syzkaller login: [ 31.049013] BUG: Bad rss-counter state mm:00000000bfecd907 type:MM_FILEPAGES val:33 [ 31.049716] BUG: Bad rss-counter state mm:00000000bfecd907 type:MM_ANONPAGES val:22 [ 31.156333] ================================================================== [ 31.157021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.157742] Read of size 8 at addr ffff8880097af058 by task sshd/220 [ 31.158300] [ 31.158454] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.159065] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.159743] Call Trace: [ 31.159968] [ 31.160168] dump_stack_lvl+0x91/0xf0 [ 31.160512] print_report+0xcc/0x620 [ 31.160855] ? __virt_addr_valid+0x102/0x340 [ 31.161337] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161728] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162039] kasan_report+0xbe/0xf0 [ 31.162281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162596] vma_interval_tree_remove+0xc75/0xec0 [ 31.162916] vma_prepare+0xc54/0x11a0 [ 31.163170] __split_vma+0x5af/0x950 [ 31.163411] ? __pfx___split_vma+0x10/0x10 [ 31.163682] ? find_held_lock+0x2c/0x110 [ 31.163947] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.164233] ? lock_is_held_type+0x9f/0x120 [ 31.164506] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.164813] ? mtree_range_walk+0x632/0x900 [ 31.165091] ? mas_walk+0x5c7/0x7c0 [ 31.165332] do_vmi_munmap+0x1f1/0x2b0 [ 31.165580] mmap_region+0x1f9/0x2660 [ 31.165823] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.166081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.166437] ? __pfx_lock_acquire+0x10/0x10 [ 31.166705] ? __pfx_mmap_region+0x10/0x10 [ 31.166978] ? security_mmap_addr+0x7d/0xa0 [ 31.167244] ? get_unmapped_area+0x1f5/0x3f0 [ 31.167519] do_mmap+0x854/0xf00 [ 31.167741] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.167990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.168273] ksys_mmap_pgoff+0x3af/0x500 [ 31.168527] do_syscall_64+0x3f/0x90 [ 31.168770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169095] RIP: 0033:0x7f4f2739ad82 [ 31.169324] 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 [ 31.170383] RSP: 002b:00007fff492478b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.170853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f2739ad82 [ 31.171276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f267d4000 [ 31.171700] RBP: 00007f4f267d4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.172122] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e18b4cb20 [ 31.172544] R13: 00007fff492478d0 R14: 00007fff49247900 R15: 00007fff49247c60 [ 31.172973] [ 31.173121] [ 31.173231] Allocated by task 213: [ 31.173447] kasan_save_stack+0x22/0x50 [ 31.173701] kasan_set_track+0x25/0x30 [ 31.173951] __kasan_slab_alloc+0x59/0x70 [ 31.174214] kmem_cache_alloc+0x16b/0x370 [ 31.174474] vm_area_dup+0x20/0x160 [ 31.174704] __split_vma+0x170/0x950 [ 31.174950] split_vma+0xc6/0x110 [ 31.175172] mprotect_fixup+0x8d2/0xb30 [ 31.175424] do_mprotect_pkey+0x87e/0xd40 [ 31.175685] __x64_sys_mprotect+0x78/0xc0 [ 31.175947] do_syscall_64+0x3f/0x90 [ 31.176186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176507] [ 31.176617] Freed by task 19: [ 31.176810] kasan_save_stack+0x22/0x50 [ 31.177063] kasan_set_track+0x25/0x30 [ 31.177311] kasan_save_free_info+0x2b/0x50 [ 31.177578] __kasan_slab_free+0x10a/0x190 [ 31.177846] kmem_cache_free+0x10d/0x4d0 [ 31.178102] rcu_core+0x8c8/0x2860 [ 31.178325] __do_softirq+0x1b7/0x7d4 [ 31.178565] [ 31.178674] Last potentially related work creation: [ 31.178978] kasan_save_stack+0x22/0x50 [ 31.179231] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.179842] remove_vma+0x139/0x170 [ 31.180069] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.180348] do_vmi_munmap+0x1f1/0x2b0 [ 31.180592] __vm_munmap+0x138/0x3a0 [ 31.180828] __x64_sys_munmap+0x59/0x80 [ 31.181078] do_syscall_64+0x3f/0x90 [ 31.181316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181638] [ 31.181748] The buggy address belongs to the object at ffff8880097af000 [ 31.181748] which belongs to the cache vm_area_struct of size 168 [ 31.182474] The buggy address is located 88 bytes inside of [ 31.182474] freed 168-byte region [ffff8880097af000, ffff8880097af0a8) [ 31.183184] [ 31.183294] The buggy address belongs to the physical page: [ 31.183623] page:000000000c9eed03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97af [ 31.184163] memcg:ffff88800cce4e01 [ 31.184376] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.184700] page_type: 0xffffffff() [ 31.184929] raw: 0100000000000200 ffff8880087a0c80 ffffea000037e740 dead000000000002 [ 31.185385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cce4e01 [ 31.185836] page dumped because: kasan: bad access detected [ 31.186165] [ 31.186274] Memory state around the buggy address: [ 31.186562] ffff8880097aef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.187000] ffff8880097aef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.187425] >ffff8880097af000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.187849] ^ [ 31.188321] ffff8880097af080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.188889] ffff8880097af100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.189452] ================================================================== [ 31.190106] Disabling lock debugging due to kernel taint [ 32.963514] BUG: Bad rss-counter state mm:000000007ea8b5e7 type:MM_FILEPAGES val:33 [ 32.964918] BUG: Bad rss-counter state mm:000000007ea8b5e7 type:MM_ANONPAGES val:22 [ 33.438374] BUG: Bad rss-counter state mm:000000002efdb4d0 type:MM_FILEPAGES val:33 [ 33.439549] BUG: Bad rss-counter state mm:000000002efdb4d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11258' (ECDSA) to the list of known hosts. 2023/06/21 06:28:59 fuzzer started 2023/06/21 06:28:59 dialing manager at localhost:36067 2023/06/21 06:28:59 checking machine... 2023/06/21 06:28:59 checking revisions... [ 33.970896] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:28:59 testing simple program... [ 34.015535] cgroup: Unknown subsys name 'net' [ 34.050390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:59 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=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=00007f1b86d1b000 CR3=000000000e318000 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=2039353a38323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a38323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=0000000000000000 RDX=ffff888015bbd1c0 RSI=ffffffff8449991b RDI=0000000000000001 RBP=ffffffff84e3a4e0 RSP=ffff88800f29f9d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800f29fe70 R13=00007f512d344fff R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8135b955 RFL=00000286 [--S--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 00007f512d367900 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=00007f512d346020 CR3=000000001cab0000 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=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