syzkaller login: [ 31.421805] BUG: Bad rss-counter state mm:00000000a5ba2d54 type:MM_FILEPAGES val:33 [ 31.423305] BUG: Bad rss-counter state mm:00000000a5ba2d54 type:MM_ANONPAGES val:22 [ 31.581534] ================================================================== [ 31.582649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.583850] Read of size 8 at addr ffff888016733968 by task sshd/222 [ 31.584877] [ 31.585105] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.585967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.586967] Call Trace: [ 31.587293] [ 31.587582] dump_stack_lvl+0x91/0xf0 [ 31.588083] print_report+0xcc/0x620 [ 31.588570] ? __virt_addr_valid+0x102/0x340 [ 31.589124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589752] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590376] kasan_report+0xbe/0xf0 [ 31.590851] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.591472] vma_interval_tree_remove+0xc75/0xec0 [ 31.592087] vma_prepare+0xc54/0x11a0 [ 31.592575] __split_vma+0x5af/0x950 [ 31.593053] ? __pfx___split_vma+0x10/0x10 [ 31.593590] ? find_held_lock+0x2c/0x110 [ 31.594115] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.594692] ? lock_is_held_type+0x9f/0x120 [ 31.595245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.595884] ? mtree_range_walk+0x632/0x900 [ 31.596447] ? mas_walk+0x5c7/0x7c0 [ 31.596937] do_vmi_munmap+0x1f1/0x2b0 [ 31.597436] mmap_region+0x1f9/0x2660 [ 31.597929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.598458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.599199] ? __pfx_lock_acquire+0x10/0x10 [ 31.599749] ? __pfx_mmap_region+0x10/0x10 [ 31.600283] ? security_mmap_addr+0x7d/0xa0 [ 31.600828] ? get_unmapped_area+0x1f5/0x3f0 [ 31.601387] do_mmap+0x854/0xf00 [ 31.601836] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.602331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.602901] ksys_mmap_pgoff+0x3af/0x500 [ 31.603417] do_syscall_64+0x3f/0x90 [ 31.603923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604577] RIP: 0033:0x7f7117884d82 [ 31.605040] 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 [ 31.607169] RSP: 002b:00007ffea474fc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.608097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7117884d82 [ 31.608955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7116cbe000 [ 31.609817] RBP: 00007f7116cbe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.610675] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633a34e5ec0 [ 31.611527] R13: 00007ffea474fca0 R14: 00007ffea474fcd0 R15: 00007ffea4750030 [ 31.612400] [ 31.612695] [ 31.612914] Allocated by task 215: [ 31.613345] kasan_save_stack+0x22/0x50 [ 31.613853] kasan_set_track+0x25/0x30 [ 31.614352] __kasan_slab_alloc+0x59/0x70 [ 31.614886] kmem_cache_alloc+0x16b/0x370 [ 31.615405] vm_area_dup+0x20/0x160 [ 31.615879] __split_vma+0x170/0x950 [ 31.616352] split_vma+0xc6/0x110 [ 31.616792] mprotect_fixup+0x8d2/0xb30 [ 31.617309] do_mprotect_pkey+0x87e/0xd40 [ 31.617839] __x64_sys_mprotect+0x78/0xc0 [ 31.618366] do_syscall_64+0x3f/0x90 [ 31.618844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.619491] [ 31.619713] Freed by task 215: [ 31.620110] kasan_save_stack+0x22/0x50 [ 31.620623] kasan_set_track+0x25/0x30 [ 31.621126] kasan_save_free_info+0x2b/0x50 [ 31.621667] __kasan_slab_free+0x10a/0x190 [ 31.622200] kmem_cache_free+0x10d/0x4d0 [ 31.622710] rcu_core+0x8c8/0x2860 [ 31.623158] __do_softirq+0x1b7/0x7d4 [ 31.623644] [ 31.623869] Last potentially related work creation: [ 31.624466] kasan_save_stack+0x22/0x50 [ 31.624972] __kasan_record_aux_stack+0x8e/0xa0 [ 31.625651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.626313] remove_vma+0x139/0x170 [ 31.626768] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.627335] do_vmi_munmap+0x1f1/0x2b0 [ 31.627846] __vm_munmap+0x138/0x3a0 [ 31.628380] __x64_sys_munmap+0x59/0x80 [ 31.628927] do_syscall_64+0x3f/0x90 [ 31.629419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630079] [ 31.630299] The buggy address belongs to the object at ffff888016733910 [ 31.630299] which belongs to the cache vm_area_struct of size 168 [ 31.631791] The buggy address is located 88 bytes inside of [ 31.631791] freed 168-byte region [ffff888016733910, ffff8880167339b8) [ 31.633231] [ 31.633447] The buggy address belongs to the physical page: [ 31.634114] page:00000000dc93f80f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16733 [ 31.635225] memcg:ffff888016731301 [ 31.635661] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.636338] page_type: 0xffffffff() [ 31.636841] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.637826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016731301 [ 31.638745] page dumped because: kasan: bad access detected [ 31.639413] [ 31.639631] Memory state around the buggy address: [ 31.640235] ffff888016733800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.641097] ffff888016733880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.641976] >ffff888016733900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.642849] ^ [ 31.643647] ffff888016733980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.644553] ffff888016733a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.645478] ================================================================== [ 31.646465] Disabling lock debugging due to kernel taint [ 33.776273] BUG: Bad rss-counter state mm:00000000bdf644f2 type:MM_FILEPAGES val:33 [ 33.777421] BUG: Bad rss-counter state mm:00000000bdf644f2 type:MM_ANONPAGES val:22 [ 34.254688] BUG: Bad rss-counter state mm:000000006ade5504 type:MM_FILEPAGES val:33 [ 34.255689] BUG: Bad rss-counter state mm:000000006ade5504 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1802' (ECDSA) to the list of known hosts. 2023/06/20 11:05:38 fuzzer started 2023/06/20 11:05:38 dialing manager at localhost:36067 2023/06/20 11:05:38 checking machine... 2023/06/20 11:05:38 checking revisions... [ 34.972500] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:05:38 testing simple program... [ 35.032361] cgroup: Unknown subsys name 'net' [ 35.072463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88800f117c90 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000283 R13=ffff888017d3c9c8 R14=ffffffff818c73ee R15=ffff88800ecf0780 RIP=ffffffff812e0488 RFL=00000012 [----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 00007f7a45079900 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=00007ffd50dd9000 CR3=000000000e9a4000 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=00007fb6af47c000 CR3=00000000102c0000 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=630a9dcea0678fbcb245332e6af1fbc7 XMM02=000000000011d500eff9b2d0a8fce9cb XMM03=000000000011d5d02c67c8bc2e329bc3 XMM04=e2acec4f60c1e78300000000000ae988 XMM05=6fb5f7f9606b33680000000000131f10 XMM06=00c3ffa147b8d8570000000000131908 XMM07=e042d86d42eb936e0000000000121eb8 XMM08=641330d5f8808100000000000011d5d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000