syzkaller login: [ 36.170542] BUG: Bad rss-counter state mm:000000005cae079c type:MM_FILEPAGES val:33 [ 36.171573] BUG: Bad rss-counter state mm:000000005cae079c type:MM_ANONPAGES val:22 [ 36.382091] ================================================================== [ 36.383050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.383992] Read of size 8 at addr ffff88800e420ed8 by task sshd/223 [ 36.384759] [ 36.384981] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.386024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.387043] Call Trace: [ 36.387377] [ 36.387659] dump_stack_lvl+0x91/0xf0 [ 36.388186] print_report+0xcc/0x620 [ 36.388694] ? __virt_addr_valid+0x102/0x340 [ 36.389265] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.389898] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.390558] kasan_report+0xbe/0xf0 [ 36.391044] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.391670] vma_interval_tree_remove+0xc75/0xec0 [ 36.392278] vma_prepare+0xc54/0x11a0 [ 36.392767] __split_vma+0x5af/0x950 [ 36.393252] ? __pfx___split_vma+0x10/0x10 [ 36.393791] ? find_held_lock+0x2c/0x110 [ 36.394316] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.394924] ? lock_is_held_type+0x9f/0x120 [ 36.395469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.396089] ? mtree_range_walk+0x632/0x900 [ 36.396658] ? mas_walk+0x5c7/0x7c0 [ 36.397150] do_vmi_munmap+0x1f1/0x2b0 [ 36.397651] mmap_region+0x1f9/0x2660 [ 36.398135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.398670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.399382] ? __pfx_lock_acquire+0x10/0x10 [ 36.399923] ? __pfx_mmap_region+0x10/0x10 [ 36.400454] ? security_mmap_addr+0x7d/0xa0 [ 36.400996] ? get_unmapped_area+0x1f5/0x3f0 [ 36.401550] do_mmap+0x854/0xf00 [ 36.401997] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.402495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.403066] ksys_mmap_pgoff+0x3af/0x500 [ 36.403582] do_syscall_64+0x3f/0x90 [ 36.404074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.404721] RIP: 0033:0x7f1ee543dd82 [ 36.405184] 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 [ 36.407370] RSP: 002b:00007fff4eaa48a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.408288] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ee543dd82 [ 36.409154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ee4877000 [ 36.410003] RBP: 00007f1ee4877000 R08: 0000000000000009 R09: 0000000000001000 [ 36.410877] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2b3367f70 [ 36.411747] R13: 00007fff4eaa48c0 R14: 00007fff4eaa48f0 R15: 00007fff4eaa4c50 [ 36.412624] [ 36.412922] [ 36.413145] Allocated by task 213: [ 36.413585] kasan_save_stack+0x22/0x50 [ 36.414088] kasan_set_track+0x25/0x30 [ 36.414590] __kasan_slab_alloc+0x59/0x70 [ 36.415132] kmem_cache_alloc+0x16b/0x370 [ 36.415654] vm_area_dup+0x20/0x160 [ 36.416115] __split_vma+0x170/0x950 [ 36.416597] split_vma+0xc6/0x110 [ 36.417042] mprotect_fixup+0x8d2/0xb30 [ 36.417542] do_mprotect_pkey+0x87e/0xd40 [ 36.418077] __x64_sys_mprotect+0x78/0xc0 [ 36.418627] do_syscall_64+0x3f/0x90 [ 36.419100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.419751] [ 36.419965] Freed by task 204: [ 36.420371] kasan_save_stack+0x22/0x50 [ 36.420879] kasan_set_track+0x25/0x30 [ 36.421385] kasan_save_free_info+0x2b/0x50 [ 36.421925] __kasan_slab_free+0x10a/0x190 [ 36.422474] kmem_cache_free+0x10d/0x4d0 [ 36.423000] rcu_core+0x8c8/0x2860 [ 36.423458] __do_softirq+0x1b7/0x7d4 [ 36.423940] [ 36.424159] Last potentially related work creation: [ 36.424760] kasan_save_stack+0x22/0x50 [ 36.425271] __kasan_record_aux_stack+0x8e/0xa0 [ 36.425868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.426540] remove_vma+0x139/0x170 [ 36.427080] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.427654] do_vmi_munmap+0x1f1/0x2b0 [ 36.428144] __vm_munmap+0x138/0x3a0 [ 36.428622] __x64_sys_munmap+0x59/0x80 [ 36.429128] do_syscall_64+0x3f/0x90 [ 36.429618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.430270] [ 36.430486] Second to last potentially related work creation: [ 36.431183] kasan_save_stack+0x22/0x50 [ 36.431703] __kasan_record_aux_stack+0x8e/0xa0 [ 36.432288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.432949] remove_vma+0x139/0x170 [ 36.433404] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.433973] do_vmi_munmap+0x1f1/0x2b0 [ 36.434465] mmap_region+0x1f9/0x2660 [ 36.434960] do_mmap+0x854/0xf00 [ 36.435394] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.435888] ksys_mmap_pgoff+0x3af/0x500 [ 36.436392] do_syscall_64+0x3f/0x90 [ 36.436869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.437524] [ 36.437742] The buggy address belongs to the object at ffff88800e420e80 [ 36.437742] which belongs to the cache vm_area_struct of size 168 [ 36.439234] The buggy address is located 88 bytes inside of [ 36.439234] freed 168-byte region [ffff88800e420e80, ffff88800e420f28) [ 36.440659] [ 36.440882] The buggy address belongs to the physical page: [ 36.441541] page:00000000547b3388 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe420 [ 36.442647] memcg:ffff88800ea6f801 [ 36.443079] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.443786] page_type: 0xffffffff() [ 36.444241] raw: 0100000000000200 ffff88800879fc80 ffffea0000384500 dead000000000007 [ 36.445171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea6f801 [ 36.446080] page dumped because: kasan: bad access detected [ 36.446761] [ 36.446983] Memory state around the buggy address: [ 36.447558] ffff88800e420d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.448410] ffff88800e420e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.449266] >ffff88800e420e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.450115] ^ [ 36.450847] ffff88800e420f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.451717] ffff88800e420f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.452591] ================================================================== [ 36.453637] Disabling lock debugging due to kernel taint [ 38.799710] BUG: Bad rss-counter state mm:0000000022de999c type:MM_FILEPAGES val:33 [ 38.801112] BUG: Bad rss-counter state mm:0000000022de999c type:MM_ANONPAGES val:22 [ 39.233436] BUG: Bad rss-counter state mm:00000000f17f02bc type:MM_FILEPAGES val:33 [ 39.234626] BUG: Bad rss-counter state mm:00000000f17f02bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55398' (ECDSA) to the list of known hosts. 2023/06/19 21:49:54 fuzzer started 2023/06/19 21:49:54 dialing manager at localhost:44161 2023/06/19 21:49:54 checking machine... 2023/06/19 21:49:54 checking revisions... [ 39.986491] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:49:54 testing simple program... [ 40.034713] cgroup: Unknown subsys name 'net' [ 40.082073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:46 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff818a7d3e RDX=ffff8880159251c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801ca57ac8 RSP=ffff88801ca57a80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88801ca57b20 R13=0000000000000041 R14=ffffed100394af6b R15=ffffed100394af6e RIP=ffffffff814c07eb 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 00007f8f8657e900 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=00007f8f86b33650 CR3=000000000f0b4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c26fba RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86137dd6 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09dd8 R15=ffff88806cf09a78 RIP=ffffffff81130b73 RFL=00000212 [----A--] 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 0000000000000000 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=00007f31b20e7ef0 CR3=000000000c9a8000 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=00000000000000000000000000000000 XMM01=75feed08966958ae6b43d1168bda3048 XMM02=000000000011c950eff9b2d0a8fce9cb XMM03=000000000011ca202c67c8bc2e329bc3 XMM04=4f937893eac2fcd500000000000ae988 XMM05=e4cb8bb95a7664b600000000001350e0 XMM06=fdd07e89e419f4170000000000133f48 XMM07=e042d86d42eb936e0000000000123db8 XMM08=04857c537129cc36000000000011ca20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000