8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=855c4003, *pmd=fe6ab003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 24961 Comm: syz-executor.1 Not tainted 6.1.0-rc5-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: 60000193 sp : df9e9ac8 ip : 82c00024 fp : df9e9b0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 848e6600 r4 : 862ce85c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 84a97b80 DAC: 00000000 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 862ce800 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 848e6600 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 0xdf9e8000 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.1 (pid: 24961, stack limit = 0xdf9e8000) Stack: (0xdf9e9ac8 to 0xdf9ea000) 9ac0: 80275518 802a0f18 820a235c 85107300 00000006 00000001 9ae0: 80000113 862ce85c 00000008 848e6600 60000113 df9e9b63 8250f9c0 854dd974 9b00: df9e9b2c df9e9b10 80260b0c 8026037c 84b0b540 862ce800 00000000 00000001 9b20: df9e9b5c df9e9b30 816cb278 80260ac8 8167bbd0 df9e9bbc df9e9ba8 862ce800 9b40: 862ce8d8 000001f4 816cb2f8 00000000 df9e9b74 df9e9b60 816cb32c 816cb1d4 9b60: 01275518 26183755 df9e9b94 df9e9b78 816c9eb8 816cb304 862ce800 81ed8f0c 9b80: 862ce818 862ce8c4 df9e9bbc df9e9b98 816ca530 816c9e90 df9e9bbc 26183755 9ba0: 85473800 81ed8f0c 8547385c 854c2680 df9e9bdc df9e9bc0 816be830 816ca424 9bc0: 85473800 81ed8f0c 84b0b840 854c2680 df9e9bf4 df9e9be0 816bfe24 816be7c8 9be0: 848e6a14 81ed8f0c df9e9c9c df9e9bf8 813b6a80 816bfe00 00000001 df9e9c08 9c00: 8020d4c4 8020c2fc df9e9c34 df9e9c18 8020c314 8020d440 00000000 00000001 9c20: 81761bf8 00000467 df9e9c74 df9e9c38 816bfdf4 00000000 00000000 00000000 9c40: 81a4d3a0 0000001f 03010002 00000000 b34232c6 848e6a00 848e6a10 848e6a14 9c60: 854c2680 8250f9c0 00000000 00000000 df9e9ca4 26183755 84b0b840 813b68b8 9c80: 848e6a00 0000001c 82210b94 00000000 df9e9cec df9e9ca0 813b5b6c 813b68c4 9ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9cc0: 00000000 00000000 00000000 26183755 84b0b840 823bfe4c 854dd800 84b0b840 9ce0: df9e9d04 df9e9cf0 813b63dc 813b5ab4 82930000 82930064 df9e9d44 df9e9d08 9d00: 813b50a8 813b63bc 854dd800 0000001c 7fffffff 26183755 df9e9d44 0000001c 9d20: df9e9f38 84b0b840 0000001c 854dd800 00000000 00000000 df9e9da4 df9e9d48 9d40: 813b53f0 813b4e60 00000000 00000000 848e6a00 00000000 00000000 84917780 9d60: 00000000 00005c82 00000000 00000000 00000000 26183755 df9e9da4 df9e9f38 9d80: 84608a00 84608a00 00000000 00000000 00000000 df9e9ddc df9e9dbc df9e9da8 9da0: 8128ff6c 813b51e8 df9e9f38 00000000 df9e9e2c df9e9dc0 81290d50 8128ff3c 9dc0: 80795b6c 807959e8 df9e9e38 df9e9f48 00000000 00000000 df9e9e2c df9e9de8 9de0: 8129295c 80795b4c df9e9e38 df9e9f48 00000000 00000000 20000180 26183755 9e00: 00000000 00000000 df9e9f38 84608a00 00000000 00000000 85107300 00000128 9e20: df9e9f24 df9e9e30 81292a04 81290b50 00000000 8175a274 00000000 200001c0 9e40: 0000001c 85107300 df9e9f24 df9e9e58 80300518 802fc984 df9e9e6c 00000000 9e60: ddde6640 85107300 804a9330 828fbc00 df9e9e8c df9e9e80 817582ac 81758198 9e80: 00000000 df9e9ee0 df9e9ed4 df9e9e98 802fbfd8 80811368 00088019 859a1e58 9ea0: 858e0f30 26183755 00000064 df9e9eac df9e9ef4 df9e9ec0 802fab54 810b235c 9ec0: df9e9efc df9e9ed0 804cbfe8 802ce8a8 00000000 df9e9f34 df9e9f30 00000000 9ee0: 00000128 80200288 85107300 00000128 df9e9f0c df9e9f00 804cc05c 26183755 9f00: df9e9f24 84608a00 20000140 00000000 00000128 80200288 df9e9fa4 df9e9f28 9f20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 9f40: df9e9f5c df9e9f50 01010000 00000000 00000000 df9e9e44 00000000 00000000 9f60: 00000000 00000001 00000000 00000000 00000000 00000000 df9e9f9c df9e9f88 9f80: 803ecf68 26183755 00000000 00000000 00000000 0014c080 00000000 df9e9fa8 9fa0: 80200060 81292e0c 00000000 00000000 00000007 20000140 00000000 00000000 9fc0: 00000000 00000000 0014c080 00000128 7ede93d2 76b216d0 7ede9544 76b2120c 9fe0: 76b21020 76b21010 000164dc 0004d5a0 60000010 00000007 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:854dd974 r9:8250f9c0 r8:df9e9b63 r7:60000113 r6:848e6600 r5:00000008 r4:862ce85c [<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 r5:862ce800 r4:84b0b540 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:862ce8d8 r4:862ce800 [<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) r7:862ce8c4 r6:862ce818 r5:81ed8f0c r4:862ce800 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:854c2680 r6:8547385c r5:81ed8f0c r4:85473800 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:854c2680 r6:84b0b840 r5:81ed8f0c r4:85473800 [<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 r4:848e6a14 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:848e6a00 r5:813b68b8 r4:84b0b840 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:84b0b840 r6:854dd800 r5:823bfe4c r4:84b0b840 [<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 r8:854dd800 r7:0000001c r6:84b0b840 r5:df9e9f38 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:df9e9ddc r9:00000000 r8:00000000 r7:00000000 r6:84608a00 r5:84608a00 r4:df9e9f38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:df9e9f38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:85107300 r8:00000000 r7:00000000 r6:84608a00 r5:df9e9f38 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 r4:84608a00 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xdf9e9fa8 to 0xdf9e9ff0) 9fa0: 00000000 00000000 00000007 20000140 00000000 00000000 9fc0: 00000000 00000000 0014c080 00000128 7ede93d2 76b216d0 7ede9544 76b2120c 9fe0: 76b21020 76b21010 000164dc 0004d5a0 r6:0014c080 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