8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=8c44e003, *pmd=e0940003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 26146 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: 60000093 sp : ec3d1ac8 ip : 82c00024 fp : ec3d1b0c r10: 8280e800 r9 : 00000000 r8 : 82446498 r7 : 8220c940 r6 : 00000008 r5 : 84e37c00 r4 : 851eb85c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8437b900 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 851eb800 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 84e37c00 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 0xec3d0000 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: 26146, stack limit = 0xec3d0000) Stack: (0xec3d1ac8 to 0xec3d2000) 1ac0: 80275518 802a0f18 820a235c 855d9700 00000038 00000001 1ae0: 80000013 851eb85c 00000008 84e37c00 60000013 ec3d1b63 8250ca80 8538e974 1b00: ec3d1b2c ec3d1b10 80260b0c 8026037c 843a7f00 851eb800 00000000 00000001 1b20: ec3d1b5c ec3d1b30 816df870 80260ac8 816901c8 ec3d1bbc ec3d1ba8 851eb800 1b40: 851eb8d8 000001f4 816df8f0 00000000 ec3d1b74 ec3d1b60 816df924 816df7cc 1b60: 01275518 b6345568 ec3d1b94 ec3d1b78 816de4b0 816df8fc 851eb800 81ed5f0c 1b80: 851eb818 851eb8c4 ec3d1bbc ec3d1b98 816deb28 816de488 ec3d1bbc b6345568 1ba0: 8538f800 81ed5f0c 8538f85c 8436aa00 ec3d1bdc ec3d1bc0 816d2e28 816dea1c 1bc0: 8538f800 81ed5f0c 843a7c00 8436aa00 ec3d1bf4 ec3d1be0 816d441c 816d2dc0 1be0: 84e36214 81ed5f0c ec3d1c9c ec3d1bf8 813bf7d4 816d43f8 00000001 ec3d1c08 1c00: 8020d4c4 8020c2fc ec3d1c34 ec3d1c18 8020c314 8020d440 00000000 00000001 1c20: 81777be8 0000167f ec3d1c74 ec3d1c38 816d43ec 00000000 00000000 00000000 1c40: 81a4ae68 0000001f 03010002 00000000 00001117 84e36200 84e36210 84e36214 1c60: 8436aa00 8250ca80 00000000 00000000 ec3d1ca4 b6345568 843a7c00 813bf60c 1c80: 84e36200 0000001c 82210b94 00000000 ec3d1cec ec3d1ca0 813be8c0 813bf618 1ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1cc0: 00000000 00000000 00000000 b6345568 843a7c00 823c074c 8538e800 843a7c00 1ce0: ec3d1d04 ec3d1cf0 813bf130 813be808 82930000 82930064 ec3d1d44 ec3d1d08 1d00: 813bddfc 813bf110 8538e800 0000001c 7fffffff b6345568 ec3d1d44 0000001c 1d20: ec3d1f38 843a7c00 0000001c 8538e800 00000000 00000000 ec3d1da4 ec3d1d48 1d40: 813be144 813bdbb4 00000000 00000000 84e36200 00000000 00000000 8523b780 1d60: 00000000 00001117 00000000 00000000 00000000 b6345568 ec3d1da4 ec3d1f38 1d80: 85a0b180 85a0b180 00000000 00000000 00000000 ec3d1ddc ec3d1dbc ec3d1da8 1da0: 81295f24 813bdf3c ec3d1f38 00000000 ec3d1e2c ec3d1dc0 81296d50 81295ef4 1dc0: 80795af4 80795970 ec3d1e38 ec3d1f48 00000000 00000000 ec3d1e2c ec3d1de8 1de0: 8129895c 80795ad4 ec3d1e38 ec3d1f48 00000000 00000000 20000180 b6345568 1e00: 00000000 00000000 ec3d1f38 85a0b180 00000000 00000000 855d9700 00000128 1e20: ec3d1f24 ec3d1e30 81298a04 81296b50 00000000 81770264 00000000 20000200 1e40: 0000001c 855d9700 ec3d1f24 ec3d1e58 80300518 802fc984 ec3d1e6c 00000000 1e60: ddde6640 855d9700 804a984c 828f8100 ec3d1e8c ec3d1e80 8176e29c 8176e188 1e80: 00000000 ec3d1ee0 ec3d1ed4 ec3d1e98 802fbfd8 808112f0 00088019 85aa0d48 1ea0: 8368dcb0 b6345568 00000064 ec3d1eac ec3d1eac ec3d1eb4 ec3d1eb4 855d9700 1ec0: ec3d1efc ec3d1ed0 804cc504 802ce8a8 00000000 ec3d1f34 ec3d1f30 00000000 1ee0: 00000128 80200288 855d9700 00000128 ec3d1f0c ec3d1f00 804cc578 b6345568 1f00: ec3d1f24 85a0b180 20000140 00000000 00000128 80200288 ec3d1fa4 ec3d1f28 1f20: 81298e58 8129899c 00000000 00000000 00000001 fffffff7 00000000 00000000 1f40: ec3d1fa4 ec3d1f50 01010000 00000000 00000000 ec3d1e44 00000000 00000000 1f60: 00000000 ec3d1f71 00000000 00000000 00000000 00000000 00000008 b6345568 1f80: 80200288 b6345568 00000000 00000000 00000000 0014c110 00000000 ec3d1fa8 1fa0: 80200060 81298e0c 00000000 00000000 00000006 20000140 00000000 00000000 1fc0: 00000000 00000000 0014c110 00000128 7ef253d2 76b8e6d0 7ef25544 76b8e20c 1fe0: 76b8e020 76b8e010 000164dc 0004d5a0 60000010 00000006 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:8538e974 r9:8250ca80 r8:ec3d1b63 r7:60000013 r6:84e37c00 r5:00000008 r4:851eb85c [<80260abc>] (queue_work_on) from [<816df870>] (queue_work include/linux/workqueue.h:503 [inline]) [<80260abc>] (queue_work_on) from [<816df870>] (nci_send_cmd+0xb0/0x110 net/nfc/nci/core.c:1376) r7:00000001 r6:00000000 r5:851eb800 r4:843a7f00 [<816df7c0>] (nci_send_cmd) from [<816df924>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816df8f0 r6:000001f4 r5:851eb8d8 r4:851eb800 [<816df8f0>] (nci_reset_req) from [<816de4b0>] (__nci_request+0x34/0xd8 net/nfc/nci/core.c:107) [<816de47c>] (__nci_request) from [<816deb28>] (nci_open_device net/nfc/nci/core.c:502 [inline]) [<816de47c>] (__nci_request) from [<816deb28>] (nci_dev_up+0x118/0x1f8 net/nfc/nci/core.c:631) r7:851eb8c4 r6:851eb818 r5:81ed5f0c r4:851eb800 [<816dea10>] (nci_dev_up) from [<816d2e28>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:8436aa00 r6:8538f85c r5:81ed5f0c r4:8538f800 [<816d2db4>] (nfc_dev_up) from [<816d441c>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:8436aa00 r6:843a7c00 r5:81ed5f0c r4:8538f800 [<816d43ec>] (nfc_genl_dev_up) from [<813bf7d4>] (genl_family_rcv_msg_doit net/netlink/genetlink.c:756 [inline]) [<816d43ec>] (nfc_genl_dev_up) from [<813bf7d4>] (genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]) [<816d43ec>] (nfc_genl_dev_up) from [<813bf7d4>] (genl_rcv_msg+0x1c8/0x3f4 net/netlink/genetlink.c:850) r5:81ed5f0c r4:84e36214 [<813bf60c>] (genl_rcv_msg) from [<813be8c0>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:84e36200 r5:813bf60c r4:843a7c00 [<813be7fc>] (netlink_rcv_skb) from [<813bf130>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:843a7c00 r6:8538e800 r5:823c074c r4:843a7c00 [<813bf104>] (genl_rcv) from [<813bddfc>] (netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]) [<813bf104>] (genl_rcv) from [<813bddfc>] (netlink_unicast+0x254/0x388 net/netlink/af_netlink.c:1345) r5:82930064 r4:82930000 [<813bdba8>] (netlink_unicast) from [<813be144>] (netlink_sendmsg+0x214/0x4a8 net/netlink/af_netlink.c:1921) r10:00000000 r9:00000000 r8:8538e800 r7:0000001c r6:843a7c00 r5:ec3d1f38 r4:0000001c [<813bdf30>] (netlink_sendmsg) from [<81295f24>] (sock_sendmsg_nosec net/socket.c:714 [inline]) [<813bdf30>] (netlink_sendmsg) from [<81295f24>] (sock_sendmsg+0x3c/0x4c net/socket.c:734) r10:ec3d1ddc r9:00000000 r8:00000000 r7:00000000 r6:85a0b180 r5:85a0b180 r4:ec3d1f38 [<81295ee8>] (sock_sendmsg) from [<81296d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:ec3d1f38 [<81296b44>] (____sys_sendmsg) from [<81298a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:855d9700 r8:00000000 r7:00000000 r6:85a0b180 r5:ec3d1f38 r4:00000000 [<81298990>] (___sys_sendmsg) from [<81298e58>] (__sys_sendmsg net/socket.c:2565 [inline]) [<81298990>] (___sys_sendmsg) from [<81298e58>] (__do_sys_sendmsg net/socket.c:2574 [inline]) [<81298990>] (___sys_sendmsg) from [<81298e58>] (sys_sendmsg+0x58/0xa0 net/socket.c:2572) r8:80200288 r7:00000128 r6:00000000 r5:20000140 r4:85a0b180 [<81298e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xec3d1fa8 to 0xec3d1ff0) 1fa0: 00000000 00000000 00000006 20000140 00000000 00000000 1fc0: 00000000 00000000 0014c110 00000128 7ef253d2 76b8e6d0 7ef25544 76b8e20c 1fe0: 76b8e020 76b8e010 000164dc 0004d5a0 r6:0014c110 r5:00000000 r4:00000000 Code: 0a00003b e59f06a8 eb532efb e1a0a000 (e5990000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 0a00003b beq 0xf4 4: e59f06a8 ldr r0, [pc, #1704] ; 0x6b4 8: eb532efb bl 0x14cbbfc c: e1a0a000 mov sl, r0 * 10: e5990000 ldr r0, [r9] <-- trapping instruction