syzkaller login: [ 29.082277] BUG: Bad rss-counter state mm:000000003be28a72 type:MM_FILEPAGES val:33 [ 29.083474] BUG: Bad rss-counter state mm:000000003be28a72 type:MM_ANONPAGES val:22 [ 29.120414] ================================================================== [ 29.121411] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.122367] Read of size 8 at addr ffff88800ee22140 by task sshd/220 [ 29.123231] [ 29.123452] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.124326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.125343] Call Trace: [ 29.125662] [ 29.125953] dump_stack_lvl+0x91/0xf0 [ 29.126444] print_report+0xcc/0x620 [ 29.126937] ? __virt_addr_valid+0x102/0x340 [ 29.127499] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.128124] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.128768] kasan_report+0xbe/0xf0 [ 29.129277] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.129914] vma_interval_tree_remove+0xc75/0xec0 [ 29.130521] vma_prepare+0xc54/0x11a0 [ 29.131002] __split_vma+0x5af/0x950 [ 29.131480] ? __pfx___split_vma+0x10/0x10 [ 29.132011] ? find_held_lock+0x2c/0x110 [ 29.132534] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.133101] ? lock_is_held_type+0x9f/0x120 [ 29.133657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.134265] ? mtree_range_walk+0x632/0x900 [ 29.134815] ? mas_walk+0x5c7/0x7c0 [ 29.135292] do_vmi_munmap+0x1f1/0x2b0 [ 29.135789] mmap_region+0x1f9/0x2660 [ 29.136274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.136797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.137516] ? __pfx_lock_acquire+0x10/0x10 [ 29.138053] ? __pfx_mmap_region+0x10/0x10 [ 29.138584] ? security_mmap_addr+0x7d/0xa0 [ 29.139128] ? get_unmapped_area+0x1f5/0x3f0 [ 29.139682] do_mmap+0x854/0xf00 [ 29.140121] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.140623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.141193] ksys_mmap_pgoff+0x3af/0x500 [ 29.141704] do_syscall_64+0x3f/0x90 [ 29.142189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.142840] RIP: 0033:0x7f58489f6d82 [ 29.143296] 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 [ 29.145450] RSP: 002b:00007ffd395b0e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.146357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58489f6d82 [ 29.147211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5847e30000 [ 29.148062] RBP: 00007f5847e30000 R08: 0000000000000009 R09: 0000000000001000 [ 29.148907] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561284ccfec0 [ 29.149765] R13: 00007ffd395b0e50 R14: 00007ffd395b0e80 R15: 00007ffd395b11e0 [ 29.150622] [ 29.150923] [ 29.151137] Allocated by task 213: [ 29.151569] kasan_save_stack+0x22/0x50 [ 29.152079] kasan_set_track+0x25/0x30 [ 29.152576] __kasan_slab_alloc+0x59/0x70 [ 29.153111] kmem_cache_alloc+0x16b/0x370 [ 29.153657] vm_area_dup+0x20/0x160 [ 29.154113] __split_vma+0x170/0x950 [ 29.154584] split_vma+0xc6/0x110 [ 29.155047] mprotect_fixup+0x8d2/0xb30 [ 29.155562] do_mprotect_pkey+0x87e/0xd40 [ 29.156094] __x64_sys_mprotect+0x78/0xc0 [ 29.156618] do_syscall_64+0x3f/0x90 [ 29.157091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.157745] [ 29.157961] Freed by task 213: [ 29.158351] kasan_save_stack+0x22/0x50 [ 29.158863] kasan_set_track+0x25/0x30 [ 29.159355] kasan_save_free_info+0x2b/0x50 [ 29.159893] __kasan_slab_free+0x10a/0x190 [ 29.160432] kmem_cache_free+0x10d/0x4d0 [ 29.160949] rcu_core+0x8c8/0x2860 [ 29.161401] __do_softirq+0x1b7/0x7d4 [ 29.161882] [ 29.162100] Last potentially related work creation: [ 29.162688] kasan_save_stack+0x22/0x50 [ 29.163189] __kasan_record_aux_stack+0x8e/0xa0 [ 29.163773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.164420] remove_vma+0x139/0x170 [ 29.164876] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.165450] do_vmi_munmap+0x1f1/0x2b0 [ 29.165938] __vm_munmap+0x138/0x3a0 [ 29.166412] __x64_sys_munmap+0x59/0x80 [ 29.166911] do_syscall_64+0x3f/0x90 [ 29.167383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.168026] [ 29.168240] The buggy address belongs to the object at ffff88800ee220e8 [ 29.168240] which belongs to the cache vm_area_struct of size 168 [ 29.169723] The buggy address is located 88 bytes inside of [ 29.169723] freed 168-byte region [ffff88800ee220e8, ffff88800ee22190) [ 29.171130] [ 29.171347] The buggy address belongs to the physical page: [ 29.172006] page:0000000071c019b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee22 [ 29.173092] memcg:ffff88800c7c2b01 [ 29.173541] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.174189] page_type: 0xffffffff() [ 29.174642] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.175559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7c2b01 [ 29.176461] page dumped because: kasan: bad access detected [ 29.177122] [ 29.177354] Memory state around the buggy address: [ 29.177935] ffff88800ee22000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.178793] ffff88800ee22080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 29.179659] >ffff88800ee22100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.180515] ^ [ 29.181174] ffff88800ee22180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.182038] ffff88800ee22200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.182906] ================================================================== [ 29.184063] Disabling lock debugging due to kernel taint [ 31.583637] BUG: Bad rss-counter state mm:000000006cb49d9d type:MM_FILEPAGES val:33 [ 31.585082] BUG: Bad rss-counter state mm:000000006cb49d9d type:MM_ANONPAGES val:22 [ 32.143304] BUG: Bad rss-counter state mm:000000005dc0a76a type:MM_FILEPAGES val:33 [ 32.144522] BUG: Bad rss-counter state mm:000000005dc0a76a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45379' (ECDSA) to the list of known hosts. 2023/06/20 01:04:52 fuzzer started 2023/06/20 01:04:52 dialing manager at localhost:44161 2023/06/20 01:04:52 checking machine... 2023/06/20 01:04:52 checking revisions... [ 32.790883] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:04:53 testing simple program... [ 32.841925] cgroup: Unknown subsys name 'net' [ 32.877157] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:52 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=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fa0a2749fe0 CR3=000000000ec92000 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=b8bec7d76e2cc3884b45e4998c8ca233 XMM02=000000000011d660ec2efd57dc4c00df XMM03=000000000012435037aebb8b73fa0e68 XMM04=2c7b0301168ad54100000000000ae988 XMM05=716cd042fe88ed390000000000134118 XMM06=4fda316b135da52b0000000000133da0 XMM07=e042d86d42eb936e00000000001245d0 XMM08=37aebb8b73fa0e68000000000011d6c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b15f4 RDX=1ffff11002c35e9e RSI=1ffff11002c35e9d RDI=1ffff11002c35e9d RBP=ffff8880161af4e8 RSP=ffff8880161af420 R8 =ffffffff863b15f8 R9 =ffff8880161af4d0 R10=0000000000038001 R11=000000000008a85c R12=ffff8880161af4f0 R13=ffff8880161af4d8 R14=ffff8880161afcb0 R15=ffff8880161af490 RIP=ffffffff811310ce 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 00007fc429608900 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=00007fc429bbf618 CR3=0000000016228000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000