syzkaller login: [ 43.571646] BUG: Bad rss-counter state mm:00000000f881d7f5 type:MM_FILEPAGES val:33 [ 43.572898] BUG: Bad rss-counter state mm:00000000f881d7f5 type:MM_ANONPAGES val:22 [ 43.612596] ================================================================== [ 43.613924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.615223] Read of size 8 at addr ffff88800ef0b6b0 by task sshd/220 [ 43.616258] [ 43.616641] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.617656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.618878] Call Trace: [ 43.619226] [ 43.619537] dump_stack_lvl+0x91/0xf0 [ 43.620131] print_report+0xcc/0x620 [ 43.620774] ? __virt_addr_valid+0x102/0x340 [ 43.621398] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.622103] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.622763] kasan_report+0xbe/0xf0 [ 43.623372] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.624104] vma_interval_tree_remove+0xc75/0xec0 [ 43.624778] vma_prepare+0xc54/0x11a0 [ 43.625295] __split_vma+0x5af/0x950 [ 43.625795] ? __pfx___split_vma+0x10/0x10 [ 43.626360] ? find_held_lock+0x2c/0x110 [ 43.626925] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.627525] ? lock_is_held_type+0x9f/0x120 [ 43.628097] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.628759] ? mtree_range_walk+0x632/0x900 [ 43.629348] ? mas_walk+0x5c7/0x7c0 [ 43.629863] do_vmi_munmap+0x1f1/0x2b0 [ 43.630390] mmap_region+0x1f9/0x2660 [ 43.630910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.631453] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.632227] ? __pfx_lock_acquire+0x10/0x10 [ 43.632809] ? __pfx_mmap_region+0x10/0x10 [ 43.633370] ? security_mmap_addr+0x7d/0xa0 [ 43.633939] ? get_unmapped_area+0x1f5/0x3f0 [ 43.634519] do_mmap+0x854/0xf00 [ 43.634997] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.635522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.636125] ksys_mmap_pgoff+0x3af/0x500 [ 43.636681] do_syscall_64+0x3f/0x90 [ 43.637196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.637895] RIP: 0033:0x7fb94418cd82 [ 43.638384] 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 [ 43.640660] RSP: 002b:00007ffc7aa79d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.641626] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb94418cd82 [ 43.642532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9435c6000 [ 43.643427] RBP: 00007fb9435c6000 R08: 0000000000000009 R09: 0000000000001000 [ 43.644354] R10: 0000000000000812 R11: 0000000000000206 R12: 000056324a6edf70 [ 43.645251] R13: 00007ffc7aa79d70 R14: 00007ffc7aa79da0 R15: 00007ffc7aa7a100 [ 43.646165] [ 43.646475] [ 43.646703] Allocated by task 213: [ 43.647166] kasan_save_stack+0x22/0x50 [ 43.647783] kasan_set_track+0x25/0x30 [ 43.648326] __kasan_slab_alloc+0x59/0x70 [ 43.648889] kmem_cache_alloc+0x16b/0x370 [ 43.649442] vm_area_dup+0x20/0x160 [ 43.649928] __split_vma+0x170/0x950 [ 43.650427] split_vma+0xc6/0x110 [ 43.650902] mprotect_fixup+0x8d2/0xb30 [ 43.651437] do_mprotect_pkey+0x87e/0xd40 [ 43.651998] __x64_sys_mprotect+0x78/0xc0 [ 43.652558] do_syscall_64+0x3f/0x90 [ 43.653064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.653744] [ 43.653978] Freed by task 213: [ 43.654395] kasan_save_stack+0x22/0x50 [ 43.654944] kasan_set_track+0x25/0x30 [ 43.655473] kasan_save_free_info+0x2b/0x50 [ 43.656043] __kasan_slab_free+0x10a/0x190 [ 43.656627] kmem_cache_free+0x10d/0x4d0 [ 43.657177] rcu_core+0x8c8/0x2860 [ 43.657653] __do_softirq+0x1b7/0x7d4 [ 43.658168] [ 43.658410] Last potentially related work creation: [ 43.659055] kasan_save_stack+0x22/0x50 [ 43.659596] __kasan_record_aux_stack+0x8e/0xa0 [ 43.660218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.660916] remove_vma+0x139/0x170 [ 43.661404] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.662009] do_vmi_munmap+0x1f1/0x2b0 [ 43.662526] __vm_munmap+0x138/0x3a0 [ 43.663029] __x64_sys_munmap+0x59/0x80 [ 43.663557] do_syscall_64+0x3f/0x90 [ 43.664075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.664771] [ 43.665004] Second to last potentially related work creation: [ 43.665729] kasan_save_stack+0x22/0x50 [ 43.666268] __kasan_record_aux_stack+0x8e/0xa0 [ 43.666885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.667564] remove_vma+0x139/0x170 [ 43.668058] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.668660] do_vmi_munmap+0x1f1/0x2b0 [ 43.669190] mmap_region+0x1f9/0x2660 [ 43.669695] do_mmap+0x854/0xf00 [ 43.670155] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.670675] ksys_mmap_pgoff+0x3af/0x500 [ 43.671220] do_syscall_64+0x3f/0x90 [ 43.671717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.672413] [ 43.672639] The buggy address belongs to the object at ffff88800ef0b658 [ 43.672639] which belongs to the cache vm_area_struct of size 168 [ 43.674349] The buggy address is located 88 bytes inside of [ 43.674349] freed 168-byte region [ffff88800ef0b658, ffff88800ef0b700) [ 43.675955] [ 43.676193] The buggy address belongs to the physical page: [ 43.676915] page:00000000faa63ef6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef0b [ 43.678074] memcg:ffff88800edc9401 [ 43.678525] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.679208] page_type: 0xffffffff() [ 43.679690] raw: 0100000000000200 ffff88800879fc80 ffffea0000385080 dead000000000008 [ 43.680684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edc9401 [ 43.681657] page dumped because: kasan: bad access detected [ 43.682365] [ 43.682595] Memory state around the buggy address: [ 43.683220] ffff88800ef0b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.684140] ffff88800ef0b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.685072] >ffff88800ef0b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.685989] ^ [ 43.686613] ffff88800ef0b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 43.687526] ffff88800ef0b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.688445] ================================================================== [ 43.689500] Disabling lock debugging due to kernel taint [ 46.471935] BUG: Bad rss-counter state mm:0000000011ff8ab9 type:MM_FILEPAGES val:33 [ 46.473116] BUG: Bad rss-counter state mm:0000000011ff8ab9 type:MM_ANONPAGES val:22 [ 46.851151] BUG: Bad rss-counter state mm:0000000026a8439e type:MM_FILEPAGES val:33 [ 46.852145] BUG: Bad rss-counter state mm:0000000026a8439e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12498' (ECDSA) to the list of known hosts. 2023/06/20 04:16:00 fuzzer started 2023/06/20 04:16:00 dialing manager at localhost:44161 2023/06/20 04:16:00 checking machine... 2023/06/20 04:16:00 checking revisions... [ 47.574206] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:16:00 testing simple program... [ 47.629345] cgroup: Unknown subsys name 'net' [ 47.671972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8386d62b RDI=ffff888015b8ba74 RBP=1ffff11002d94efb RSP=ffff888016ca77d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801a00d000 R13=ffff88801a00d080 R14=ffffffff87f94640 R15=ffff888016ca77f8 RIP=ffffffff8137457b RFL=00000293 [--S-A-C] 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 00007fb58415d900 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=00007ffd3eaa9000 CR3=000000001c6aa000 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=ffff888008c58400 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=00007f79edfe5090 CR3=000000000beb6000 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=2039353a35313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000