syzkaller login: [ 30.485008] BUG: Bad rss-counter state mm:000000006bbf0603 type:MM_FILEPAGES val:33 [ 30.486150] BUG: Bad rss-counter state mm:000000006bbf0603 type:MM_ANONPAGES val:22 [ 30.646785] ================================================================== [ 30.647878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.649026] Read of size 8 at addr ffff888018a41880 by task sshd/219 [ 30.649931] [ 30.650158] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.651031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.652007] Call Trace: [ 30.652337] [ 30.652634] dump_stack_lvl+0x91/0xf0 [ 30.653140] print_report+0xcc/0x620 [ 30.653648] ? __virt_addr_valid+0x102/0x340 [ 30.654209] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.654844] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655474] kasan_report+0xbe/0xf0 [ 30.655949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656593] vma_interval_tree_remove+0xc75/0xec0 [ 30.657224] vma_prepare+0xc54/0x11a0 [ 30.657729] __split_vma+0x5af/0x950 [ 30.658222] ? __pfx___split_vma+0x10/0x10 [ 30.658770] ? find_held_lock+0x2c/0x110 [ 30.659314] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.659900] ? lock_is_held_type+0x9f/0x120 [ 30.660463] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.661126] ? mtree_range_walk+0x632/0x900 [ 30.661699] ? mas_walk+0x5c7/0x7c0 [ 30.662195] do_vmi_munmap+0x1f1/0x2b0 [ 30.662709] mmap_region+0x1f9/0x2660 [ 30.663213] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.663751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.664512] ? __pfx_lock_acquire+0x10/0x10 [ 30.665078] ? __pfx_mmap_region+0x10/0x10 [ 30.665634] ? security_mmap_addr+0x7d/0xa0 [ 30.666198] ? get_unmapped_area+0x1f5/0x3f0 [ 30.666772] do_mmap+0x854/0xf00 [ 30.667230] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.667752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.668362] ksys_mmap_pgoff+0x3af/0x500 [ 30.668908] do_syscall_64+0x3f/0x90 [ 30.669389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.670074] RIP: 0033:0x7f092c7f3d82 [ 30.670556] 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 [ 30.672831] RSP: 002b:00007ffff98db3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.673784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f092c7f3d82 [ 30.674679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f092bc2d000 [ 30.675569] RBP: 00007f092bc2d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.676465] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b72bdbec0 [ 30.677366] R13: 00007ffff98db400 R14: 00007ffff98db430 R15: 00007ffff98db790 [ 30.678272] [ 30.678582] [ 30.678804] Allocated by task 212: [ 30.679252] kasan_save_stack+0x22/0x50 [ 30.679780] kasan_set_track+0x25/0x30 [ 30.680293] __kasan_slab_alloc+0x59/0x70 [ 30.680843] kmem_cache_alloc+0x16b/0x370 [ 30.681383] vm_area_dup+0x20/0x160 [ 30.681865] __split_vma+0x170/0x950 [ 30.682354] split_vma+0xc6/0x110 [ 30.682813] mprotect_fixup+0x8d2/0xb30 [ 30.683341] do_mprotect_pkey+0x87e/0xd40 [ 30.683886] __x64_sys_mprotect+0x78/0xc0 [ 30.684437] do_syscall_64+0x3f/0x90 [ 30.684958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685633] [ 30.685862] Freed by task 212: [ 30.686273] kasan_save_stack+0x22/0x50 [ 30.686795] kasan_set_track+0x25/0x30 [ 30.687319] kasan_save_free_info+0x2b/0x50 [ 30.687880] __kasan_slab_free+0x10a/0x190 [ 30.688444] kmem_cache_free+0x10d/0x4d0 [ 30.688985] rcu_core+0x8c8/0x2860 [ 30.689452] __do_softirq+0x1b7/0x7d4 [ 30.689951] [ 30.690181] Last potentially related work creation: [ 30.690797] kasan_save_stack+0x22/0x50 [ 30.691330] __kasan_record_aux_stack+0x8e/0xa0 [ 30.691930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692618] remove_vma+0x139/0x170 [ 30.693094] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693676] do_vmi_munmap+0x1f1/0x2b0 [ 30.694185] __vm_munmap+0x138/0x3a0 [ 30.694680] __x64_sys_munmap+0x59/0x80 [ 30.695203] do_syscall_64+0x3f/0x90 [ 30.695698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696367] [ 30.696773] The buggy address belongs to the object at ffff888018a41828 [ 30.696773] which belongs to the cache vm_area_struct of size 168 [ 30.698659] The buggy address is located 88 bytes inside of [ 30.698659] freed 168-byte region [ffff888018a41828, ffff888018a418d0) [ 30.700438] [ 30.700737] The buggy address belongs to the physical page: [ 30.701580] page:0000000095c5c749 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18a41 [ 30.702976] memcg:ffff88800febc601 [ 30.703510] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.704341] page_type: 0xffffffff() [ 30.704910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.706095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800febc601 [ 30.707248] page dumped because: kasan: bad access detected [ 30.708092] [ 30.708360] Memory state around the buggy address: [ 30.709103] ffff888018a41780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.710191] ffff888018a41800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.711276] >ffff888018a41880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.712389] ^ [ 30.712934] ffff888018a41900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.713902] ffff888018a41980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.714784] ================================================================== [ 30.715863] Disabling lock debugging due to kernel taint [ 32.772457] BUG: Bad rss-counter state mm:000000009e8122e7 type:MM_FILEPAGES val:33 [ 32.772983] BUG: Bad rss-counter state mm:000000009e8122e7 type:MM_ANONPAGES val:22 [ 33.152754] BUG: Bad rss-counter state mm:000000008fabdcfc type:MM_FILEPAGES val:33 [ 33.153828] BUG: Bad rss-counter state mm:000000008fabdcfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36669' (ECDSA) to the list of known hosts. 2023/06/21 03:25:23 fuzzer started 2023/06/21 03:25:23 dialing manager at localhost:36067 2023/06/21 03:25:23 checking machine... 2023/06/21 03:25:23 checking revisions... [ 33.681387] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:25:23 testing simple program... [ 33.718877] cgroup: Unknown subsys name 'net' [ 33.757088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:25:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff88801881f738 RDX=1ffff11003103ed3 RSI=ffffffff813ad720 RDI=ffff88801881f698 RBP=ffff88801881f730 RSP=ffff88801881f670 R8 =0000000000000001 R9 =ffff88801881f6d8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801881f760 R13=0000000000000000 R14=ffff88800d99b680 R15=ffff88801881f698 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f83dde7a900 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=00007ffe95d80000 CR3=000000001c92a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fd909558020 CR3=000000000c6f8000 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=f8946ab2147ff8a22d48b50e16d48483 XMM02=2c67c8bc2e329bc3000000000011a8e8 XMM03=fb795ef6d65770560000000000121d50 XMM04=3738d23cf11c629300000000000ae988 XMM05=dfcdbad4f1609c370000000000131b08 XMM06=b18d5135fde92ced0000000000130970 XMM07=e042d86d42eb936e0000000000121fd0 XMM08=e009964504808b7f000000000011a948 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000