7eee3544 76b9820c 5fe0: 76b98020 76b98010 000164dc 0004d5a0 r6:0014c1a0 r5:00000000 r4:00000000 Code: 0a00003b e59f06a8 eb52dc03 e1a0a000 (e5990000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 0a00003b beq 0xf4 4: e59f06a8 ldr r0, [pc, #1704] ; 0x6b4 8: eb52dc03 bl 0x14b701c c: e1a0a000 mov sl, r0 * 10: e5990000 ldr r0, [r9] <-- trapping instruction