syzkaller login: [ 37.533384] BUG: Bad rss-counter state mm:0000000074fbe3a5 type:MM_FILEPAGES val:33 [ 37.534997] BUG: Bad rss-counter state mm:0000000074fbe3a5 type:MM_ANONPAGES val:22 [ 37.606607] ================================================================== [ 37.607599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.608616] Read of size 8 at addr ffff88800f192140 by task sshd/220 [ 37.609539] [ 37.609776] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.610733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.611800] Call Trace: [ 37.612141] [ 37.612456] dump_stack_lvl+0x91/0xf0 [ 37.612984] print_report+0xcc/0x620 [ 37.613514] ? __virt_addr_valid+0x102/0x340 [ 37.614105] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.614801] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.615456] kasan_report+0xbe/0xf0 [ 37.615965] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.616636] vma_interval_tree_remove+0xc75/0xec0 [ 37.617282] vma_prepare+0xc54/0x11a0 [ 37.617795] __split_vma+0x5af/0x950 [ 37.618305] ? __pfx___split_vma+0x10/0x10 [ 37.618885] ? find_held_lock+0x2c/0x110 [ 37.619445] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.620057] ? lock_is_held_type+0x9f/0x120 [ 37.620635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.621307] ? mtree_range_walk+0x632/0x900 [ 37.621898] ? mas_walk+0x5c7/0x7c0 [ 37.622429] do_vmi_munmap+0x1f1/0x2b0 [ 37.622978] mmap_region+0x1f9/0x2660 [ 37.623500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.624051] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.624825] ? __pfx_lock_acquire+0x10/0x10 [ 37.625403] ? __pfx_mmap_region+0x10/0x10 [ 37.625971] ? security_mmap_addr+0x7d/0xa0 [ 37.626561] ? get_unmapped_area+0x1f5/0x3f0 [ 37.627148] do_mmap+0x854/0xf00 [ 37.627629] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.628168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.628783] ksys_mmap_pgoff+0x3af/0x500 [ 37.629325] do_syscall_64+0x3f/0x90 [ 37.629839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.630585] RIP: 0033:0x7fedb1176d82 [ 37.631084] 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 [ 37.633404] RSP: 002b:00007ffc74a1eb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.634409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedb1176d82 [ 37.635329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedb05b0000 [ 37.636244] RBP: 00007fedb05b0000 R08: 0000000000000009 R09: 0000000000001000 [ 37.637168] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6767d7d90 [ 37.638090] R13: 00007ffc74a1eb60 R14: 00007ffc74a1eb90 R15: 00007ffc74a1eef0 [ 37.639027] [ 37.639345] [ 37.639579] Allocated by task 213: [ 37.640053] kasan_save_stack+0x22/0x50 [ 37.640603] kasan_set_track+0x25/0x30 [ 37.641139] __kasan_slab_alloc+0x59/0x70 [ 37.641702] kmem_cache_alloc+0x16b/0x370 [ 37.642265] vm_area_dup+0x20/0x160 [ 37.642769] __split_vma+0x170/0x950 [ 37.643275] split_vma+0xc6/0x110 [ 37.643752] mprotect_fixup+0x8d2/0xb30 [ 37.644299] do_mprotect_pkey+0x87e/0xd40 [ 37.644868] __x64_sys_mprotect+0x78/0xc0 [ 37.645433] do_syscall_64+0x3f/0x90 [ 37.645950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.646665] [ 37.646901] Freed by task 13: [ 37.647321] kasan_save_stack+0x22/0x50 [ 37.647866] kasan_set_track+0x25/0x30 [ 37.648403] kasan_save_free_info+0x2b/0x50 [ 37.648980] __kasan_slab_free+0x10a/0x190 [ 37.649558] kmem_cache_free+0x10d/0x4d0 [ 37.650112] rcu_core+0x8c8/0x2860 [ 37.650611] __do_softirq+0x1b7/0x7d4 [ 37.651129] [ 37.651365] Last potentially related work creation: [ 37.652002] kasan_save_stack+0x22/0x50 [ 37.652549] __kasan_record_aux_stack+0x8e/0xa0 [ 37.653188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.653885] remove_vma+0x139/0x170 [ 37.654391] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.654995] do_vmi_munmap+0x1f1/0x2b0 [ 37.655522] __vm_munmap+0x138/0x3a0 [ 37.656028] __x64_sys_munmap+0x59/0x80 [ 37.656568] do_syscall_64+0x3f/0x90 [ 37.657082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.657776] [ 37.658008] The buggy address belongs to the object at ffff88800f1920e8 [ 37.658008] which belongs to the cache vm_area_struct of size 168 [ 37.659607] The buggy address is located 88 bytes inside of [ 37.659607] freed 168-byte region [ffff88800f1920e8, ffff88800f192190) [ 37.661123] [ 37.661358] The buggy address belongs to the physical page: [ 37.662071] page:000000006d14c641 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf192 [ 37.663264] memcg:ffff88800e0a2801 [ 37.663733] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.664435] page_type: 0xffffffff() [ 37.664925] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.665920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a2801 [ 37.666894] page dumped because: kasan: bad access detected [ 37.667609] [ 37.667845] Memory state around the buggy address: [ 37.668479] ffff88800f192000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.669407] ffff88800f192080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 37.670334] >ffff88800f192100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.671271] ^ [ 37.671963] ffff88800f192180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.672894] ffff88800f192200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.673817] ================================================================== [ 37.674940] Disabling lock debugging due to kernel taint [ 39.617325] BUG: Bad rss-counter state mm:00000000d03471d1 type:MM_FILEPAGES val:33 [ 39.618524] BUG: Bad rss-counter state mm:00000000d03471d1 type:MM_ANONPAGES val:22 [ 40.149114] BUG: Bad rss-counter state mm:00000000ed7a4bb8 type:MM_FILEPAGES val:33 [ 40.150325] BUG: Bad rss-counter state mm:00000000ed7a4bb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28687' (ECDSA) to the list of known hosts. 2023/06/20 03:19:32 fuzzer started 2023/06/20 03:19:32 dialing manager at localhost:44161 2023/06/20 03:19:32 checking machine... 2023/06/20 03:19:32 checking revisions... [ 40.797514] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:19:32 testing simple program... [ 40.850884] cgroup: Unknown subsys name 'net' [ 40.892991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:19:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000d7a063a5 RCX=ffffffff849f3800 RDX=ffff8880159b8000 RSI=0000000000000003 RDI=0000000000000000 RBP=00000000ae6cf224 RSP=ffff888014637550 R8 =0000000000000000 R9 =00000000e84bbf59 R10=00000000a1ad649c R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=0000000000000002 R15=ffff888018076b14 RIP=ffffffff8219deff 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 00007f7767fff700 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=00007f0571d4d510 CR3=000000000e914000 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=2032333a39313a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff83634611 RDX=0000000000026346 RSI=0000000000026346 RDI=ffffffff865808d8 RBP=ffff8880158f7930 RSP=ffff8880158f7868 R8 =0000000000000000 R9 =ffff8880158f7918 R10=0000000000038001 R11=000000000008a6b5 R12=ffff8880158f7938 R13=ffff8880158f7920 R14=ffff8880158f7919 R15=ffff8880158f78d8 RIP=ffffffff811307c2 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 00007f8ef2214900 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=00007ffd29d6c000 CR3=000000001cd8c000 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