syzkaller login: [ 30.683337] BUG: Bad rss-counter state mm:0000000029577528 type:MM_FILEPAGES val:33 [ 30.684559] BUG: Bad rss-counter state mm:0000000029577528 type:MM_ANONPAGES val:22 [ 30.828575] ================================================================== [ 30.829496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.830424] Read of size 8 at addr ffff88800e81d3f8 by task sshd/221 [ 30.831173] [ 30.831389] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.832365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833547] Call Trace: [ 30.833938] [ 30.834278] dump_stack_lvl+0x91/0xf0 [ 30.834870] print_report+0xcc/0x620 [ 30.835433] ? __virt_addr_valid+0x102/0x340 [ 30.836182] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837420] kasan_report+0xbe/0xf0 [ 30.837886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838512] vma_interval_tree_remove+0xc75/0xec0 [ 30.839114] vma_prepare+0xc54/0x11a0 [ 30.839589] __split_vma+0x5af/0x950 [ 30.840100] ? __pfx___split_vma+0x10/0x10 [ 30.840628] ? find_held_lock+0x2c/0x110 [ 30.841160] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.841719] ? lock_is_held_type+0x9f/0x120 [ 30.842266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.842863] ? mtree_range_walk+0x632/0x900 [ 30.843422] ? mas_walk+0x5c7/0x7c0 [ 30.843889] do_vmi_munmap+0x1f1/0x2b0 [ 30.844425] mmap_region+0x1f9/0x2660 [ 30.844903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.845429] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.846143] ? __pfx_lock_acquire+0x10/0x10 [ 30.846669] ? __pfx_mmap_region+0x10/0x10 [ 30.847204] ? security_mmap_addr+0x7d/0xa0 [ 30.847738] ? get_unmapped_area+0x1f5/0x3f0 [ 30.848327] do_mmap+0x854/0xf00 [ 30.848764] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.850022] ksys_mmap_pgoff+0x3af/0x500 [ 30.850614] do_syscall_64+0x3f/0x90 [ 30.851173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851928] RIP: 0033:0x7f0821188d82 [ 30.852476] 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 [ 30.854701] RSP: 002b:00007ffe98fdb188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.855588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0821188d82 [ 30.856450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08205c2000 [ 30.857287] RBP: 00007f08205c2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.858124] R10: 0000000000000812 R11: 0000000000000206 R12: 000055881b3deec0 [ 30.858972] R13: 00007ffe98fdb1a0 R14: 00007ffe98fdb1d0 R15: 00007ffe98fdb530 [ 30.859815] [ 30.860120] [ 30.860334] Allocated by task 214: [ 30.860757] kasan_save_stack+0x22/0x50 [ 30.861256] kasan_set_track+0x25/0x30 [ 30.861745] __kasan_slab_alloc+0x59/0x70 [ 30.862270] kmem_cache_alloc+0x16b/0x370 [ 30.862777] vm_area_dup+0x20/0x160 [ 30.863232] __split_vma+0x170/0x950 [ 30.863688] split_vma+0xc6/0x110 [ 30.864129] mprotect_fixup+0x8d2/0xb30 [ 30.864629] do_mprotect_pkey+0x87e/0xd40 [ 30.865147] __x64_sys_mprotect+0x78/0xc0 [ 30.865668] do_syscall_64+0x3f/0x90 [ 30.866149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866778] [ 30.866989] Freed by task 214: [ 30.867378] kasan_save_stack+0x22/0x50 [ 30.867872] kasan_set_track+0x25/0x30 [ 30.868376] kasan_save_free_info+0x2b/0x50 [ 30.868896] __kasan_slab_free+0x10a/0x190 [ 30.869433] kmem_cache_free+0x10d/0x4d0 [ 30.869936] rcu_core+0x8c8/0x2860 [ 30.870374] __do_softirq+0x1b7/0x7d4 [ 30.870847] [ 30.871060] Last potentially related work creation: [ 30.871634] kasan_save_stack+0x22/0x50 [ 30.872149] __kasan_record_aux_stack+0x8e/0xa0 [ 30.872714] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.873353] remove_vma+0x139/0x170 [ 30.873800] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.874353] do_vmi_munmap+0x1f1/0x2b0 [ 30.874829] __vm_munmap+0x138/0x3a0 [ 30.875302] __x64_sys_munmap+0x59/0x80 [ 30.875789] do_syscall_64+0x3f/0x90 [ 30.876278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876923] [ 30.877140] The buggy address belongs to the object at ffff88800e81d3a0 [ 30.877140] which belongs to the cache vm_area_struct of size 168 [ 30.878587] The buggy address is located 88 bytes inside of [ 30.878587] freed 168-byte region [ffff88800e81d3a0, ffff88800e81d448) [ 30.879974] [ 30.880187] The buggy address belongs to the physical page: [ 30.880834] page:000000006f4c999c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe81d [ 30.881907] memcg:ffff88800e0bbc01 [ 30.882324] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.882961] page_type: 0xffffffff() [ 30.883405] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a0600 dead000000000002 [ 30.884315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0bbc01 [ 30.885199] page dumped because: kasan: bad access detected [ 30.885847] [ 30.886058] Memory state around the buggy address: [ 30.886630] ffff88800e81d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.887470] ffff88800e81d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.888330] >ffff88800e81d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.889171] ^ [ 30.889999] ffff88800e81d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.890837] ffff88800e81d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.891675] ================================================================== [ 30.892798] Disabling lock debugging due to kernel taint [ 32.759776] BUG: Bad rss-counter state mm:000000009e2c2c2b type:MM_FILEPAGES val:33 [ 32.760566] BUG: Bad rss-counter state mm:000000009e2c2c2b type:MM_ANONPAGES val:22 [ 33.202145] BUG: Bad rss-counter state mm:0000000041dd22ab type:MM_FILEPAGES val:33 [ 33.203209] BUG: Bad rss-counter state mm:0000000041dd22ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2103' (ECDSA) to the list of known hosts. 2023/06/21 09:43:01 fuzzer started 2023/06/21 09:43:02 dialing manager at localhost:36067 2023/06/21 09:43:02 checking machine... 2023/06/21 09:43:02 checking revisions... [ 33.950723] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:43:02 testing simple program... [ 34.009953] cgroup: Unknown subsys name 'net' [ 34.071411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001ed2eb8 RSI=ffff88800f697610 RDI=ffff88800f6975c8 RBP=ffff88800844f780 RSP=ffff88800f6974b8 R8 =0000000000000001 R9 =ffff88800f6975b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f6975d8 R13=ffff88800f6975c0 R14=ffff88800f697610 R15=ffff88800f697578 RIP=ffffffff81131c60 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 00007efec3308700 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=00007fdeeead25f0 CR3=0000000016b16000 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=2031303a33343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000052800 RBP=0000000000052800 RSP=ffff888016d57180 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000282 R12=0000000000000000 R13=0000000000000001 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff81798906 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 00007f6a83249900 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=00007f6a83228020 CR3=0000000016794000 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