syzkaller login: [ 38.681401] BUG: Bad rss-counter state mm:000000009d5707c1 type:MM_FILEPAGES val:33 [ 38.682399] BUG: Bad rss-counter state mm:000000009d5707c1 type:MM_ANONPAGES val:22 [ 38.840270] ================================================================== [ 38.841203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.842142] Read of size 8 at addr ffff88800db23ed8 by task sshd/219 [ 38.842903] [ 38.843122] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.844066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.845054] Call Trace: [ 38.845375] [ 38.845695] dump_stack_lvl+0x91/0xf0 [ 38.846185] print_report+0xcc/0x620 [ 38.846670] ? __virt_addr_valid+0x102/0x340 [ 38.847222] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847843] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.848462] kasan_report+0xbe/0xf0 [ 38.848965] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849588] vma_interval_tree_remove+0xc75/0xec0 [ 38.850183] vma_prepare+0xc54/0x11a0 [ 38.850660] __split_vma+0x5af/0x950 [ 38.851126] ? __pfx___split_vma+0x10/0x10 [ 38.851645] ? find_held_lock+0x2c/0x110 [ 38.852158] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.852721] ? lock_is_held_type+0x9f/0x120 [ 38.853271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.853877] ? mtree_range_walk+0x632/0x900 [ 38.854427] ? mas_walk+0x5c7/0x7c0 [ 38.854902] do_vmi_munmap+0x1f1/0x2b0 [ 38.855390] mmap_region+0x1f9/0x2660 [ 38.855864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.856373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.857097] ? __pfx_lock_acquire+0x10/0x10 [ 38.857628] ? __pfx_mmap_region+0x10/0x10 [ 38.858150] ? security_mmap_addr+0x7d/0xa0 [ 38.858679] ? get_unmapped_area+0x1f5/0x3f0 [ 38.859224] do_mmap+0x854/0xf00 [ 38.859669] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.860168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.860720] ksys_mmap_pgoff+0x3af/0x500 [ 38.861230] do_syscall_64+0x3f/0x90 [ 38.861704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862351] RIP: 0033:0x7f6485231d82 [ 38.862801] 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 [ 38.864932] RSP: 002b:00007ffe4b13a788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.865835] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6485231d82 [ 38.866686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f648466b000 [ 38.867535] RBP: 00007f648466b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.868391] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611cf79dec0 [ 38.869244] R13: 00007ffe4b13a7a0 R14: 00007ffe4b13a7d0 R15: 00007ffe4b13ab30 [ 38.870083] [ 38.870370] [ 38.870583] Allocated by task 212: [ 38.871013] kasan_save_stack+0x22/0x50 [ 38.871521] kasan_set_track+0x25/0x30 [ 38.872010] __kasan_slab_alloc+0x59/0x70 [ 38.872526] kmem_cache_alloc+0x16b/0x370 [ 38.873050] vm_area_dup+0x20/0x160 [ 38.873504] __split_vma+0x170/0x950 [ 38.873973] split_vma+0xc6/0x110 [ 38.874404] mprotect_fixup+0x8d2/0xb30 [ 38.874900] do_mprotect_pkey+0x87e/0xd40 [ 38.875415] __x64_sys_mprotect+0x78/0xc0 [ 38.875927] do_syscall_64+0x3f/0x90 [ 38.876393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877060] [ 38.877272] Freed by task 212: [ 38.877658] kasan_save_stack+0x22/0x50 [ 38.878156] kasan_set_track+0x25/0x30 [ 38.878648] kasan_save_free_info+0x2b/0x50 [ 38.879177] __kasan_slab_free+0x10a/0x190 [ 38.879707] kmem_cache_free+0x10d/0x4d0 [ 38.880209] rcu_core+0x8c8/0x2860 [ 38.880645] __do_softirq+0x1b7/0x7d4 [ 38.881123] [ 38.881339] Last potentially related work creation: [ 38.881915] kasan_save_stack+0x22/0x50 [ 38.882414] __kasan_record_aux_stack+0x8e/0xa0 [ 38.882981] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.883621] remove_vma+0x139/0x170 [ 38.884070] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.884626] do_vmi_munmap+0x1f1/0x2b0 [ 38.885123] __vm_munmap+0x138/0x3a0 [ 38.885586] __x64_sys_munmap+0x59/0x80 [ 38.886078] do_syscall_64+0x3f/0x90 [ 38.886552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887196] [ 38.887409] Second to last potentially related work creation: [ 38.888078] kasan_save_stack+0x22/0x50 [ 38.888570] __kasan_record_aux_stack+0x8e/0xa0 [ 38.889147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.889787] remove_vma+0x139/0x170 [ 38.890230] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.890780] do_vmi_munmap+0x1f1/0x2b0 [ 38.891257] mmap_region+0x1f9/0x2660 [ 38.891731] do_mmap+0x854/0xf00 [ 38.892156] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.892640] ksys_mmap_pgoff+0x3af/0x500 [ 38.893141] do_syscall_64+0x3f/0x90 [ 38.893615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.894254] [ 38.894465] The buggy address belongs to the object at ffff88800db23e80 [ 38.894465] which belongs to the cache vm_area_struct of size 168 [ 38.895910] The buggy address is located 88 bytes inside of [ 38.895910] freed 168-byte region [ffff88800db23e80, ffff88800db23f28) [ 38.897329] [ 38.897550] The buggy address belongs to the physical page: [ 38.898203] page:00000000451a1510 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb23 [ 38.899282] memcg:ffff88800e327501 [ 38.899706] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.900396] page_type: 0xffffffff() [ 38.900853] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d31c0 dead00000000000d [ 38.901756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e327501 [ 38.902650] page dumped because: kasan: bad access detected [ 38.903303] [ 38.903520] Memory state around the buggy address: [ 38.904103] ffff88800db23d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.904959] ffff88800db23e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.905816] >ffff88800db23e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.906661] ^ [ 38.907376] ffff88800db23f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.908230] ffff88800db23f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.909098] ================================================================== [ 38.910049] Disabling lock debugging due to kernel taint [ 40.754502] BUG: Bad rss-counter state mm:00000000818ba204 type:MM_FILEPAGES val:33 [ 40.755666] BUG: Bad rss-counter state mm:00000000818ba204 type:MM_ANONPAGES val:22 [ 41.115069] BUG: Bad rss-counter state mm:00000000fc5f4ce5 type:MM_FILEPAGES val:33 [ 41.116054] BUG: Bad rss-counter state mm:00000000fc5f4ce5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37872' (ECDSA) to the list of known hosts. 2023/06/21 02:27:05 fuzzer started 2023/06/21 02:27:05 dialing manager at localhost:36067 2023/06/21 02:27:05 checking machine... 2023/06/21 02:27:05 checking revisions... [ 41.821463] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:27:05 testing simple program... [ 41.877456] cgroup: Unknown subsys name 'net' [ 41.913851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:27:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 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 00007fdf40d50900 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=00007fffd4c96000 CR3=000000000e5c2000 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=ffff888008c04400 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=00007fb8e8539d20 CR3=000000000c77e000 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=2034303a37323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a37323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000