syzkaller login: [ 28.853669] BUG: Bad rss-counter state mm:00000000f6eb840b type:MM_FILEPAGES val:33 [ 28.854866] BUG: Bad rss-counter state mm:00000000f6eb840b type:MM_ANONPAGES val:22 [ 28.891834] ================================================================== [ 28.892916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.893854] Read of size 8 at addr ffff88800e8a6c20 by task sshd/221 [ 28.894648] [ 28.894921] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.895962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.897217] Call Trace: [ 28.897603] [ 28.897886] dump_stack_lvl+0x91/0xf0 [ 28.898478] print_report+0xcc/0x620 [ 28.898959] ? __virt_addr_valid+0x102/0x340 [ 28.899533] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900299] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901047] kasan_report+0xbe/0xf0 [ 28.901537] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902157] vma_interval_tree_remove+0xc75/0xec0 [ 28.902770] vma_prepare+0xc54/0x11a0 [ 28.903252] __split_vma+0x5af/0x950 [ 28.903725] ? __pfx___split_vma+0x10/0x10 [ 28.904264] ? find_held_lock+0x2c/0x110 [ 28.904792] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.905370] ? lock_is_held_type+0x9f/0x120 [ 28.905911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.906522] ? mtree_range_walk+0x632/0x900 [ 28.907084] ? mas_walk+0x5c7/0x7c0 [ 28.907562] do_vmi_munmap+0x1f1/0x2b0 [ 28.908056] mmap_region+0x1f9/0x2660 [ 28.908568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.909079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.909796] ? __pfx_lock_acquire+0x10/0x10 [ 28.910356] ? __pfx_mmap_region+0x10/0x10 [ 28.910913] ? security_mmap_addr+0x7d/0xa0 [ 28.911452] ? get_unmapped_area+0x1f5/0x3f0 [ 28.912024] do_mmap+0x854/0xf00 [ 28.912483] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.912989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.913551] ksys_mmap_pgoff+0x3af/0x500 [ 28.914062] do_syscall_64+0x3f/0x90 [ 28.914545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915197] RIP: 0033:0x7f4f6cd16d82 [ 28.915657] 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 [ 28.917864] RSP: 002b:00007fff5bbae268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.918801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f6cd16d82 [ 28.919697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f6c150000 [ 28.920597] RBP: 00007f4f6c150000 R08: 0000000000000009 R09: 0000000000001000 [ 28.921470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eebffbbb20 [ 28.922344] R13: 00007fff5bbae280 R14: 00007fff5bbae2b0 R15: 00007fff5bbae610 [ 28.923215] [ 28.923515] [ 28.923732] Allocated by task 213: [ 28.924185] kasan_save_stack+0x22/0x50 [ 28.924707] kasan_set_track+0x25/0x30 [ 28.925214] __kasan_slab_alloc+0x59/0x70 [ 28.925765] kmem_cache_alloc+0x16b/0x370 [ 28.926303] vm_area_dup+0x20/0x160 [ 28.926780] __split_vma+0x170/0x950 [ 28.927247] split_vma+0xc6/0x110 [ 28.927696] mprotect_fixup+0x8d2/0xb30 [ 28.928219] do_mprotect_pkey+0x87e/0xd40 [ 28.928734] __x64_sys_mprotect+0x78/0xc0 [ 28.929265] do_syscall_64+0x3f/0x90 [ 28.929751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930408] [ 28.930632] Freed by task 213: [ 28.931020] kasan_save_stack+0x22/0x50 [ 28.931516] kasan_set_track+0x25/0x30 [ 28.932007] kasan_save_free_info+0x2b/0x50 [ 28.932548] __kasan_slab_free+0x10a/0x190 [ 28.933080] kmem_cache_free+0x10d/0x4d0 [ 28.933580] rcu_core+0x8c8/0x2860 [ 28.934027] __do_softirq+0x1b7/0x7d4 [ 28.934502] [ 28.934725] Last potentially related work creation: [ 28.935354] kasan_save_stack+0x22/0x50 [ 28.935865] __kasan_record_aux_stack+0x8e/0xa0 [ 28.936444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.937144] remove_vma+0x139/0x170 [ 28.937609] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.938169] do_vmi_munmap+0x1f1/0x2b0 [ 28.938657] __vm_munmap+0x138/0x3a0 [ 28.939120] __x64_sys_munmap+0x59/0x80 [ 28.939612] do_syscall_64+0x3f/0x90 [ 28.940096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940787] [ 28.941003] The buggy address belongs to the object at ffff88800e8a6bc8 [ 28.941003] which belongs to the cache vm_area_struct of size 168 [ 28.942492] The buggy address is located 88 bytes inside of [ 28.942492] freed 168-byte region [ffff88800e8a6bc8, ffff88800e8a6c70) [ 28.943911] [ 28.944146] The buggy address belongs to the physical page: [ 28.944855] page:0000000061e514ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8a6 [ 28.946018] memcg:ffff88800ea06701 [ 28.946472] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.947213] page_type: 0xffffffff() [ 28.947692] raw: 0100000000000200 ffff8880087a0c80 ffffea000039d180 dead000000000003 [ 28.948682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea06701 [ 28.949645] page dumped because: kasan: bad access detected [ 28.950361] [ 28.950592] Memory state around the buggy address: [ 28.951210] ffff88800e8a6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.952151] ffff88800e8a6b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.953068] >ffff88800e8a6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.953977] ^ [ 28.954537] ffff88800e8a6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.955451] ffff88800e8a6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.956365] ================================================================== [ 28.957489] Disabling lock debugging due to kernel taint [ 31.334307] BUG: Bad rss-counter state mm:00000000cc0e9a4d type:MM_FILEPAGES val:33 [ 31.335266] BUG: Bad rss-counter state mm:00000000cc0e9a4d type:MM_ANONPAGES val:22 [ 31.821261] BUG: Bad rss-counter state mm:000000001da9d64f type:MM_FILEPAGES val:33 [ 31.822676] BUG: Bad rss-counter state mm:000000001da9d64f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64326' (ECDSA) to the list of known hosts. 2023/06/20 19:32:12 fuzzer started 2023/06/20 19:32:12 dialing manager at localhost:36067 2023/06/20 19:32:12 checking machine... 2023/06/20 19:32:12 checking revisions... [ 32.380004] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:32:12 testing simple program... [ 32.419438] cgroup: Unknown subsys name 'net' [ 32.464490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8b6be19e10 CR3=000000000c66a000 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=b2a70c44b3b1af84854d50f4dff21010 XMM02=ec2efd57dc4c00df0000000000119868 XMM03=9a6091118e051b270000000000119938 XMM04=4337f9ee6f268aef00000000000ae988 XMM05=06cfcb1faf0a87850000000000131848 XMM06=c291bd5c70af25b90000000000131240 XMM07=e042d86d42eb936e0000000000120f88 XMM08=9a6091118e051b270000000000119938 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3501 RDX=1ffff11001de9f10 RSI=ffffffff8450cc7f RDI=ffff88800ef4f828 RBP=ffff88800ef4f880 RSP=ffff88800ef4f7b8 R8 =ffffffff863b3588 R9 =ffff88800ef4f868 R10=0000000000038001 R11=000000000008a96a R12=ffff88800ef4f8f0 R13=0000000000000000 R14=ffff88800fbf3680 R15=ffff88800ef4f828 RIP=ffffffff8113062c 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 00007f6087c6c900 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=00007ffcd7e61000 CR3=0000000016a2c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000