syzkaller login: [ 30.642496] BUG: Bad rss-counter state mm:000000003730d811 type:MM_FILEPAGES val:33 [ 30.643575] BUG: Bad rss-counter state mm:000000003730d811 type:MM_ANONPAGES val:22 [ 30.802875] ================================================================== [ 30.803823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.804753] Read of size 8 at addr ffff88800e429798 by task sshd/220 [ 30.805517] [ 30.805940] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.806812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.807809] Call Trace: [ 30.808154] [ 30.808439] dump_stack_lvl+0x91/0xf0 [ 30.808934] print_report+0xcc/0x620 [ 30.809423] ? __virt_addr_valid+0x102/0x340 [ 30.809980] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810602] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.811222] kasan_report+0xbe/0xf0 [ 30.811703] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812352] vma_interval_tree_remove+0xc75/0xec0 [ 30.812963] vma_prepare+0xc54/0x11a0 [ 30.813440] __split_vma+0x5af/0x950 [ 30.813916] ? __pfx___split_vma+0x10/0x10 [ 30.814448] ? find_held_lock+0x2c/0x110 [ 30.814980] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.815548] ? lock_is_held_type+0x9f/0x120 [ 30.816117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.816742] ? mtree_range_walk+0x632/0x900 [ 30.817326] ? mas_walk+0x5c7/0x7c0 [ 30.817834] do_vmi_munmap+0x1f1/0x2b0 [ 30.818360] mmap_region+0x1f9/0x2660 [ 30.818871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.819420] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.820178] ? __pfx_lock_acquire+0x10/0x10 [ 30.820753] ? __pfx_mmap_region+0x10/0x10 [ 30.821315] ? security_mmap_addr+0x7d/0xa0 [ 30.821871] ? get_unmapped_area+0x1f5/0x3f0 [ 30.822449] do_mmap+0x854/0xf00 [ 30.822914] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.823442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.824057] ksys_mmap_pgoff+0x3af/0x500 [ 30.824597] do_syscall_64+0x3f/0x90 [ 30.825110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825795] RIP: 0033:0x7fc62e718d82 [ 30.826279] 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 [ 30.828514] RSP: 002b:00007ffc8b52b478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.829470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc62e718d82 [ 30.830358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc62db52000 [ 30.831251] RBP: 00007fc62db52000 R08: 0000000000000009 R09: 0000000000001000 [ 30.832159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f602379d90 [ 30.833045] R13: 00007ffc8b52b490 R14: 00007ffc8b52b4c0 R15: 00007ffc8b52b820 [ 30.833952] [ 30.834261] [ 30.834492] Allocated by task 213: [ 30.834956] kasan_save_stack+0x22/0x50 [ 30.835492] kasan_set_track+0x25/0x30 [ 30.836038] __kasan_slab_alloc+0x59/0x70 [ 30.836596] kmem_cache_alloc+0x16b/0x370 [ 30.837146] vm_area_dup+0x20/0x160 [ 30.837628] __split_vma+0x170/0x950 [ 30.838128] split_vma+0xc6/0x110 [ 30.838589] mprotect_fixup+0x8d2/0xb30 [ 30.839119] do_mprotect_pkey+0x87e/0xd40 [ 30.839667] __x64_sys_mprotect+0x78/0xc0 [ 30.840231] do_syscall_64+0x3f/0x90 [ 30.840740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.841426] [ 30.841666] Freed by task 213: [ 30.842085] kasan_save_stack+0x22/0x50 [ 30.842624] kasan_set_track+0x25/0x30 [ 30.843146] kasan_save_free_info+0x2b/0x50 [ 30.843706] __kasan_slab_free+0x10a/0x190 [ 30.844287] kmem_cache_free+0x10d/0x4d0 [ 30.844823] rcu_core+0x8c8/0x2860 [ 30.845291] __do_softirq+0x1b7/0x7d4 [ 30.845792] [ 30.846026] Last potentially related work creation: [ 30.846639] kasan_save_stack+0x22/0x50 [ 30.847171] __kasan_record_aux_stack+0x8e/0xa0 [ 30.847791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.848474] remove_vma+0x139/0x170 [ 30.848955] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.849545] do_vmi_munmap+0x1f1/0x2b0 [ 30.850063] __vm_munmap+0x138/0x3a0 [ 30.850568] __x64_sys_munmap+0x59/0x80 [ 30.851088] do_syscall_64+0x3f/0x90 [ 30.851601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852296] [ 30.852540] Second to last potentially related work creation: [ 30.853251] kasan_save_stack+0x22/0x50 [ 30.853793] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855079] remove_vma+0x139/0x170 [ 30.855563] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856173] do_vmi_munmap+0x1f1/0x2b0 [ 30.856693] mmap_region+0x1f9/0x2660 [ 30.857205] do_mmap+0x854/0xf00 [ 30.857662] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.858182] ksys_mmap_pgoff+0x3af/0x500 [ 30.858721] do_syscall_64+0x3f/0x90 [ 30.859229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859921] [ 30.860153] The buggy address belongs to the object at ffff88800e429740 [ 30.860153] which belongs to the cache vm_area_struct of size 168 [ 30.861696] The buggy address is located 88 bytes inside of [ 30.861696] freed 168-byte region [ffff88800e429740, ffff88800e4297e8) [ 30.863167] [ 30.863398] The buggy address belongs to the physical page: [ 30.864115] page:00000000163dac78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe429 [ 30.865259] memcg:ffff88800cc19501 [ 30.865708] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.866439] page_type: 0xffffffff() [ 30.866916] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.867904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc19501 [ 30.868863] page dumped because: kasan: bad access detected [ 30.869562] [ 30.869788] Memory state around the buggy address: [ 30.870394] ffff88800e429680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871301] ffff88800e429700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.872229] >ffff88800e429780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.873125] ^ [ 30.873649] ffff88800e429800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.874541] ffff88800e429880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.875447] ================================================================== [ 30.876971] Disabling lock debugging due to kernel taint [ 33.704185] BUG: Bad rss-counter state mm:0000000073caa701 type:MM_FILEPAGES val:33 [ 33.705259] BUG: Bad rss-counter state mm:0000000073caa701 type:MM_ANONPAGES val:22 [ 34.240494] BUG: Bad rss-counter state mm:00000000c1cf698c type:MM_FILEPAGES val:33 [ 34.241725] BUG: Bad rss-counter state mm:00000000c1cf698c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9101' (ECDSA) to the list of known hosts. 2023/06/20 20:04:15 fuzzer started 2023/06/20 20:04:15 dialing manager at localhost:36067 2023/06/20 20:04:15 checking machine... 2023/06/20 20:04:15 checking revisions... [ 34.929063] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:04:15 testing simple program... [ 34.977631] cgroup: Unknown subsys name 'net' [ 35.035172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:04:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c6a2 RCX=ffffffff860d8201 RDX=1ffff11002df5ea2 RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffffffff8180c6a2 RSP=ffff888016faf460 R8 =ffffffff860d825a R9 =ffff888016faf4f8 R10=0000000000038001 R11=0000000000010b8d R12=ffff888016faf580 R13=0000000000000000 R14=ffff888015a451c0 R15=0000000000000000 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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 00007f315ada3700 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=000055b5d9fcd748 CR3=000000000e9f6000 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=2035313a34303a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff888016d79f34 RBP=ffff888016d79b40 RSP=ffff88801583f8e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000cc0 RIP=ffffffff813744e1 RFL=00000213 [----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 00007fe0bebd0900 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=00007fe0bdfe7480 CR3=000000000d862000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=caa9f6b63b711c3e00000000000ae988 XMM05=130bd476704240ef0000000000133628 XMM06=19e9129bd510f23500000000001324c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000