syzkaller login: [ 32.676434] BUG: Bad rss-counter state mm:000000007c46120c type:MM_FILEPAGES val:33 [ 32.678536] BUG: Bad rss-counter state mm:000000007c46120c type:MM_ANONPAGES val:22 [ 32.838438] ================================================================== [ 32.839349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.840270] Read of size 8 at addr ffff888019bb24e0 by task sshd/220 [ 32.841029] [ 32.841319] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.842193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.843175] Call Trace: [ 32.843512] [ 32.843791] dump_stack_lvl+0x91/0xf0 [ 32.844271] print_report+0xcc/0x620 [ 32.844760] ? __virt_addr_valid+0x102/0x340 [ 32.845303] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.845924] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.846546] kasan_report+0xbe/0xf0 [ 32.847050] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.847677] vma_interval_tree_remove+0xc75/0xec0 [ 32.848271] vma_prepare+0xc54/0x11a0 [ 32.848749] __split_vma+0x5af/0x950 [ 32.849219] ? __pfx___split_vma+0x10/0x10 [ 32.849742] ? find_held_lock+0x2c/0x110 [ 32.850255] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.850810] ? lock_is_held_type+0x9f/0x120 [ 32.851357] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.851954] ? mtree_range_walk+0x632/0x900 [ 32.852498] ? mas_walk+0x5c7/0x7c0 [ 32.852966] do_vmi_munmap+0x1f1/0x2b0 [ 32.853452] mmap_region+0x1f9/0x2660 [ 32.853930] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.854442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.855156] ? __pfx_lock_acquire+0x10/0x10 [ 32.855684] ? __pfx_mmap_region+0x10/0x10 [ 32.856207] ? security_mmap_addr+0x7d/0xa0 [ 32.856737] ? get_unmapped_area+0x1f5/0x3f0 [ 32.857280] do_mmap+0x854/0xf00 [ 32.857715] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.858205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.858756] ksys_mmap_pgoff+0x3af/0x500 [ 32.859288] do_syscall_64+0x3f/0x90 [ 32.859757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.860394] RIP: 0033:0x7ff6733a7d82 [ 32.860844] 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 [ 32.862948] RSP: 002b:00007ffddfdb8cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.863846] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6733a7d82 [ 32.864684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6727e1000 [ 32.865518] RBP: 00007ff6727e1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.866350] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b652ddf70 [ 32.867201] R13: 00007ffddfdb8d10 R14: 00007ffddfdb8d40 R15: 00007ffddfdb90a0 [ 32.868048] [ 32.868339] [ 32.868552] Allocated by task 213: [ 32.868970] kasan_save_stack+0x22/0x50 [ 32.869467] kasan_set_track+0x25/0x30 [ 32.869952] __kasan_slab_alloc+0x59/0x70 [ 32.870471] kmem_cache_alloc+0x16b/0x370 [ 32.870996] vm_area_dup+0x20/0x160 [ 32.871451] __split_vma+0x170/0x950 [ 32.871911] split_vma+0xc6/0x110 [ 32.872346] mprotect_fixup+0x8d2/0xb30 [ 32.872845] do_mprotect_pkey+0x87e/0xd40 [ 32.873360] __x64_sys_mprotect+0x78/0xc0 [ 32.873883] do_syscall_64+0x3f/0x90 [ 32.874350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.874995] [ 32.875213] Freed by task 213: [ 32.875597] kasan_save_stack+0x22/0x50 [ 32.876089] kasan_set_track+0x25/0x30 [ 32.876579] kasan_save_free_info+0x2b/0x50 [ 32.877100] __kasan_slab_free+0x10a/0x190 [ 32.877623] kmem_cache_free+0x10d/0x4d0 [ 32.878124] rcu_core+0x8c8/0x2860 [ 32.878563] __do_softirq+0x1b7/0x7d4 [ 32.879049] [ 32.879264] Last potentially related work creation: [ 32.879840] kasan_save_stack+0x22/0x50 [ 32.880336] __kasan_record_aux_stack+0x8e/0xa0 [ 32.880898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.881535] remove_vma+0x139/0x170 [ 32.881985] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.882530] do_vmi_munmap+0x1f1/0x2b0 [ 32.883025] __vm_munmap+0x138/0x3a0 [ 32.883486] __x64_sys_munmap+0x59/0x80 [ 32.883998] do_syscall_64+0x3f/0x90 [ 32.884485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.885129] [ 32.885345] The buggy address belongs to the object at ffff888019bb2488 [ 32.885345] which belongs to the cache vm_area_struct of size 168 [ 32.886800] The buggy address is located 88 bytes inside of [ 32.886800] freed 168-byte region [ffff888019bb2488, ffff888019bb2530) [ 32.888214] [ 32.888430] The buggy address belongs to the physical page: [ 32.889094] page:00000000c89f4f22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bb2 [ 32.890190] memcg:ffff88800ef6b501 [ 32.890612] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.891269] page_type: 0xffffffff() [ 32.891719] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.892646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef6b501 [ 32.893566] page dumped because: kasan: bad access detected [ 32.894228] [ 32.894447] Memory state around the buggy address: [ 32.895035] ffff888019bb2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.895881] ffff888019bb2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.896741] >ffff888019bb2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.897593] ^ [ 32.898351] ffff888019bb2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.899224] ffff888019bb2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.900084] ================================================================== [ 32.901101] Disabling lock debugging due to kernel taint [ 35.770665] BUG: Bad rss-counter state mm:000000004acc59e5 type:MM_FILEPAGES val:33 [ 35.771628] BUG: Bad rss-counter state mm:000000004acc59e5 type:MM_ANONPAGES val:22 [ 36.310674] BUG: Bad rss-counter state mm:00000000ba4e0368 type:MM_FILEPAGES val:33 [ 36.311834] BUG: Bad rss-counter state mm:00000000ba4e0368 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17589' (ECDSA) to the list of known hosts. 2023/06/19 23:22:09 fuzzer started 2023/06/19 23:22:09 dialing manager at localhost:44161 2023/06/19 23:22:09 checking machine... 2023/06/19 23:22:09 checking revisions... [ 36.951409] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:22:09 testing simple program... [ 37.006892] cgroup: Unknown subsys name 'net' [ 37.064273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:22:08 Registers: info registers vcpu 0 RAX=ffff88800dee9248 RBX=ffff88800dba9198 RCX=1ffff11001b7523a RDX=dffffc0000000000 RSI=ffff88800deec0e8 RDI=ffff88800dba91d0 RBP=ffff88800dba91a8 RSP=ffff8880182afa78 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800deec000 R13=0000000000000000 R14=ffff88800eb21178 R15=ffff88800eb21130 RIP=ffffffff8184752d RFL=00000087 [--S--PC] 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 00007f2bd174a900 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=00007ffc325ee000 CR3=00000000194a8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007fb5c8923d60 CR3=0000000014592000 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=e0fa2d720a6722b7034052949d8491e2 XMM02=ec2efd57dc4c00df000000000011d210 XMM03=4930975186ae841a000000000011d2e0 XMM04=a7211ceafaf7055800000000000ae988 XMM05=d4a9f3839b518d900000000000134e60 XMM06=4fda316b135da52b0000000000134288 XMM07=e042d86d42eb936e0000000000124a78 XMM08=4930975186ae841a000000000011d2e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000