syzkaller login: [ 30.492302] BUG: Bad rss-counter state mm:0000000028a9617d type:MM_FILEPAGES val:33 [ 30.493498] BUG: Bad rss-counter state mm:0000000028a9617d type:MM_ANONPAGES val:22 [ 30.620094] ================================================================== [ 30.620769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.621378] Read of size 8 at addr ffff888017d1a880 by task sshd/221 [ 30.621882] [ 30.622032] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.622629] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.623290] Call Trace: [ 30.623510] <TASK> [ 30.623712] dump_stack_lvl+0x91/0xf0 [ 30.624065] print_report+0xcc/0x620 [ 30.624443] ? __virt_addr_valid+0x102/0x340 [ 30.625086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.625535] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.625943] kasan_report+0xbe/0xf0 [ 30.626267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.626695] vma_interval_tree_remove+0xc75/0xec0 [ 30.627187] vma_prepare+0xc54/0x11a0 [ 30.627560] __split_vma+0x5af/0x950 [ 30.627897] ? __pfx___split_vma+0x10/0x10 [ 30.628264] ? find_held_lock+0x2c/0x110 [ 30.628674] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.629057] ? lock_is_held_type+0x9f/0x120 [ 30.629475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.629904] ? mtree_range_walk+0x632/0x900 [ 30.630286] ? mas_walk+0x5c7/0x7c0 [ 30.630633] do_vmi_munmap+0x1f1/0x2b0 [ 30.630983] mmap_region+0x1f9/0x2660 [ 30.631315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.631681] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.632172] ? __pfx_lock_acquire+0x10/0x10 [ 30.632562] ? __pfx_mmap_region+0x10/0x10 [ 30.632923] ? security_mmap_addr+0x7d/0xa0 [ 30.633337] ? get_unmapped_area+0x1f5/0x3f0 [ 30.633726] do_mmap+0x854/0xf00 [ 30.634023] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.634408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.634796] ksys_mmap_pgoff+0x3af/0x500 [ 30.635144] do_syscall_64+0x3f/0x90 [ 30.635487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635941] RIP: 0033:0x7f4944bbed82 [ 30.636279] 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 [ 30.637807] RSP: 002b:00007ffd80aa91a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.638425] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4944bbed82 [ 30.639053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4943ff8000 [ 30.639667] RBP: 00007f4943ff8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.640237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556534cdef70 [ 30.640904] R13: 00007ffd80aa91c0 R14: 00007ffd80aa91f0 R15: 00007ffd80aa9550 [ 30.641565] </TASK> [ 30.641766] [ 30.641915] Allocated by task 213: [ 30.642214] kasan_save_stack+0x22/0x50 [ 30.642576] kasan_set_track+0x25/0x30 [ 30.642919] __kasan_slab_alloc+0x59/0x70 [ 30.643294] kmem_cache_alloc+0x16b/0x370 [ 30.643660] vm_area_dup+0x20/0x160 [ 30.643989] __split_vma+0x170/0x950 [ 30.644349] split_vma+0xc6/0x110 [ 30.644691] mprotect_fixup+0x8d2/0xb30 [ 30.645027] do_mprotect_pkey+0x87e/0xd40 [ 30.645448] __x64_sys_mprotect+0x78/0xc0 [ 30.645809] do_syscall_64+0x3f/0x90 [ 30.646137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.646580] [ 30.646732] Freed by task 203: [ 30.647027] kasan_save_stack+0x22/0x50 [ 30.647380] kasan_set_track+0x25/0x30 [ 30.647727] kasan_save_free_info+0x2b/0x50 [ 30.648099] __kasan_slab_free+0x10a/0x190 [ 30.648542] kmem_cache_free+0x10d/0x4d0 [ 30.648912] rcu_core+0x8c8/0x2860 [ 30.649221] __do_softirq+0x1b7/0x7d4 [ 30.649605] [ 30.649753] Last potentially related work creation: [ 30.650156] kasan_save_stack+0x22/0x50 [ 30.650512] __kasan_record_aux_stack+0x8e/0xa0 [ 30.650918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.651344] remove_vma+0x139/0x170 [ 30.651649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.652045] do_vmi_munmap+0x1f1/0x2b0 [ 30.652457] __vm_munmap+0x138/0x3a0 [ 30.652779] __x64_sys_munmap+0x59/0x80 [ 30.653127] do_syscall_64+0x3f/0x90 [ 30.653499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.653953] [ 30.654102] The buggy address belongs to the object at ffff888017d1a828 [ 30.654102] which belongs to the cache vm_area_struct of size 168 [ 30.655086] The buggy address is located 88 bytes inside of [ 30.655086] freed 168-byte region [ffff888017d1a828, ffff888017d1a8d0) [ 30.656085] [ 30.656255] The buggy address belongs to the physical page: [ 30.656746] page:000000004d7dcdbd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d1a [ 30.657509] memcg:ffff88800f004401 [ 30.657771] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.658213] page_type: 0xffffffff() [ 30.658519] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.659137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f004401 [ 30.659767] page dumped because: kasan: bad access detected [ 30.660210] [ 30.660359] Memory state around the buggy address: [ 30.660791] ffff888017d1a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.661385] ffff888017d1a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.661956] >ffff888017d1a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.662508] ^ [ 30.662759] ffff888017d1a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.663324] ffff888017d1a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.663851] ================================================================== [ 30.664521] Disabling lock debugging due to kernel taint [ 32.158752] BUG: Bad rss-counter state mm:000000003a204e3b type:MM_FILEPAGES val:33 [ 32.159538] BUG: Bad rss-counter state mm:000000003a204e3b type:MM_ANONPAGES val:22 [ 32.466616] BUG: Bad rss-counter state mm:00000000fc0307ad type:MM_FILEPAGES val:33 [ 32.467377] BUG: Bad rss-counter state mm:00000000fc0307ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28444' (ECDSA) to the list of known hosts. 2023/06/21 09:51:34 fuzzer started 2023/06/21 09:51:34 dialing manager at localhost:36067 2023/06/21 09:51:34 checking machine... 2023/06/21 09:51:34 checking revisions... [ 33.023630] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:51:34 testing simple program... [ 33.057920] cgroup: Unknown subsys name 'net' [ 33.094550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:51:34 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000001c RCX=ffffffff811f7e37 RDX=000000000000001c RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801a38da00 RSP=ffff888017d8f8b0 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001c R11=63206e6f69737365 R12=ffffffff854f6380 R13=0000000000000000 R14=ffff88800893d648 R15=1ffff11002fb1f1d RIP=ffffffff814c0250 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 00007f98def47700 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=00007eff87e1b330 CR3=000000000c9e4000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034333a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343636 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=ffffffff818d9c06 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffffffff818d9c06 RDI=ffff88806cf09b18 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff8880167c8000 R15=ffff88800db2d300 RIP=ffffffff813ad474 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 00007fc1b7da4900 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=00007fc1b835b618 CR3=000000000e78e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000