8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=855bd003, *pmd=fe6ad003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 29778 Comm: syz-executor.0 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 : ee2d1ac8 ip : 82c00024 fp : ee2d1b0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 84eaf000 r4 : 84fcd85c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85140b40 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 84fcd800 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 84eaf000 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 0xee2d0000 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: 29778, stack limit = 0xee2d0000) Stack: (0xee2d1ac8 to 0xee2d2000) 1ac0: 80275518 802a0f18 820a235c 83e2d080 00000007 00000000 1ae0: 80000113 84fcd85c 00000008 84eaf000 60000113 ee2d1b63 8250f9c0 85394574 1b00: ee2d1b2c ee2d1b10 80260b0c 8026037c 83c0d180 84fcd800 00000000 00000001 1b20: ee2d1b5c ee2d1b30 816cb278 80260ac8 8167bbd0 ee2d1bbc ee2d1ba8 84fcd800 1b40: 84fcd8d8 000001f4 816cb2f8 00000000 ee2d1b74 ee2d1b60 816cb32c 816cb1d4 1b60: 01275518 3d68695e ee2d1b94 ee2d1b78 816c9eb8 816cb304 84fcd800 81ed8f0c 1b80: 84fcd818 84fcd8c4 ee2d1bbc ee2d1b98 816ca530 816c9e90 ee2d1bbc 3d68695e 1ba0: 85397000 81ed8f0c 8539705c 851bc000 ee2d1bdc ee2d1bc0 816be830 816ca424 1bc0: 85397000 81ed8f0c 83c0dc00 851bc000 ee2d1bf4 ee2d1be0 816bfe24 816be7c8 1be0: 842f0014 81ed8f0c ee2d1c9c ee2d1bf8 813b6a80 816bfe00 00000001 ddead3a8 1c00: 806b8ef8 00000004 00000000 854bce40 ee2d1c54 ee2d1c20 80481b64 807a9dc0 1c20: 806b8754 818d0014 ee2d1c78 8501a340 816bfdf4 00000000 00000000 00000000 1c40: 81a4d3a0 0000001f 03010002 00000000 00002363 842f0000 842f0010 842f0014 1c60: 851bc000 8250f9c0 00000000 00000000 ee2d1ca4 3d68695e 83c0dc00 813b68b8 1c80: 842f0000 0000001c 82210b94 00000000 ee2d1cec ee2d1ca0 813b5b6c 813b68c4 1ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1cc0: 00000000 00000000 00000000 3d68695e 83c0dc00 823bfe4c 85394400 83c0dc00 1ce0: ee2d1d04 ee2d1cf0 813b63dc 813b5ab4 82930000 82930064 ee2d1d44 ee2d1d08 1d00: 813b50a8 813b63bc 85394400 0000001c 7fffffff 3d68695e ee2d1d44 0000001c 1d20: ee2d1f38 83c0dc00 0000001c 85394400 00000000 00000000 ee2d1da4 ee2d1d48 1d40: 813b53f0 813b4e60 00000000 00000000 842f0000 00000000 00000000 841a5e80 1d60: 00000000 00002363 00000000 00000000 00000000 3d68695e ee2d1da4 ee2d1f38 1d80: 8468b180 8468b180 00000000 00000000 00000000 ee2d1ddc ee2d1dbc ee2d1da8 1da0: 8128ff6c 813b51e8 ee2d1f38 00000000 ee2d1e2c ee2d1dc0 81290d50 8128ff3c 1dc0: 80795b6c 807959e8 ee2d1e38 ee2d1f48 00000000 00000000 ee2d1e2c ee2d1de8 1de0: 8129295c 80795b4c ee2d1e38 ee2d1f48 00000000 00000000 20000180 3d68695e 1e00: 00000000 00000000 ee2d1f38 8468b180 00000000 00000000 83e2d080 00000128 1e20: ee2d1f24 ee2d1e30 81292a04 81290b50 00000000 8175a274 00000000 200001c0 1e40: 0000001c 83e2d080 ee2d1f24 ee2d1e58 80300518 802fc984 ee2d1e6c 00000000 1e60: dddd5640 83e2d080 804a9330 828f9240 ee2d1e8c ee2d1e80 817582ac 81758198 1e80: 00000000 ee2d1ee0 ee2d1ed4 ee2d1e98 802fbfd8 80811368 0000001d 00000000 1ea0: 00000000 3d68695e 00000064 ee2d1eac ee2d1ef4 ee2d1ec0 802fab54 810b235c 1ec0: ee2d1efc ee2d1ed0 804cbfe8 802ce8a8 00000000 ee2d1f34 ee2d1f30 00000000 1ee0: 00000128 80200288 83e2d080 00000128 ee2d1f0c ee2d1f00 804cc05c 3d68695e 1f00: ee2d1f24 8468b180 20000140 00000000 00000128 80200288 ee2d1fa4 ee2d1f28 1f20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 1f40: ee2d1f5c ee2d1f50 01010000 00000000 00000000 ee2d1e44 00000000 00000000 1f60: 00000000 00000001 00000000 00000000 00000000 00000000 ee2d1f9c ee2d1f88 1f80: 803ecf68 3d68695e 00000000 00000000 00000000 0014c1a0 00000000 ee2d1fa8 1fa0: 80200060 81292e0c 00000000 00000000 00000006 20000140 00000000 00000000 1fc0: 00000000 00000000 0014c1a0 00000128 7ecb13d2 76b4c6d0 7ecb1544 76b4c20c 1fe0: 76b4c020 76b4c010 000164dc 0004d5a0 60000010 00000006 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:85394574 r9:8250f9c0 r8:ee2d1b63 r7:60000113 r6:84eaf000 r5:00000008 r4:84fcd85c [<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 r5:84fcd800 r4:83c0d180 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:84fcd8d8 r4:84fcd800 [<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) r7:84fcd8c4 r6:84fcd818 r5:81ed8f0c r4:84fcd800 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:851bc000 r6:8539705c r5:81ed8f0c r4:85397000 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:851bc000 r6:83c0dc00 r5:81ed8f0c r4:85397000 [<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 r4:842f0014 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:842f0000 r5:813b68b8 r4:83c0dc00 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:83c0dc00 r6:85394400 r5:823bfe4c r4:83c0dc00 [<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 r8:85394400 r7:0000001c r6:83c0dc00 r5:ee2d1f38 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:ee2d1ddc r9:00000000 r8:00000000 r7:00000000 r6:8468b180 r5:8468b180 r4:ee2d1f38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:ee2d1f38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:83e2d080 r8:00000000 r7:00000000 r6:8468b180 r5:ee2d1f38 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 r4:8468b180 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xee2d1fa8 to 0xee2d1ff0) 1fa0: 00000000 00000000 00000006 20000140 00000000 00000000 1fc0: 00000000 00000000 0014c1a0 00000128 7ecb13d2 76b4c6d0 7ecb1544 76b4c20c 1fe0: 76b4c020 76b4c010 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