syzkaller login: [ 28.665581] BUG: Bad rss-counter state mm:000000009b356393 type:MM_FILEPAGES val:33 [ 28.667525] BUG: Bad rss-counter state mm:000000009b356393 type:MM_ANONPAGES val:22 [ 28.832798] ================================================================== [ 28.833840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.834784] Read of size 8 at addr ffff8880190796b0 by task sshd/220 [ 28.835736] [ 28.835956] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.836843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.837829] Call Trace: [ 28.838148] [ 28.838429] dump_stack_lvl+0x91/0xf0 [ 28.838925] print_report+0xcc/0x620 [ 28.839417] ? __virt_addr_valid+0x102/0x340 [ 28.839973] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.840592] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.841239] kasan_report+0xbe/0xf0 [ 28.841717] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.842342] vma_interval_tree_remove+0xc75/0xec0 [ 28.842940] vma_prepare+0xc54/0x11a0 [ 28.843414] __split_vma+0x5af/0x950 [ 28.843879] ? __pfx___split_vma+0x10/0x10 [ 28.844398] ? find_held_lock+0x2c/0x110 [ 28.844931] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.845495] ? lock_is_held_type+0x9f/0x120 [ 28.846026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.846623] ? mtree_range_walk+0x632/0x900 [ 28.847176] ? mas_walk+0x5c7/0x7c0 [ 28.847647] do_vmi_munmap+0x1f1/0x2b0 [ 28.848144] mmap_region+0x1f9/0x2660 [ 28.848623] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.849139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.849854] ? __pfx_lock_acquire+0x10/0x10 [ 28.850379] ? __pfx_mmap_region+0x10/0x10 [ 28.850912] ? security_mmap_addr+0x7d/0xa0 [ 28.851436] ? get_unmapped_area+0x1f5/0x3f0 [ 28.851989] do_mmap+0x854/0xf00 [ 28.852428] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.852968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.853547] ksys_mmap_pgoff+0x3af/0x500 [ 28.854076] do_syscall_64+0x3f/0x90 [ 28.854553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.855195] RIP: 0033:0x7fa75cd9dd82 [ 28.855651] 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 [ 28.857787] RSP: 002b:00007ffd29cfad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.858696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa75cd9dd82 [ 28.859538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa75c1d7000 [ 28.860381] RBP: 00007fa75c1d7000 R08: 0000000000000009 R09: 0000000000001000 [ 28.861248] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb02dc9ec0 [ 28.862091] R13: 00007ffd29cfad80 R14: 00007ffd29cfadb0 R15: 00007ffd29cfb110 [ 28.862937] [ 28.863226] [ 28.863437] Allocated by task 213: [ 28.863864] kasan_save_stack+0x22/0x50 [ 28.864364] kasan_set_track+0x25/0x30 [ 28.864867] __kasan_slab_alloc+0x59/0x70 [ 28.865381] kmem_cache_alloc+0x16b/0x370 [ 28.865900] vm_area_dup+0x20/0x160 [ 28.866347] __split_vma+0x170/0x950 [ 28.866813] split_vma+0xc6/0x110 [ 28.867253] mprotect_fixup+0x8d2/0xb30 [ 28.867752] do_mprotect_pkey+0x87e/0xd40 [ 28.868271] __x64_sys_mprotect+0x78/0xc0 [ 28.868809] do_syscall_64+0x3f/0x90 [ 28.869289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.869923] [ 28.870142] Freed by task 213: [ 28.870528] kasan_save_stack+0x22/0x50 [ 28.871024] kasan_set_track+0x25/0x30 [ 28.871512] kasan_save_free_info+0x2b/0x50 [ 28.872049] __kasan_slab_free+0x10a/0x190 [ 28.872576] kmem_cache_free+0x10d/0x4d0 [ 28.873102] rcu_core+0x8c8/0x2860 [ 28.873539] __do_softirq+0x1b7/0x7d4 [ 28.874014] [ 28.874226] Last potentially related work creation: [ 28.874813] kasan_save_stack+0x22/0x50 [ 28.875313] __kasan_record_aux_stack+0x8e/0xa0 [ 28.875885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.876515] remove_vma+0x139/0x170 [ 28.877066] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.877624] do_vmi_munmap+0x1f1/0x2b0 [ 28.878111] __vm_munmap+0x138/0x3a0 [ 28.878578] __x64_sys_munmap+0x59/0x80 [ 28.879070] do_syscall_64+0x3f/0x90 [ 28.879539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.880189] [ 28.880401] The buggy address belongs to the object at ffff888019079658 [ 28.880401] which belongs to the cache vm_area_struct of size 168 [ 28.881868] The buggy address is located 88 bytes inside of [ 28.881868] freed 168-byte region [ffff888019079658, ffff888019079700) [ 28.883341] [ 28.883572] The buggy address belongs to the physical page: [ 28.884223] page:00000000c5d9a3b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19079 [ 28.885319] memcg:ffff88800fbda701 [ 28.885745] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.886379] page_type: 0xffffffff() [ 28.886827] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.887736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbda701 [ 28.888639] page dumped because: kasan: bad access detected [ 28.889313] [ 28.889529] Memory state around the buggy address: [ 28.890103] ffff888019079580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.890958] ffff888019079600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.891833] >ffff888019079680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.892707] ^ [ 28.893284] ffff888019079700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.894143] ffff888019079780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.895001] ================================================================== [ 28.895919] Disabling lock debugging due to kernel taint [ 30.902769] BUG: Bad rss-counter state mm:000000006fdf0061 type:MM_FILEPAGES val:33 [ 30.903766] BUG: Bad rss-counter state mm:000000006fdf0061 type:MM_ANONPAGES val:22 [ 31.457817] BUG: Bad rss-counter state mm:000000005ddbc891 type:MM_FILEPAGES val:33 [ 31.459004] BUG: Bad rss-counter state mm:000000005ddbc891 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50259' (ECDSA) to the list of known hosts. 2023/06/20 21:06:47 fuzzer started 2023/06/20 21:06:47 dialing manager at localhost:36067 2023/06/20 21:06:47 checking machine... 2023/06/20 21:06:47 checking revisions... [ 32.115896] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:06:47 testing simple program... [ 32.164915] cgroup: Unknown subsys name 'net' [ 32.206715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:06:46 Registers: info registers vcpu 0 RAX=ffffffff8608a55b RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d9f9d0 RSP=ffff888008d9f8b8 R8 =ffffffff8608a55a R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9f9b9 R15=ffff888008d9f978 RIP=ffffffff81130abf 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 0000000000000000 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=00007f98f7ddf650 CR3=0000000015dc4000 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=36303a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383333 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8126abb5 RDX=1ffff110011c6f69 RSI=ffff888008e37b44 RDI=ffff888008e37b48 RBP=ffff888008e37bf0 RSP=ffff888008e37a18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04400 R12=ffff888008dcc180 R13=0000000000000001 R14=ffff888008c04400 R15=ffff888008e37ca0 RIP=ffffffff8126e9a3 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 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=00007f98f7de20b0 CR3=000000000fcd4000 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=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