syzkaller login: [ 40.151584] BUG: Bad rss-counter state mm:00000000a270d58d type:MM_FILEPAGES val:33 [ 40.152676] BUG: Bad rss-counter state mm:00000000a270d58d type:MM_ANONPAGES val:22 [ 40.305345] ================================================================== [ 40.306288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.307250] Read of size 8 at addr ffff88800f71a140 by task sshd/231 [ 40.308036] [ 40.308353] CPU: 1 PID: 231 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.309253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.310239] Call Trace: [ 40.310563] [ 40.310871] dump_stack_lvl+0x91/0xf0 [ 40.311382] print_report+0xcc/0x620 [ 40.311867] ? __virt_addr_valid+0x102/0x340 [ 40.312438] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.313058] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.313678] kasan_report+0xbe/0xf0 [ 40.314154] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.314783] vma_interval_tree_remove+0xc75/0xec0 [ 40.315400] vma_prepare+0xc54/0x11a0 [ 40.315882] __split_vma+0x5af/0x950 [ 40.316377] ? __pfx___split_vma+0x10/0x10 [ 40.316909] ? find_held_lock+0x2c/0x110 [ 40.317437] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.318009] ? lock_is_held_type+0x9f/0x120 [ 40.318559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.319170] ? mtree_range_walk+0x632/0x900 [ 40.319723] ? mas_walk+0x5c7/0x7c0 [ 40.320220] do_vmi_munmap+0x1f1/0x2b0 [ 40.320722] mmap_region+0x1f9/0x2660 [ 40.321212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.321730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.322456] ? __pfx_lock_acquire+0x10/0x10 [ 40.322993] ? __pfx_mmap_region+0x10/0x10 [ 40.323527] ? security_mmap_addr+0x7d/0xa0 [ 40.324072] ? get_unmapped_area+0x1f5/0x3f0 [ 40.324623] do_mmap+0x854/0xf00 [ 40.325067] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.325562] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.326129] ksys_mmap_pgoff+0x3af/0x500 [ 40.326640] do_syscall_64+0x3f/0x90 [ 40.327121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.327767] RIP: 0033:0x7f6d04726d82 [ 40.328237] 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 [ 40.330387] RSP: 002b:00007fffd63d60f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.331300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d04726d82 [ 40.332174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d03b60000 [ 40.333022] RBP: 00007f6d03b60000 R08: 0000000000000009 R09: 0000000000001000 [ 40.333888] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643017c9f70 [ 40.334744] R13: 00007fffd63d6110 R14: 00007fffd63d6140 R15: 00007fffd63d64a0 [ 40.335611] [ 40.335913] [ 40.336133] Allocated by task 224: [ 40.336566] kasan_save_stack+0x22/0x50 [ 40.337072] kasan_set_track+0x25/0x30 [ 40.337573] __kasan_slab_alloc+0x59/0x70 [ 40.338100] kmem_cache_alloc+0x16b/0x370 [ 40.338626] vm_area_dup+0x20/0x160 [ 40.339078] __split_vma+0x170/0x950 [ 40.339546] split_vma+0xc6/0x110 [ 40.340001] mprotect_fixup+0x8d2/0xb30 [ 40.340512] do_mprotect_pkey+0x87e/0xd40 [ 40.341036] __x64_sys_mprotect+0x78/0xc0 [ 40.341564] do_syscall_64+0x3f/0x90 [ 40.342037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.342684] [ 40.342903] Freed by task 224: [ 40.343298] kasan_save_stack+0x22/0x50 [ 40.343800] kasan_set_track+0x25/0x30 [ 40.344321] kasan_save_free_info+0x2b/0x50 [ 40.344864] __kasan_slab_free+0x10a/0x190 [ 40.345404] kmem_cache_free+0x10d/0x4d0 [ 40.345915] rcu_core+0x8c8/0x2860 [ 40.346366] __do_softirq+0x1b7/0x7d4 [ 40.346848] [ 40.347063] Last potentially related work creation: [ 40.347659] kasan_save_stack+0x22/0x50 [ 40.348177] __kasan_record_aux_stack+0x8e/0xa0 [ 40.348760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.349413] remove_vma+0x139/0x170 [ 40.349947] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.350504] do_vmi_munmap+0x1f1/0x2b0 [ 40.350999] __vm_munmap+0x138/0x3a0 [ 40.351467] __x64_sys_munmap+0x59/0x80 [ 40.351996] do_syscall_64+0x3f/0x90 [ 40.352479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.353126] [ 40.353341] The buggy address belongs to the object at ffff88800f71a0e8 [ 40.353341] which belongs to the cache vm_area_struct of size 168 [ 40.354839] The buggy address is located 88 bytes inside of [ 40.354839] freed 168-byte region [ffff88800f71a0e8, ffff88800f71a190) [ 40.356263] [ 40.356486] The buggy address belongs to the physical page: [ 40.357148] page:0000000069411ca1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf71a [ 40.358251] memcg:ffff88800d82da01 [ 40.358677] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.359327] page_type: 0xffffffff() [ 40.359791] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.360727] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d82da01 [ 40.361629] page dumped because: kasan: bad access detected [ 40.362287] [ 40.362505] Memory state around the buggy address: [ 40.363084] ffff88800f71a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.363944] ffff88800f71a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.364813] >ffff88800f71a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.365666] ^ [ 40.366307] ffff88800f71a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.367162] ffff88800f71a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.368028] ================================================================== [ 40.368959] Disabling lock debugging due to kernel taint [ 42.767079] BUG: Bad rss-counter state mm:000000007ea314c5 type:MM_FILEPAGES val:33 [ 42.767718] BUG: Bad rss-counter state mm:000000007ea314c5 type:MM_ANONPAGES val:22 [ 43.134169] BUG: Bad rss-counter state mm:0000000000644361 type:MM_FILEPAGES val:33 [ 43.134867] BUG: Bad rss-counter state mm:0000000000644361 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26410' (ECDSA) to the list of known hosts. 2023/06/20 05:06:22 fuzzer started 2023/06/20 05:06:22 dialing manager at localhost:44161 2023/06/20 05:06:22 checking machine... 2023/06/20 05:06:22 checking revisions... [ 43.785845] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:06:23 testing simple program... [ 43.852304] cgroup: Unknown subsys name 'net' [ 43.908471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:06:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016e6f19a RSP=ffff888016e6f0e8 R8 =ffffffff864b9d5a R9 =ffff888016e6f198 R10=0000000000038001 R11=00000000000b6996 R12=ffff888016e6f1b8 R13=ffff888016e6f1a0 R14=ffff888016e6ff58 R15=ffff888016e6f158 RIP=ffffffff81131916 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 00007fa58cdc8900 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=00007fa58cda7020 CR3=0000000016cc8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f3bf8555c10 CR3=000000000d872000 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=285985c0dfc7abb95342fef23e6c5667 XMM02=000000000011d690ec2efd57dc4c00df XMM03=0000000000124050c9c14d14b2f63598 XMM04=b439660d905e496800000000000ae988 XMM05=090f1556b20111b30000000000133880 XMM06=ded07c8b69031c2b0000000000132a58 XMM07=e042d86d42eb936e0000000000124328 XMM08=c9c14d14b2f63598000000000011d6f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000