8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=850be003, *pmd=dfe85003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 21122 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 : ee2b1ac8 ip : 82c00024 fp : ee2b1b0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 8537ce00 r4 : 851d085c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 85070300 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 851d0800 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 8537ce00 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 0xee2b0000 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: 21122, stack limit = 0xee2b0000) Stack: (0xee2b1ac8 to 0xee2b2000) 1ac0: 80275518 802a0f18 820a235c 8516dc00 00000020 00000001 1ae0: 80000013 851d085c 00000008 8537ce00 60000013 ee2b1b63 8250f9c0 8532e574 1b00: ee2b1b2c ee2b1b10 80260b0c 8026037c 85089180 851d0800 00000000 00000001 1b20: ee2b1b5c ee2b1b30 816cb278 80260ac8 8167bbd0 ee2b1bbc ee2b1ba8 851d0800 1b40: 851d08d8 000001f4 816cb2f8 00000000 ee2b1b74 ee2b1b60 816cb32c 816cb1d4 1b60: 01275518 79939c9b ee2b1b94 ee2b1b78 816c9eb8 816cb304 851d0800 81ed8f0c 1b80: 851d0818 851d08c4 ee2b1bbc ee2b1b98 816ca530 816c9e90 ee2b1bbc 79939c9b 1ba0: 84b07c00 81ed8f0c 84b07c5c 850ca300 ee2b1bdc ee2b1bc0 816be830 816ca424 1bc0: 84b07c00 81ed8f0c 85089c00 850ca300 ee2b1bf4 ee2b1be0 816bfe24 816be7c8 1be0: 8537d414 81ed8f0c ee2b1c9c ee2b1bf8 813b6a80 816bfe00 00000001 824484f8 1c00: ee2b1c1c ee2b1c10 817582ac 81758198 ee2b1c4c ee2b1c20 8027ae00 802745b4 1c20: ffedc000 8516dc00 00000001 79939c9b 816bfdf4 00000000 00000000 00000000 1c40: 81a4d3a0 0000001f 03010002 00000000 000018e0 8537d400 8537d410 8537d414 1c60: 850ca300 8250f9c0 00000000 00000000 ee2b1ca4 79939c9b 85089c00 813b68b8 1c80: 8537d400 0000001c 82210b94 00000000 ee2b1cec ee2b1ca0 813b5b6c 813b68c4 1ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1cc0: 00000000 00000000 00000000 79939c9b 85089c00 823bfe4c 8532e400 85089c00 1ce0: ee2b1d04 ee2b1cf0 813b63dc 813b5ab4 82930000 82930064 ee2b1d44 ee2b1d08 1d00: 813b50a8 813b63bc 8532e400 0000001c 7fffffff 79939c9b ee2b1d44 0000001c 1d20: ee2b1f38 85089c00 0000001c 8532e400 00000000 00000000 ee2b1da4 ee2b1d48 1d40: 813b53f0 813b4e60 00000000 00000000 8537d400 00000000 00000000 850cd980 1d60: 00000000 000018e0 00000000 00000000 00000000 79939c9b ee2b1da4 ee2b1f38 1d80: 83645680 83645680 00000000 00000000 00000000 ee2b1ddc ee2b1dbc ee2b1da8 1da0: 8128ff6c 813b51e8 ee2b1f38 00000000 ee2b1e2c ee2b1dc0 81290d50 8128ff3c 1dc0: 80795b6c 807959e8 ee2b1e38 ee2b1f48 00000000 00000000 ee2b1e2c ee2b1de8 1de0: 8129295c 80795b4c ee2b1e38 ee2b1f48 00000000 00000000 20000180 79939c9b 1e00: 00000000 00000000 ee2b1f38 83645680 00000000 00000000 8516dc00 00000128 1e20: ee2b1f24 ee2b1e30 81292a04 81290b50 00000000 00000255 00000000 200001c0 1e40: 0000001c 80283680 dddd4d80 852ea280 ee2b1e7c ee2b1e60 802789c4 80278950 1e60: ee2b1e7c ee2b1e70 817622b4 802745b4 ee2b1ecc ee2b1e80 80279278 802745b4 1e80: 802783f0 80274e70 84173238 ee265e74 20000013 00000000 802a0540 79939c9b 1ea0: ee2b1ed4 852ea288 00000001 852ea280 ee2b1ef4 ee2b1ec0 802fab54 810b235c 1ec0: ee2b1efc ee2b1ed0 804cbfe8 802ce8a8 00000000 ee2b1f34 ee2b1f30 00000000 1ee0: 00000128 80200288 8516dc00 00000128 ee2b1f0c ee2b1f00 804cc05c 79939c9b 1f00: ee2b1f24 83645680 20000140 00000000 00000128 80200288 ee2b1fa4 ee2b1f28 1f20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 1f40: ee2b1f5c ee2b1f50 01010000 00000000 00000000 ee2b1e44 00000000 00000000 1f60: 00000000 00000001 00000000 00000000 00000000 00000000 ee2b1f9c ee2b1f88 1f80: 803ecf68 79939c9b 00000000 00000000 00000000 0014c2c0 00000000 ee2b1fa8 1fa0: 80200060 81292e0c 00000000 00000000 00000006 20000140 00000000 00000000 1fc0: 00000000 00000000 0014c2c0 00000128 7ec913d2 76b0c6d0 7ec91544 76b0c20c 1fe0: 76b0c020 76b0c010 000164dc 0004d5a0 60000010 00000006 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:8532e574 r9:8250f9c0 r8:ee2b1b63 r7:60000013 r6:8537ce00 r5:00000008 r4:851d085c [<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 r5:851d0800 r4:85089180 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:851d08d8 r4:851d0800 [<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) r7:851d08c4 r6:851d0818 r5:81ed8f0c r4:851d0800 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:850ca300 r6:84b07c5c r5:81ed8f0c r4:84b07c00 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:850ca300 r6:85089c00 r5:81ed8f0c r4:84b07c00 [<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 r4:8537d414 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:8537d400 r5:813b68b8 r4:85089c00 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:85089c00 r6:8532e400 r5:823bfe4c r4:85089c00 [<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 r8:8532e400 r7:0000001c r6:85089c00 r5:ee2b1f38 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:ee2b1ddc r9:00000000 r8:00000000 r7:00000000 r6:83645680 r5:83645680 r4:ee2b1f38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:ee2b1f38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:8516dc00 r8:00000000 r7:00000000 r6:83645680 r5:ee2b1f38 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 r4:83645680 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xee2b1fa8 to 0xee2b1ff0) 1fa0: 00000000 00000000 00000006 20000140 00000000 00000000 1fc0: 00000000 00000000 0014c2c0 00000128 7ec913d2 76b0c6d0 7ec91544 76b0c20c 1fe0: 76b0c020 76b0c010 000164dc 0004d5a0 r6:0014c2c0 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