syzkaller login: [ 30.185809] BUG: Bad rss-counter state mm:000000006e74980c type:MM_FILEPAGES val:33 [ 30.187023] BUG: Bad rss-counter state mm:000000006e74980c type:MM_ANONPAGES val:22 [ 30.229356] ================================================================== [ 30.230566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.231593] Read of size 8 at addr ffff888018077ed8 by task sshd/220 [ 30.232510] [ 30.232729] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.233706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.234716] Call Trace: [ 30.235125] [ 30.235413] dump_stack_lvl+0x91/0xf0 [ 30.236013] print_report+0xcc/0x620 [ 30.236563] ? __virt_addr_valid+0x102/0x340 [ 30.237121] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.237756] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238370] kasan_report+0xbe/0xf0 [ 30.238853] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239482] vma_interval_tree_remove+0xc75/0xec0 [ 30.240090] vma_prepare+0xc54/0x11a0 [ 30.240567] __split_vma+0x5af/0x950 [ 30.241037] ? __pfx___split_vma+0x10/0x10 [ 30.241588] ? find_held_lock+0x2c/0x110 [ 30.242117] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.242682] ? lock_is_held_type+0x9f/0x120 [ 30.243226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.243835] ? mtree_range_walk+0x632/0x900 [ 30.244387] ? mas_walk+0x5c7/0x7c0 [ 30.244861] do_vmi_munmap+0x1f1/0x2b0 [ 30.245354] mmap_region+0x1f9/0x2660 [ 30.245848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.246365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.247089] ? __pfx_lock_acquire+0x10/0x10 [ 30.247628] ? __pfx_mmap_region+0x10/0x10 [ 30.248163] ? security_mmap_addr+0x7d/0xa0 [ 30.248692] ? get_unmapped_area+0x1f5/0x3f0 [ 30.249255] do_mmap+0x854/0xf00 [ 30.249720] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.250222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.250785] ksys_mmap_pgoff+0x3af/0x500 [ 30.251307] do_syscall_64+0x3f/0x90 [ 30.251786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.252436] RIP: 0033:0x7f1260881d82 [ 30.252895] 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 [ 30.255036] RSP: 002b:00007ffe5cff58e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.255939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1260881d82 [ 30.256789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f125fcbb000 [ 30.257636] RBP: 00007f125fcbb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.258491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2b8cf9ec0 [ 30.259328] R13: 00007ffe5cff5900 R14: 00007ffe5cff5930 R15: 00007ffe5cff5c90 [ 30.260196] [ 30.260490] [ 30.260710] Allocated by task 213: [ 30.261141] kasan_save_stack+0x22/0x50 [ 30.261664] kasan_set_track+0x25/0x30 [ 30.262162] __kasan_slab_alloc+0x59/0x70 [ 30.262692] kmem_cache_alloc+0x16b/0x370 [ 30.263216] vm_area_dup+0x20/0x160 [ 30.263684] __split_vma+0x170/0x950 [ 30.264163] split_vma+0xc6/0x110 [ 30.264614] mprotect_fixup+0x8d2/0xb30 [ 30.265129] do_mprotect_pkey+0x87e/0xd40 [ 30.265665] __x64_sys_mprotect+0x78/0xc0 [ 30.266185] do_syscall_64+0x3f/0x90 [ 30.266663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267316] [ 30.267530] Freed by task 13: [ 30.267920] kasan_save_stack+0x22/0x50 [ 30.268425] kasan_set_track+0x25/0x30 [ 30.268923] kasan_save_free_info+0x2b/0x50 [ 30.269459] __kasan_slab_free+0x10a/0x190 [ 30.270011] kmem_cache_free+0x10d/0x4d0 [ 30.270603] rcu_core+0x8c8/0x2860 [ 30.271053] __do_softirq+0x1b7/0x7d4 [ 30.271536] [ 30.271750] Last potentially related work creation: [ 30.272333] kasan_save_stack+0x22/0x50 [ 30.272839] __kasan_record_aux_stack+0x8e/0xa0 [ 30.273423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.274082] remove_vma+0x139/0x170 [ 30.274534] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.275095] do_vmi_munmap+0x1f1/0x2b0 [ 30.275582] __vm_munmap+0x138/0x3a0 [ 30.276055] __x64_sys_munmap+0x59/0x80 [ 30.276554] do_syscall_64+0x3f/0x90 [ 30.277031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.277693] [ 30.277911] The buggy address belongs to the object at ffff888018077e80 [ 30.277911] which belongs to the cache vm_area_struct of size 168 [ 30.279370] The buggy address is located 88 bytes inside of [ 30.279370] freed 168-byte region [ffff888018077e80, ffff888018077f28) [ 30.280781] [ 30.281005] The buggy address belongs to the physical page: [ 30.281676] page:00000000eb49b9cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18077 [ 30.282770] memcg:ffff888018071101 [ 30.283199] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.283851] page_type: 0xffffffff() [ 30.284306] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.285226] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018071101 [ 30.286137] page dumped because: kasan: bad access detected [ 30.286799] [ 30.287016] Memory state around the buggy address: [ 30.287597] ffff888018077d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.288450] ffff888018077e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.289302] >ffff888018077e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.290166] ^ [ 30.290907] ffff888018077f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.291767] ffff888018077f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.292617] ================================================================== [ 30.293785] Disabling lock debugging due to kernel taint [ 32.359947] BUG: Bad rss-counter state mm:0000000079cd5e6a type:MM_FILEPAGES val:33 [ 32.361132] BUG: Bad rss-counter state mm:0000000079cd5e6a type:MM_ANONPAGES val:22 [ 32.766550] BUG: Bad rss-counter state mm:0000000071ff945f type:MM_FILEPAGES val:33 [ 32.767956] BUG: Bad rss-counter state mm:0000000071ff945f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63705' (ECDSA) to the list of known hosts. 2023/06/20 00:36:40 fuzzer started 2023/06/20 00:36:40 dialing manager at localhost:44161 2023/06/20 00:36:40 checking machine... 2023/06/20 00:36:40 checking revisions... [ 33.491402] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:36:40 testing simple program... [ 33.546450] cgroup: Unknown subsys name 'net' [ 33.589019] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:36:39 Registers: info registers vcpu 0 RAX=1ffff11001d10963 RBX=ffff88800e884b18 RCX=1ffff11001d1096a RDX=1ffff11001e40dd5 RSI=ffffffff87b86f80 RDI=ffff88800f206ea8 RBP=ffff88800e884b20 RSP=ffff88800d92f9e8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800f206ea8 R13=dffffc0000000000 R14=ffff88800f206e88 R15=ffff88800f206e40 RIP=ffffffff844cdcb3 RFL=00000046 [---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 00007f1a27383900 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=00007f1a2679ab90 CR3=000000000f13a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5c5250d78e43797600000000000ae988 XMM05=350dbde2dae881460000000000134b70 XMM06=19e9129bd510f2350000000000133a08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001e1ca85 RBX=ffff88800f0e53f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f0e5428 RBP=ffff88801aa5b0e8 RSP=ffff88800ef4f9d8 R8 =0000000000000001 R9 =ffffed1001de9f2f R10=0000000000000003 R11=ffffea0000567000 R12=dffffc0000000000 R13=ffff88801b8aa000 R14=0000000000000000 R15=ffff8880084c6140 RIP=ffffffff81846362 RFL=00000046 [---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 00007f7c00b85900 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=00007f7c00b64020 CR3=0000000016efe000 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=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