netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. loop4: detected capacity change from 0 to 2048 general protection fault, probably for non-canonical address 0xdffffc0004000020: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000000020000100-0x0000000020000107] CPU: 1 PID: 4225 Comm: syz-executor.2 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_write+0x477/0x700 Code: 00 0f 85 fd 01 00 00 4d 8b 7c 24 28 e8 d2 05 c6 ff 48 8b 44 24 18 80 38 00 0f 85 68 01 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 3b 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff88803fce7c70 EFLAGS: 00010212 RAX: 0000000020000100 RBX: ffff88803fce7d60 RCX: ffffc900015ca000 RDX: 0000000004000020 RSI: ffffffff8185830e RDI: 0000000000000007 RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800ddc9680 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491cda0 FS: 00007feec3db6700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c321000 CR3: 00000000158c2000 CR4: 0000000000350ee0 Call Trace: vfs_writev+0x1ae/0x660 __x64_sys_pwritev+0x233/0x310 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7feec6840b19 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:00007feec3db6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 00007feec6953f60 RCX: 00007feec6840b19 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007feec689af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce9ec073f R14: 00007feec3db6300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_write+0x477/0x700 Code: 00 0f 85 fd 01 00 00 4d 8b 7c 24 28 e8 d2 05 c6 ff 48 8b 44 24 18 80 38 00 0f 85 68 01 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 3b 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff88803fce7c70 EFLAGS: 00010212 RAX: 0000000020000100 RBX: ffff88803fce7d60 RCX: ffffc900015ca000 RDX: 0000000004000020 RSI: ffffffff8185830e RDI: 0000000000000007 RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800ddc9680 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491cda0 FS: 00007feec3db6700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c321000 CR3: 00000000158c2000 CR4: 0000000000350ee0 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 2048 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 2048 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 40 loop4: detected capacity change from 0 to 2048 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. loop1: detected capacity change from 0 to 40 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. syz-executor.7: attempt to access beyond end of device loop7: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, lost async page write EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. syz-executor.1: attempt to access beyond end of device loop1: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop1, logical block 10, lost async page write random: crng reseeded on system resumption random: crng reseeded on system resumption loop7: detected capacity change from 0 to 40 audit: type=1326 audit(1679915634.181:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4333 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f8b0b1e1b19 code=0x0 random: crng reseeded on system resumption loop1: detected capacity change from 0 to 40 audit: type=1326 audit(1679915634.226:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4333 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f8b0b19472b code=0x0 syz-executor.7: attempt to access beyond end of device loop7: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, lost async page write loop6: detected capacity change from 0 to 40 random: crng reseeded on system resumption audit: type=1326 audit(1679915634.304:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4353 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f8b0b1e1b19 code=0x0 audit: type=1326 audit(1679915634.308:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4354 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7bbb7a7b19 code=0x0 audit: type=1326 audit(1679915634.354:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4353 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f8b0b19472b code=0x0 audit: type=1326 audit(1679915634.356:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4354 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f7bbb75a72b code=0x0 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 10, lost async page write syz-executor.1: attempt to access beyond end of device loop1: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop1, logical block 10, lost async page write audit: type=1326 audit(1679915634.537:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4367 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f8b0b1e1b19 code=0x0 loop6: detected capacity change from 0 to 40 random: crng reseeded on system resumption audit: type=1326 audit(1679915634.545:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4362 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7bbb7a7b19 code=0x0 loop7: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 audit: type=1326 audit(1679915634.589:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4367 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f8b0b19472b code=0x0 audit: type=1326 audit(1679915634.596:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4362 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f7bbb75a72b code=0x0 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 10, lost async page write syz-executor.1: attempt to access beyond end of device loop1: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop1, logical block 10, lost async page write syz-executor.7: attempt to access beyond end of device loop7: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, lost async page write random: crng reseeded on system resumption loop6: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 loop7: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 10, lost async page write random: crng reseeded on system resumption syz-executor.7: attempt to access beyond end of device loop7: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, lost async page write netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. random: crng reseeded on system resumption loop2: detected capacity change from 0 to 256 loop2: detected capacity change from 0 to 256 loop2: detected capacity change from 0 to 256 loop2: detected capacity change from 0 to 256 ---------------- Code disassembly (best guess): 0: 00 0f add %cl,(%rdi) 2: 85 fd test %edi,%ebp 4: 01 00 add %eax,(%rax) 6: 00 4d 8b add %cl,-0x75(%rbp) 9: 7c 24 jl 0x2f b: 28 e8 sub %ch,%al d: d2 05 c6 ff 48 8b rolb %cl,-0x74b7003a(%rip) # 0x8b48ffd9 13: 44 24 18 rex.R and $0x18,%al 16: 80 38 00 cmpb $0x0,(%rax) 19: 0f 85 68 01 00 00 jne 0x187 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 3b 01 00 00 jne 0x170 35: 48 8b 4c 24 20 mov 0x20(%rsp),%rcx 3a: 48 8b 30 mov (%rax),%rsi 3d: 80 39 00 cmpb $0x0,(%rcx)