8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=853b7003, *pmd=e08ca003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 8587 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: 60000093 sp : edc49ac8 ip : 82c00024 fp : edc49b0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 8393a200 r4 : 83f7b05c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 852599c0 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 83f7b000 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 8393a200 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 0xedc48000 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: 8587, stack limit = 0xedc48000) Stack: (0xedc49ac8 to 0xedc4a000) 9ac0: 80275518 802a0f18 820a235c 833a2e00 00000038 00000001 9ae0: 80000013 83f7b05c 00000008 8393a200 60000013 edc49b63 8250f9c0 8559a174 9b00: edc49b2c edc49b10 80260b0c 8026037c 84386cc0 83f7b000 00000000 00000001 9b20: edc49b5c edc49b30 816cb278 80260ac8 00000000 00000000 83f7b000 83f7b000 9b40: 83f7b0d8 000001f4 816cb2f8 00000000 edc49b74 edc49b60 816cb32c 816cb1d4 9b60: 016c9eb8 501c2c17 edc49b94 edc49b78 816c9eb8 816cb304 83f7b000 81ed8f0c 9b80: 83f7b018 83f7b0c4 edc49bbc edc49b98 816ca530 816c9e90 edc49bbc 501c2c17 9ba0: 85598400 81ed8f0c 8559845c 853fb100 edc49bdc edc49bc0 816be830 816ca424 9bc0: 85598400 81ed8f0c 84386780 853fb100 edc49bf4 edc49be0 816bfe24 816be7c8 9be0: 853d1414 81ed8f0c edc49c9c edc49bf8 813b6a80 816bfe00 00000001 824484f8 9c00: edc49c1c edc49c10 817582ac 81758198 edc49c4c edc49c20 8027ae00 802745b4 9c20: ffedc000 833a2e00 00000001 501c2c17 816bfdf4 00000000 00000000 00000000 9c40: 81a4d3a0 0000001f 03010002 00000000 00007bfd 853d1400 853d1410 853d1414 9c60: 853fb100 8250f9c0 00000000 00000000 edc49ca4 501c2c17 84386780 813b68b8 9c80: 853d1400 0000001c 82210b94 00000000 edc49cec edc49ca0 813b5b6c 813b68c4 9ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9cc0: 00000000 00000000 00000000 501c2c17 84386780 823bfe4c 8559a000 84386780 9ce0: edc49d04 edc49cf0 813b63dc 813b5ab4 82930000 82930064 edc49d44 edc49d08 9d00: 813b50a8 813b63bc 8559a000 0000001c 7fffffff 501c2c17 edc49d44 0000001c 9d20: edc49f38 84386780 0000001c 8559a000 00000000 00000000 edc49da4 edc49d48 9d40: 813b53f0 813b4e60 00000000 00000000 853d1400 00000000 00000000 85308d00 9d60: 00000000 00007bfd 00000000 00000000 00000000 501c2c17 edc49da4 edc49f38 9d80: 859ddb80 859ddb80 00000000 00000000 00000000 edc49ddc edc49dbc edc49da8 9da0: 8128ff6c 813b51e8 edc49f38 00000000 edc49e2c edc49dc0 81290d50 8128ff3c 9dc0: 80795b6c 807959e8 edc49e38 edc49f48 00000000 00000000 edc49e2c edc49de8 9de0: 8129295c 80795b4c edc49e38 edc49f48 00000000 00000000 20000180 501c2c17 9e00: 00000000 00000000 edc49f38 859ddb80 00000000 00000000 833a2e00 00000128 9e20: edc49f24 edc49e30 81292a04 81290b50 00000000 802745b4 00000000 200001c0 9e40: 0000001c 501c2c17 edc49e64 ffedc000 833a2e00 00000001 edc49e84 edc49e68 9e60: 80435c40 8027ad54 833a2e00 769d6000 00000255 00000040 edc49f2c edc49e88 9e80: 8043c618 802745b4 e007975f 00e00000 00000000 00000000 edc49f14 e007975f 9ea0: 0000071f ffedc000 00e00000 deb7a104 edc49ef4 edc49ec0 802fab54 810b235c 9ec0: edc49efc edc49ed0 804cbfe8 802ce8a8 00000000 edc49f34 edc49f30 00000000 9ee0: 00000128 80200288 833a2e00 00000128 edc49f0c edc49f00 804cc05c 501c2c17 9f00: edc49f24 859ddb80 20000140 00000000 00000128 80200288 edc49fa4 edc49f28 9f20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 9f40: edc49f5c edc49f50 01010000 00000000 00000000 edc49e44 00000000 00000000 9f60: 00000000 00000001 00000000 00000000 00000000 00000000 edc49f9c edc49f88 9f80: 803ecf68 501c2c17 00000000 00000000 00000000 0014c500 00000000 edc49fa8 9fa0: 80200060 81292e0c 00000000 00000000 00000008 20000140 00000000 00000000 9fc0: 00000000 00000000 0014c500 00000128 7ebdb3d2 769d76d0 7ebdb544 769d720c 9fe0: 769d7020 769d7010 000164dc 0004d5a0 60000010 00000008 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:8559a174 r9:8250f9c0 r8:edc49b63 r7:60000013 r6:8393a200 r5:00000008 r4:83f7b05c [<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 r5:83f7b000 r4:84386cc0 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:83f7b0d8 r4:83f7b000 [<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) r7:83f7b0c4 r6:83f7b018 r5:81ed8f0c r4:83f7b000 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:853fb100 r6:8559845c r5:81ed8f0c r4:85598400 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:853fb100 r6:84386780 r5:81ed8f0c r4:85598400 [<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 r4:853d1414 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:853d1400 r5:813b68b8 r4:84386780 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:84386780 r6:8559a000 r5:823bfe4c r4:84386780 [<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 r8:8559a000 r7:0000001c r6:84386780 r5:edc49f38 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:edc49ddc r9:00000000 r8:00000000 r7:00000000 r6:859ddb80 r5:859ddb80 r4:edc49f38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:edc49f38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:833a2e00 r8:00000000 r7:00000000 r6:859ddb80 r5:edc49f38 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 r4:859ddb80 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xedc49fa8 to 0xedc49ff0) 9fa0: 00000000 00000000 00000008 20000140 00000000 00000000 9fc0: 00000000 00000000 0014c500 00000128 7ebdb3d2 769d76d0 7ebdb544 769d720c 9fe0: 769d7020 769d7010 000164dc 0004d5a0 r6:0014c500 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