syzkaller login: [ 30.640847] BUG: Bad rss-counter state mm:00000000e703a775 type:MM_FILEPAGES val:33 [ 30.641855] BUG: Bad rss-counter state mm:00000000e703a775 type:MM_ANONPAGES val:22 [ 30.804738] ================================================================== [ 30.805685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.806653] Read of size 8 at addr ffff88800970cd08 by task sshd/220 [ 30.807525] [ 30.807858] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.808731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.809724] Call Trace: [ 30.810188] [ 30.810542] dump_stack_lvl+0x91/0xf0 [ 30.811148] print_report+0xcc/0x620 [ 30.811731] ? __virt_addr_valid+0x102/0x340 [ 30.812387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813116] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813851] kasan_report+0xbe/0xf0 [ 30.814415] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815198] vma_interval_tree_remove+0xc75/0xec0 [ 30.815946] vma_prepare+0xc54/0x11a0 [ 30.816543] __split_vma+0x5af/0x950 [ 30.817122] ? __pfx___split_vma+0x10/0x10 [ 30.817782] ? find_held_lock+0x2c/0x110 [ 30.818429] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.819157] ? lock_is_held_type+0x9f/0x120 [ 30.819751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.820361] ? mtree_range_walk+0x632/0x900 [ 30.820911] ? mas_walk+0x5c7/0x7c0 [ 30.821394] do_vmi_munmap+0x1f1/0x2b0 [ 30.821887] mmap_region+0x1f9/0x2660 [ 30.822361] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.822897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.823755] ? __pfx_lock_acquire+0x10/0x10 [ 30.824296] ? __pfx_mmap_region+0x10/0x10 [ 30.824829] ? security_mmap_addr+0x7d/0xa0 [ 30.825362] ? get_unmapped_area+0x1f5/0x3f0 [ 30.825923] do_mmap+0x854/0xf00 [ 30.826368] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.826862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.827450] ksys_mmap_pgoff+0x3af/0x500 [ 30.827957] do_syscall_64+0x3f/0x90 [ 30.828433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829082] RIP: 0033:0x7f1e7398cd82 [ 30.829539] 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 [ 30.831672] RSP: 002b:00007ffc0793bec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.832575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e7398cd82 [ 30.833424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e72dc6000 [ 30.834275] RBP: 00007f1e72dc6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.835140] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cf911cec0 [ 30.835991] R13: 00007ffc0793bee0 R14: 00007ffc0793bf10 R15: 00007ffc0793c270 [ 30.836854] [ 30.837148] [ 30.837364] Allocated by task 213: [ 30.837795] kasan_save_stack+0x22/0x50 [ 30.838304] kasan_set_track+0x25/0x30 [ 30.838797] __kasan_slab_alloc+0x59/0x70 [ 30.839348] kmem_cache_alloc+0x16b/0x370 [ 30.839867] vm_area_dup+0x20/0x160 [ 30.840320] __split_vma+0x170/0x950 [ 30.840785] split_vma+0xc6/0x110 [ 30.841226] mprotect_fixup+0x8d2/0xb30 [ 30.841732] do_mprotect_pkey+0x87e/0xd40 [ 30.842252] __x64_sys_mprotect+0x78/0xc0 [ 30.842778] do_syscall_64+0x3f/0x90 [ 30.843255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843906] [ 30.844123] Freed by task 213: [ 30.844518] kasan_save_stack+0x22/0x50 [ 30.845019] kasan_set_track+0x25/0x30 [ 30.845511] kasan_save_free_info+0x2b/0x50 [ 30.846040] __kasan_slab_free+0x10a/0x190 [ 30.846578] kmem_cache_free+0x10d/0x4d0 [ 30.847092] rcu_core+0x8c8/0x2860 [ 30.847558] __do_softirq+0x1b7/0x7d4 [ 30.848038] [ 30.848251] Last potentially related work creation: [ 30.848839] kasan_save_stack+0x22/0x50 [ 30.849411] __kasan_record_aux_stack+0x8e/0xa0 [ 30.849987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.850626] remove_vma+0x139/0x170 [ 30.851078] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.851643] do_vmi_munmap+0x1f1/0x2b0 [ 30.852130] __vm_munmap+0x138/0x3a0 [ 30.852596] __x64_sys_munmap+0x59/0x80 [ 30.853100] do_syscall_64+0x3f/0x90 [ 30.853576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854220] [ 30.854437] The buggy address belongs to the object at ffff88800970ccb0 [ 30.854437] which belongs to the cache vm_area_struct of size 168 [ 30.855937] The buggy address is located 88 bytes inside of [ 30.855937] freed 168-byte region [ffff88800970ccb0, ffff88800970cd58) [ 30.857336] [ 30.857553] The buggy address belongs to the physical page: [ 30.858219] page:00000000ba0a3f3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x970c [ 30.859312] memcg:ffff88800cfcba01 [ 30.859735] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.860443] page_type: 0xffffffff() [ 30.860895] raw: 0100000000000200 ffff8880087a0c80 ffffea00003afd00 dead000000000003 [ 30.861830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfcba01 [ 30.862739] page dumped because: kasan: bad access detected [ 30.863438] [ 30.863653] Memory state around the buggy address: [ 30.864234] ffff88800970cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.865085] ffff88800970cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.865932] >ffff88800970cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.866781] ^ [ 30.867238] ffff88800970cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.868104] ffff88800970ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.868945] ================================================================== [ 30.869884] Disabling lock debugging due to kernel taint [ 33.518697] BUG: Bad rss-counter state mm:00000000a197f62e type:MM_FILEPAGES val:33 [ 33.519776] BUG: Bad rss-counter state mm:00000000a197f62e type:MM_ANONPAGES val:22 [ 33.969436] BUG: Bad rss-counter state mm:0000000096b70d09 type:MM_FILEPAGES val:33 [ 33.970759] BUG: Bad rss-counter state mm:0000000096b70d09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13325' (ECDSA) to the list of known hosts. 2023/06/20 21:19:03 fuzzer started 2023/06/20 21:19:03 dialing manager at localhost:36067 2023/06/20 21:19:03 checking machine... 2023/06/20 21:19:03 checking revisions... [ 34.692290] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:19:03 testing simple program... [ 34.736176] cgroup: Unknown subsys name 'net' [ 34.791332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:19:02 Registers: info registers vcpu 0 RAX=1ffff110018b9439 RBX=ffff88800c5ca198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c5ca1c8 RBP=ffff8880147fbb70 RSP=ffff888008d9fcb8 R8 =0000000000000001 R9 =ffffed10011b3f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888015d7ef18 R14=ffffffff813782f8 R15=ffff888015d7ef18 RIP=ffffffff818464ec 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 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=00007ffcc653f000 CR3=0000000019c02000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f4de3853a90 CR3=000000000eb9e000 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=2032303a39313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39313a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000