syzkaller login: [ 31.747160] BUG: Bad rss-counter state mm:00000000aed53d8a type:MM_FILEPAGES val:33 [ 31.748337] BUG: Bad rss-counter state mm:00000000aed53d8a type:MM_ANONPAGES val:22 [ 31.906715] ================================================================== [ 31.907634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.908577] Read of size 8 at addr ffff88800fced140 by task sshd/221 [ 31.909372] [ 31.909604] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.910639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.911628] Call Trace: [ 31.911953] [ 31.912244] dump_stack_lvl+0x91/0xf0 [ 31.912739] print_report+0xcc/0x620 [ 31.913222] ? __virt_addr_valid+0x102/0x340 [ 31.913808] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.914434] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.915064] kasan_report+0xbe/0xf0 [ 31.915547] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.916162] vma_interval_tree_remove+0xc75/0xec0 [ 31.916775] vma_prepare+0xc54/0x11a0 [ 31.917258] __split_vma+0x5af/0x950 [ 31.917744] ? __pfx___split_vma+0x10/0x10 [ 31.918279] ? find_held_lock+0x2c/0x110 [ 31.918798] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.919378] ? lock_is_held_type+0x9f/0x120 [ 31.919923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.920527] ? mtree_range_walk+0x632/0x900 [ 31.921085] ? mas_walk+0x5c7/0x7c0 [ 31.921569] do_vmi_munmap+0x1f1/0x2b0 [ 31.922071] mmap_region+0x1f9/0x2660 [ 31.922561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.923068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.923777] ? __pfx_lock_acquire+0x10/0x10 [ 31.924340] ? __pfx_mmap_region+0x10/0x10 [ 31.924869] ? security_mmap_addr+0x7d/0xa0 [ 31.925415] ? get_unmapped_area+0x1f5/0x3f0 [ 31.926004] do_mmap+0x854/0xf00 [ 31.926457] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.926964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.927531] ksys_mmap_pgoff+0x3af/0x500 [ 31.928047] do_syscall_64+0x3f/0x90 [ 31.928529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.929193] RIP: 0033:0x7ff85cbfbd82 [ 31.929661] 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 [ 31.931827] RSP: 002b:00007ffdf86a1978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.932743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff85cbfbd82 [ 31.933618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff85c035000 [ 31.934461] RBP: 00007ff85c035000 R08: 0000000000000009 R09: 0000000000001000 [ 31.935302] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562952172f70 [ 31.936142] R13: 00007ffdf86a1990 R14: 00007ffdf86a19c0 R15: 00007ffdf86a1d20 [ 31.936995] [ 31.937287] [ 31.937511] Allocated by task 214: [ 31.937935] kasan_save_stack+0x22/0x50 [ 31.938445] kasan_set_track+0x25/0x30 [ 31.938943] __kasan_slab_alloc+0x59/0x70 [ 31.939464] kmem_cache_alloc+0x16b/0x370 [ 31.939978] vm_area_dup+0x20/0x160 [ 31.940431] __split_vma+0x170/0x950 [ 31.940908] split_vma+0xc6/0x110 [ 31.941352] mprotect_fixup+0x8d2/0xb30 [ 31.941866] do_mprotect_pkey+0x87e/0xd40 [ 31.942388] __x64_sys_mprotect+0x78/0xc0 [ 31.942915] do_syscall_64+0x3f/0x90 [ 31.943387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.944037] [ 31.944255] Freed by task 214: [ 31.944656] kasan_save_stack+0x22/0x50 [ 31.945167] kasan_set_track+0x25/0x30 [ 31.945681] kasan_save_free_info+0x2b/0x50 [ 31.946213] __kasan_slab_free+0x10a/0x190 [ 31.946749] kmem_cache_free+0x10d/0x4d0 [ 31.947269] rcu_core+0x8c8/0x2860 [ 31.947722] __do_softirq+0x1b7/0x7d4 [ 31.948204] [ 31.948426] Last potentially related work creation: [ 31.949012] kasan_save_stack+0x22/0x50 [ 31.949527] __kasan_record_aux_stack+0x8e/0xa0 [ 31.950103] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.950743] remove_vma+0x139/0x170 [ 31.951237] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.951807] do_vmi_munmap+0x1f1/0x2b0 [ 31.952290] __vm_munmap+0x138/0x3a0 [ 31.952756] __x64_sys_munmap+0x59/0x80 [ 31.953251] do_syscall_64+0x3f/0x90 [ 31.953746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.954383] [ 31.954596] The buggy address belongs to the object at ffff88800fced0e8 [ 31.954596] which belongs to the cache vm_area_struct of size 168 [ 31.956052] The buggy address is located 88 bytes inside of [ 31.956052] freed 168-byte region [ffff88800fced0e8, ffff88800fced190) [ 31.957456] [ 31.957677] The buggy address belongs to the physical page: [ 31.958333] page:00000000b375f780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfced [ 31.959444] memcg:ffff888018955801 [ 31.959874] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.960524] page_type: 0xffffffff() [ 31.960982] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.961923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018955801 [ 31.962848] page dumped because: kasan: bad access detected [ 31.963507] [ 31.963732] Memory state around the buggy address: [ 31.964316] ffff88800fced000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.965199] ffff88800fced080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.966078] >ffff88800fced100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.966946] ^ [ 31.967594] ffff88800fced180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.968473] ffff88800fced200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.969336] ================================================================== [ 31.970267] Disabling lock debugging due to kernel taint [ 34.693886] BUG: Bad rss-counter state mm:000000007cea3c00 type:MM_FILEPAGES val:33 [ 34.694796] BUG: Bad rss-counter state mm:000000007cea3c00 type:MM_ANONPAGES val:22 [ 35.194156] BUG: Bad rss-counter state mm:000000004cb09a0c type:MM_FILEPAGES val:33 [ 35.195381] BUG: Bad rss-counter state mm:000000004cb09a0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8886' (ECDSA) to the list of known hosts. 2023/06/19 17:29:32 fuzzer started 2023/06/19 17:29:32 dialing manager at localhost:44161 2023/06/19 17:29:32 checking machine... 2023/06/19 17:29:32 checking revisions... [ 35.930861] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:29:32 testing simple program... [ 35.983658] cgroup: Unknown subsys name 'net' [ 36.024266] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:29:30 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000f24c1fba RCX=ffff88806ca0fdd0 RDX=000000000000000f RSI=0000000000000003 RDI=00000000e3e99767 RBP=ffff888009bd9130 RSP=ffff88800f33f3a8 R8 =00000000688ba5b9 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=00000000000928c0 R14=ffff88800f33f410 R15=000000000000000f RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007f4ec13cb900 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=00007f4ec1982618 CR3=000000000c4d4000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f34a4d01390 CR3=00000000141e0000 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=e025fae9c4aa65b12b47b59b6080115e XMM02=ec2efd57dc4c00df000000000011eb30 XMM03=9b2e376ed0c037c1000000000011ec00 XMM04=c519ccc9a23e21f600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133378 XMM06=b23bedc88bda7bc70000000000131a78 XMM07=e042d86d42eb936e0000000000123b00 XMM08=9b2e376ed0c037c1000000000011ec00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000