syzkaller login: [ 58.998006] BUG: Bad rss-counter state mm:00000000922e32dc type:MM_FILEPAGES val:33 [ 58.999224] BUG: Bad rss-counter state mm:00000000922e32dc type:MM_ANONPAGES val:22 [ 59.161465] ================================================================== [ 59.162406] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.163345] Read of size 8 at addr ffff88800e058310 by task sshd/221 [ 59.164121] [ 59.164339] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.165322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.166291] Call Trace: [ 59.166607] [ 59.166904] dump_stack_lvl+0x91/0xf0 [ 59.167392] print_report+0xcc/0x620 [ 59.167885] ? __virt_addr_valid+0x102/0x340 [ 59.168433] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.169046] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.169661] kasan_report+0xbe/0xf0 [ 59.170150] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.170778] vma_interval_tree_remove+0xc75/0xec0 [ 59.171376] vma_prepare+0xc54/0x11a0 [ 59.171852] __split_vma+0x5af/0x950 [ 59.172332] ? __pfx___split_vma+0x10/0x10 [ 59.172855] ? find_held_lock+0x2c/0x110 [ 59.173379] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.173953] ? lock_is_held_type+0x9f/0x120 [ 59.174507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.175112] ? mtree_range_walk+0x632/0x900 [ 59.175659] ? mas_walk+0x5c7/0x7c0 [ 59.176144] do_vmi_munmap+0x1f1/0x2b0 [ 59.176651] mmap_region+0x1f9/0x2660 [ 59.177135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.177654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.178379] ? __pfx_lock_acquire+0x10/0x10 [ 59.178915] ? __pfx_mmap_region+0x10/0x10 [ 59.179450] ? security_mmap_addr+0x7d/0xa0 [ 59.179987] ? get_unmapped_area+0x1f5/0x3f0 [ 59.180541] do_mmap+0x854/0xf00 [ 59.180983] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.181473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.182054] ksys_mmap_pgoff+0x3af/0x500 [ 59.182564] do_syscall_64+0x3f/0x90 [ 59.183047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.183695] RIP: 0033:0x7f41c06a0d82 [ 59.184153] 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 [ 59.186278] RSP: 002b:00007fff81e47598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.187192] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41c06a0d82 [ 59.188042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41bfada000 [ 59.188886] RBP: 00007f41bfada000 R08: 0000000000000009 R09: 0000000000001000 [ 59.189733] R10: 0000000000000812 R11: 0000000000000206 R12: 000056489e073f70 [ 59.190608] R13: 00007fff81e475b0 R14: 00007fff81e475e0 R15: 00007fff81e47940 [ 59.191467] [ 59.191759] [ 59.191975] Allocated by task 214: [ 59.192422] kasan_save_stack+0x22/0x50 [ 59.192947] kasan_set_track+0x25/0x30 [ 59.193436] __kasan_slab_alloc+0x59/0x70 [ 59.193972] kmem_cache_alloc+0x16b/0x370 [ 59.194482] vm_area_dup+0x20/0x160 [ 59.194943] __split_vma+0x170/0x950 [ 59.195410] split_vma+0xc6/0x110 [ 59.195850] mprotect_fixup+0x8d2/0xb30 [ 59.196364] do_mprotect_pkey+0x87e/0xd40 [ 59.196884] __x64_sys_mprotect+0x78/0xc0 [ 59.197407] do_syscall_64+0x3f/0x90 [ 59.197901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.198549] [ 59.198761] Freed by task 214: [ 59.199154] kasan_save_stack+0x22/0x50 [ 59.199662] kasan_set_track+0x25/0x30 [ 59.200163] kasan_save_free_info+0x2b/0x50 [ 59.200695] __kasan_slab_free+0x10a/0x190 [ 59.201224] kmem_cache_free+0x10d/0x4d0 [ 59.201736] rcu_core+0x8c8/0x2860 [ 59.202197] __do_softirq+0x1b7/0x7d4 [ 59.202679] [ 59.202895] Last potentially related work creation: [ 59.203482] kasan_save_stack+0x22/0x50 [ 59.203993] __kasan_record_aux_stack+0x8e/0xa0 [ 59.204572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.205230] remove_vma+0x139/0x170 [ 59.205683] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.206266] do_vmi_munmap+0x1f1/0x2b0 [ 59.206756] __vm_munmap+0x138/0x3a0 [ 59.207226] __x64_sys_munmap+0x59/0x80 [ 59.207725] do_syscall_64+0x3f/0x90 [ 59.208206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.208844] [ 59.209065] The buggy address belongs to the object at ffff88800e0582b8 [ 59.209065] which belongs to the cache vm_area_struct of size 168 [ 59.210565] The buggy address is located 88 bytes inside of [ 59.210565] freed 168-byte region [ffff88800e0582b8, ffff88800e058360) [ 59.211988] [ 59.212206] The buggy address belongs to the physical page: [ 59.212864] page:000000000c920c2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe058 [ 59.213978] memcg:ffff88800ec5ca01 [ 59.214411] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.215057] page_type: 0xffffffff() [ 59.215509] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 59.216432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec5ca01 [ 59.217332] page dumped because: kasan: bad access detected [ 59.218002] [ 59.218224] Memory state around the buggy address: [ 59.218806] ffff88800e058200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 59.219667] ffff88800e058280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 59.220521] >ffff88800e058300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 59.221370] ^ [ 59.221846] ffff88800e058380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 59.222783] ffff88800e058400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 59.223688] ================================================================== [ 59.224716] Disabling lock debugging due to kernel taint [ 60.964897] BUG: Bad rss-counter state mm:000000004c3c1845 type:MM_FILEPAGES val:33 [ 60.966027] BUG: Bad rss-counter state mm:000000004c3c1845 type:MM_ANONPAGES val:22 [ 61.375688] BUG: Bad rss-counter state mm:00000000378dff2f type:MM_FILEPAGES val:33 [ 61.376494] BUG: Bad rss-counter state mm:00000000378dff2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14223' (ECDSA) to the list of known hosts. 2023/06/20 22:00:43 fuzzer started 2023/06/20 22:00:43 dialing manager at localhost:36067 2023/06/20 22:00:43 checking machine... 2023/06/20 22:00:43 checking revisions... [ 62.037572] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:00:43 testing simple program... [ 62.089619] cgroup: Unknown subsys name 'net' [ 62.152114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:00:43 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=00007fff56bdb6d0 RCX=0000000000000000 RDX=ffff88801668b680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888016bd7d18 RSP=ffff888016bd7ae0 R8 =0000000000000007 R9 =0000000000000000 R10=00007fff56bdb6d0 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000001000 R15=dffffc0000000000 RIP=ffffffff814c0404 RFL=00040246 [---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 00007fea31830900 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=00007fea31de7618 CR3=000000000e90c000 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=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 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=0000000000000001 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=00007fa59ae64650 CR3=0000000015f5a000 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=2032343a30303a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000