Hello, syzbot found the following issue on: HEAD commit: 80bd9028feca Add linux-next specific files for 20230131 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17126969480000 kernel config: https://syzkaller.appspot.com/x/.config?x=904dc2f450eaad4a dashboard link: https://syzkaller.appspot.com/bug?extid=0bbf896c8341c8e137c2 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1534e75d480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/924618188238/disk-80bd9028.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7a03cf86e545/vmlinux-80bd9028.xz kernel image: https://storage.googleapis.com/syzbot-assets/568e80043a41/bzImage-80bd9028.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0bbf896c8341c8e137c2@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 5252 Comm: syz-executor.2 Not tainted 6.2.0-rc6-next-20230131-syzkaller-09515-g80bd9028feca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:sg_assign_page include/linux/scatterlist.h:109 [inline] RIP: 0010:sg_set_page include/linux/scatterlist.h:139 [inline] RIP: 0010:__blk_bvec_map_sg block/blk-merge.c:501 [inline] RIP: 0010:__blk_bios_map_sg block/blk-merge.c:548 [inline] RIP: 0010:__blk_rq_map_sg+0x36e/0xfd0 block/blk-merge.c:575 Code: 38 e8 36 5f 1a 00 48 89 c3 e8 9e 62 88 fd 48 8b 44 24 20 80 38 00 0f 85 fe 0b 00 00 48 8b 04 24 48 89 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f3 0b 00 00 4c 8b 74 24 30 31 ff 48 8b 2b 41 RSP: 0018:ffffc9000428edf8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888019293a80 RSI: ffffffff83fc5382 RDI: 0000000000000007 RBP: ffff888021114bb8 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000a00 FS: 00007f50df7a5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f50df784718 CR3: 0000000077767000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> scsi_alloc_sgtables+0x236/0xf70 drivers/scsi/scsi_lib.c:1048 sd_setup_read_write_cmnd drivers/scsi/sd.c:1136 [inline] sd_init_command+0x67a/0x32a0 drivers/scsi/sd.c:1260 scsi_prepare_cmd drivers/scsi/scsi_lib.c:1603 [inline] scsi_queue_rq+0x1e7b/0x3a40 drivers/scsi/scsi_lib.c:1737 blk_mq_dispatch_rq_list+0x710/0x23f0 block/blk-mq.c:2056 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline] blk_mq_do_dispatch_sched+0x95e/0xc20 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x26d/0x3e0 block/blk-mq-sched.c:313 blk_mq_sched_dispatch_requests+0x10a/0x190 block/blk-mq-sched.c:339 __blk_mq_run_hw_queue+0x2b7/0x480 block/blk-mq.c:2174 __blk_mq_delay_run_hw_queue+0x5f7/0x700 block/blk-mq.c:2250 blk_mq_run_hw_queue+0x3b5/0x560 block/blk-mq.c:2298 blk_mq_sched_insert_requests+0x1d9/0xb30 block/blk-mq-sched.c:493 blk_mq_dispatch_plug_list block/blk-mq.c:2758 [inline] blk_mq_flush_plug_list+0x39c/0xe10 block/blk-mq.c:2800 __blk_flush_plug block/blk-core.c:1150 [inline] blk_finish_plug block/blk-core.c:1174 [inline] blk_finish_plug+0xbb/0x170 block/blk-core.c:1171 __iomap_dio_rw+0xf85/0x1d80 fs/iomap/direct-io.c:602 iomap_dio_rw+0x40/0xa0 fs/iomap/direct-io.c:682 ext4_dio_read_iter fs/ext4/file.c:94 [inline] ext4_file_read_iter+0x4be/0x690 fs/ext4/file.c:145 call_read_iter include/linux/fs.h:1845 [inline] generic_file_splice_read+0x182/0x4b0 fs/splice.c:309 do_splice_to+0x1b9/0x240 fs/splice.c:793 splice_direct_to_actor+0x2ab/0x8a0 fs/splice.c:865 do_splice_direct+0x1ab/0x280 fs/splice.c:974 do_sendfile+0xb19/0x12c0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f50dea8c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f50df7a5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f50debabf80 RCX: 00007f50dea8c0c9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00007f50deae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001ff01 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffbb4e322f R14: 00007f50df7a5300 R15: 0000000000022000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:sg_assign_page include/linux/scatterlist.h:109 [inline] RIP: 0010:sg_set_page include/linux/scatterlist.h:139 [inline] RIP: 0010:__blk_bvec_map_sg block/blk-merge.c:501 [inline] RIP: 0010:__blk_bios_map_sg block/blk-merge.c:548 [inline] RIP: 0010:__blk_rq_map_sg+0x36e/0xfd0 block/blk-merge.c:575 Code: 38 e8 36 5f 1a 00 48 89 c3 e8 9e 62 88 fd 48 8b 44 24 20 80 38 00 0f 85 fe 0b 00 00 48 8b 04 24 48 89 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f3 0b 00 00 4c 8b 74 24 30 31 ff 48 8b 2b 41 RSP: 0018:ffffc9000428edf8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888019293a80 RSI: ffffffff83fc5382 RDI: 0000000000000007 RBP: ffff888021114bb8 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000a00 FS: 00007f50df7a5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdfee5f5d8 CR3: 0000000077767000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 38 e8 cmp %ch,%al 2: 36 5f ss pop %rdi 4: 1a 00 sbb (%rax),%al 6: 48 89 c3 mov %rax,%rbx 9: e8 9e 62 88 fd callq 0xfd8862ac e: 48 8b 44 24 20 mov 0x20(%rsp),%rax 13: 80 38 00 cmpb $0x0,(%rax) 16: 0f 85 fe 0b 00 00 jne 0xc1a 1c: 48 8b 04 24 mov (%rsp),%rax 20: 48 89 18 mov %rbx,(%rax) 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 0f 85 f3 0b 00 00 jne 0xc28 35: 4c 8b 74 24 30 mov 0x30(%rsp),%r14 3a: 31 ff xor %edi,%edi 3c: 48 8b 2b mov (%rbx),%rbp 3f: 41 rex.B --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
