syzkaller login: [ 30.092235] BUG: Bad rss-counter state mm:000000004756e4bc type:MM_FILEPAGES val:33 [ 30.093446] BUG: Bad rss-counter state mm:000000004756e4bc type:MM_ANONPAGES val:22 [ 30.254868] ================================================================== [ 30.255770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.256791] Read of size 8 at addr ffff88800df08ed8 by task sshd/221 [ 30.257567] [ 30.257784] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.258664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.259653] Call Trace: [ 30.259974] [ 30.260257] dump_stack_lvl+0x91/0xf0 [ 30.260746] print_report+0xcc/0x620 [ 30.261237] ? __virt_addr_valid+0x102/0x340 [ 30.261788] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.262424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.263043] kasan_report+0xbe/0xf0 [ 30.263517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264143] vma_interval_tree_remove+0xc75/0xec0 [ 30.264761] vma_prepare+0xc54/0x11a0 [ 30.265236] __split_vma+0x5af/0x950 [ 30.265703] ? __pfx___split_vma+0x10/0x10 [ 30.266258] ? find_held_lock+0x2c/0x110 [ 30.266776] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.267341] ? lock_is_held_type+0x9f/0x120 [ 30.267881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.268487] ? mtree_range_walk+0x632/0x900 [ 30.269048] ? mas_walk+0x5c7/0x7c0 [ 30.269524] do_vmi_munmap+0x1f1/0x2b0 [ 30.270026] mmap_region+0x1f9/0x2660 [ 30.270508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.271017] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.271725] ? __pfx_lock_acquire+0x10/0x10 [ 30.272265] ? __pfx_mmap_region+0x10/0x10 [ 30.272796] ? security_mmap_addr+0x7d/0xa0 [ 30.273325] ? get_unmapped_area+0x1f5/0x3f0 [ 30.273893] do_mmap+0x854/0xf00 [ 30.274333] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.274834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.275417] ksys_mmap_pgoff+0x3af/0x500 [ 30.275933] do_syscall_64+0x3f/0x90 [ 30.276411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.277071] RIP: 0033:0x7f3b0c485d82 [ 30.277529] 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 [ 30.279701] RSP: 002b:00007fff717ff678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.280606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b0c485d82 [ 30.281461] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b0b8bf000 [ 30.282322] RBP: 00007f3b0b8bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.283167] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba9ca36ec0 [ 30.284014] R13: 00007fff717ff690 R14: 00007fff717ff6c0 R15: 00007fff717ffa20 [ 30.284876] [ 30.285168] [ 30.285380] Allocated by task 214: [ 30.285808] kasan_save_stack+0x22/0x50 [ 30.286334] kasan_set_track+0x25/0x30 [ 30.286827] __kasan_slab_alloc+0x59/0x70 [ 30.287347] kmem_cache_alloc+0x16b/0x370 [ 30.287861] vm_area_dup+0x20/0x160 [ 30.288314] __split_vma+0x170/0x950 [ 30.288781] split_vma+0xc6/0x110 [ 30.289219] mprotect_fixup+0x8d2/0xb30 [ 30.289720] do_mprotect_pkey+0x87e/0xd40 [ 30.290252] __x64_sys_mprotect+0x78/0xc0 [ 30.290769] do_syscall_64+0x3f/0x90 [ 30.291242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.291916] [ 30.292132] Freed by task 214: [ 30.292527] kasan_save_stack+0x22/0x50 [ 30.293037] kasan_set_track+0x25/0x30 [ 30.293535] kasan_save_free_info+0x2b/0x50 [ 30.294081] __kasan_slab_free+0x10a/0x190 [ 30.294613] kmem_cache_free+0x10d/0x4d0 [ 30.295132] rcu_core+0x8c8/0x2860 [ 30.295577] __do_softirq+0x1b7/0x7d4 [ 30.296069] [ 30.296280] Last potentially related work creation: [ 30.296871] kasan_save_stack+0x22/0x50 [ 30.297380] __kasan_record_aux_stack+0x8e/0xa0 [ 30.297982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.298629] remove_vma+0x139/0x170 [ 30.299087] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.299657] do_vmi_munmap+0x1f1/0x2b0 [ 30.300149] __vm_munmap+0x138/0x3a0 [ 30.300615] __x64_sys_munmap+0x59/0x80 [ 30.301116] do_syscall_64+0x3f/0x90 [ 30.301593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.302246] [ 30.302461] Second to last potentially related work creation: [ 30.303145] kasan_save_stack+0x22/0x50 [ 30.303654] __kasan_record_aux_stack+0x8e/0xa0 [ 30.304226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.304866] remove_vma+0x139/0x170 [ 30.305318] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.305897] do_vmi_munmap+0x1f1/0x2b0 [ 30.306382] mmap_region+0x1f9/0x2660 [ 30.306859] do_mmap+0x854/0xf00 [ 30.307288] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.307779] ksys_mmap_pgoff+0x3af/0x500 [ 30.308283] do_syscall_64+0x3f/0x90 [ 30.308756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.309398] [ 30.309611] The buggy address belongs to the object at ffff88800df08e80 [ 30.309611] which belongs to the cache vm_area_struct of size 168 [ 30.311095] The buggy address is located 88 bytes inside of [ 30.311095] freed 168-byte region [ffff88800df08e80, ffff88800df08f28) [ 30.312486] [ 30.312700] The buggy address belongs to the physical page: [ 30.313368] page:000000004f322f12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf08 [ 30.314460] memcg:ffff88800de08d01 [ 30.314882] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.315578] page_type: 0xffffffff() [ 30.316033] raw: 0100000000000200 ffff8880087a0c80 ffffea0000255080 dead000000000003 [ 30.316957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de08d01 [ 30.317872] page dumped because: kasan: bad access detected [ 30.318544] [ 30.318763] Memory state around the buggy address: [ 30.319349] ffff88800df08d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.320195] ffff88800df08e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.321056] >ffff88800df08e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.321924] ^ [ 30.322656] ffff88800df08f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.323502] ffff88800df08f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.324367] ================================================================== [ 30.325384] Disabling lock debugging due to kernel taint [ 32.322803] BUG: Bad rss-counter state mm:00000000e59c6b2e type:MM_FILEPAGES val:33 [ 32.323821] BUG: Bad rss-counter state mm:00000000e59c6b2e type:MM_ANONPAGES val:22 [ 32.766919] BUG: Bad rss-counter state mm:0000000048581194 type:MM_FILEPAGES val:33 [ 32.767968] BUG: Bad rss-counter state mm:0000000048581194 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24885' (ECDSA) to the list of known hosts. 2023/06/21 03:10:30 fuzzer started 2023/06/21 03:10:30 dialing manager at localhost:36067 2023/06/21 03:10:30 checking machine... 2023/06/21 03:10:30 checking revisions... [ 33.482021] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:10:30 testing simple program... [ 33.532000] cgroup: Unknown subsys name 'net' [ 33.589827] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:10:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81f54a33 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000003a4e3 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800fc80000 R15=ffff88806ce09a98 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 00007f3ded030900 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=00007f3dec4aa860 CR3=000000000981a000 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=9878b37ed6d3d593a241b2550a0f1a2b XMM02=ec2efd57dc4c00df000000000011a380 XMM03=db421fc9157c7754000000000011a450 XMM04=bf3ef9fee8b11a5600000000000ae988 XMM05=cc688352ce6b9d060000000000133c38 XMM06=c291bd5c70af25b90000000000132a28 XMM07=fb795ef6d65770560000000000121968 XMM08=2c67c8bc2e329bc3000000000011a3f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002de7ec3 RBX=0000000000000006 RCX=0000000000000001 RDX=0000000000000800 RSI=0000000000000009 RDI=ffff888016f3f618 RBP=dffffc0000000000 RSP=ffff888016f3f538 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000009 R13=0000000000000800 R14=ffff888016f3f5e8 R15=ffff88800f89ad10 RIP=ffffffff813ad61a 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 00007f0f0fc73900 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=00007ffd42844000 CR3=000000000f2f4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000