syzkaller login: [ 30.774552] BUG: Bad rss-counter state mm:000000002c95dddb type:MM_FILEPAGES val:33 [ 30.775770] BUG: Bad rss-counter state mm:000000002c95dddb type:MM_ANONPAGES val:22 [ 30.810328] ================================================================== [ 30.811698] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813119] Read of size 8 at addr ffff88801ae244e0 by task sshd/219 [ 30.814182] [ 30.814521] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.817173] Call Trace: [ 30.817598] [ 30.818021] dump_stack_lvl+0x91/0xf0 [ 30.818723] print_report+0xcc/0x620 [ 30.819421] ? __virt_addr_valid+0x102/0x340 [ 30.820191] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821033] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821961] kasan_report+0xbe/0xf0 [ 30.822525] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823268] vma_interval_tree_remove+0xc75/0xec0 [ 30.823987] vma_prepare+0xc54/0x11a0 [ 30.824567] __split_vma+0x5af/0x950 [ 30.825132] ? __pfx___split_vma+0x10/0x10 [ 30.825678] ? find_held_lock+0x2c/0x110 [ 30.826175] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.826716] ? lock_is_held_type+0x9f/0x120 [ 30.827227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.827809] ? mtree_range_walk+0x632/0x900 [ 30.828341] ? mas_walk+0x5c7/0x7c0 [ 30.828806] do_vmi_munmap+0x1f1/0x2b0 [ 30.829275] mmap_region+0x1f9/0x2660 [ 30.829733] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.830218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.830905] ? __pfx_lock_acquire+0x10/0x10 [ 30.831403] ? __pfx_mmap_region+0x10/0x10 [ 30.831905] ? security_mmap_addr+0x7d/0xa0 [ 30.832403] ? get_unmapped_area+0x1f5/0x3f0 [ 30.832943] do_mmap+0x854/0xf00 [ 30.833358] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.833829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.834363] ksys_mmap_pgoff+0x3af/0x500 [ 30.834841] do_syscall_64+0x3f/0x90 [ 30.835292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835905] RIP: 0033:0x7f4005a20d82 [ 30.836334] 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 [ 30.838339] RSP: 002b:00007ffc6db01bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.839475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4005a20d82 [ 30.840277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4004e5a000 [ 30.841094] RBP: 00007f4004e5a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.841890] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be6ab33ec0 [ 30.842692] R13: 00007ffc6db01bd0 R14: 00007ffc6db01c00 R15: 00007ffc6db01f60 [ 30.843512] [ 30.843794] [ 30.843998] Allocated by task 212: [ 30.844405] kasan_save_stack+0x22/0x50 [ 30.844950] kasan_set_track+0x25/0x30 [ 30.845529] __kasan_slab_alloc+0x59/0x70 [ 30.846144] kmem_cache_alloc+0x16b/0x370 [ 30.846753] vm_area_dup+0x20/0x160 [ 30.847285] __split_vma+0x170/0x950 [ 30.847836] split_vma+0xc6/0x110 [ 30.848351] mprotect_fixup+0x8d2/0xb30 [ 30.848952] do_mprotect_pkey+0x87e/0xd40 [ 30.849569] __x64_sys_mprotect+0x78/0xc0 [ 30.850181] do_syscall_64+0x3f/0x90 [ 30.850740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851496] [ 30.851749] Freed by task 212: [ 30.852209] kasan_save_stack+0x22/0x50 [ 30.852819] kasan_set_track+0x25/0x30 [ 30.853397] kasan_save_free_info+0x2b/0x50 [ 30.854024] __kasan_slab_free+0x10a/0x190 [ 30.854650] kmem_cache_free+0x10d/0x4d0 [ 30.855245] rcu_core+0x8c8/0x2860 [ 30.855767] __do_softirq+0x1b7/0x7d4 [ 30.856326] [ 30.856589] Last potentially related work creation: [ 30.857275] kasan_save_stack+0x22/0x50 [ 30.857865] __kasan_record_aux_stack+0x8e/0xa0 [ 30.858540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.859299] remove_vma+0x139/0x170 [ 30.859831] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.860491] do_vmi_munmap+0x1f1/0x2b0 [ 30.861065] __vm_munmap+0x138/0x3a0 [ 30.861614] __x64_sys_munmap+0x59/0x80 [ 30.862200] do_syscall_64+0x3f/0x90 [ 30.862760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863515] [ 30.863767] The buggy address belongs to the object at ffff88801ae24488 [ 30.863767] which belongs to the cache vm_area_struct of size 168 [ 30.865512] The buggy address is located 88 bytes inside of [ 30.865512] freed 168-byte region [ffff88801ae24488, ffff88801ae24530) [ 30.867165] [ 30.867416] The buggy address belongs to the physical page: [ 30.868194] page:00000000412b36a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ae24 [ 30.869575] memcg:ffff88801ae25001 [ 30.870119] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.870887] page_type: 0xffffffff() [ 30.871420] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.872539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ae25001 [ 30.873621] page dumped because: kasan: bad access detected [ 30.874401] [ 30.874656] Memory state around the buggy address: [ 30.875343] ffff88801ae24380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.876354] ffff88801ae24400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.877382] >ffff88801ae24480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.878391] ^ [ 30.879287] ffff88801ae24500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.880306] ffff88801ae24580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.881428] ================================================================== [ 30.882546] Disabling lock debugging due to kernel taint [ 32.414422] BUG: Bad rss-counter state mm:0000000082483bfb type:MM_FILEPAGES val:33 [ 32.414982] BUG: Bad rss-counter state mm:0000000082483bfb type:MM_ANONPAGES val:22 [ 32.811570] BUG: Bad rss-counter state mm:0000000011f718d7 type:MM_FILEPAGES val:33 [ 32.812497] BUG: Bad rss-counter state mm:0000000011f718d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51114' (ECDSA) to the list of known hosts. 2023/06/20 12:21:05 fuzzer started 2023/06/20 12:21:05 dialing manager at localhost:36067 2023/06/20 12:21:05 checking machine... 2023/06/20 12:21:05 checking revisions... [ 33.482404] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:21:05 testing simple program... [ 33.527819] cgroup: Unknown subsys name 'net' [ 33.568951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:21:05 Registers: info registers vcpu 0 RAX=ffffffff81745be9 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110033d4da6 RSI=ffffffff81745be9 RDI=ffff888019ea6da0 RBP=ffff888019ea6d70 RSP=ffff888019ea6cd0 R8 =0000000000000001 R9 =ffff888019ea6d18 R10=0000000000038001 R11=000000000001e471 R12=ffff888019ea6da0 R13=0000000000000000 R14=ffff8880189e3680 R15=ffff888019ea71f8 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007fe309cc7900 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=00007fe309c91008 CR3=000000000e858000 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=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 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff860ae4d2 RDX=0000000000000008 RSI=ffff888008e37f50 RDI=ffff888008e37950 RBP=ffff888008e379a8 RSP=ffff888008e378d8 R8 =ffffffff860ae4d6 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37f58 R15=ffff888008e37950 RIP=ffffffff811303f0 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 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=00007f39a29f4110 CR3=0000000019c34000 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=2034303a31323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000