syzkaller login: [ 32.505087] BUG: Bad rss-counter state mm:000000008fded65a type:MM_FILEPAGES val:33 [ 32.506354] BUG: Bad rss-counter state mm:000000008fded65a type:MM_ANONPAGES val:22 [ 32.544492] ================================================================== [ 32.545758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.547074] Read of size 8 at addr ffff88801a071968 by task sshd/220 [ 32.548022] [ 32.548290] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.549396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.550600] Call Trace: [ 32.550998] [ 32.551344] dump_stack_lvl+0x91/0xf0 [ 32.551949] print_report+0xcc/0x620 [ 32.552534] ? __virt_addr_valid+0x102/0x340 [ 32.553222] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.553982] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.554747] kasan_report+0xbe/0xf0 [ 32.555316] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.556067] vma_interval_tree_remove+0xc75/0xec0 [ 32.556810] vma_prepare+0xc54/0x11a0 [ 32.557398] __split_vma+0x5af/0x950 [ 32.557966] ? __pfx___split_vma+0x10/0x10 [ 32.558614] ? find_held_lock+0x2c/0x110 [ 32.559229] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.559928] ? lock_is_held_type+0x9f/0x120 [ 32.560591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.561352] ? mtree_range_walk+0x632/0x900 [ 32.562028] ? mas_walk+0x5c7/0x7c0 [ 32.562597] do_vmi_munmap+0x1f1/0x2b0 [ 32.563201] mmap_region+0x1f9/0x2660 [ 32.563794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.564421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.565307] ? __pfx_lock_acquire+0x10/0x10 [ 32.565965] ? __pfx_mmap_region+0x10/0x10 [ 32.566601] ? security_mmap_addr+0x7d/0xa0 [ 32.567248] ? get_unmapped_area+0x1f5/0x3f0 [ 32.567908] do_mmap+0x854/0xf00 [ 32.568438] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.569042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.569740] ksys_mmap_pgoff+0x3af/0x500 [ 32.570361] do_syscall_64+0x3f/0x90 [ 32.570936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.571712] RIP: 0033:0x7f18447cfd82 [ 32.572267] 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 [ 32.574921] RSP: 002b:00007fff74f8e6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.576040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18447cfd82 [ 32.577081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1843c09000 [ 32.578142] RBP: 00007f1843c09000 R08: 0000000000000009 R09: 0000000000001000 [ 32.579182] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576f0f64ec0 [ 32.580218] R13: 00007fff74f8e6e0 R14: 00007fff74f8e710 R15: 00007fff74f8ea70 [ 32.581265] [ 32.581651] [ 32.581914] Allocated by task 211: [ 32.582437] kasan_save_stack+0x22/0x50 [ 32.583040] kasan_set_track+0x25/0x30 [ 32.583636] __kasan_slab_alloc+0x59/0x70 [ 32.584260] kmem_cache_alloc+0x16b/0x370 [ 32.584901] vm_area_dup+0x20/0x160 [ 32.585439] __split_vma+0x170/0x950 [ 32.585926] split_vma+0xc6/0x110 [ 32.586359] mprotect_fixup+0x8d2/0xb30 [ 32.586907] do_mprotect_pkey+0x87e/0xd40 [ 32.587461] __x64_sys_mprotect+0x78/0xc0 [ 32.587959] do_syscall_64+0x3f/0x90 [ 32.588492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.589101] [ 32.589327] Freed by task 211: [ 32.589702] kasan_save_stack+0x22/0x50 [ 32.590177] kasan_set_track+0x25/0x30 [ 32.590645] kasan_save_free_info+0x2b/0x50 [ 32.591151] __kasan_slab_free+0x10a/0x190 [ 32.591658] kmem_cache_free+0x10d/0x4d0 [ 32.592139] rcu_core+0x8c8/0x2860 [ 32.592561] __do_softirq+0x1b7/0x7d4 [ 32.593012] [ 32.593218] Last potentially related work creation: [ 32.593785] kasan_save_stack+0x22/0x50 [ 32.594269] __kasan_record_aux_stack+0x8e/0xa0 [ 32.594823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.595471] remove_vma+0x139/0x170 [ 32.595926] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.596474] do_vmi_munmap+0x1f1/0x2b0 [ 32.596959] __vm_munmap+0x138/0x3a0 [ 32.597436] __x64_sys_munmap+0x59/0x80 [ 32.597936] do_syscall_64+0x3f/0x90 [ 32.598410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.599040] [ 32.599256] The buggy address belongs to the object at ffff88801a071910 [ 32.599256] which belongs to the cache vm_area_struct of size 168 [ 32.600747] The buggy address is located 88 bytes inside of [ 32.600747] freed 168-byte region [ffff88801a071910, ffff88801a0719b8) [ 32.602157] [ 32.602376] The buggy address belongs to the physical page: [ 32.603038] page:00000000e3bf82eb refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801a071e80 pfn:0x1a071 [ 32.604272] memcg:ffff88800dd0c201 [ 32.604705] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.605358] page_type: 0xffffffff() [ 32.605808] raw: 0100000000000200 ffff88800879fc80 ffffea00003a5340 dead000000000002 [ 32.606753] raw: ffff88801a071e80 000000008011000c 00000001ffffffff ffff88800dd0c201 [ 32.607653] page dumped because: kasan: bad access detected [ 32.608301] [ 32.608519] Memory state around the buggy address: [ 32.609103] ffff88801a071800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.609979] ffff88801a071880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.610833] >ffff88801a071900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.611675] ^ [ 32.612459] ffff88801a071980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.613312] ffff88801a071a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.614164] ================================================================== [ 32.615088] Disabling lock debugging due to kernel taint [ 35.292811] BUG: Bad rss-counter state mm:000000008d133c4d type:MM_FILEPAGES val:33 [ 35.293864] BUG: Bad rss-counter state mm:000000008d133c4d type:MM_ANONPAGES val:22 [ 35.813773] BUG: Bad rss-counter state mm:000000000c56223c type:MM_FILEPAGES val:33 [ 35.814779] BUG: Bad rss-counter state mm:000000000c56223c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52494' (ECDSA) to the list of known hosts. 2023/06/20 07:42:19 fuzzer started 2023/06/20 07:42:19 dialing manager at localhost:44161 2023/06/20 07:42:19 checking machine... 2023/06/20 07:42:19 checking revisions... [ 36.435415] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:42:19 testing simple program... [ 36.484935] cgroup: Unknown subsys name 'net' [ 36.535763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8153447a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88801908f828 RSP=ffff88806ce09fe8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806ce09ff8 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8118dc4d RFL=00000002 [-------] 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 00007f2bca04d900 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=00007fff729da000 CR3=000000000da82000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd746820b30 CR3=000000000f596000 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=07b27fa7607b11954643fd62b61e585d XMM02=2c67c8bc2e329bc3000000000011fba8 XMM03=fb795ef6d65770560000000000123b20 XMM04=9167ae2d9295e63000000000000ae988 XMM05=9942f7c6c21f45920000000000134bd8 XMM06=4fda316b135da52b0000000000133c78 XMM07=e042d86d42eb936e0000000000123df8 XMM08=135e6c1c1645e202000000000011fc08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000