syzkaller login: [ 31.156275] BUG: Bad rss-counter state mm:00000000b166e8c6 type:MM_FILEPAGES val:33 [ 31.157618] BUG: Bad rss-counter state mm:00000000b166e8c6 type:MM_ANONPAGES val:22 [ 31.196095] ================================================================== [ 31.197196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.198323] Read of size 8 at addr ffff888019a25310 by task sshd/220 [ 31.199374] [ 31.199620] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.200630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.201732] Call Trace: [ 31.202091] [ 31.202450] dump_stack_lvl+0x91/0xf0 [ 31.202976] print_report+0xcc/0x620 [ 31.203481] ? __virt_addr_valid+0x102/0x340 [ 31.204058] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204715] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205369] kasan_report+0xbe/0xf0 [ 31.205875] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206521] vma_interval_tree_remove+0xc75/0xec0 [ 31.207164] vma_prepare+0xc54/0x11a0 [ 31.207666] __split_vma+0x5af/0x950 [ 31.208162] ? __pfx___split_vma+0x10/0x10 [ 31.208738] ? find_held_lock+0x2c/0x110 [ 31.209287] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.209876] ? lock_is_held_type+0x9f/0x120 [ 31.210445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211087] ? mtree_range_walk+0x632/0x900 [ 31.211666] ? mas_walk+0x5c7/0x7c0 [ 31.212172] do_vmi_munmap+0x1f1/0x2b0 [ 31.212693] mmap_region+0x1f9/0x2660 [ 31.213207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.214496] ? __pfx_lock_acquire+0x10/0x10 [ 31.215060] ? __pfx_mmap_region+0x10/0x10 [ 31.215611] ? security_mmap_addr+0x7d/0xa0 [ 31.216169] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216752] do_mmap+0x854/0xf00 [ 31.217225] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218349] ksys_mmap_pgoff+0x3af/0x500 [ 31.218888] do_syscall_64+0x3f/0x90 [ 31.219387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220076] RIP: 0033:0x7fa9de6fed82 [ 31.220566] 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 [ 31.222669] RSP: 002b:00007ffc5dc966b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223571] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9de6fed82 [ 31.224408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9ddb38000 [ 31.225266] RBP: 00007fa9ddb38000 R08: 0000000000000009 R09: 0000000000001000 [ 31.226103] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c2f893f70 [ 31.226948] R13: 00007ffc5dc966d0 R14: 00007ffc5dc96700 R15: 00007ffc5dc96a60 [ 31.227796] [ 31.228083] [ 31.228302] Allocated by task 213: [ 31.228756] kasan_save_stack+0x22/0x50 [ 31.229269] kasan_set_track+0x25/0x30 [ 31.229769] __kasan_slab_alloc+0x59/0x70 [ 31.230299] kmem_cache_alloc+0x16b/0x370 [ 31.230815] vm_area_dup+0x20/0x160 [ 31.231275] __split_vma+0x170/0x950 [ 31.231743] split_vma+0xc6/0x110 [ 31.232194] mprotect_fixup+0x8d2/0xb30 [ 31.232712] do_mprotect_pkey+0x87e/0xd40 [ 31.233244] __x64_sys_mprotect+0x78/0xc0 [ 31.233771] do_syscall_64+0x3f/0x90 [ 31.234257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234914] [ 31.235126] Freed by task 213: [ 31.235530] kasan_save_stack+0x22/0x50 [ 31.236018] kasan_set_track+0x25/0x30 [ 31.236542] kasan_save_free_info+0x2b/0x50 [ 31.237084] __kasan_slab_free+0x10a/0x190 [ 31.237669] kmem_cache_free+0x10d/0x4d0 [ 31.238188] rcu_core+0x8c8/0x2860 [ 31.238639] __do_softirq+0x1b7/0x7d4 [ 31.239118] [ 31.239336] Last potentially related work creation: [ 31.239926] kasan_save_stack+0x22/0x50 [ 31.240437] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241682] remove_vma+0x139/0x170 [ 31.242133] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242687] do_vmi_munmap+0x1f1/0x2b0 [ 31.243177] __vm_munmap+0x138/0x3a0 [ 31.243648] __x64_sys_munmap+0x59/0x80 [ 31.244148] do_syscall_64+0x3f/0x90 [ 31.244626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245266] [ 31.245484] The buggy address belongs to the object at ffff888019a252b8 [ 31.245484] which belongs to the cache vm_area_struct of size 168 [ 31.246957] The buggy address is located 88 bytes inside of [ 31.246957] freed 168-byte region [ffff888019a252b8, ffff888019a25360) [ 31.248377] [ 31.248606] The buggy address belongs to the physical page: [ 31.249252] page:000000003ae723aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a25 [ 31.250341] memcg:ffff88800e7ba501 [ 31.250765] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251413] page_type: 0xffffffff() [ 31.251858] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.252793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7ba501 [ 31.253699] page dumped because: kasan: bad access detected [ 31.254377] [ 31.254591] Memory state around the buggy address: [ 31.255177] ffff888019a25200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.256052] ffff888019a25280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.256930] >ffff888019a25300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.257792] ^ [ 31.258267] ffff888019a25380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.259124] ffff888019a25400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.259976] ================================================================== [ 31.260996] Disabling lock debugging due to kernel taint [ 33.428610] BUG: Bad rss-counter state mm:00000000bc338851 type:MM_FILEPAGES val:33 [ 33.429451] BUG: Bad rss-counter state mm:00000000bc338851 type:MM_ANONPAGES val:22 [ 34.018134] BUG: Bad rss-counter state mm:000000001f9dbfce type:MM_FILEPAGES val:33 [ 34.019278] BUG: Bad rss-counter state mm:000000001f9dbfce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14927' (ECDSA) to the list of known hosts. 2023/06/21 01:15:47 fuzzer started 2023/06/21 01:15:47 dialing manager at localhost:36067 2023/06/21 01:15:47 checking machine... 2023/06/21 01:15:47 checking revisions... [ 34.636237] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:15:47 testing simple program... [ 34.676495] cgroup: Unknown subsys name 'net' [ 34.730365] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88807ffd7020 RCX=ffffffff811432de RDX=ffff888015c251c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000017b8ed00 RSP=ffff888016a0f9e8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff88801cc0d640 RIP=ffffffff814c0860 RFL=00000202 [-------] 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 00007f0e86166900 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=00007ffc67159000 CR3=000000000e978000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0b5ef2fd00 CR3=000000000f09c000 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=67c5e7ab737197baea4e593668c8d2ab XMM02=000000000011c700ec2efd57dc4c00df XMM03=0000000000123b38fa0c184c65b80716 XMM04=bdb46ec34f59495600000000000ae988 XMM05=5a9d233068761c4a0000000000133230 XMM06=4d976a024ad187850000000000132098 XMM07=e042d86d42eb936e0000000000123db8 XMM08=fa0c184c65b80716000000000011c760 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000