syzkaller login: [ 45.504825] BUG: Bad rss-counter state mm:000000009d071622 type:MM_FILEPAGES val:33 [ 45.505429] BUG: Bad rss-counter state mm:000000009d071622 type:MM_ANONPAGES val:22 [ 45.675520] ================================================================== [ 45.676104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.676663] Read of size 8 at addr ffff88800df225c8 by task sshd/230 [ 45.677129] [ 45.677265] CPU: 0 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.677841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.678481] Call Trace: [ 45.678717] [ 45.678897] dump_stack_lvl+0x91/0xf0 [ 45.679202] print_report+0xcc/0x620 [ 45.679551] ? __virt_addr_valid+0x102/0x340 [ 45.679893] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.680276] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.680674] kasan_report+0xbe/0xf0 [ 45.680970] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.681342] vma_interval_tree_remove+0xc75/0xec0 [ 45.681697] vma_prepare+0xc54/0x11a0 [ 45.681985] __split_vma+0x5af/0x950 [ 45.682268] ? __pfx___split_vma+0x10/0x10 [ 45.682658] ? find_held_lock+0x2c/0x110 [ 45.682981] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.683349] ? lock_is_held_type+0x9f/0x120 [ 45.683698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.684068] ? mtree_range_walk+0x632/0x900 [ 45.684432] ? mas_walk+0x5c7/0x7c0 [ 45.684749] do_vmi_munmap+0x1f1/0x2b0 [ 45.685052] mmap_region+0x1f9/0x2660 [ 45.685371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.685685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.686118] ? __pfx_lock_acquire+0x10/0x10 [ 45.686475] ? __pfx_mmap_region+0x10/0x10 [ 45.686862] ? security_mmap_addr+0x7d/0xa0 [ 45.687193] ? get_unmapped_area+0x1f5/0x3f0 [ 45.687564] do_mmap+0x854/0xf00 [ 45.687841] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.688140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.688488] ksys_mmap_pgoff+0x3af/0x500 [ 45.688802] do_syscall_64+0x3f/0x90 [ 45.689088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.689531] RIP: 0033:0x7fb5287ebd82 [ 45.689817] 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 [ 45.691176] RSP: 002b:00007ffd2c592d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.691783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5287ebd82 [ 45.692315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb527c25000 [ 45.692848] RBP: 00007fb527c25000 R08: 0000000000000009 R09: 0000000000001000 [ 45.693361] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bad9993f70 [ 45.693861] R13: 00007ffd2c592d60 R14: 00007ffd2c592d90 R15: 00007ffd2c5930f0 [ 45.694383] [ 45.694579] [ 45.694753] Allocated by task 221: [ 45.695023] kasan_save_stack+0x22/0x50 [ 45.695355] kasan_set_track+0x25/0x30 [ 45.695678] __kasan_slab_alloc+0x59/0x70 [ 45.696003] kmem_cache_alloc+0x16b/0x370 [ 45.696324] vm_area_dup+0x20/0x160 [ 45.696641] __split_vma+0x170/0x950 [ 45.696925] split_vma+0xc6/0x110 [ 45.697188] mprotect_fixup+0x8d2/0xb30 [ 45.697499] do_mprotect_pkey+0x87e/0xd40 [ 45.697813] __x64_sys_mprotect+0x78/0xc0 [ 45.698131] do_syscall_64+0x3f/0x90 [ 45.698418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.698839] [ 45.698971] Freed by task 0: [ 45.699193] kasan_save_stack+0x22/0x50 [ 45.699509] kasan_set_track+0x25/0x30 [ 45.699804] kasan_save_free_info+0x2b/0x50 [ 45.700129] __kasan_slab_free+0x10a/0x190 [ 45.700458] kmem_cache_free+0x10d/0x4d0 [ 45.700759] rcu_core+0x8c8/0x2860 [ 45.701031] __do_softirq+0x1b7/0x7d4 [ 45.701326] [ 45.701464] Last potentially related work creation: [ 45.701810] kasan_save_stack+0x22/0x50 [ 45.702123] __kasan_record_aux_stack+0x8e/0xa0 [ 45.702475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.702900] remove_vma+0x139/0x170 [ 45.703181] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.703521] do_vmi_munmap+0x1f1/0x2b0 [ 45.703820] __vm_munmap+0x138/0x3a0 [ 45.704107] __x64_sys_munmap+0x59/0x80 [ 45.704414] do_syscall_64+0x3f/0x90 [ 45.704703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.705093] [ 45.705230] The buggy address belongs to the object at ffff88800df22570 [ 45.705230] which belongs to the cache vm_area_struct of size 168 [ 45.706108] The buggy address is located 88 bytes inside of [ 45.706108] freed 168-byte region [ffff88800df22570, ffff88800df22618) [ 45.711034] [ 45.711175] The buggy address belongs to the physical page: [ 45.711588] page:00000000d3e10159 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf22 [ 45.712256] memcg:ffff88800e4fca01 [ 45.712519] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.712917] page_type: 0xffffffff() [ 45.713208] raw: 0100000000000200 ffff88800879fc80 ffffea0000364dc0 dead00000000000a [ 45.713786] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4fca01 [ 45.714342] page dumped because: kasan: bad access detected [ 45.714802] [ 45.714938] Memory state around the buggy address: [ 45.715297] ffff88800df22480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.715824] ffff88800df22500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 45.716352] >ffff88800df22580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.716918] ^ [ 45.717336] ffff88800df22600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 45.717859] ffff88800df22680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.718381] ================================================================== [ 45.719431] Disabling lock debugging due to kernel taint [ 49.334721] BUG: Bad rss-counter state mm:00000000602493f5 type:MM_FILEPAGES val:33 [ 49.335300] BUG: Bad rss-counter state mm:00000000602493f5 type:MM_ANONPAGES val:22 [ 50.083942] BUG: Bad rss-counter state mm:000000004a469298 type:MM_FILEPAGES val:33 [ 50.084506] BUG: Bad rss-counter state mm:000000004a469298 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14617' (ECDSA) to the list of known hosts. 2023/06/20 10:22:54 fuzzer started 2023/06/20 10:22:54 dialing manager at localhost:44161 2023/06/20 10:22:54 checking machine... 2023/06/20 10:22:54 checking revisions... [ 50.890734] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:22:54 testing simple program... [ 50.944840] cgroup: Unknown subsys name 'net' [ 51.018466] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:22:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 0000000000000000 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=00007ff6f51f7328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=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 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=00007f38e86dea60 CR3=0000000013680000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=8431dabb293957f40000000000136268 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=78d5ecbf5e7bac8f00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000