syzkaller login: [ 31.377219] BUG: Bad rss-counter state mm:000000002aea7f3f type:MM_FILEPAGES val:33 [ 31.377800] BUG: Bad rss-counter state mm:000000002aea7f3f type:MM_ANONPAGES val:22 [ 31.553579] ================================================================== [ 31.554165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.554767] Read of size 8 at addr ffff88800e138228 by task sshd/222 [ 31.567481] [ 31.567625] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.568170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.568781] Call Trace: [ 31.568986] [ 31.569168] dump_stack_lvl+0x91/0xf0 [ 31.569487] print_report+0xcc/0x620 [ 31.569799] ? __virt_addr_valid+0x102/0x340 [ 31.570150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.570542] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.570947] kasan_report+0xbe/0xf0 [ 31.571258] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.571652] vma_interval_tree_remove+0xc75/0xec0 [ 31.572035] vma_prepare+0xc54/0x11a0 [ 31.572341] __split_vma+0x5af/0x950 [ 31.572644] ? __pfx___split_vma+0x10/0x10 [ 31.572981] ? find_held_lock+0x2c/0x110 [ 31.573316] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.573675] ? lock_is_held_type+0x9f/0x120 [ 31.574024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.574409] ? mtree_range_walk+0x632/0x900 [ 31.574764] ? mas_walk+0x5c7/0x7c0 [ 31.575099] do_vmi_munmap+0x1f1/0x2b0 [ 31.575413] mmap_region+0x1f9/0x2660 [ 31.575722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.576050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.576505] ? __pfx_lock_acquire+0x10/0x10 [ 31.576844] ? __pfx_mmap_region+0x10/0x10 [ 31.577183] ? security_mmap_addr+0x7d/0xa0 [ 31.577524] ? get_unmapped_area+0x1f5/0x3f0 [ 31.577874] do_mmap+0x854/0xf00 [ 31.578156] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.578473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.578833] ksys_mmap_pgoff+0x3af/0x500 [ 31.579187] do_syscall_64+0x3f/0x90 [ 31.579496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.579916] RIP: 0033:0x7f8a1482fd82 [ 31.580209] 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 [ 31.581547] RSP: 002b:00007ffe151a1a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.582121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a1482fd82 [ 31.582658] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a13c69000 [ 31.583216] RBP: 00007f8a13c69000 R08: 0000000000000009 R09: 0000000000001000 [ 31.583752] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556436b7dec0 [ 31.584287] R13: 00007ffe151a1aa0 R14: 00007ffe151a1ad0 R15: 00007ffe151a1e30 [ 31.584829] [ 31.585016] [ 31.585154] Allocated by task 213: [ 31.585427] kasan_save_stack+0x22/0x50 [ 31.585749] kasan_set_track+0x25/0x30 [ 31.586065] __kasan_slab_alloc+0x59/0x70 [ 31.586400] kmem_cache_alloc+0x16b/0x370 [ 31.586729] vm_area_dup+0x20/0x160 [ 31.587058] __split_vma+0x170/0x950 [ 31.587355] split_vma+0xc6/0x110 [ 31.587635] mprotect_fixup+0x8d2/0xb30 [ 31.587956] do_mprotect_pkey+0x87e/0xd40 [ 31.588289] __x64_sys_mprotect+0x78/0xc0 [ 31.588622] do_syscall_64+0x3f/0x90 [ 31.588926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589335] [ 31.589473] Freed by task 19: [ 31.589717] kasan_save_stack+0x22/0x50 [ 31.590039] kasan_set_track+0x25/0x30 [ 31.590355] kasan_save_free_info+0x2b/0x50 [ 31.590695] __kasan_slab_free+0x10a/0x190 [ 31.591067] kmem_cache_free+0x10d/0x4d0 [ 31.591392] rcu_core+0x8c8/0x2860 [ 31.591677] __do_softirq+0x1b7/0x7d4 [ 31.591985] [ 31.592124] Last potentially related work creation: [ 31.592496] kasan_save_stack+0x22/0x50 [ 31.592818] __kasan_record_aux_stack+0x8e/0xa0 [ 31.593183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.593594] remove_vma+0x139/0x170 [ 31.593881] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.594236] do_vmi_munmap+0x1f1/0x2b0 [ 31.594546] __vm_munmap+0x138/0x3a0 [ 31.594843] __x64_sys_munmap+0x59/0x80 [ 31.599202] do_syscall_64+0x3f/0x90 [ 31.599504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.599909] [ 31.600045] The buggy address belongs to the object at ffff88800e1381d0 [ 31.600045] which belongs to the cache vm_area_struct of size 168 [ 31.600960] The buggy address is located 88 bytes inside of [ 31.600960] freed 168-byte region [ffff88800e1381d0, ffff88800e138278) [ 31.601837] [ 31.601973] The buggy address belongs to the physical page: [ 31.602386] page:00000000124e180f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe138 [ 31.603096] memcg:ffff88800fb9ec01 [ 31.603365] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.603804] page_type: 0xffffffff() [ 31.604089] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b70c0 000000000000000d [ 31.604664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb9ec01 [ 31.605231] page dumped because: kasan: bad access detected [ 31.605645] [ 31.605780] Memory state around the buggy address: [ 31.606144] ffff88800e138100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.606680] ffff88800e138180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.607239] >ffff88800e138200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.607770] ^ [ 31.608118] ffff88800e138280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.608653] ffff88800e138300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.609190] ================================================================== [ 31.610319] Disabling lock debugging due to kernel taint [ 35.734086] BUG: Bad rss-counter state mm:00000000727b9334 type:MM_FILEPAGES val:33 [ 35.734797] BUG: Bad rss-counter state mm:00000000727b9334 type:MM_ANONPAGES val:22 [ 37.196695] BUG: Bad rss-counter state mm:00000000e8dda66e type:MM_FILEPAGES val:33 [ 37.197303] BUG: Bad rss-counter state mm:00000000e8dda66e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57740' (ECDSA) to the list of known hosts. 2023/06/21 10:03:19 fuzzer started 2023/06/21 10:03:20 dialing manager at localhost:36067 2023/06/21 10:03:20 checking machine... 2023/06/21 10:03:20 checking revisions... [ 38.105082] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:03:20 testing simple program... [ 38.146577] cgroup: Unknown subsys name 'net' [ 38.212492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:03:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff110011b3def RSP=ffff888008d9ef70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000094bbd R12=0000000000000246 R13=0000000000000000 R14=ffff88800c45d898 R15=ffff88800c45d850 RIP=ffffffff812e0072 RFL=00000213 [----A-C] 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=00007fa9aa826328 CR3=000000000f0e6000 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=2039313a33303a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a33303a3031203132 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=ffffffff8453684b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008da7bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b4f77 RIP=ffffffff845368c8 RFL=00000002 [-------] 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=00007f40766c8350 CR3=000000000f0e6000 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=2039313a33303a3031203132206e754a XMM01=5d3330333739312e37332020205b203a XMM02=415f4d4d3a6570797420653636616464 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a33303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000