syzkaller login: [ 38.777476] BUG: Bad rss-counter state mm:000000008bee9f78 type:MM_FILEPAGES val:33 [ 38.778555] BUG: Bad rss-counter state mm:000000008bee9f78 type:MM_ANONPAGES val:22 [ 38.908006] ================================================================== [ 38.908921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.909850] Read of size 8 at addr ffff88800e698228 by task sshd/218 [ 38.910632] [ 38.910862] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.911860] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.912853] Call Trace: [ 38.913178] [ 38.913469] dump_stack_lvl+0x91/0xf0 [ 38.913962] print_report+0xcc/0x620 [ 38.914451] ? __virt_addr_valid+0x102/0x340 [ 38.915050] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915677] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916298] kasan_report+0xbe/0xf0 [ 38.916777] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917407] vma_interval_tree_remove+0xc75/0xec0 [ 38.918010] vma_prepare+0xc54/0x11a0 [ 38.918491] __split_vma+0x5af/0x950 [ 38.918978] ? __pfx___split_vma+0x10/0x10 [ 38.919507] ? find_held_lock+0x2c/0x110 [ 38.920031] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.920596] ? lock_is_held_type+0x9f/0x120 [ 38.921138] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.921745] ? mtree_range_walk+0x632/0x900 [ 38.922294] ? mas_walk+0x5c7/0x7c0 [ 38.922779] do_vmi_munmap+0x1f1/0x2b0 [ 38.923311] mmap_region+0x1f9/0x2660 [ 38.923800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.924311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925024] ? __pfx_lock_acquire+0x10/0x10 [ 38.925556] ? __pfx_mmap_region+0x10/0x10 [ 38.926087] ? security_mmap_addr+0x7d/0xa0 [ 38.926622] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927201] do_mmap+0x854/0xf00 [ 38.927645] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.928139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.928706] ksys_mmap_pgoff+0x3af/0x500 [ 38.929216] do_syscall_64+0x3f/0x90 [ 38.929704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930361] RIP: 0033:0x7fbfca1f5d82 [ 38.930829] 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 [ 38.932989] RSP: 002b:00007ffc8dae3b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.933915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfca1f5d82 [ 38.934776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfc962f000 [ 38.935645] RBP: 00007fbfc962f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.936492] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e71e37ad90 [ 38.937343] R13: 00007ffc8dae3b40 R14: 00007ffc8dae3b70 R15: 00007ffc8dae3ed0 [ 38.938203] [ 38.938501] [ 38.938719] Allocated by task 211: [ 38.939161] kasan_save_stack+0x22/0x50 [ 38.939665] kasan_set_track+0x25/0x30 [ 38.940162] __kasan_slab_alloc+0x59/0x70 [ 38.940689] kmem_cache_alloc+0x16b/0x370 [ 38.941210] vm_area_dup+0x20/0x160 [ 38.941663] __split_vma+0x170/0x950 [ 38.942130] split_vma+0xc6/0x110 [ 38.942568] mprotect_fixup+0x8d2/0xb30 [ 38.943091] do_mprotect_pkey+0x87e/0xd40 [ 38.943611] __x64_sys_mprotect+0x78/0xc0 [ 38.944133] do_syscall_64+0x3f/0x90 [ 38.944608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945257] [ 38.945481] Freed by task 211: [ 38.945885] kasan_save_stack+0x22/0x50 [ 38.946397] kasan_set_track+0x25/0x30 [ 38.946899] kasan_save_free_info+0x2b/0x50 [ 38.947436] __kasan_slab_free+0x10a/0x190 [ 38.947983] kmem_cache_free+0x10d/0x4d0 [ 38.948499] rcu_core+0x8c8/0x2860 [ 38.948944] __do_softirq+0x1b7/0x7d4 [ 38.949432] [ 38.949655] Last potentially related work creation: [ 38.950243] kasan_save_stack+0x22/0x50 [ 38.950755] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952025] remove_vma+0x139/0x170 [ 38.952481] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953042] do_vmi_munmap+0x1f1/0x2b0 [ 38.953536] __vm_munmap+0x138/0x3a0 [ 38.954045] __x64_sys_munmap+0x59/0x80 [ 38.954556] do_syscall_64+0x3f/0x90 [ 38.955048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955703] [ 38.955924] Second to last potentially related work creation: [ 38.956627] kasan_save_stack+0x22/0x50 [ 38.957130] __kasan_record_aux_stack+0x8e/0xa0 [ 38.957708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.958355] remove_vma+0x139/0x170 [ 38.958809] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.959380] do_vmi_munmap+0x1f1/0x2b0 [ 38.959865] mmap_region+0x1f9/0x2660 [ 38.960346] do_mmap+0x854/0xf00 [ 38.960786] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.961276] ksys_mmap_pgoff+0x3af/0x500 [ 38.961784] do_syscall_64+0x3f/0x90 [ 38.962263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962931] [ 38.963153] The buggy address belongs to the object at ffff88800e6981d0 [ 38.963153] which belongs to the cache vm_area_struct of size 168 [ 38.964633] The buggy address is located 88 bytes inside of [ 38.964633] freed 168-byte region [ffff88800e6981d0, ffff88800e698278) [ 38.966025] [ 38.966245] The buggy address belongs to the physical page: [ 38.966914] page:00000000f0089ab7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe698 [ 38.968002] memcg:ffff88800ebdf701 [ 38.968430] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.969127] page_type: 0xffffffff() [ 38.969576] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329fc0 dead000000000005 [ 38.970493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebdf701 [ 38.971422] page dumped because: kasan: bad access detected [ 38.972085] [ 38.972303] Memory state around the buggy address: [ 38.972876] ffff88800e698100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.973727] ffff88800e698180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.974586] >ffff88800e698200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.975440] ^ [ 38.976001] ffff88800e698280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.976850] ffff88800e698300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.977706] ================================================================== [ 38.978846] Disabling lock debugging due to kernel taint [ 40.859681] BUG: Bad rss-counter state mm:00000000867f634b type:MM_FILEPAGES val:33 [ 40.860588] BUG: Bad rss-counter state mm:00000000867f634b type:MM_ANONPAGES val:22 [ 41.275530] BUG: Bad rss-counter state mm:000000009e58c706 type:MM_FILEPAGES val:33 [ 41.276745] BUG: Bad rss-counter state mm:000000009e58c706 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34448' (ECDSA) to the list of known hosts. 2023/06/20 22:16:55 fuzzer started 2023/06/20 22:16:55 dialing manager at localhost:36067 2023/06/20 22:16:55 checking machine... 2023/06/20 22:16:55 checking revisions... [ 41.976814] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:16:55 testing simple program... [ 42.030519] cgroup: Unknown subsys name 'net' [ 42.068544] cgroup: Unknown subsys name 'rlimit' executing program executing program [ 49.777782] BUG: Bad rss-counter state mm:00000000785e6931 type:MM_FILEPAGES val:181 [ 49.779066] BUG: Bad rss-counter state mm:00000000785e6931 type:MM_ANONPAGES val:50 executing program VM DIAGNOSIS: 22:16:54 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff816688cc RDX=ffff888018d7d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea00005e7940 RSP=ffff888016d87908 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888016fc20e8 R13=00007f8183799000 R14=ffff8880146a5cc0 R15=dffffc0000000000 RIP=ffffffff814c086b 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 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=00007f8183404328 CR3=000000000edb8000 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=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=00007fbe2ebfb330 CR3=0000000014604000 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=2034353a36313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36313a3232203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000