syzkaller login: [ 32.430631] BUG: Bad rss-counter state mm:00000000d2e5887d type:MM_FILEPAGES val:33 [ 32.432547] BUG: Bad rss-counter state mm:00000000d2e5887d type:MM_ANONPAGES val:22 [ 32.601933] ================================================================== [ 32.602828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.603774] Read of size 8 at addr ffff88801a875880 by task sshd/220 [ 32.604524] [ 32.604801] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.605726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.606688] Call Trace: [ 32.607006] [ 32.607310] dump_stack_lvl+0x91/0xf0 [ 32.607799] print_report+0xcc/0x620 [ 32.608281] ? __virt_addr_valid+0x102/0x340 [ 32.608828] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.609439] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.610050] kasan_report+0xbe/0xf0 [ 32.610523] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.611137] vma_interval_tree_remove+0xc75/0xec0 [ 32.611759] vma_prepare+0xc54/0x11a0 [ 32.612235] __split_vma+0x5af/0x950 [ 32.612703] ? __pfx___split_vma+0x10/0x10 [ 32.613226] ? find_held_lock+0x2c/0x110 [ 32.613745] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.614300] ? lock_is_held_type+0x9f/0x120 [ 32.614831] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.615443] ? mtree_range_walk+0x632/0x900 [ 32.615991] ? mas_walk+0x5c7/0x7c0 [ 32.616459] do_vmi_munmap+0x1f1/0x2b0 [ 32.616951] mmap_region+0x1f9/0x2660 [ 32.617426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.617933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.618646] ? __pfx_lock_acquire+0x10/0x10 [ 32.619170] ? __pfx_mmap_region+0x10/0x10 [ 32.619717] ? security_mmap_addr+0x7d/0xa0 [ 32.620242] ? get_unmapped_area+0x1f5/0x3f0 [ 32.620783] do_mmap+0x854/0xf00 [ 32.621221] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.621714] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.622270] ksys_mmap_pgoff+0x3af/0x500 [ 32.622773] do_syscall_64+0x3f/0x90 [ 32.623266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.623903] RIP: 0033:0x7eff5d92bd82 [ 32.624356] 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 [ 32.626473] RSP: 002b:00007ffe88356fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.627371] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff5d92bd82 [ 32.628209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff5cd65000 [ 32.629049] RBP: 00007eff5cd65000 R08: 0000000000000009 R09: 0000000000001000 [ 32.629893] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b3bb12ec0 [ 32.630737] R13: 00007ffe88356fd0 R14: 00007ffe88357000 R15: 00007ffe88357360 [ 32.631607] [ 32.631898] [ 32.632111] Allocated by task 213: [ 32.632534] kasan_save_stack+0x22/0x50 [ 32.633035] kasan_set_track+0x25/0x30 [ 32.633522] __kasan_slab_alloc+0x59/0x70 [ 32.634043] kmem_cache_alloc+0x16b/0x370 [ 32.634553] vm_area_dup+0x20/0x160 [ 32.635000] __split_vma+0x170/0x950 [ 32.635469] split_vma+0xc6/0x110 [ 32.635902] mprotect_fixup+0x8d2/0xb30 [ 32.636398] do_mprotect_pkey+0x87e/0xd40 [ 32.636914] __x64_sys_mprotect+0x78/0xc0 [ 32.637434] do_syscall_64+0x3f/0x90 [ 32.637904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.638541] [ 32.638755] Freed by task 213: [ 32.639143] kasan_save_stack+0x22/0x50 [ 32.639663] kasan_set_track+0x25/0x30 [ 32.640150] kasan_save_free_info+0x2b/0x50 [ 32.640679] __kasan_slab_free+0x10a/0x190 [ 32.641209] kmem_cache_free+0x10d/0x4d0 [ 32.641719] rcu_core+0x8c8/0x2860 [ 32.642156] __do_softirq+0x1b7/0x7d4 [ 32.642626] [ 32.642843] Last potentially related work creation: [ 32.643434] kasan_save_stack+0x22/0x50 [ 32.643935] __kasan_record_aux_stack+0x8e/0xa0 [ 32.644506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.645143] remove_vma+0x139/0x170 [ 32.645592] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.646235] do_vmi_munmap+0x1f1/0x2b0 [ 32.646724] __vm_munmap+0x138/0x3a0 [ 32.647183] __x64_sys_munmap+0x59/0x80 [ 32.647698] do_syscall_64+0x3f/0x90 [ 32.648173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.648810] [ 32.649029] The buggy address belongs to the object at ffff88801a875828 [ 32.649029] which belongs to the cache vm_area_struct of size 168 [ 32.650475] The buggy address is located 88 bytes inside of [ 32.650475] freed 168-byte region [ffff88801a875828, ffff88801a8758d0) [ 32.651863] [ 32.652079] The buggy address belongs to the physical page: [ 32.652733] page:0000000066f0fea2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a875 [ 32.653817] memcg:ffff8880166f4401 [ 32.654240] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.654886] page_type: 0xffffffff() [ 32.655340] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.656253] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166f4401 [ 32.657149] page dumped because: kasan: bad access detected [ 32.657806] [ 32.658023] Memory state around the buggy address: [ 32.658597] ffff88801a875780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.659458] ffff88801a875800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.660313] >ffff88801a875880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.661163] ^ [ 32.661569] ffff88801a875900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.662413] ffff88801a875980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.663257] ================================================================== [ 32.664170] Disabling lock debugging due to kernel taint [ 35.171196] BUG: Bad rss-counter state mm:00000000da086d91 type:MM_FILEPAGES val:33 [ 35.172261] BUG: Bad rss-counter state mm:00000000da086d91 type:MM_ANONPAGES val:22 [ 35.693554] BUG: Bad rss-counter state mm:00000000f05bf76a type:MM_FILEPAGES val:33 [ 35.694611] BUG: Bad rss-counter state mm:00000000f05bf76a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64925' (ECDSA) to the list of known hosts. 2023/06/19 16:09:00 fuzzer started 2023/06/19 16:09:00 dialing manager at localhost:44161 2023/06/19 16:09:00 checking machine... 2023/06/19 16:09:00 checking revisions... [ 36.438134] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:09:01 testing simple program... [ 36.496359] cgroup: Unknown subsys name 'net' [ 36.556836] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:08:59 Registers: info registers vcpu 0 RAX=ffff88800cf5f9c0 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800e5c0000 RSI=ffffffff818ea23d RDI=ffff88800cf5f8a8 RBP=000000000000000c RSP=ffff888016ca7df8 R8 =0000000000000004 R9 =000000000000000c R10=0000000000000040 R11=0000000000000000 R12=000000000000000c R13=ffff88800cf5f8a0 R14=dffffc0000000000 R15=000000000000005a RIP=ffffffff818ea280 RFL=00000246 [---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 00007f4acfd04700 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=00007f14c48d1618 CR3=0000000018618000 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=2030303a39303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a39303a3631203931 XMM08=3d656e696c646d632022656369767265 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=00007f01fea6a4a0 CR3=000000000ebf0000 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=dfe2ec8a69777cae5d4d11299d747966 XMM02=2c67c8bc2e329bc3000000000011dcf0 XMM03=fb795ef6d657705600000000001249c0 XMM04=a8ac797021918de100000000000ae988 XMM05=2f70a84b650149530000000000134a38 XMM06=00c3ffa147b8d8570000000000134430 XMM07=e042d86d42eb936e0000000000124c40 XMM08=bef4793d22055f02000000000011dd50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000