syzkaller login: [ 45.456065] BUG: Bad rss-counter state mm:00000000d9302d67 type:MM_FILEPAGES val:33 [ 45.457305] BUG: Bad rss-counter state mm:00000000d9302d67 type:MM_ANONPAGES val:22 [ 45.595043] ================================================================== [ 45.595988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.596930] Read of size 8 at addr ffff8880159b7798 by task sshd/221 [ 45.597703] [ 45.598018] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.598935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.599916] Call Trace: [ 45.600246] [ 45.600531] dump_stack_lvl+0x91/0xf0 [ 45.601015] print_report+0xcc/0x620 [ 45.601512] ? __virt_addr_valid+0x102/0x340 [ 45.602069] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.602743] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.603380] kasan_report+0xbe/0xf0 [ 45.603864] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.604502] vma_interval_tree_remove+0xc75/0xec0 [ 45.605118] vma_prepare+0xc54/0x11a0 [ 45.605628] __split_vma+0x5af/0x950 [ 45.606109] ? __pfx___split_vma+0x10/0x10 [ 45.606657] ? find_held_lock+0x2c/0x110 [ 45.607191] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.607782] ? lock_is_held_type+0x9f/0x120 [ 45.608336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.608957] ? mtree_range_walk+0x632/0x900 [ 45.609520] ? mas_walk+0x5c7/0x7c0 [ 45.609995] do_vmi_munmap+0x1f1/0x2b0 [ 45.610504] mmap_region+0x1f9/0x2660 [ 45.611025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.611567] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.612293] ? __pfx_lock_acquire+0x10/0x10 [ 45.612826] ? __pfx_mmap_region+0x10/0x10 [ 45.613371] ? security_mmap_addr+0x7d/0xa0 [ 45.613903] ? get_unmapped_area+0x1f5/0x3f0 [ 45.614467] do_mmap+0x854/0xf00 [ 45.614921] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.615447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.616012] ksys_mmap_pgoff+0x3af/0x500 [ 45.616537] do_syscall_64+0x3f/0x90 [ 45.617014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.617672] RIP: 0033:0x7ffae2400d82 [ 45.618129] 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 [ 45.620325] RSP: 002b:00007ffe24897ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.621241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffae2400d82 [ 45.622083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffae183a000 [ 45.622967] RBP: 00007ffae183a000 R08: 0000000000000009 R09: 0000000000001000 [ 45.623845] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fa8c7ff70 [ 45.624723] R13: 00007ffe24897bc0 R14: 00007ffe24897bf0 R15: 00007ffe24897f50 [ 45.625594] [ 45.625886] [ 45.626102] Allocated by task 214: [ 45.626544] kasan_save_stack+0x22/0x50 [ 45.627068] kasan_set_track+0x25/0x30 [ 45.627590] __kasan_slab_alloc+0x59/0x70 [ 45.628117] kmem_cache_alloc+0x16b/0x370 [ 45.628658] vm_area_dup+0x20/0x160 [ 45.629115] __split_vma+0x170/0x950 [ 45.629600] split_vma+0xc6/0x110 [ 45.630039] mprotect_fixup+0x8d2/0xb30 [ 45.630561] do_mprotect_pkey+0x87e/0xd40 [ 45.631113] __x64_sys_mprotect+0x78/0xc0 [ 45.631667] do_syscall_64+0x3f/0x90 [ 45.632139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.632804] [ 45.633021] Freed by task 214: [ 45.633432] kasan_save_stack+0x22/0x50 [ 45.633943] kasan_set_track+0x25/0x30 [ 45.634450] kasan_save_free_info+0x2b/0x50 [ 45.634999] __kasan_slab_free+0x10a/0x190 [ 45.635570] kmem_cache_free+0x10d/0x4d0 [ 45.636088] rcu_core+0x8c8/0x2860 [ 45.636556] __do_softirq+0x1b7/0x7d4 [ 45.637035] [ 45.637267] Last potentially related work creation: [ 45.637848] kasan_save_stack+0x22/0x50 [ 45.638367] __kasan_record_aux_stack+0x8e/0xa0 [ 45.638954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.639608] remove_vma+0x139/0x170 [ 45.640055] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.640641] do_vmi_munmap+0x1f1/0x2b0 [ 45.641132] __vm_munmap+0x138/0x3a0 [ 45.641611] __x64_sys_munmap+0x59/0x80 [ 45.642108] do_syscall_64+0x3f/0x90 [ 45.642595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.643271] [ 45.643490] The buggy address belongs to the object at ffff8880159b7740 [ 45.643490] which belongs to the cache vm_area_struct of size 168 [ 45.645290] The buggy address is located 88 bytes inside of [ 45.645290] freed 168-byte region [ffff8880159b7740, ffff8880159b77e8) [ 45.647210] [ 45.647504] The buggy address belongs to the physical page: [ 45.648397] page:00000000e7595fd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159b7 [ 45.649711] memcg:ffff88800f05d901 [ 45.650142] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.650831] page_type: 0xffffffff() [ 45.651299] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.652231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f05d901 [ 45.653131] page dumped because: kasan: bad access detected [ 45.653817] [ 45.654044] Memory state around the buggy address: [ 45.654652] ffff8880159b7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.655574] ffff8880159b7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.656442] >ffff8880159b7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.657305] ^ [ 45.657819] ffff8880159b7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 45.658714] ffff8880159b7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 45.659597] ================================================================== [ 45.660696] Disabling lock debugging due to kernel taint [ 47.551892] BUG: Bad rss-counter state mm:000000008dfba572 type:MM_FILEPAGES val:33 [ 47.552950] BUG: Bad rss-counter state mm:000000008dfba572 type:MM_ANONPAGES val:22 [ 48.001268] BUG: Bad rss-counter state mm:0000000048d772e2 type:MM_FILEPAGES val:33 [ 48.002249] BUG: Bad rss-counter state mm:0000000048d772e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57261' (ECDSA) to the list of known hosts. 2023/06/19 15:31:55 fuzzer started 2023/06/19 15:31:55 dialing manager at localhost:44161 2023/06/19 15:31:55 checking machine... 2023/06/19 15:31:55 checking revisions... [ 48.819773] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:31:55 testing simple program... [ 48.869892] cgroup: Unknown subsys name 'net' [ 48.931800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:41 Registers: info registers vcpu 0 RAX=1ffffd400007b459 RBX=ffffea00003da2c8 RCX=ffff88806ce40140 RDX=1ffffd400007b41a RSI=0000000000000000 RDI=ffffea00003da0d0 RBP=ffff88806ce40190 RSP=ffff88800ff2f490 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000001 R13=ffffea00003da0c8 R14=dffffc0000000000 R15=ffff88807ffdc500 RIP=ffffffff81792eaa 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 00007fe501840900 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=00007ff51e46a760 CR3=0000000013e28000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 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=00007ffe4d286c78 CR3=0000000019fb4000 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=2035353a31333a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000