syzkaller login: [ 30.444879] BUG: Bad rss-counter state mm:000000001bd78db4 type:MM_FILEPAGES val:33 [ 30.446389] BUG: Bad rss-counter state mm:000000001bd78db4 type:MM_ANONPAGES val:22 [ 30.572707] ================================================================== [ 30.573389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.573996] Read of size 8 at addr ffff8880102723f8 by task sshd/219 [ 30.574472] [ 30.574613] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.575161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.576162] Call Trace: [ 30.576374] [ 30.576561] dump_stack_lvl+0x91/0xf0 [ 30.576882] print_report+0xcc/0x620 [ 30.577192] ? __virt_addr_valid+0x102/0x340 [ 30.577555] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.577987] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.578404] kasan_report+0xbe/0xf0 [ 30.578714] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.579103] vma_interval_tree_remove+0xc75/0xec0 [ 30.579571] vma_prepare+0xc54/0x11a0 [ 30.579902] __split_vma+0x5af/0x950 [ 30.580197] ? __pfx___split_vma+0x10/0x10 [ 30.580537] ? find_held_lock+0x2c/0x110 [ 30.580899] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.581284] ? lock_is_held_type+0x9f/0x120 [ 30.581647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.582046] ? mtree_range_walk+0x632/0x900 [ 30.582423] ? mas_walk+0x5c7/0x7c0 [ 30.582770] do_vmi_munmap+0x1f1/0x2b0 [ 30.583116] mmap_region+0x1f9/0x2660 [ 30.583483] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.583852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.584370] ? __pfx_lock_acquire+0x10/0x10 [ 30.584745] ? __pfx_mmap_region+0x10/0x10 [ 30.585112] ? security_mmap_addr+0x7d/0xa0 [ 30.585489] ? get_unmapped_area+0x1f5/0x3f0 [ 30.585878] do_mmap+0x854/0xf00 [ 30.586186] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.586534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.586918] ksys_mmap_pgoff+0x3af/0x500 [ 30.587322] do_syscall_64+0x3f/0x90 [ 30.587699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.588174] RIP: 0033:0x7feca1359d82 [ 30.588498] 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 [ 30.589984] RSP: 002b:00007ffda8426888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.590654] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feca1359d82 [ 30.591245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feca0793000 [ 30.591914] RBP: 00007feca0793000 R08: 0000000000000009 R09: 0000000000001000 [ 30.592493] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb7d412b20 [ 30.593078] R13: 00007ffda84268a0 R14: 00007ffda84268d0 R15: 00007ffda8426c30 [ 30.593701] [ 30.593901] [ 30.594050] Allocated by task 212: [ 30.594342] kasan_save_stack+0x22/0x50 [ 30.594711] kasan_set_track+0x25/0x30 [ 30.595054] __kasan_slab_alloc+0x59/0x70 [ 30.595481] kmem_cache_alloc+0x16b/0x370 [ 30.595845] vm_area_dup+0x20/0x160 [ 30.596162] __split_vma+0x170/0x950 [ 30.596486] split_vma+0xc6/0x110 [ 30.596786] mprotect_fixup+0x8d2/0xb30 [ 30.597131] do_mprotect_pkey+0x87e/0xd40 [ 30.597523] __x64_sys_mprotect+0x78/0xc0 [ 30.597898] do_syscall_64+0x3f/0x90 [ 30.598235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.598722] [ 30.598874] Freed by task 219: [ 30.599147] kasan_save_stack+0x22/0x50 [ 30.599613] kasan_set_track+0x25/0x30 [ 30.599956] kasan_save_free_info+0x2b/0x50 [ 30.600320] __kasan_slab_free+0x10a/0x190 [ 30.600692] kmem_cache_free+0x10d/0x4d0 [ 30.601113] rcu_core+0x8c8/0x2860 [ 30.601425] __do_softirq+0x1b7/0x7d4 [ 30.601799] [ 30.601954] Last potentially related work creation: [ 30.602369] kasan_save_stack+0x22/0x50 [ 30.602729] __kasan_record_aux_stack+0x8e/0xa0 [ 30.603146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.603681] remove_vma+0x139/0x170 [ 30.604014] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.604411] do_vmi_munmap+0x1f1/0x2b0 [ 30.604755] __vm_munmap+0x138/0x3a0 [ 30.605089] __x64_sys_munmap+0x59/0x80 [ 30.605444] do_syscall_64+0x3f/0x90 [ 30.605807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606273] [ 30.606424] The buggy address belongs to the object at ffff8880102723a0 [ 30.606424] which belongs to the cache vm_area_struct of size 168 [ 30.607538] The buggy address is located 88 bytes inside of [ 30.607538] freed 168-byte region [ffff8880102723a0, ffff888010272448) [ 30.608531] [ 30.608683] The buggy address belongs to the physical page: [ 30.609156] page:000000005da3b1f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10272 [ 30.609958] memcg:ffff88801b861e01 [ 30.610260] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.610723] page_type: 0xffffffff() [ 30.611050] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.611762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b861e01 [ 30.612407] page dumped because: kasan: bad access detected [ 30.612879] [ 30.613030] Memory state around the buggy address: [ 30.613443] ffff888010272280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.614089] ffff888010272300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.614729] >ffff888010272380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.615367] ^ [ 30.615961] ffff888010272400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.616569] ffff888010272480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.617290] ================================================================== [ 30.618008] Disabling lock debugging due to kernel taint [ 31.977810] BUG: Bad rss-counter state mm:00000000d7b22d87 type:MM_FILEPAGES val:33 [ 31.978797] BUG: Bad rss-counter state mm:00000000d7b22d87 type:MM_ANONPAGES val:22 [ 32.351937] BUG: Bad rss-counter state mm:00000000ce00f1e9 type:MM_FILEPAGES val:33 [ 32.352614] BUG: Bad rss-counter state mm:00000000ce00f1e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34828' (ECDSA) to the list of known hosts. 2023/06/21 09:30:33 fuzzer started 2023/06/21 09:30:33 dialing manager at localhost:36067 2023/06/21 09:30:33 checking machine... 2023/06/21 09:30:33 checking revisions... [ 32.927665] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:30:33 testing simple program... [ 32.962865] cgroup: Unknown subsys name 'net' [ 33.003211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:30:33 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88801ca4d4c0 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801ca4d4c0 RBP=ffff88801ca4d4c8 RSP=ffff888018f3f7f0 R8 =0000000000000000 R9 =ffffed1003949a98 R10=ffff88801ca4d4c3 R11=0000000000000000 R12=ffff88801ca4d4d0 R13=ffff88801ca4d500 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff812e0562 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 00007ff4dbfff700 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=00007ffd0fcf1e58 CR3=0000000016202000 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=2033333a30333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30333a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8162f822 RDX=ffff888018f43680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffea00006cd480 RSP=ffff88800cfa7b40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=4920230a2e445342 R12=ffffea00006cd4b4 R13=ffff88800cfa7c00 R14=0000000000000002 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000202 [-------] 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 00007f9944daa900 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=00007fff3e314000 CR3=000000000e2ae000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000