syzkaller login: [ 31.176699] BUG: Bad rss-counter state mm:00000000371d1ba2 type:MM_FILEPAGES val:33 [ 31.178372] BUG: Bad rss-counter state mm:00000000371d1ba2 type:MM_ANONPAGES val:22 [ 31.344938] ================================================================== [ 31.346036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.347152] Read of size 8 at addr ffff888009479140 by task sshd/221 [ 31.347953] [ 31.348177] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.349099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.350162] Call Trace: [ 31.350484] [ 31.350771] dump_stack_lvl+0x91/0xf0 [ 31.351271] print_report+0xcc/0x620 [ 31.351775] ? __virt_addr_valid+0x102/0x340 [ 31.352327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352961] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353593] kasan_report+0xbe/0xf0 [ 31.354074] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354699] vma_interval_tree_remove+0xc75/0xec0 [ 31.355301] vma_prepare+0xc54/0x11a0 [ 31.355775] __split_vma+0x5af/0x950 [ 31.356263] ? __pfx___split_vma+0x10/0x10 [ 31.356799] ? find_held_lock+0x2c/0x110 [ 31.357352] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357930] ? lock_is_held_type+0x9f/0x120 [ 31.358527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.359241] ? mtree_range_walk+0x632/0x900 [ 31.359895] ? mas_walk+0x5c7/0x7c0 [ 31.360482] do_vmi_munmap+0x1f1/0x2b0 [ 31.361095] mmap_region+0x1f9/0x2660 [ 31.361712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.363222] ? __pfx_lock_acquire+0x10/0x10 [ 31.363896] ? __pfx_mmap_region+0x10/0x10 [ 31.364561] ? security_mmap_addr+0x7d/0xa0 [ 31.365250] ? get_unmapped_area+0x1f5/0x3f0 [ 31.365955] do_mmap+0x854/0xf00 [ 31.366510] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.367135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.367834] ksys_mmap_pgoff+0x3af/0x500 [ 31.368452] do_syscall_64+0x3f/0x90 [ 31.369042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369868] RIP: 0033:0x7fa602b4fd82 [ 31.370438] 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 [ 31.373053] RSP: 002b:00007fff3f654358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.374176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa602b4fd82 [ 31.375231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa601f89000 [ 31.376264] RBP: 00007fa601f89000 R08: 0000000000000009 R09: 0000000000001000 [ 31.377345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f2d1dfec0 [ 31.378379] R13: 00007fff3f654370 R14: 00007fff3f6543a0 R15: 00007fff3f654700 [ 31.379444] [ 31.379805] [ 31.380070] Allocated by task 214: [ 31.380598] kasan_save_stack+0x22/0x50 [ 31.381236] kasan_set_track+0x25/0x30 [ 31.381846] __kasan_slab_alloc+0x59/0x70 [ 31.382480] kmem_cache_alloc+0x16b/0x370 [ 31.383124] vm_area_dup+0x20/0x160 [ 31.383694] __split_vma+0x170/0x950 [ 31.384259] split_vma+0xc6/0x110 [ 31.384798] mprotect_fixup+0x8d2/0xb30 [ 31.385425] do_mprotect_pkey+0x87e/0xd40 [ 31.386050] __x64_sys_mprotect+0x78/0xc0 [ 31.386699] do_syscall_64+0x3f/0x90 [ 31.387286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388075] [ 31.388329] Freed by task 214: [ 31.388809] kasan_save_stack+0x22/0x50 [ 31.389434] kasan_set_track+0x25/0x30 [ 31.390032] kasan_save_free_info+0x2b/0x50 [ 31.390582] __kasan_slab_free+0x10a/0x190 [ 31.391142] kmem_cache_free+0x10d/0x4d0 [ 31.391665] rcu_core+0x8c8/0x2860 [ 31.392130] __do_softirq+0x1b7/0x7d4 [ 31.392617] [ 31.392836] Last potentially related work creation: [ 31.393442] kasan_save_stack+0x22/0x50 [ 31.393951] __kasan_record_aux_stack+0x8e/0xa0 [ 31.394550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.395223] remove_vma+0x139/0x170 [ 31.395675] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.396233] do_vmi_munmap+0x1f1/0x2b0 [ 31.396724] __vm_munmap+0x138/0x3a0 [ 31.397225] __x64_sys_munmap+0x59/0x80 [ 31.397727] do_syscall_64+0x3f/0x90 [ 31.398217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.398867] [ 31.399086] The buggy address belongs to the object at ffff8880094790e8 [ 31.399086] which belongs to the cache vm_area_struct of size 168 [ 31.400586] The buggy address is located 88 bytes inside of [ 31.400586] freed 168-byte region [ffff8880094790e8, ffff888009479190) [ 31.402087] [ 31.402308] The buggy address belongs to the physical page: [ 31.403011] page:000000001f33aead refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9479 [ 31.404130] memcg:ffff88800e0f1a01 [ 31.404570] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.405255] page_type: 0xffffffff() [ 31.405725] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.406645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f1a01 [ 31.407571] page dumped because: kasan: bad access detected [ 31.408249] [ 31.408472] Memory state around the buggy address: [ 31.409056] ffff888009479000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.409934] ffff888009479080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.410796] >ffff888009479100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.411659] ^ [ 31.412313] ffff888009479180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.413219] ffff888009479200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.414100] ================================================================== [ 31.415247] Disabling lock debugging due to kernel taint [ 33.932597] BUG: Bad rss-counter state mm:0000000098143ce4 type:MM_FILEPAGES val:33 [ 33.934626] BUG: Bad rss-counter state mm:0000000098143ce4 type:MM_ANONPAGES val:22 [ 34.457587] BUG: Bad rss-counter state mm:00000000f6e0dd7c type:MM_FILEPAGES val:33 [ 34.458845] BUG: Bad rss-counter state mm:00000000f6e0dd7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7913' (ECDSA) to the list of known hosts. 2023/06/20 20:36:33 fuzzer started 2023/06/20 20:36:33 dialing manager at localhost:36067 2023/06/20 20:36:33 checking machine... 2023/06/20 20:36:33 checking revisions... [ 35.164795] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:36:33 testing simple program... [ 35.213313] cgroup: Unknown subsys name 'net' [ 35.269805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:36:33 Registers: info registers vcpu 0 RAX=0000000000000030 RBX=000055f4068da780 RCX=0000000000000001 RDX=000000000000001e RSI=000000000000000e RDI=00007fffb87dc90f RBP=00007fffb87dcaa0 RSP=00007fffb87dc900 R8 =000055f4068df400 R9 =0066666666666666 R10=00007fffb87dc707 R11=0000000000000000 R12=00007fffb87dcb30 R13=00007fffb87dd310 R14=000000000000001f R15=00007fffb87dd090 RIP=000055f406430788 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f763644e900 00000000 00000000 GS =0000 0000000000000000 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=00007f7635869060 CR3=000000000d626000 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=545845544e4f435f58554e494c45535f XMM01=ffffffffffffff00ffffffffffffffff XMM02=766972705b20746f6f72203a64687373 XMM03=005d766972705b20746f6f72203a6468 XMM04=8b81b10563910f0b00000000000ae988 XMM05=faeb60b87a45864e0000000000133130 XMM06=c291bd5c70af25b90000000000131f20 XMM07=00000000000000000000000000000000 XMM08=3d454e494c444d435f5443454a424f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800fdc8001 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=ffff88800fdc7e01 RSI=ffff88800fdc7e50 RDI=ffff88806cf09aa8 RBP=ffff88800fdc7e50 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a8d8 R12=0000000000000008 R13=ffff88800fdc0000 R14=ffff88800fdc7e50 R15=ffff88806cf09a98 RIP=ffffffff8113048d RFL=00000293 [--S-A-C] 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 00007f48b8a27900 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=00007ffefa0b3000 CR3=000000000e8b8000 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