syzkaller login: [ 33.209278] BUG: Bad rss-counter state mm:00000000ac8cf49a type:MM_FILEPAGES val:33 [ 33.210430] BUG: Bad rss-counter state mm:00000000ac8cf49a type:MM_ANONPAGES val:22 [ 33.338170] ================================================================== [ 33.339103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.340087] Read of size 8 at addr ffff888017634058 by task sshd/220 [ 33.340872] [ 33.341201] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.342088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.343088] Call Trace: [ 33.343439] [ 33.343731] dump_stack_lvl+0x91/0xf0 [ 33.344235] print_report+0xcc/0x620 [ 33.344725] ? __virt_addr_valid+0x102/0x340 [ 33.345286] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.345927] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.346559] kasan_report+0xbe/0xf0 [ 33.347037] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.347667] vma_interval_tree_remove+0xc75/0xec0 [ 33.348298] vma_prepare+0xc54/0x11a0 [ 33.348793] __split_vma+0x5af/0x950 [ 33.349276] ? __pfx___split_vma+0x10/0x10 [ 33.349814] ? find_held_lock+0x2c/0x110 [ 33.350348] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.350926] ? lock_is_held_type+0x9f/0x120 [ 33.351482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.352117] ? mtree_range_walk+0x632/0x900 [ 33.352688] ? mas_walk+0x5c7/0x7c0 [ 33.353173] do_vmi_munmap+0x1f1/0x2b0 [ 33.353680] mmap_region+0x1f9/0x2660 [ 33.354176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.354707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.355448] ? __pfx_lock_acquire+0x10/0x10 [ 33.356006] ? __pfx_mmap_region+0x10/0x10 [ 33.356548] ? security_mmap_addr+0x7d/0xa0 [ 33.357077] ? get_unmapped_area+0x1f5/0x3f0 [ 33.357633] do_mmap+0x854/0xf00 [ 33.358078] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.358582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.359147] ksys_mmap_pgoff+0x3af/0x500 [ 33.359667] do_syscall_64+0x3f/0x90 [ 33.360169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.360836] RIP: 0033:0x7fb5bc852d82 [ 33.361297] 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 [ 33.363446] RSP: 002b:00007ffe72e118b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.364388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5bc852d82 [ 33.365260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5bbc8c000 [ 33.366142] RBP: 00007fb5bbc8c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.367025] R10: 0000000000000812 R11: 0000000000000206 R12: 000056549b155ec0 [ 33.367917] R13: 00007ffe72e118d0 R14: 00007ffe72e11900 R15: 00007ffe72e11c60 [ 33.368796] [ 33.369099] [ 33.369322] Allocated by task 213: [ 33.369765] kasan_save_stack+0x22/0x50 [ 33.370281] kasan_set_track+0x25/0x30 [ 33.370787] __kasan_slab_alloc+0x59/0x70 [ 33.371323] kmem_cache_alloc+0x16b/0x370 [ 33.371857] vm_area_dup+0x20/0x160 [ 33.372326] __split_vma+0x170/0x950 [ 33.372803] split_vma+0xc6/0x110 [ 33.373259] mprotect_fixup+0x8d2/0xb30 [ 33.373765] do_mprotect_pkey+0x87e/0xd40 [ 33.374303] __x64_sys_mprotect+0x78/0xc0 [ 33.374840] do_syscall_64+0x3f/0x90 [ 33.375322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.375992] [ 33.376215] Freed by task 13: [ 33.376606] kasan_save_stack+0x22/0x50 [ 33.377125] kasan_set_track+0x25/0x30 [ 33.377629] kasan_save_free_info+0x2b/0x50 [ 33.378177] __kasan_slab_free+0x10a/0x190 [ 33.378721] kmem_cache_free+0x10d/0x4d0 [ 33.379247] rcu_core+0x8c8/0x2860 [ 33.379699] __do_softirq+0x1b7/0x7d4 [ 33.380193] [ 33.380413] Last potentially related work creation: [ 33.381013] kasan_save_stack+0x22/0x50 [ 33.381534] __kasan_record_aux_stack+0x8e/0xa0 [ 33.382120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.382773] remove_vma+0x139/0x170 [ 33.383235] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.383806] do_vmi_munmap+0x1f1/0x2b0 [ 33.384343] __vm_munmap+0x138/0x3a0 [ 33.384819] __x64_sys_munmap+0x59/0x80 [ 33.385334] do_syscall_64+0x3f/0x90 [ 33.385816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.386465] [ 33.386682] The buggy address belongs to the object at ffff888017634000 [ 33.386682] which belongs to the cache vm_area_struct of size 168 [ 33.388211] The buggy address is located 88 bytes inside of [ 33.388211] freed 168-byte region [ffff888017634000, ffff8880176340a8) [ 33.389682] [ 33.389902] The buggy address belongs to the physical page: [ 33.390571] page:0000000006df4497 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17634 [ 33.391684] memcg:ffff88800d838501 [ 33.392131] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.392800] page_type: 0xffffffff() [ 33.393258] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.394206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d838501 [ 33.395126] page dumped because: kasan: bad access detected [ 33.395793] [ 33.396030] Memory state around the buggy address: [ 33.396627] ffff888017633f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.397504] ffff888017633f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.398374] >ffff888017634000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.399236] ^ [ 33.399990] ffff888017634080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.400886] ffff888017634100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.401767] ================================================================== [ 33.402750] Disabling lock debugging due to kernel taint [ 35.181806] BUG: Bad rss-counter state mm:00000000f39aa4c0 type:MM_FILEPAGES val:33 [ 35.182594] BUG: Bad rss-counter state mm:00000000f39aa4c0 type:MM_ANONPAGES val:22 [ 35.715974] BUG: Bad rss-counter state mm:0000000047a110cf type:MM_FILEPAGES val:33 [ 35.717180] BUG: Bad rss-counter state mm:0000000047a110cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10416' (ECDSA) to the list of known hosts. 2023/06/20 04:56:46 fuzzer started 2023/06/20 04:56:46 dialing manager at localhost:44161 2023/06/20 04:56:46 checking machine... 2023/06/20 04:56:46 checking revisions... [ 36.355128] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:56:46 testing simple program... [ 36.403931] cgroup: Unknown subsys name 'net' [ 36.455649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:56:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81eeeaf8 RCX=0000000000000001 RDX=1ffff11001de9f24 RSI=ffff88800ef4fd48 RDI=ffffffff81eeeaf8 RBP=ffffffff81eeeaf8 RSP=ffff88800ef4f878 R8 =0000000000000001 R9 =ffff88800ef4f908 R10=0000000000038001 R11=0000000000020c48 R12=0000000000000001 R13=0000000000000000 R14=ffff888015a23680 R15=0000000000092c40 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007fcf02898900 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=00007fcf02e4d650 CR3=000000001a2cc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f4fa7bf8310 CR3=000000000d9a2000 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=bee25bd38a277fbd1b4f3b11bcb6e52f XMM02=2c67c8bc2e329bc3000000000011c7f8 XMM03=fb795ef6d65770560000000000124068 XMM04=8b9945cdb4eeb81300000000000ae988 XMM05=19e9129bd510f2350000000000133b68 XMM06=a83bf0af5702da9800000000001329d0 XMM07=e042d86d42eb936e00000000001242e8 XMM08=724a236b998db5a7000000000011c858 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000