syzkaller login: [ 44.992462] BUG: Bad rss-counter state mm:000000003186064a type:MM_FILEPAGES val:33 [ 44.993178] BUG: Bad rss-counter state mm:000000003186064a type:MM_ANONPAGES val:22 [ 45.119900] ================================================================== [ 45.120561] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.121247] Read of size 8 at addr ffff888009792228 by task sshd/218 [ 45.121798] [ 45.121966] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.122595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.123315] Call Trace: [ 45.123546] [ 45.123756] dump_stack_lvl+0x91/0xf0 [ 45.124214] print_report+0xcc/0x620 [ 45.124583] ? __virt_addr_valid+0x102/0x340 [ 45.124986] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.125438] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.125904] kasan_report+0xbe/0xf0 [ 45.126253] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.126720] vma_interval_tree_remove+0xc75/0xec0 [ 45.127161] vma_prepare+0xc54/0x11a0 [ 45.127508] __split_vma+0x5af/0x950 [ 45.127853] ? __pfx___split_vma+0x10/0x10 [ 45.128238] ? find_held_lock+0x2c/0x110 [ 45.128620] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.129038] ? lock_is_held_type+0x9f/0x120 [ 45.129431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.129884] ? mtree_range_walk+0x632/0x900 [ 45.130287] ? mas_walk+0x5c7/0x7c0 [ 45.130632] do_vmi_munmap+0x1f1/0x2b0 [ 45.131002] mmap_region+0x1f9/0x2660 [ 45.131356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.131728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.132249] ? __pfx_lock_acquire+0x10/0x10 [ 45.132638] ? __pfx_mmap_region+0x10/0x10 [ 45.133021] ? security_mmap_addr+0x7d/0xa0 [ 45.133411] ? get_unmapped_area+0x1f5/0x3f0 [ 45.133815] do_mmap+0x854/0xf00 [ 45.134156] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.134531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.134945] ksys_mmap_pgoff+0x3af/0x500 [ 45.135316] do_syscall_64+0x3f/0x90 [ 45.135673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.136151] RIP: 0033:0x7f6aa443fd82 [ 45.136484] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 45.138062] RSP: 002b:00007ffdef80cd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.138723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6aa443fd82 [ 45.139346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6aa3879000 [ 45.139975] RBP: 00007f6aa3879000 R08: 0000000000000009 R09: 0000000000001000 [ 45.140600] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622ab883ec0 [ 45.141219] R13: 00007ffdef80cd70 R14: 00007ffdef80cda0 R15: 00007ffdef80d100 [ 45.141861] [ 45.142077] [ 45.142232] Allocated by task 211: [ 45.142555] kasan_save_stack+0x22/0x50 [ 45.142925] kasan_set_track+0x25/0x30 [ 45.143294] __kasan_slab_alloc+0x59/0x70 [ 45.143681] kmem_cache_alloc+0x16b/0x370 [ 45.144056] vm_area_dup+0x20/0x160 [ 45.144388] __split_vma+0x170/0x950 [ 45.144730] split_vma+0xc6/0x110 [ 45.145056] mprotect_fixup+0x8d2/0xb30 [ 45.145420] do_mprotect_pkey+0x87e/0xd40 [ 45.145807] __x64_sys_mprotect+0x78/0xc0 [ 45.146193] do_syscall_64+0x3f/0x90 [ 45.146544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.147021] [ 45.147175] Freed by task 0: [ 45.147454] kasan_save_stack+0x22/0x50 [ 45.147823] kasan_set_track+0x25/0x30 [ 45.148184] kasan_save_free_info+0x2b/0x50 [ 45.148575] __kasan_slab_free+0x10a/0x190 [ 45.148975] kmem_cache_free+0x10d/0x4d0 [ 45.149346] rcu_core+0x8c8/0x2860 [ 45.149683] __do_softirq+0x1b7/0x7d4 [ 45.150037] [ 45.150199] Last potentially related work creation: [ 45.150629] kasan_save_stack+0x22/0x50 [ 45.151003] __kasan_record_aux_stack+0x8e/0xa0 [ 45.151424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.151908] remove_vma+0x139/0x170 [ 45.152237] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.152652] do_vmi_munmap+0x1f1/0x2b0 [ 45.153011] __vm_munmap+0x138/0x3a0 [ 45.153347] __x64_sys_munmap+0x59/0x80 [ 45.153718] do_syscall_64+0x3f/0x90 [ 45.154078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.154547] [ 45.154701] Second to last potentially related work creation: [ 45.155211] kasan_save_stack+0x22/0x50 [ 45.155584] __kasan_record_aux_stack+0x8e/0xa0 [ 45.156007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.156481] remove_vma+0x139/0x170 [ 45.156810] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.157220] do_vmi_munmap+0x1f1/0x2b0 [ 45.157575] mmap_region+0x1f9/0x2660 [ 45.157930] do_mmap+0x854/0xf00 [ 45.158246] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.158607] ksys_mmap_pgoff+0x3af/0x500 [ 45.158978] do_syscall_64+0x3f/0x90 [ 45.159322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.159797] [ 45.159957] The buggy address belongs to the object at ffff8880097921d0 [ 45.159957] which belongs to the cache vm_area_struct of size 168 [ 45.161044] The buggy address is located 88 bytes inside of [ 45.161044] freed 168-byte region [ffff8880097921d0, ffff888009792278) [ 45.162095] [ 45.162252] The buggy address belongs to the physical page: [ 45.162744] page:00000000fb1f96dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9792 [ 45.163547] memcg:ffff88800986c501 [ 45.163861] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.164342] page_type: 0xffffffff() [ 45.164674] raw: 0100000000000200 ffff88800879fc80 ffffea00003c6940 dead000000000004 [ 45.165350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800986c501 [ 45.166025] page dumped because: kasan: bad access detected [ 45.166513] [ 45.166673] Memory state around the buggy address: [ 45.167095] ffff888009792100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.167715] ffff888009792180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 45.168346] >ffff888009792200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 45.168975] ^ [ 45.169385] ffff888009792280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 45.170024] ffff888009792300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 45.170646] ================================================================== [ 45.171338] Disabling lock debugging due to kernel taint [ 46.525078] BUG: Bad rss-counter state mm:000000003c677eba type:MM_FILEPAGES val:33 [ 46.525854] BUG: Bad rss-counter state mm:000000003c677eba type:MM_ANONPAGES val:22 [ 46.970749] BUG: Bad rss-counter state mm:000000002a81c53c type:MM_FILEPAGES val:33 [ 46.971557] BUG: Bad rss-counter state mm:000000002a81c53c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36051' (ECDSA) to the list of known hosts. 2023/06/19 16:40:12 fuzzer started 2023/06/19 16:40:12 dialing manager at localhost:44161 2023/06/19 16:40:12 checking machine... 2023/06/19 16:40:12 checking revisions... [ 47.612286] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:40:12 testing simple program... [ 47.649316] cgroup: Unknown subsys name 'net' [ 47.687089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:40:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd99653e398 CR3=000000000c7b6000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=7767a4f0b7bfc791704028d9fe09f8f9 XMM02=000000000011dad8eff9b2d0a8fce9cb XMM03=000000000011dba82c67c8bc2e329bc3 XMM04=d988290ad6b5749d00000000000ae988 XMM05=2e406226c8ecb8320000000000136640 XMM06=bdf2e299e47b49d50000000000135118 XMM07=fb795ef6d657705600000000001244e8 XMM08=2c67c8bc2e329bc3000000000011db48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613dd35 RBX=0000000000000001 RCX=ffffffff8613dd30 RDX=0000000000000000 RSI=1ffffffff0c27ba6 RDI=ffffffff85e00f6c RBP=ffff888016eb7ae8 RSP=ffff888016eb7a20 R8 =ffffffff8613dd30 R9 =ffff888016eb7ad0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff888016eb7af0 R13=ffff888016eb7ad8 R14=ffff888016eb7ad1 R15=ffff888016eb7a90 RIP=ffffffff81130a5b RFL=00000217 [----APC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1f02fdb900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=0000557a92f3f954 CR3=000000000dd78000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000