syzkaller login: [ 60.398870] BUG: Bad rss-counter state mm:000000002312eea2 type:MM_FILEPAGES val:33 [ 60.400293] BUG: Bad rss-counter state mm:000000002312eea2 type:MM_ANONPAGES val:22 [ 60.580997] ================================================================== [ 60.581890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.582815] Read of size 8 at addr ffff88800c538968 by task sshd/219 [ 60.583585] [ 60.583869] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.584734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.585702] Call Trace: [ 60.586043] [ 60.586332] dump_stack_lvl+0x91/0xf0 [ 60.586814] print_report+0xcc/0x620 [ 60.587302] ? __virt_addr_valid+0x102/0x340 [ 60.587885] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.588498] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.589114] kasan_report+0xbe/0xf0 [ 60.589595] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.590210] vma_interval_tree_remove+0xc75/0xec0 [ 60.590815] vma_prepare+0xc54/0x11a0 [ 60.591292] __split_vma+0x5af/0x950 [ 60.591772] ? __pfx___split_vma+0x10/0x10 [ 60.592305] ? find_held_lock+0x2c/0x110 [ 60.592823] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.593401] ? lock_is_held_type+0x9f/0x120 [ 60.593951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.594555] ? mtree_range_walk+0x632/0x900 [ 60.595103] ? mas_walk+0x5c7/0x7c0 [ 60.595590] do_vmi_munmap+0x1f1/0x2b0 [ 60.596085] mmap_region+0x1f9/0x2660 [ 60.596579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.597090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.597821] ? __pfx_lock_acquire+0x10/0x10 [ 60.598365] ? __pfx_mmap_region+0x10/0x10 [ 60.598897] ? security_mmap_addr+0x7d/0xa0 [ 60.599447] ? get_unmapped_area+0x1f5/0x3f0 [ 60.599999] do_mmap+0x854/0xf00 [ 60.600438] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.600935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.601496] ksys_mmap_pgoff+0x3af/0x500 [ 60.602000] do_syscall_64+0x3f/0x90 [ 60.602478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.603132] RIP: 0033:0x7f53940dcd82 [ 60.603596] 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 [ 60.605700] RSP: 002b:00007ffd1419f658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.606614] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53940dcd82 [ 60.607472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5393516000 [ 60.608318] RBP: 00007f5393516000 R08: 0000000000000009 R09: 0000000000001000 [ 60.609159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0f7cbef60 [ 60.610021] R13: 00007ffd1419f670 R14: 00007ffd1419f6a0 R15: 00007ffd1419fa00 [ 60.610918] [ 60.611205] [ 60.611435] Allocated by task 212: [ 60.611859] kasan_save_stack+0x22/0x50 [ 60.612359] kasan_set_track+0x25/0x30 [ 60.612857] __kasan_slab_alloc+0x59/0x70 [ 60.613382] kmem_cache_alloc+0x16b/0x370 [ 60.613904] vm_area_dup+0x20/0x160 [ 60.614374] __split_vma+0x170/0x950 [ 60.614839] split_vma+0xc6/0x110 [ 60.615276] mprotect_fixup+0x8d2/0xb30 [ 60.615795] do_mprotect_pkey+0x87e/0xd40 [ 60.616319] __x64_sys_mprotect+0x78/0xc0 [ 60.616839] do_syscall_64+0x3f/0x90 [ 60.617304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.617938] [ 60.618158] Freed by task 212: [ 60.618545] kasan_save_stack+0x22/0x50 [ 60.619042] kasan_set_track+0x25/0x30 [ 60.619563] kasan_save_free_info+0x2b/0x50 [ 60.620096] __kasan_slab_free+0x10a/0x190 [ 60.620626] kmem_cache_free+0x10d/0x4d0 [ 60.621125] rcu_core+0x8c8/0x2860 [ 60.621570] __do_softirq+0x1b7/0x7d4 [ 60.622049] [ 60.622268] Last potentially related work creation: [ 60.622849] kasan_save_stack+0x22/0x50 [ 60.623373] __kasan_record_aux_stack+0x8e/0xa0 [ 60.623968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.624619] remove_vma+0x139/0x170 [ 60.625081] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.625637] do_vmi_munmap+0x1f1/0x2b0 [ 60.626156] __vm_munmap+0x138/0x3a0 [ 60.626677] __x64_sys_munmap+0x59/0x80 [ 60.627174] do_syscall_64+0x3f/0x90 [ 60.627659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.628306] [ 60.628519] The buggy address belongs to the object at ffff88800c538910 [ 60.628519] which belongs to the cache vm_area_struct of size 168 [ 60.629988] The buggy address is located 88 bytes inside of [ 60.629988] freed 168-byte region [ffff88800c538910, ffff88800c5389b8) [ 60.631416] [ 60.631632] The buggy address belongs to the physical page: [ 60.632283] page:00000000d0bc52ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc538 [ 60.633384] memcg:ffff88800c689301 [ 60.633815] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.634464] page_type: 0xffffffff() [ 60.634920] raw: 0100000000000200 ffff88800879fc80 ffffea00005ae500 dead000000000008 [ 60.635835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c689301 [ 60.636755] page dumped because: kasan: bad access detected [ 60.637411] [ 60.637630] Memory state around the buggy address: [ 60.638216] ffff88800c538800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.639070] ffff88800c538880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.639939] >ffff88800c538900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.640773] ^ [ 60.641554] ffff88800c538980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 60.642400] ffff88800c538a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.643246] ================================================================== [ 60.644320] Disabling lock debugging due to kernel taint [ 62.734966] BUG: Bad rss-counter state mm:00000000814bd88e type:MM_FILEPAGES val:33 [ 62.736291] BUG: Bad rss-counter state mm:00000000814bd88e type:MM_ANONPAGES val:22 [ 63.160683] BUG: Bad rss-counter state mm:000000004eb331b3 type:MM_FILEPAGES val:33 [ 63.161276] BUG: Bad rss-counter state mm:000000004eb331b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46315' (ECDSA) to the list of known hosts. 2023/06/19 23:03:27 fuzzer started 2023/06/19 23:03:28 dialing manager at localhost:44161 2023/06/19 23:03:28 checking machine... 2023/06/19 23:03:28 checking revisions... [ 63.790056] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:03:28 testing simple program... [ 63.839630] cgroup: Unknown subsys name 'net' [ 63.879670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:27 Registers: info registers vcpu 0 RAX=ffffffff83865ae0 RBX=1ffff110018d3fbd RCX=0000000000000000 RDX=1ffffffff09aca7b RSI=ffffffff8363fe50 RDI=ffffffff84d653d8 RBP=ffff88801668dc00 RSP=ffff88800c69fde8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff84d653a0 R13=00007ffe43cd4f78 R14=00007ffe43cd4f74 R15=ffff88800c69fe28 RIP=ffffffff8363fe94 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 00007f2be5a3d900 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=00007f2be5ff4618 CR3=00000000168b6000 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=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 info registers vcpu 1 RAX=0000000080010001 RBX=ffff88806cf349c8 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff815987ac RDI=ffff88806cf349c8 RBP=0000000000000046 RSP=ffff88806cf09db8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000010000 R11=ffff88806cf09ff8 R12=0000000000000000 R13=ffff88806cf2c240 R14=ffff888008e27dc8 R15=dffffc0000000000 RIP=ffffffff815987ae 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=00005578d96d6000 CR3=000000000e1ea000 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=2037323a33303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000