syzkaller login: [ 35.395145] BUG: Bad rss-counter state mm:00000000ea9fffac type:MM_FILEPAGES val:33 [ 35.396773] BUG: Bad rss-counter state mm:00000000ea9fffac type:MM_ANONPAGES val:22 [ 35.557455] ================================================================== [ 35.558548] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.559671] Read of size 8 at addr ffff888016712ed8 by task sshd/220 [ 35.560725] [ 35.560942] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.561805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.562800] Call Trace: [ 35.563122] [ 35.563410] dump_stack_lvl+0x91/0xf0 [ 35.563902] print_report+0xcc/0x620 [ 35.564389] ? __virt_addr_valid+0x102/0x340 [ 35.564963] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.565592] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.566208] kasan_report+0xbe/0xf0 [ 35.566684] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.567308] vma_interval_tree_remove+0xc75/0xec0 [ 35.567912] vma_prepare+0xc54/0x11a0 [ 35.568390] __split_vma+0x5af/0x950 [ 35.568880] ? __pfx___split_vma+0x10/0x10 [ 35.569410] ? find_held_lock+0x2c/0x110 [ 35.569933] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.570507] ? lock_is_held_type+0x9f/0x120 [ 35.571049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.571663] ? mtree_range_walk+0x632/0x900 [ 35.572215] ? mas_walk+0x5c7/0x7c0 [ 35.572712] do_vmi_munmap+0x1f1/0x2b0 [ 35.573213] mmap_region+0x1f9/0x2660 [ 35.573700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.574216] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.574945] ? __pfx_lock_acquire+0x10/0x10 [ 35.575488] ? __pfx_mmap_region+0x10/0x10 [ 35.576025] ? security_mmap_addr+0x7d/0xa0 [ 35.576569] ? get_unmapped_area+0x1f5/0x3f0 [ 35.577133] do_mmap+0x854/0xf00 [ 35.577589] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.578084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.578654] ksys_mmap_pgoff+0x3af/0x500 [ 35.579173] do_syscall_64+0x3f/0x90 [ 35.579659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.580306] RIP: 0033:0x7f7eb2bb9d82 [ 35.580785] 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 [ 35.582939] RSP: 002b:00007ffeacbd5558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.583857] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7eb2bb9d82 [ 35.584744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7eb1ff3000 [ 35.585596] RBP: 00007f7eb1ff3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.586457] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9bae36d90 [ 35.587323] R13: 00007ffeacbd5570 R14: 00007ffeacbd55a0 R15: 00007ffeacbd5900 [ 35.588184] [ 35.588488] [ 35.588707] Allocated by task 213: [ 35.589138] kasan_save_stack+0x22/0x50 [ 35.589645] kasan_set_track+0x25/0x30 [ 35.590171] __kasan_slab_alloc+0x59/0x70 [ 35.590699] kmem_cache_alloc+0x16b/0x370 [ 35.591212] vm_area_dup+0x20/0x160 [ 35.591712] __split_vma+0x170/0x950 [ 35.592192] split_vma+0xc6/0x110 [ 35.592671] mprotect_fixup+0x8d2/0xb30 [ 35.593192] do_mprotect_pkey+0x87e/0xd40 [ 35.593728] __x64_sys_mprotect+0x78/0xc0 [ 35.594265] do_syscall_64+0x3f/0x90 [ 35.594751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.595421] [ 35.595642] Freed by task 13: [ 35.596045] kasan_save_stack+0x22/0x50 [ 35.596576] kasan_set_track+0x25/0x30 [ 35.597083] kasan_save_free_info+0x2b/0x50 [ 35.597622] __kasan_slab_free+0x10a/0x190 [ 35.598173] kmem_cache_free+0x10d/0x4d0 [ 35.598685] rcu_core+0x8c8/0x2860 [ 35.599137] __do_softirq+0x1b7/0x7d4 [ 35.599624] [ 35.599843] Last potentially related work creation: [ 35.600459] kasan_save_stack+0x22/0x50 [ 35.600967] __kasan_record_aux_stack+0x8e/0xa0 [ 35.601599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.602255] remove_vma+0x139/0x170 [ 35.602713] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.603283] do_vmi_munmap+0x1f1/0x2b0 [ 35.603793] __vm_munmap+0x138/0x3a0 [ 35.604276] __x64_sys_munmap+0x59/0x80 [ 35.604783] do_syscall_64+0x3f/0x90 [ 35.605254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.605889] [ 35.606111] The buggy address belongs to the object at ffff888016712e80 [ 35.606111] which belongs to the cache vm_area_struct of size 168 [ 35.607589] The buggy address is located 88 bytes inside of [ 35.607589] freed 168-byte region [ffff888016712e80, ffff888016712f28) [ 35.609001] [ 35.609216] The buggy address belongs to the physical page: [ 35.609881] page:00000000516d2f94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16712 [ 35.610979] memcg:ffff888015ee7701 [ 35.611410] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.612060] page_type: 0xffffffff() [ 35.612540] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.613470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ee7701 [ 35.614393] page dumped because: kasan: bad access detected [ 35.615067] [ 35.615281] Memory state around the buggy address: [ 35.615865] ffff888016712d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.616755] ffff888016712e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.617619] >ffff888016712e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.618475] ^ [ 35.619212] ffff888016712f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.620076] ffff888016712f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.620949] ================================================================== [ 35.621867] Disabling lock debugging due to kernel taint [ 37.510341] BUG: Bad rss-counter state mm:000000007c595e86 type:MM_FILEPAGES val:33 [ 37.511783] BUG: Bad rss-counter state mm:000000007c595e86 type:MM_ANONPAGES val:22 [ 37.924206] BUG: Bad rss-counter state mm:00000000f6ba00b3 type:MM_FILEPAGES val:33 [ 37.924926] BUG: Bad rss-counter state mm:00000000f6ba00b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65290' (ECDSA) to the list of known hosts. 2023/06/19 22:56:12 fuzzer started 2023/06/19 22:56:12 dialing manager at localhost:44161 2023/06/19 22:56:12 checking machine... 2023/06/19 22:56:12 checking revisions... [ 38.606208] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:56:12 testing simple program... [ 38.657982] cgroup: Unknown subsys name 'net' [ 38.705021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:56:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801477fdf0 RCX=ffffffff8185992e RDX=ffff888019088000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000088000 RSP=ffff88801477fd80 R8 =0000000000000007 R9 =0000000000010040 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff88801477fea8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c03b8 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 00007fde8571f900 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=00007fde85cd70b0 CR3=000000000e73c000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f8f21b1f8d0 CR3=000000000c732000 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=962f0d9283f2c38d8d44ab4cb85ca9ac XMM02=000000000011d700ec2efd57dc4c00df XMM03=00000000001247f0303b49de13e36716 XMM04=173dba11788a10d800000000000ae988 XMM05=19e9129bd510f23500000000001342f0 XMM06=980600ec2666cd750000000000133158 XMM07=e042d86d42eb936e0000000000124a70 XMM08=303b49de13e36716000000000011d760 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000