syzkaller login: [ 38.715555] BUG: Bad rss-counter state mm:000000003a3e7451 type:MM_FILEPAGES val:33 [ 38.716551] BUG: Bad rss-counter state mm:000000003a3e7451 type:MM_ANONPAGES val:22 [ 38.874358] ================================================================== [ 38.875293] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876250] Read of size 8 at addr ffff88800df43228 by task sshd/220 [ 38.877008] [ 38.877225] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.878295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879287] Call Trace: [ 38.879612] [ 38.879896] dump_stack_lvl+0x91/0xf0 [ 38.880406] print_report+0xcc/0x620 [ 38.880896] ? __virt_addr_valid+0x102/0x340 [ 38.881456] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882089] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882715] kasan_report+0xbe/0xf0 [ 38.883196] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883833] vma_interval_tree_remove+0xc75/0xec0 [ 38.884438] vma_prepare+0xc54/0x11a0 [ 38.884930] __split_vma+0x5af/0x950 [ 38.885419] ? __pfx___split_vma+0x10/0x10 [ 38.885973] ? find_held_lock+0x2c/0x110 [ 38.886514] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887088] ? lock_is_held_type+0x9f/0x120 [ 38.887636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.888251] ? mtree_range_walk+0x632/0x900 [ 38.888825] ? mas_walk+0x5c7/0x7c0 [ 38.889313] do_vmi_munmap+0x1f1/0x2b0 [ 38.889825] mmap_region+0x1f9/0x2660 [ 38.890315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.890833] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891561] ? __pfx_lock_acquire+0x10/0x10 [ 38.892110] ? __pfx_mmap_region+0x10/0x10 [ 38.892652] ? security_mmap_addr+0x7d/0xa0 [ 38.893190] ? get_unmapped_area+0x1f5/0x3f0 [ 38.893767] do_mmap+0x854/0xf00 [ 38.894214] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895297] ksys_mmap_pgoff+0x3af/0x500 [ 38.895807] do_syscall_64+0x3f/0x90 [ 38.896297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896959] RIP: 0033:0x7ff103d80d82 [ 38.897423] 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 [ 38.899594] RSP: 002b:00007ffec4848fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.900534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff103d80d82 [ 38.901412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1031ba000 [ 38.902296] RBP: 00007ff1031ba000 R08: 0000000000000009 R09: 0000000000001000 [ 38.903166] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d30ce81d90 [ 38.904034] R13: 00007ffec4848fe0 R14: 00007ffec4849010 R15: 00007ffec4849370 [ 38.904910] [ 38.905210] [ 38.905434] Allocated by task 213: [ 38.905878] kasan_save_stack+0x22/0x50 [ 38.906391] kasan_set_track+0x25/0x30 [ 38.906897] __kasan_slab_alloc+0x59/0x70 [ 38.907435] kmem_cache_alloc+0x16b/0x370 [ 38.907963] vm_area_dup+0x20/0x160 [ 38.908423] __split_vma+0x170/0x950 [ 38.908900] split_vma+0xc6/0x110 [ 38.909354] mprotect_fixup+0x8d2/0xb30 [ 38.909876] do_mprotect_pkey+0x87e/0xd40 [ 38.910410] __x64_sys_mprotect+0x78/0xc0 [ 38.910939] do_syscall_64+0x3f/0x90 [ 38.911423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912087] [ 38.912307] Freed by task 213: [ 38.912706] kasan_save_stack+0x22/0x50 [ 38.913217] kasan_set_track+0x25/0x30 [ 38.913745] kasan_save_free_info+0x2b/0x50 [ 38.914291] __kasan_slab_free+0x10a/0x190 [ 38.914840] kmem_cache_free+0x10d/0x4d0 [ 38.915354] rcu_core+0x8c8/0x2860 [ 38.915815] __do_softirq+0x1b7/0x7d4 [ 38.916301] [ 38.916517] Last potentially related work creation: [ 38.917117] kasan_save_stack+0x22/0x50 [ 38.917638] __kasan_record_aux_stack+0x8e/0xa0 [ 38.918235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918979] remove_vma+0x139/0x170 [ 38.919445] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920022] do_vmi_munmap+0x1f1/0x2b0 [ 38.920515] __vm_munmap+0x138/0x3a0 [ 38.921000] __x64_sys_munmap+0x59/0x80 [ 38.921503] do_syscall_64+0x3f/0x90 [ 38.922002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922658] [ 38.922878] The buggy address belongs to the object at ffff88800df431d0 [ 38.922878] which belongs to the cache vm_area_struct of size 168 [ 38.924386] The buggy address is located 88 bytes inside of [ 38.924386] freed 168-byte region [ffff88800df431d0, ffff88800df43278) [ 38.925845] [ 38.926066] The buggy address belongs to the physical page: [ 38.926735] page:00000000f6c40ba0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf43 [ 38.927844] memcg:ffff888018c5f001 [ 38.928286] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.928946] page_type: 0xffffffff() [ 38.929411] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.930370] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c5f001 [ 38.931303] page dumped because: kasan: bad access detected [ 38.931974] [ 38.932196] Memory state around the buggy address: [ 38.932791] ffff88800df43100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.933701] ffff88800df43180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.934585] >ffff88800df43200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.935459] ^ [ 38.936033] ffff88800df43280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.936911] ffff88800df43300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.937797] ================================================================== [ 38.938859] Disabling lock debugging due to kernel taint [ 41.213937] BUG: Bad rss-counter state mm:000000006d346f15 type:MM_FILEPAGES val:33 [ 41.215114] BUG: Bad rss-counter state mm:000000006d346f15 type:MM_ANONPAGES val:22 [ 41.721405] BUG: Bad rss-counter state mm:00000000019c44f6 type:MM_FILEPAGES val:33 [ 41.722886] BUG: Bad rss-counter state mm:00000000019c44f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35846' (ECDSA) to the list of known hosts. 2023/06/20 11:11:46 fuzzer started 2023/06/20 11:11:46 dialing manager at localhost:36067 2023/06/20 11:11:46 checking machine... 2023/06/20 11:11:46 checking revisions... [ 42.386428] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:11:46 testing simple program... [ 42.433774] cgroup: Unknown subsys name 'net' [ 42.484177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:11:46 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09d68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007fe17b08a700 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=00007f0539702650 CR3=0000000019c72000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36323535332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363235 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=ffffffff860b42b4 RBX=0000000000000001 RCX=ffffffff860b42b0 RDX=1ffff1100d9e1357 RSI=1ffff1100d9e1355 RDI=ffff88806cf09ab8 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff860b42b4 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000ab9c R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88800fda79f0 R15=ffff88806cf09a50 RIP=ffffffff81131106 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 00007f053914d900 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=00007f077f8f90f0 CR3=000000000e472000 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=2bd15e8cd436d3b8624d5743ead5dfe3 XMM02=eff9b2d0a8fce9cb000000000011b1a0 XMM03=2c67c8bc2e329bc3000000000011b2c8 XMM04=3052a12af61db68f00000000000ae988 XMM05=83a0a7007bf1c61300000000001332e8 XMM06=19e9129bd510f2350000000000131808 XMM07=fb795ef6d65770560000000000121c68 XMM08=2c67c8bc2e329bc3000000000011b2c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000