syzkaller login: [ 31.067969] BUG: Bad rss-counter state mm:000000006d960f0f type:MM_FILEPAGES val:33 [ 31.069094] BUG: Bad rss-counter state mm:000000006d960f0f type:MM_ANONPAGES val:22 [ 31.226886] ================================================================== [ 31.227827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.228793] Read of size 8 at addr ffff88800c51a880 by task sshd/218 [ 31.229591] [ 31.229881] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.230765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.231772] Call Trace: [ 31.232103] [ 31.232398] dump_stack_lvl+0x91/0xf0 [ 31.232902] print_report+0xcc/0x620 [ 31.233407] ? __virt_addr_valid+0x102/0x340 [ 31.233977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235274] kasan_report+0xbe/0xf0 [ 31.235765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236405] vma_interval_tree_remove+0xc75/0xec0 [ 31.237035] vma_prepare+0xc54/0x11a0 [ 31.237536] __split_vma+0x5af/0x950 [ 31.238033] ? __pfx___split_vma+0x10/0x10 [ 31.238589] ? find_held_lock+0x2c/0x110 [ 31.239144] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.239741] ? lock_is_held_type+0x9f/0x120 [ 31.240299] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.240929] ? mtree_range_walk+0x632/0x900 [ 31.241505] ? mas_walk+0x5c7/0x7c0 [ 31.242001] do_vmi_munmap+0x1f1/0x2b0 [ 31.242518] mmap_region+0x1f9/0x2660 [ 31.243020] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.243572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.244327] ? __pfx_lock_acquire+0x10/0x10 [ 31.244886] ? __pfx_mmap_region+0x10/0x10 [ 31.245448] ? security_mmap_addr+0x7d/0xa0 [ 31.246002] ? get_unmapped_area+0x1f5/0x3f0 [ 31.246583] do_mmap+0x854/0xf00 [ 31.247038] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.247580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.248171] ksys_mmap_pgoff+0x3af/0x500 [ 31.248710] do_syscall_64+0x3f/0x90 [ 31.249221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249901] RIP: 0033:0x7f1d52b59d82 [ 31.250378] 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 [ 31.252616] RSP: 002b:00007ffe4b0a5a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.253558] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d52b59d82 [ 31.254444] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d51f93000 [ 31.255345] RBP: 00007f1d51f93000 R08: 0000000000000009 R09: 0000000000001000 [ 31.256231] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b84165ad90 [ 31.257113] R13: 00007ffe4b0a5aa0 R14: 00007ffe4b0a5ad0 R15: 00007ffe4b0a5e30 [ 31.258028] [ 31.258336] [ 31.258565] Allocated by task 211: [ 31.259020] kasan_save_stack+0x22/0x50 [ 31.259569] kasan_set_track+0x25/0x30 [ 31.260087] __kasan_slab_alloc+0x59/0x70 [ 31.260644] kmem_cache_alloc+0x16b/0x370 [ 31.261180] vm_area_dup+0x20/0x160 [ 31.261657] __split_vma+0x170/0x950 [ 31.262144] split_vma+0xc6/0x110 [ 31.262606] mprotect_fixup+0x8d2/0xb30 [ 31.263139] do_mprotect_pkey+0x87e/0xd40 [ 31.263685] __x64_sys_mprotect+0x78/0xc0 [ 31.264232] do_syscall_64+0x3f/0x90 [ 31.264729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265400] [ 31.265627] Freed by task 211: [ 31.266039] kasan_save_stack+0x22/0x50 [ 31.266569] kasan_set_track+0x25/0x30 [ 31.267086] kasan_save_free_info+0x2b/0x50 [ 31.267649] __kasan_slab_free+0x10a/0x190 [ 31.268206] kmem_cache_free+0x10d/0x4d0 [ 31.268732] rcu_core+0x8c8/0x2860 [ 31.269196] __do_softirq+0x1b7/0x7d4 [ 31.269692] [ 31.269920] Last potentially related work creation: [ 31.270531] kasan_save_stack+0x22/0x50 [ 31.271055] __kasan_record_aux_stack+0x8e/0xa0 [ 31.271683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.272359] remove_vma+0x139/0x170 [ 31.272828] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.273411] do_vmi_munmap+0x1f1/0x2b0 [ 31.273920] __vm_munmap+0x138/0x3a0 [ 31.274404] __x64_sys_munmap+0x59/0x80 [ 31.274923] do_syscall_64+0x3f/0x90 [ 31.275427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276094] [ 31.276317] Second to last potentially related work creation: [ 31.277018] kasan_save_stack+0x22/0x50 [ 31.277541] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.278802] remove_vma+0x139/0x170 [ 31.279289] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.279875] do_vmi_munmap+0x1f1/0x2b0 [ 31.280388] mmap_region+0x1f9/0x2660 [ 31.280887] do_mmap+0x854/0xf00 [ 31.281337] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.281849] ksys_mmap_pgoff+0x3af/0x500 [ 31.282370] do_syscall_64+0x3f/0x90 [ 31.282872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283557] [ 31.283791] The buggy address belongs to the object at ffff88800c51a828 [ 31.283791] which belongs to the cache vm_area_struct of size 168 [ 31.285389] The buggy address is located 88 bytes inside of [ 31.285389] freed 168-byte region [ffff88800c51a828, ffff88800c51a8d0) [ 31.286847] [ 31.287094] The buggy address belongs to the physical page: [ 31.287781] page:000000009fcb6850 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc51a [ 31.288907] memcg:ffff88800ebe9d01 [ 31.289355] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.290081] page_type: 0xffffffff() [ 31.290559] raw: 0100000000000200 ffff8880087a0c80 ffffea00003975c0 dead000000000003 [ 31.291563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebe9d01 [ 31.292538] page dumped because: kasan: bad access detected [ 31.293262] [ 31.293490] Memory state around the buggy address: [ 31.294111] ffff88800c51a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.295045] ffff88800c51a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.295978] >ffff88800c51a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.296897] ^ [ 31.297340] ffff88800c51a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.298277] ffff88800c51a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.299225] ================================================================== [ 31.300548] Disabling lock debugging due to kernel taint [ 33.941489] BUG: Bad rss-counter state mm:0000000064e4bed0 type:MM_FILEPAGES val:33 [ 33.942922] BUG: Bad rss-counter state mm:0000000064e4bed0 type:MM_ANONPAGES val:22 [ 34.514520] BUG: Bad rss-counter state mm:00000000b1d59bfa type:MM_FILEPAGES val:33 [ 34.515768] BUG: Bad rss-counter state mm:00000000b1d59bfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62988' (ECDSA) to the list of known hosts. 2023/06/20 19:09:41 fuzzer started 2023/06/20 19:09:41 dialing manager at localhost:36067 2023/06/20 19:09:41 checking machine... 2023/06/20 19:09:41 checking revisions... [ 35.184690] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:09:42 testing simple program... [ 35.236098] cgroup: Unknown subsys name 'net' [ 35.273067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:09:41 Registers: info registers vcpu 0 RAX=1ffffffff0bb7b00 RBX=ffffffff85dbd804 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88800daa7820 R8 =ffffffff860d8256 R9 =ffff88800daa7918 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd814 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f0101ea3900 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=00007f010245a618 CR3=000000000ddae000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff6aff162f0 CR3=000000000d638000 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=e5c74cae88d5b4a923487cfb893ad78f XMM02=ec2efd57dc4c00df000000000011dc48 XMM03=20fdc953f526ebca000000000011dd18 XMM04=8b2c3c465c0a53f800000000000ae988 XMM05=751b9502027dc0b90000000000134310 XMM06=bdf2e299e47b49d50000000000134198 XMM07=e042d86d42eb936e0000000000123e00 XMM08=20fdc953f526ebca000000000011dd18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000