syzkaller login: [ 35.188968] BUG: Bad rss-counter state mm:00000000edbf235c type:MM_FILEPAGES val:33 [ 35.189662] BUG: Bad rss-counter state mm:00000000edbf235c type:MM_ANONPAGES val:22 [ 35.244813] ================================================================== [ 35.245455] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.246077] Read of size 8 at addr ffff888015c8ca50 by task sshd/219 [ 35.246572] [ 35.246721] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.247286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.247930] Call Trace: [ 35.248148] [ 35.248339] dump_stack_lvl+0x91/0xf0 [ 35.248674] print_report+0xcc/0x620 [ 35.249030] ? __virt_addr_valid+0x102/0x340 [ 35.249385] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.249788] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.250183] kasan_report+0xbe/0xf0 [ 35.250498] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.250902] vma_interval_tree_remove+0xc75/0xec0 [ 35.251292] vma_prepare+0xc54/0x11a0 [ 35.251616] __split_vma+0x5af/0x950 [ 35.251937] ? __pfx___split_vma+0x10/0x10 [ 35.252296] ? find_held_lock+0x2c/0x110 [ 35.252644] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.257095] ? mas_destroy+0x1fe/0x8b0 [ 35.257440] ? lock_is_held_type+0x9f/0x120 [ 35.257800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.258195] ? mtree_range_walk+0x632/0x900 [ 35.258559] ? mas_walk+0x5c7/0x7c0 [ 35.258886] do_vmi_munmap+0x1f1/0x2b0 [ 35.259216] mmap_region+0x1f9/0x2660 [ 35.259540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.259882] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.260349] ? __pfx_lock_acquire+0x10/0x10 [ 35.260702] ? __pfx_mmap_region+0x10/0x10 [ 35.261096] ? security_mmap_addr+0x7d/0xa0 [ 35.261452] ? get_unmapped_area+0x1f5/0x3f0 [ 35.261819] do_mmap+0x854/0xf00 [ 35.262112] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.262440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.262821] ksys_mmap_pgoff+0x3af/0x500 [ 35.263161] do_syscall_64+0x3f/0x90 [ 35.263483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.263916] RIP: 0033:0x7f7095329d82 [ 35.264222] 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 [ 35.265611] RSP: 002b:00007ffc75386328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.266207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7095329d82 [ 35.266772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7094763000 [ 35.267330] RBP: 00007f7094763000 R08: 0000000000000009 R09: 0000000000001000 [ 35.267889] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd50a41f60 [ 35.268439] R13: 00007ffc75386340 R14: 00007ffc75386370 R15: 00007ffc753866d0 [ 35.269016] [ 35.269215] [ 35.272077] Allocated by task 212: [ 35.272366] kasan_save_stack+0x22/0x50 [ 35.272707] kasan_set_track+0x25/0x30 [ 35.273141] __kasan_slab_alloc+0x59/0x70 [ 35.273495] kmem_cache_alloc+0x16b/0x370 [ 35.273844] vm_area_dup+0x20/0x160 [ 35.274152] __split_vma+0x170/0x950 [ 35.274467] split_vma+0xc6/0x110 [ 35.274765] mprotect_fixup+0x8d2/0xb30 [ 35.275095] do_mprotect_pkey+0x87e/0xd40 [ 35.275436] __x64_sys_mprotect+0x78/0xc0 [ 35.275781] do_syscall_64+0x3f/0x90 [ 35.276094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.276529] [ 35.276675] Freed by task 212: [ 35.276991] kasan_save_stack+0x22/0x50 [ 35.277324] kasan_set_track+0x25/0x30 [ 35.277655] kasan_save_free_info+0x2b/0x50 [ 35.278009] __kasan_slab_free+0x10a/0x190 [ 35.278356] kmem_cache_free+0x10d/0x4d0 [ 35.278690] rcu_core+0x8c8/0x2860 [ 35.278984] __do_softirq+0x1b7/0x7d4 [ 35.279301] [ 35.279446] Last potentially related work creation: [ 35.279838] kasan_save_stack+0x22/0x50 [ 35.280175] __kasan_record_aux_stack+0x8e/0xa0 [ 35.280559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.281030] remove_vma+0x139/0x170 [ 35.281324] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.281692] do_vmi_munmap+0x1f1/0x2b0 [ 35.282017] __vm_munmap+0x138/0x3a0 [ 35.282331] __x64_sys_munmap+0x59/0x80 [ 35.282677] do_syscall_64+0x3f/0x90 [ 35.282999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.283423] [ 35.283567] The buggy address belongs to the object at ffff888015c8c9f8 [ 35.283567] which belongs to the cache vm_area_struct of size 168 [ 35.284530] The buggy address is located 88 bytes inside of [ 35.284530] freed 168-byte region [ffff888015c8c9f8, ffff888015c8caa0) [ 35.285459] [ 35.285606] The buggy address belongs to the physical page: [ 35.286035] page:000000009e22c87c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c8c [ 35.286752] memcg:ffff8880145dd401 [ 35.287033] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.287452] page_type: 0xffffffff() [ 35.287754] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.288353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145dd401 [ 35.288992] page dumped because: kasan: bad access detected [ 35.289432] [ 35.289574] Memory state around the buggy address: [ 35.289938] ffff888015c8c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.290500] ffff888015c8c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.291031] >ffff888015c8ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.291596] ^ [ 35.292055] ffff888015c8ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.292617] ffff888015c8cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.297259] ================================================================== [ 35.298056] Disabling lock debugging due to kernel taint [ 37.283097] BUG: Bad rss-counter state mm:0000000048727209 type:MM_FILEPAGES val:33 [ 37.283773] BUG: Bad rss-counter state mm:0000000048727209 type:MM_ANONPAGES val:22 [ 38.303670] BUG: Bad rss-counter state mm:00000000da6f10a0 type:MM_FILEPAGES val:33 [ 38.304396] BUG: Bad rss-counter state mm:00000000da6f10a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26925' (ECDSA) to the list of known hosts. 2023/06/21 10:06:53 fuzzer started 2023/06/21 10:06:53 dialing manager at localhost:36067 2023/06/21 10:06:53 checking machine... 2023/06/21 10:06:53 checking revisions... [ 39.345281] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:06:54 testing simple program... [ 39.402218] cgroup: Unknown subsys name 'net' [ 39.454569] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:06:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8453e25970 CR3=000000000f244000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=acf51a7aa15dd34900000000001330a0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=550d3df4e262ce0d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000563189ce74d0 CR3=0000000017a06000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000