syzkaller login: [ 38.723391] BUG: Bad rss-counter state mm:00000000be8413e8 type:MM_FILEPAGES val:33 [ 38.724784] BUG: Bad rss-counter state mm:00000000be8413e8 type:MM_ANONPAGES val:22 [ 38.880701] ================================================================== [ 38.881620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882575] Read of size 8 at addr ffff88800db3a798 by task sshd/219 [ 38.883348] [ 38.883672] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885524] Call Trace: [ 38.885893] [ 38.886176] dump_stack_lvl+0x91/0xf0 [ 38.886668] print_report+0xcc/0x620 [ 38.887163] ? __virt_addr_valid+0x102/0x340 [ 38.887723] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888360] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888978] kasan_report+0xbe/0xf0 [ 38.889463] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890096] vma_interval_tree_remove+0xc75/0xec0 [ 38.890701] vma_prepare+0xc54/0x11a0 [ 38.891176] __split_vma+0x5af/0x950 [ 38.891652] ? __pfx___split_vma+0x10/0x10 [ 38.892184] ? find_held_lock+0x2c/0x110 [ 38.892701] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893276] ? lock_is_held_type+0x9f/0x120 [ 38.893824] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894431] ? mtree_range_walk+0x632/0x900 [ 38.894984] ? mas_walk+0x5c7/0x7c0 [ 38.895458] do_vmi_munmap+0x1f1/0x2b0 [ 38.895952] mmap_region+0x1f9/0x2660 [ 38.896434] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897654] ? __pfx_lock_acquire+0x10/0x10 [ 38.898210] ? __pfx_mmap_region+0x10/0x10 [ 38.898741] ? security_mmap_addr+0x7d/0xa0 [ 38.899275] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899823] do_mmap+0x854/0xf00 [ 38.900265] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901337] ksys_mmap_pgoff+0x3af/0x500 [ 38.901851] do_syscall_64+0x3f/0x90 [ 38.902336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902989] RIP: 0033:0x7f97da265d82 [ 38.903463] 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 [ 38.905610] RSP: 002b:00007ffffd0c2a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97da265d82 [ 38.907379] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97d969f000 [ 38.908209] RBP: 00007f97d969f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909052] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ec099bec0 [ 38.909912] R13: 00007ffffd0c2a30 R14: 00007ffffd0c2a60 R15: 00007ffffd0c2dc0 [ 38.910757] [ 38.911048] [ 38.911267] Allocated by task 212: [ 38.911697] kasan_save_stack+0x22/0x50 [ 38.912205] kasan_set_track+0x25/0x30 [ 38.912701] __kasan_slab_alloc+0x59/0x70 [ 38.913220] kmem_cache_alloc+0x16b/0x370 [ 38.913746] vm_area_dup+0x20/0x160 [ 38.914216] __split_vma+0x170/0x950 [ 38.914686] split_vma+0xc6/0x110 [ 38.915136] mprotect_fixup+0x8d2/0xb30 [ 38.915648] do_mprotect_pkey+0x87e/0xd40 [ 38.916179] __x64_sys_mprotect+0x78/0xc0 [ 38.916707] do_syscall_64+0x3f/0x90 [ 38.917199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917863] [ 38.918081] Freed by task 212: [ 38.918484] kasan_save_stack+0x22/0x50 [ 38.919004] kasan_set_track+0x25/0x30 [ 38.919502] kasan_save_free_info+0x2b/0x50 [ 38.920049] __kasan_slab_free+0x10a/0x190 [ 38.920583] kmem_cache_free+0x10d/0x4d0 [ 38.921091] rcu_core+0x8c8/0x2860 [ 38.921528] __do_softirq+0x1b7/0x7d4 [ 38.922014] [ 38.922227] Last potentially related work creation: [ 38.922805] kasan_save_stack+0x22/0x50 [ 38.923312] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924528] remove_vma+0x139/0x170 [ 38.924978] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925534] do_vmi_munmap+0x1f1/0x2b0 [ 38.926034] __vm_munmap+0x138/0x3a0 [ 38.926501] __x64_sys_munmap+0x59/0x80 [ 38.926997] do_syscall_64+0x3f/0x90 [ 38.927468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928111] [ 38.928326] The buggy address belongs to the object at ffff88800db3a740 [ 38.928326] which belongs to the cache vm_area_struct of size 168 [ 38.929798] The buggy address is located 88 bytes inside of [ 38.929798] freed 168-byte region [ffff88800db3a740, ffff88800db3a7e8) [ 38.931179] [ 38.931395] The buggy address belongs to the physical page: [ 38.932042] page:00000000d7a44658 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb3a [ 38.933114] memcg:ffff88800ec5bf01 [ 38.933536] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.934184] page_type: 0xffffffff() [ 38.934632] raw: 0100000000000200 ffff8880087a0c80 ffffea000035e380 dead000000000002 [ 38.935538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec5bf01 [ 38.936438] page dumped because: kasan: bad access detected [ 38.937091] [ 38.937310] Memory state around the buggy address: [ 38.937903] ffff88800db3a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.938746] ffff88800db3a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.939595] >ffff88800db3a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.940467] ^ [ 38.940959] ffff88800db3a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.941819] ffff88800db3a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.942657] ================================================================== [ 38.943612] Disabling lock debugging due to kernel taint [ 41.432661] BUG: Bad rss-counter state mm:00000000ab5c286c type:MM_FILEPAGES val:33 [ 41.433895] BUG: Bad rss-counter state mm:00000000ab5c286c type:MM_ANONPAGES val:22 [ 41.900896] BUG: Bad rss-counter state mm:00000000575ac491 type:MM_FILEPAGES val:33 [ 41.901875] BUG: Bad rss-counter state mm:00000000575ac491 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64503' (ECDSA) to the list of known hosts. 2023/06/20 13:02:05 fuzzer started 2023/06/20 13:02:06 dialing manager at localhost:36067 2023/06/20 13:02:06 checking machine... 2023/06/20 13:02:06 checking revisions... [ 42.654806] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:02:06 testing simple program... [ 42.695997] cgroup: Unknown subsys name 'net' [ 42.742605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:02:05 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800d7d7818 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea0000363680 R14=ffffffff81eeadb0 R15=1ffff11001afaf1d RIP=ffffffff8180f189 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 00007fa75040f900 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=00007f79d236f298 CR3=000000000d5d6000 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=beabd0c96e928e931b4972ff07ed7a05 XMM02=000000000011b3c0eff9b2d0a8fce9cb XMM03=000000000011b4902c67c8bc2e329bc3 XMM04=0c5e6266600014a400000000000ae988 XMM05=a9a4b97a4c32e4d60000000000132dc0 XMM06=806171799158d9670000000000131840 XMM07=fb795ef6d65770560000000000121df0 XMM08=2c67c8bc2e329bc3000000000011b430 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000006d428980 RBX=000000000000de44 RCX=0000000000000001 RDX=000000000000001c RSI=ffffffff813c9c64 RDI=ffffffff85497f20 RBP=ffff88800ee878c0 RSP=ffff88800ee87838 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000006491a34d R13=dffffc0000000000 R14=1ffff11001dd0f18 R15=dffffc0000000000 RIP=ffffffff810a48a7 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 00007f45d96ba900 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=00007ffe5e1b1000 CR3=000000000c58e000 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=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