syzkaller login: [ 35.465190] BUG: Bad rss-counter state mm:000000003da4a197 type:MM_FILEPAGES val:33 [ 35.466229] BUG: Bad rss-counter state mm:000000003da4a197 type:MM_ANONPAGES val:22 [ 35.643152] ================================================================== [ 35.644292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.645274] Read of size 8 at addr ffff88800d516968 by task sshd/220 [ 35.646228] [ 35.646455] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.647316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.648338] Call Trace: [ 35.648662] [ 35.648952] dump_stack_lvl+0x91/0xf0 [ 35.649450] print_report+0xcc/0x620 [ 35.649939] ? __virt_addr_valid+0x102/0x340 [ 35.650499] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.651113] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.651734] kasan_report+0xbe/0xf0 [ 35.652220] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.652843] vma_interval_tree_remove+0xc75/0xec0 [ 35.653445] vma_prepare+0xc54/0x11a0 [ 35.653929] __split_vma+0x5af/0x950 [ 35.654401] ? __pfx___split_vma+0x10/0x10 [ 35.654926] ? find_held_lock+0x2c/0x110 [ 35.655451] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.656014] ? lock_is_held_type+0x9f/0x120 [ 35.656575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.657180] ? mtree_range_walk+0x632/0x900 [ 35.657730] ? mas_walk+0x5c7/0x7c0 [ 35.658202] do_vmi_munmap+0x1f1/0x2b0 [ 35.658692] mmap_region+0x1f9/0x2660 [ 35.659175] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.659682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.660409] ? __pfx_lock_acquire+0x10/0x10 [ 35.660945] ? __pfx_mmap_region+0x10/0x10 [ 35.661493] ? security_mmap_addr+0x7d/0xa0 [ 35.662032] ? get_unmapped_area+0x1f5/0x3f0 [ 35.662586] do_mmap+0x854/0xf00 [ 35.663039] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.663534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.664097] ksys_mmap_pgoff+0x3af/0x500 [ 35.664626] do_syscall_64+0x3f/0x90 [ 35.665109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.665755] RIP: 0033:0x7f50797b9d82 [ 35.666212] 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 [ 35.668465] RSP: 002b:00007ffed1c0c9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.669423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50797b9d82 [ 35.670317] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5078bf3000 [ 35.671208] RBP: 00007f5078bf3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.672098] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596a32b2ec0 [ 35.672999] R13: 00007ffed1c0c9f0 R14: 00007ffed1c0ca20 R15: 00007ffed1c0cd80 [ 35.673914] [ 35.674215] [ 35.674440] Allocated by task 213: [ 35.674886] kasan_save_stack+0x22/0x50 [ 35.675413] kasan_set_track+0x25/0x30 [ 35.675941] __kasan_slab_alloc+0x59/0x70 [ 35.676496] kmem_cache_alloc+0x16b/0x370 [ 35.677037] vm_area_dup+0x20/0x160 [ 35.677513] __split_vma+0x170/0x950 [ 35.678006] split_vma+0xc6/0x110 [ 35.678471] mprotect_fixup+0x8d2/0xb30 [ 35.679000] do_mprotect_pkey+0x87e/0xd40 [ 35.679547] __x64_sys_mprotect+0x78/0xc0 [ 35.680089] do_syscall_64+0x3f/0x90 [ 35.680619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.681302] [ 35.681546] Freed by task 19: [ 35.681955] kasan_save_stack+0x22/0x50 [ 35.682494] kasan_set_track+0x25/0x30 [ 35.683020] kasan_save_free_info+0x2b/0x50 [ 35.683577] __kasan_slab_free+0x10a/0x190 [ 35.684137] kmem_cache_free+0x10d/0x4d0 [ 35.684683] rcu_core+0x8c8/0x2860 [ 35.685138] __do_softirq+0x1b7/0x7d4 [ 35.685622] [ 35.685836] Last potentially related work creation: [ 35.686473] kasan_save_stack+0x22/0x50 [ 35.686979] __kasan_record_aux_stack+0x8e/0xa0 [ 35.687670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.688346] remove_vma+0x139/0x170 [ 35.688801] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.689359] do_vmi_munmap+0x1f1/0x2b0 [ 35.689859] __vm_munmap+0x138/0x3a0 [ 35.690334] __x64_sys_munmap+0x59/0x80 [ 35.690838] do_syscall_64+0x3f/0x90 [ 35.691321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.691973] [ 35.692192] Second to last potentially related work creation: [ 35.692900] kasan_save_stack+0x22/0x50 [ 35.693413] __kasan_record_aux_stack+0x8e/0xa0 [ 35.693999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.694638] remove_vma+0x139/0x170 [ 35.695142] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.695711] do_vmi_munmap+0x1f1/0x2b0 [ 35.696207] mmap_region+0x1f9/0x2660 [ 35.696710] do_mmap+0x854/0xf00 [ 35.697155] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.697652] ksys_mmap_pgoff+0x3af/0x500 [ 35.698168] do_syscall_64+0x3f/0x90 [ 35.698657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.699312] [ 35.699536] The buggy address belongs to the object at ffff88800d516910 [ 35.699536] which belongs to the cache vm_area_struct of size 168 [ 35.701025] The buggy address is located 88 bytes inside of [ 35.701025] freed 168-byte region [ffff88800d516910, ffff88800d5169b8) [ 35.702449] [ 35.702663] The buggy address belongs to the physical page: [ 35.703323] page:0000000018e3bfea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd516 [ 35.704470] memcg:ffff88800e15f401 [ 35.704920] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.705656] page_type: 0xffffffff() [ 35.706132] raw: 0100000000000200 ffff8880087a0c80 ffffea00003753c0 dead000000000007 [ 35.707110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e15f401 [ 35.708064] page dumped because: kasan: bad access detected [ 35.708768] [ 35.708990] Memory state around the buggy address: [ 35.709601] ffff88800d516800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.710510] ffff88800d516880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.711414] >ffff88800d516900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.712318] ^ [ 35.713145] ffff88800d516980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.714041] ffff88800d516a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.714935] ================================================================== [ 35.716016] Disabling lock debugging due to kernel taint [ 38.309757] BUG: Bad rss-counter state mm:0000000079b2b501 type:MM_FILEPAGES val:33 [ 38.310816] BUG: Bad rss-counter state mm:0000000079b2b501 type:MM_ANONPAGES val:22 [ 38.838068] BUG: Bad rss-counter state mm:000000008c6c94d2 type:MM_FILEPAGES val:32 [ 38.839160] BUG: Bad rss-counter state mm:000000008c6c94d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17780' (ECDSA) to the list of known hosts. 2023/06/20 18:43:03 fuzzer started 2023/06/20 18:43:04 dialing manager at localhost:36067 2023/06/20 18:43:04 checking machine... 2023/06/20 18:43:04 checking revisions... [ 39.530626] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:43:04 testing simple program... [ 39.592542] cgroup: Unknown subsys name 'net' [ 39.643637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:03 Registers: info registers vcpu 0 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff888015cbfd28 RSP=ffff888015cbfc60 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000ee R11=0000000000000000 R12=0000000000000015 R13=ffff888015cbfd60 R14=0000000000000015 R15=ffffc9000068d6f0 RIP=ffffffff815a72aa RFL=00000246 [---Z-P-] 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 00007f0eb5984900 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=00007f0eb4dc2890 CR3=0000000013a6a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=deecff1480d4f10000000000000ae988 XMM05=a7b0a400007d4dd20000000000133a70 XMM06=66aec74febd33dc500000000001327a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88800d8dae40 RCX=ffffffff81846775 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800d8daed0 RBP=ffff8880190afac8 RSP=ffff8880190afa88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008fae000 R13=ffffea00005b2a80 R14=ffffffff8366b8df R15=0000000000000001 RIP=ffffffff8180fed8 RFL=00000282 [--S----] 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 00007f3e08823900 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=00007ffef1a8a000 CR3=0000000016c48000 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