syzkaller login: [ 36.645169] BUG: Bad rss-counter state mm:000000002787be49 type:MM_FILEPAGES val:33 [ 36.646475] BUG: Bad rss-counter state mm:000000002787be49 type:MM_ANONPAGES val:22 [ 36.821989] ================================================================== [ 36.823082] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.824343] Read of size 8 at addr ffff888016d70140 by task sshd/220 [ 36.825273] [ 36.825533] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.826553] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.827556] Call Trace: [ 36.827876] [ 36.828168] dump_stack_lvl+0x91/0xf0 [ 36.828693] print_report+0xcc/0x620 [ 36.829184] ? __virt_addr_valid+0x102/0x340 [ 36.829746] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.830364] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.830988] kasan_report+0xbe/0xf0 [ 36.831473] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.832134] vma_interval_tree_remove+0xc75/0xec0 [ 36.832755] vma_prepare+0xc54/0x11a0 [ 36.833237] __split_vma+0x5af/0x950 [ 36.833709] ? __pfx___split_vma+0x10/0x10 [ 36.834242] ? find_held_lock+0x2c/0x110 [ 36.834770] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.835345] ? lock_is_held_type+0x9f/0x120 [ 36.835944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.836712] ? mtree_range_walk+0x632/0x900 [ 36.837382] ? mas_walk+0x5c7/0x7c0 [ 36.837957] do_vmi_munmap+0x1f1/0x2b0 [ 36.838549] mmap_region+0x1f9/0x2660 [ 36.839132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.839749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.840640] ? __pfx_lock_acquire+0x10/0x10 [ 36.841280] ? __pfx_mmap_region+0x10/0x10 [ 36.841921] ? security_mmap_addr+0x7d/0xa0 [ 36.842559] ? get_unmapped_area+0x1f5/0x3f0 [ 36.843239] do_mmap+0x854/0xf00 [ 36.843770] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.844362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.845043] ksys_mmap_pgoff+0x3af/0x500 [ 36.845658] do_syscall_64+0x3f/0x90 [ 36.846228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.847000] RIP: 0033:0x7f346a6f3d82 [ 36.847546] 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 [ 36.850123] RSP: 002b:00007ffe6d2993c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.851211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f346a6f3d82 [ 36.852243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3469b2d000 [ 36.853270] RBP: 00007f3469b2d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.854285] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564642e3d90 [ 36.855136] R13: 00007ffe6d2993e0 R14: 00007ffe6d299410 R15: 00007ffe6d299770 [ 36.855955] [ 36.856233] [ 36.856438] Allocated by task 213: [ 36.856873] kasan_save_stack+0x22/0x50 [ 36.857358] kasan_set_track+0x25/0x30 [ 36.857826] __kasan_slab_alloc+0x59/0x70 [ 36.858320] kmem_cache_alloc+0x16b/0x370 [ 36.858806] vm_area_dup+0x20/0x160 [ 36.859237] __split_vma+0x170/0x950 [ 36.859677] split_vma+0xc6/0x110 [ 36.860097] mprotect_fixup+0x8d2/0xb30 [ 36.860578] do_mprotect_pkey+0x87e/0xd40 [ 36.861078] __x64_sys_mprotect+0x78/0xc0 [ 36.861567] do_syscall_64+0x3f/0x90 [ 36.862018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.862625] [ 36.862831] Freed by task 213: [ 36.863203] kasan_save_stack+0x22/0x50 [ 36.863676] kasan_set_track+0x25/0x30 [ 36.864151] kasan_save_free_info+0x2b/0x50 [ 36.864670] __kasan_slab_free+0x10a/0x190 [ 36.865272] kmem_cache_free+0x10d/0x4d0 [ 36.865778] rcu_core+0x8c8/0x2860 [ 36.866213] __do_softirq+0x1b7/0x7d4 [ 36.866684] [ 36.866899] Last potentially related work creation: [ 36.867477] kasan_save_stack+0x22/0x50 [ 36.867975] __kasan_record_aux_stack+0x8e/0xa0 [ 36.868540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.869191] remove_vma+0x139/0x170 [ 36.869640] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.870189] do_vmi_munmap+0x1f1/0x2b0 [ 36.870666] __vm_munmap+0x138/0x3a0 [ 36.871133] __x64_sys_munmap+0x59/0x80 [ 36.871626] do_syscall_64+0x3f/0x90 [ 36.872092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.872734] [ 36.872951] The buggy address belongs to the object at ffff888016d700e8 [ 36.872951] which belongs to the cache vm_area_struct of size 168 [ 36.874380] The buggy address is located 88 bytes inside of [ 36.874380] freed 168-byte region [ffff888016d700e8, ffff888016d70190) [ 36.875753] [ 36.875980] The buggy address belongs to the physical page: [ 36.876801] page:000000007a28b05e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d70 [ 36.877873] memcg:ffff88800ecceb01 [ 36.878295] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.878920] page_type: 0xffffffff() [ 36.879361] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.880259] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecceb01 [ 36.881157] page dumped because: kasan: bad access detected [ 36.881803] [ 36.882017] Memory state around the buggy address: [ 36.882583] ffff888016d70000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.883416] ffff888016d70080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.884249] >ffff888016d70100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.885091] ^ [ 36.885703] ffff888016d70180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.886537] ffff888016d70200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.887366] ================================================================== [ 36.888280] Disabling lock debugging due to kernel taint [ 39.192803] BUG: Bad rss-counter state mm:00000000710e2135 type:MM_FILEPAGES val:33 [ 39.194301] BUG: Bad rss-counter state mm:00000000710e2135 type:MM_ANONPAGES val:22 [ 39.653815] BUG: Bad rss-counter state mm:0000000081fcd6c6 type:MM_FILEPAGES val:33 [ 39.654978] BUG: Bad rss-counter state mm:0000000081fcd6c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49473' (ECDSA) to the list of known hosts. 2023/06/20 05:56:01 fuzzer started 2023/06/20 05:56:02 dialing manager at localhost:44161 2023/06/20 05:56:02 checking machine... 2023/06/20 05:56:02 checking revisions... [ 40.401385] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:02 testing simple program... [ 40.452373] cgroup: Unknown subsys name 'net' [ 40.511567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:55:55 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016b97901 RSI=ffff888016b97968 RDI=ffff888016b97968 RBP=ffff88806ce09a98 RSP=ffff88806ce099c8 R8 =ffffffff86088c1e R9 =ffff88806ce09a80 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09aa0 R13=ffff88806ce09a88 R14=ffff888016b97970 R15=ffff88806ce09a40 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f119a73f900 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=00007f119acf4650 CR3=000000000e046000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=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=00007ffd33d4a548 CR3=0000000009884000 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=2031303a36353a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000