syzkaller login: [ 30.607771] BUG: Bad rss-counter state mm:00000000a8c7522c type:MM_FILEPAGES val:33 [ 30.609900] BUG: Bad rss-counter state mm:00000000a8c7522c type:MM_ANONPAGES val:22 [ 30.787279] ================================================================== [ 30.788255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.789233] Read of size 8 at addr ffff888017f27058 by task sshd/221 [ 30.790027] [ 30.790247] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.791126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.792125] Call Trace: [ 30.792451] [ 30.792737] dump_stack_lvl+0x91/0xf0 [ 30.793240] print_report+0xcc/0x620 [ 30.793734] ? __virt_addr_valid+0x102/0x340 [ 30.794284] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795001] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795637] kasan_report+0xbe/0xf0 [ 30.796115] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796743] vma_interval_tree_remove+0xc75/0xec0 [ 30.797368] vma_prepare+0xc54/0x11a0 [ 30.797847] __split_vma+0x5af/0x950 [ 30.798316] ? __pfx___split_vma+0x10/0x10 [ 30.798850] ? find_held_lock+0x2c/0x110 [ 30.799387] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.799957] ? lock_is_held_type+0x9f/0x120 [ 30.800507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.801117] ? mtree_range_walk+0x632/0x900 [ 30.801678] ? mas_walk+0x5c7/0x7c0 [ 30.802164] do_vmi_munmap+0x1f1/0x2b0 [ 30.802662] mmap_region+0x1f9/0x2660 [ 30.803156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.803687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.804409] ? __pfx_lock_acquire+0x10/0x10 [ 30.804942] ? __pfx_mmap_region+0x10/0x10 [ 30.805478] ? security_mmap_addr+0x7d/0xa0 [ 30.806319] ? get_unmapped_area+0x1f5/0x3f0 [ 30.807012] do_mmap+0x854/0xf00 [ 30.807573] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.808185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.808883] ksys_mmap_pgoff+0x3af/0x500 [ 30.809519] do_syscall_64+0x3f/0x90 [ 30.810114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810933] RIP: 0033:0x7fadc6712d82 [ 30.811515] 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 [ 30.814136] RSP: 002b:00007ffdf3c70da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.815252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadc6712d82 [ 30.816184] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadc5b4c000 [ 30.817033] RBP: 00007fadc5b4c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.817893] R10: 0000000000000812 R11: 0000000000000206 R12: 000055908cb9eec0 [ 30.818743] R13: 00007ffdf3c70dc0 R14: 00007ffdf3c70df0 R15: 00007ffdf3c71150 [ 30.819608] [ 30.819900] [ 30.820117] Allocated by task 214: [ 30.820543] kasan_save_stack+0x22/0x50 [ 30.821047] kasan_set_track+0x25/0x30 [ 30.821542] __kasan_slab_alloc+0x59/0x70 [ 30.822066] kmem_cache_alloc+0x16b/0x370 [ 30.822589] vm_area_dup+0x20/0x160 [ 30.823044] __split_vma+0x170/0x950 [ 30.823518] split_vma+0xc6/0x110 [ 30.823954] mprotect_fixup+0x8d2/0xb30 [ 30.824454] do_mprotect_pkey+0x87e/0xd40 [ 30.824975] __x64_sys_mprotect+0x78/0xc0 [ 30.825496] do_syscall_64+0x3f/0x90 [ 30.825973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826615] [ 30.826831] Freed by task 214: [ 30.827222] kasan_save_stack+0x22/0x50 [ 30.827743] kasan_set_track+0x25/0x30 [ 30.828243] kasan_save_free_info+0x2b/0x50 [ 30.828782] __kasan_slab_free+0x10a/0x190 [ 30.829317] kmem_cache_free+0x10d/0x4d0 [ 30.829832] rcu_core+0x8c8/0x2860 [ 30.830276] __do_softirq+0x1b7/0x7d4 [ 30.830761] [ 30.830977] Last potentially related work creation: [ 30.831574] kasan_save_stack+0x22/0x50 [ 30.832084] __kasan_record_aux_stack+0x8e/0xa0 [ 30.832658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833298] remove_vma+0x139/0x170 [ 30.833757] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.834315] do_vmi_munmap+0x1f1/0x2b0 [ 30.834804] __vm_munmap+0x138/0x3a0 [ 30.835275] __x64_sys_munmap+0x59/0x80 [ 30.835794] do_syscall_64+0x3f/0x90 [ 30.836270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.836916] [ 30.837133] The buggy address belongs to the object at ffff888017f27000 [ 30.837133] which belongs to the cache vm_area_struct of size 168 [ 30.838605] The buggy address is located 88 bytes inside of [ 30.838605] freed 168-byte region [ffff888017f27000, ffff888017f270a8) [ 30.840024] [ 30.840241] The buggy address belongs to the physical page: [ 30.840895] page:0000000010d58091 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f27 [ 30.841987] memcg:ffff88800e39b201 [ 30.842413] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.843055] page_type: 0xffffffff() [ 30.843514] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.844431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e39b201 [ 30.845345] page dumped because: kasan: bad access detected [ 30.846013] [ 30.846234] Memory state around the buggy address: [ 30.846824] ffff888017f26f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.847708] ffff888017f26f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.848568] >ffff888017f27000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.849424] ^ [ 30.850160] ffff888017f27080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.851017] ffff888017f27100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.851889] ================================================================== [ 30.853102] Disabling lock debugging due to kernel taint [ 32.815176] BUG: Bad rss-counter state mm:00000000748692da type:MM_FILEPAGES val:33 [ 32.816222] BUG: Bad rss-counter state mm:00000000748692da type:MM_ANONPAGES val:22 [ 33.280756] BUG: Bad rss-counter state mm:0000000086203e36 type:MM_FILEPAGES val:33 [ 33.281934] BUG: Bad rss-counter state mm:0000000086203e36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59738' (ECDSA) to the list of known hosts. 2023/06/21 03:28:45 fuzzer started 2023/06/21 03:28:45 dialing manager at localhost:36067 2023/06/21 03:28:45 checking machine... 2023/06/21 03:28:45 checking revisions... [ 34.018955] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:28:45 testing simple program... [ 34.072037] cgroup: Unknown subsys name 'net' [ 34.124484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:28:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8186bf8c RCX=ffffffff864bce01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8186bf8c RBP=ffffffff8186bf8c RSP=ffff88806ce09a40 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018ec0000 R15=ffff88800d829410 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007f2d63185900 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=00007f2d6373a650 CR3=0000000016840000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000556264537d44 CR3=0000000005482000 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=00007f9a95591510000055909b09f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000