8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=852ed003, *pmd=fe762003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 6874 Comm: syz-executor.1 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: 60000193 sp : ee1cdac8 ip : 82c00024 fp : ee1cdb0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 85347800 r4 : 8516105c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85233500 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 85161000 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 85347800 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 0xee1cc000 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: 6874, stack limit = 0xee1cc000) Stack: (0xee1cdac8 to 0xee1ce000) dac0: 80275518 802a0f18 820a235c 83d5b980 00000006 00000000 dae0: 80000113 8516105c 00000008 85347800 60000113 ee1cdb63 8250f9c0 85034974 db00: ee1cdb2c ee1cdb10 80260b0c 8026037c 84b89240 85161000 00000000 00000001 db20: ee1cdb5c ee1cdb30 816cb278 80260ac8 8167bbd0 ee1cdbbc ee1cdba8 85161000 db40: 851610d8 000001f4 816cb2f8 00000000 ee1cdb74 ee1cdb60 816cb32c 816cb1d4 db60: 01275518 1d726c23 ee1cdb94 ee1cdb78 816c9eb8 816cb304 85161000 81ed8f0c db80: 85161018 851610c4 ee1cdbbc ee1cdb98 816ca530 816c9e90 ee1cdbbc 1d726c23 dba0: 85035400 81ed8f0c 8503545c 851e0180 ee1cdbdc ee1cdbc0 816be830 816ca424 dbc0: 85035400 81ed8f0c 84b8a000 851e0180 ee1cdbf4 ee1cdbe0 816bfe24 816be7c8 dbe0: 85346e14 81ed8f0c ee1cdc9c ee1cdbf8 813b6a80 816bfe00 00000001 61c88647 dc00: 85347000 824e1244 00000013 84b8a000 ee1cdc34 ee1cdc20 ee1cdc34 ee1cdc28 dc20: 817622b4 802745b4 ee1cdc94 ee1cdc38 816bfdf4 00000000 00000000 00000000 dc40: 81a4d3a0 0000001f 03010002 00000000 f151a5d9 85346e00 85346e10 85346e14 dc60: 851e0180 8250f9c0 00000000 00000000 ee1cdca4 1d726c23 84b8a000 813b68b8 dc80: 85346e00 0000001c 82210b94 00000000 ee1cdcec ee1cdca0 813b5b6c 813b68c4 dca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dcc0: 00000000 00000000 00000000 1d726c23 84b8a000 823bfe4c 85034800 84b8a000 dce0: ee1cdd04 ee1cdcf0 813b63dc 813b5ab4 82930000 82930064 ee1cdd44 ee1cdd08 dd00: 813b50a8 813b63bc 85034800 0000001c 7fffffff 1d726c23 ee1cdd44 0000001c dd20: ee1cdf38 84b8a000 0000001c 85034800 00000000 00000000 ee1cdda4 ee1cdd48 dd40: 813b53f0 813b4e60 00000000 00000000 85346e00 00000000 00000000 84167e00 dd60: 00000000 000005bb 00000000 00000000 00000000 1d726c23 ee1cdda4 ee1cdf38 dd80: 8466c280 8466c280 00000000 00000000 00000000 ee1cdddc ee1cddbc ee1cdda8 dda0: 8128ff6c 813b51e8 ee1cdf38 00000000 ee1cde2c ee1cddc0 81290d50 8128ff3c ddc0: 80795b6c 807959e8 ee1cde38 ee1cdf48 00000000 00000000 ee1cde2c ee1cdde8 dde0: 8129295c 80795b4c ee1cde38 ee1cdf48 00000000 00000000 20000180 1d726c23 de00: 00000000 00000000 ee1cdf38 8466c280 00000000 00000000 83d5b980 00000128 de20: ee1cdf24 ee1cde30 81292a04 81290b50 00000000 8175a274 00000000 200001c0 de40: 0000001c 83d5b980 ee1cdf24 ee1cde58 80300518 802fc984 ee1cde6c 00000000 de60: 802fab54 83d5b980 01801c7f 828fba80 00002a80 00000000 00000000 00000000 de80: 00000000 ee1cdee0 ee1cded4 ee1cde98 802fbfd8 80811368 820a886c 00000006 dea0: 8220c940 1d726c23 00000064 ee1cdeac ee1cdef4 ee1cdec0 802fab54 810b235c dec0: ee1cdefc ee1cded0 804cbfe8 802ce8a8 00000000 ee1cdf34 ee1cdf30 00000000 dee0: 00000128 80200288 83d5b980 00000128 ee1cdf0c ee1cdf00 804cc05c 1d726c23 df00: ee1cdf24 8466c280 20000140 00000000 00000128 80200288 ee1cdfa4 ee1cdf28 df20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 df40: ee1cdf5c ee1cdf50 01010000 00000000 00000000 ee1cde44 00000000 00000000 df60: 00000000 00000001 00000000 00000000 00000000 00000000 ee1cdf9c ee1cdf88 df80: 803ecf68 1d726c23 00000000 00000000 00000000 0014c2c0 00000000 ee1cdfa8 dfa0: 80200060 81292e0c 00000000 00000000 00000007 20000140 00000000 00000000 dfc0: 00000000 00000000 0014c2c0 00000128 7efa23d2 76ae36d0 7efa2544 76ae320c dfe0: 76ae3020 76ae3010 000164dc 0004d5a0 60000010 00000007 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:85034974 r9:8250f9c0 r8:ee1cdb63 r7:60000113 r6:85347800 r5:00000008 r4:8516105c [<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 r5:85161000 r4:84b89240 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:851610d8 r4:85161000 [<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) r7:851610c4 r6:85161018 r5:81ed8f0c r4:85161000 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:851e0180 r6:8503545c r5:81ed8f0c r4:85035400 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:851e0180 r6:84b8a000 r5:81ed8f0c r4:85035400 [<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 r4:85346e14 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:85346e00 r5:813b68b8 r4:84b8a000 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:84b8a000 r6:85034800 r5:823bfe4c r4:84b8a000 [<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 r8:85034800 r7:0000001c r6:84b8a000 r5:ee1cdf38 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:ee1cdddc r9:00000000 r8:00000000 r7:00000000 r6:8466c280 r5:8466c280 r4:ee1cdf38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:ee1cdf38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:83d5b980 r8:00000000 r7:00000000 r6:8466c280 r5:ee1cdf38 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 r4:8466c280 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xee1cdfa8 to 0xee1cdff0) dfa0: 00000000 00000000 00000007 20000140 00000000 00000000 dfc0: 00000000 00000000 0014c2c0 00000128 7efa23d2 76ae36d0 7efa2544 76ae320c dfe0: 76ae3020 76ae3010 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