syzkaller login: [ 31.756618] BUG: Bad rss-counter state mm:00000000a2c4ceac type:MM_FILEPAGES val:33 [ 31.757817] BUG: Bad rss-counter state mm:00000000a2c4ceac type:MM_ANONPAGES val:22 [ 31.797260] ================================================================== [ 31.798378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.799489] Read of size 8 at addr ffff88800b331798 by task sshd/219 [ 31.800292] [ 31.800529] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.801448] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.802477] Call Trace: [ 31.802826] [ 31.803125] dump_stack_lvl+0x91/0xf0 [ 31.803648] print_report+0xcc/0x620 [ 31.804157] ? __virt_addr_valid+0x102/0x340 [ 31.804738] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.805385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.806036] kasan_report+0xbe/0xf0 [ 31.806536] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.807217] vma_interval_tree_remove+0xc75/0xec0 [ 31.807852] vma_prepare+0xc54/0x11a0 [ 31.808368] __split_vma+0x5af/0x950 [ 31.808864] ? __pfx___split_vma+0x10/0x10 [ 31.809425] ? find_held_lock+0x2c/0x110 [ 31.809972] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.810575] ? lock_is_held_type+0x9f/0x120 [ 31.811157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.811795] ? mtree_range_walk+0x632/0x900 [ 31.812383] ? mas_walk+0x5c7/0x7c0 [ 31.812895] do_vmi_munmap+0x1f1/0x2b0 [ 31.813417] mmap_region+0x1f9/0x2660 [ 31.813934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.814481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.815251] ? __pfx_lock_acquire+0x10/0x10 [ 31.815818] ? __pfx_mmap_region+0x10/0x10 [ 31.816375] ? security_mmap_addr+0x7d/0xa0 [ 31.816935] ? get_unmapped_area+0x1f5/0x3f0 [ 31.817520] do_mmap+0x854/0xf00 [ 31.817986] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.818516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.819132] ksys_mmap_pgoff+0x3af/0x500 [ 31.819673] do_syscall_64+0x3f/0x90 [ 31.820189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.820881] RIP: 0033:0x7fc3fc4cad82 [ 31.821366] 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 [ 31.823627] RSP: 002b:00007ffca15a9998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.824579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3fc4cad82 [ 31.825470] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3fb904000 [ 31.826355] RBP: 00007fc3fb904000 R08: 0000000000000009 R09: 0000000000001000 [ 31.827268] R10: 0000000000000812 R11: 0000000000000206 R12: 000055970208fec0 [ 31.828167] R13: 00007ffca15a99b0 R14: 00007ffca15a99e0 R15: 00007ffca15a9d40 [ 31.829082] [ 31.829390] [ 31.829619] Allocated by task 212: [ 31.830075] kasan_save_stack+0x22/0x50 [ 31.830623] kasan_set_track+0x25/0x30 [ 31.831172] __kasan_slab_alloc+0x59/0x70 [ 31.831727] kmem_cache_alloc+0x16b/0x370 [ 31.832268] vm_area_dup+0x20/0x160 [ 31.832759] __split_vma+0x170/0x950 [ 31.833257] split_vma+0xc6/0x110 [ 31.833726] mprotect_fixup+0x8d2/0xb30 [ 31.834260] do_mprotect_pkey+0x87e/0xd40 [ 31.834826] __x64_sys_mprotect+0x78/0xc0 [ 31.835378] do_syscall_64+0x3f/0x90 [ 31.835892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.836577] [ 31.836806] Freed by task 212: [ 31.837229] kasan_save_stack+0x22/0x50 [ 31.837765] kasan_set_track+0x25/0x30 [ 31.838294] kasan_save_free_info+0x2b/0x50 [ 31.838877] __kasan_slab_free+0x10a/0x190 [ 31.839449] kmem_cache_free+0x10d/0x4d0 [ 31.840005] rcu_core+0x8c8/0x2860 [ 31.840479] __do_softirq+0x1b7/0x7d4 [ 31.840996] [ 31.841222] Last potentially related work creation: [ 31.841843] kasan_save_stack+0x22/0x50 [ 31.842387] __kasan_record_aux_stack+0x8e/0xa0 [ 31.843011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.843693] remove_vma+0x139/0x170 [ 31.844178] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.844780] do_vmi_munmap+0x1f1/0x2b0 [ 31.845302] __vm_munmap+0x138/0x3a0 [ 31.845798] __x64_sys_munmap+0x59/0x80 [ 31.846329] do_syscall_64+0x3f/0x90 [ 31.846849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.847544] [ 31.847774] Second to last potentially related work creation: [ 31.848495] kasan_save_stack+0x22/0x50 [ 31.849032] __kasan_record_aux_stack+0x8e/0xa0 [ 31.849639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.850323] remove_vma+0x139/0x170 [ 31.850816] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.851411] do_vmi_munmap+0x1f1/0x2b0 [ 31.851922] mmap_region+0x1f9/0x2660 [ 31.852434] do_mmap+0x854/0xf00 [ 31.852887] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.853410] ksys_mmap_pgoff+0x3af/0x500 [ 31.853945] do_syscall_64+0x3f/0x90 [ 31.854444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.855131] [ 31.855357] The buggy address belongs to the object at ffff88800b331740 [ 31.855357] which belongs to the cache vm_area_struct of size 168 [ 31.856925] The buggy address is located 88 bytes inside of [ 31.856925] freed 168-byte region [ffff88800b331740, ffff88800b3317e8) [ 31.858404] [ 31.858635] The buggy address belongs to the physical page: [ 31.859334] page:000000007526b820 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb331 [ 31.860476] memcg:ffff88800ed3d401 [ 31.860931] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.861671] page_type: 0xffffffff() [ 31.862149] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382fc0 dead000000000007 [ 31.863146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed3d401 [ 31.864140] page dumped because: kasan: bad access detected [ 31.864842] [ 31.865070] Memory state around the buggy address: [ 31.865680] ffff88800b331680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.866595] ffff88800b331700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.867515] >ffff88800b331780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.868424] ^ [ 31.868951] ffff88800b331800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.869867] ffff88800b331880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.870794] ================================================================== [ 31.871997] Disabling lock debugging due to kernel taint [ 33.706302] BUG: Bad rss-counter state mm:0000000091ae4570 type:MM_FILEPAGES val:33 [ 33.707252] BUG: Bad rss-counter state mm:0000000091ae4570 type:MM_ANONPAGES val:22 [ 34.261620] BUG: Bad rss-counter state mm:0000000058bdf8d9 type:MM_FILEPAGES val:33 [ 34.262844] BUG: Bad rss-counter state mm:0000000058bdf8d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22675' (ECDSA) to the list of known hosts. 2023/06/20 14:20:02 fuzzer started 2023/06/20 14:20:02 dialing manager at localhost:36067 2023/06/20 14:20:02 checking machine... 2023/06/20 14:20:02 checking revisions... [ 34.897843] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:20:02 testing simple program... [ 34.942468] cgroup: Unknown subsys name 'net' [ 34.993129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1357 RSI=ffff88801464fd10 RDI=ffff88806ce09ac0 RBP=8000000018092025 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000001dcef R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88801464fd10 R15=ffff88806ce09a70 RIP=ffffffff81131c60 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0c75835900 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=00007f0c74c691d0 CR3=0000000013a7c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b07065ce96e5bbd600000000000ae988 XMM05=7dfb550f48f4378d00000000001343f0 XMM06=806171799158d9670000000000133490 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=3e6fc6999b74d500 RBX=00007f4e4be518b0 RCX=0000000000000000 RDX=ffff888015ae1b40 RSI=ffffffff8363638a RDI=0000000000000007 RBP=ffff888017a27e60 RSP=ffff888017a27b50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000053 R13=0000000000000053 R14=0000000000000040 R15=0000000000000000 RIP=ffffffff836363ae 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 00007f4e4be55700 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=00007f8d470510b0 CR3=000000000dca2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031303a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383537 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000