audit: type=1400 audit(1679920663.415:12): avc: denied { read } for pid=4343 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 general protection fault, probably for non-canonical address 0xdffffc0004000300: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000000020001800-0x0000000020001807] CPU: 0 PID: 4348 Comm: syz-executor.4 Not tainted 6.3.0-rc3-next-20230327 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888044d0fc30 EFLAGS: 00010216 RAX: 0000000020001800 RBX: ffff888044d0fd18 RCX: ffffc900043e9000 RDX: 0000000004000300 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000000083 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000083 R11: 0000000000000001 R12: ffff88801a4ebb80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff84a7a880 FS: 00007f3a96ccf700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000280 CR3: 000000000d51c000 CR4: 0000000000350ef0 Call Trace: vfs_readv+0xe5/0x160 do_preadv+0x1ba/0x270 __x64_sys_preadv2+0xef/0x160 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f3a9977ab19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3a96ccf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000147 RAX: ffffffffffffffda RBX: 00007f3a9988e020 RCX: 00007f3a9977ab19 RDX: 0000000000000001 RSI: 00000000200018c0 RDI: 000000000000000a RBP: 00007f3a997d4f6d R08: 0000000000000081 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdc676695f R14: 00007f3a96ccf300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888044d0fc30 EFLAGS: 00010216 RAX: 0000000020001800 RBX: ffff888044d0fd18 RCX: ffffc900043e9000 RDX: 0000000004000300 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000000083 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000083 R11: 0000000000000001 R12: ffff88801a4ebb80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff84a7a880 FS: 00007f3a96ccf700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000280 CR3: 000000000d51c000 CR4: 0000000000350ef0 Bluetooth: hci7: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci7: Injecting HCI hardware error event Bluetooth: hci7: hardware error 0x00 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1326 audit(1679920665.566:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4387 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fca3fff3b19 code=0x0 loop0: detected capacity change from 0 to 40 loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 24 limit=40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 31, lost async page write audit: type=1326 audit(1679920666.396:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4387 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fca3fff3b19 code=0x0 audit: type=1326 audit(1679920666.496:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4406 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fca3fff3b19 code=0x0 loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 24 limit=40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 31, lost async page write loop2: detected capacity change from 0 to 40 loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 24 limit=40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 31, lost async page write syz-executor.2: attempt to access beyond end of device loop2: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop2, logical block 31, lost async page write syz-executor.2: attempt to access beyond end of device loop2: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop2, logical block 31, lost async page write loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 24 limit=40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 31, lost async page write Bluetooth: hci7: Opcode 0x c03 failed: -110 audit: type=1326 audit(1679920667.476:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4443 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fca3fff3b19 code=0x0 loop2: detected capacity change from 0 to 40 Buffer I/O error on dev loop2, logical block 31, lost async page write loop2: detected capacity change from 0 to 40 audit: type=1326 audit(1679920668.409:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4485 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fca3fff3b19 code=0x0 Buffer I/O error on dev loop2, logical block 31, lost async page write loop2: detected capacity change from 0 to 40 EXT4-fs (loop6): VFS: Can't find ext4 filesystem EXT4-fs (loop6): VFS: Can't find ext4 filesystem Buffer I/O error on dev loop2, logical block 31, lost async page write nfs: Bad value for 'fscontext' capability: warning: `syz-executor.0' uses 32-bit capabilities (legacy support in use) loop6: detected capacity change from 0 to 40 bio_check_eod: 3 callbacks suppressed syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 8 limit=40 9pnet: Could not find request transport: xen 9pnet: Could not find request transport: xen loop2: detected capacity change from 0 to 40 loop6: detected capacity change from 0 to 40 syz-executor.2: attempt to access beyond end of device loop2: rw=2049, sector=100, nr_sectors = 8 limit=40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 8 limit=40 loop6: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 8 limit=40 syz-executor.2: attempt to access beyond end of device loop2: rw=2049, sector=100, nr_sectors = 8 limit=40 loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=100, nr_sectors = 8 limit=40 loop2: detected capacity change from 0 to 40 syz-executor.2: attempt to access beyond end of device loop2: rw=2049, sector=100, nr_sectors = 8 limit=40 loop2: detected capacity change from 0 to 16383 ---------------- Code disassembly (best guess): 0: 00 0f add %cl,(%rdi) 2: 85 52 02 test %edx,0x2(%rdx) 5: 00 00 add %al,(%rax) 7: 4d 8b 7c 24 28 mov 0x28(%r12),%r15 c: e8 48 2c c6 ff callq 0xffc62c59 11: 48 8b 44 24 18 mov 0x18(%rsp),%rax 16: 80 38 00 cmpb $0x0,(%rax) 19: 0f 85 1c 02 00 00 jne 0x23b 1f: 48 8b 43 18 mov 0x18(%rbx),%rax 23: 48 89 c2 mov %rax,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 42 80 3c 32 00 cmpb $0x0,(%rdx,%r14,1) <-- trapping instruction 2f: 0f 85 ef 01 00 00 jne 0x224 35: 48 8b 4c 24 20 mov 0x20(%rsp),%rcx 3a: 48 8b 30 mov (%rax),%rsi 3d: 80 39 00 cmpb $0x0,(%rcx)