syzkaller login: [ 35.313954] BUG: Bad rss-counter state mm:000000003433ca4f type:MM_FILEPAGES val:33 [ 35.315191] BUG: Bad rss-counter state mm:000000003433ca4f type:MM_ANONPAGES val:22 [ 35.354884] ================================================================== [ 35.355895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.356768] Read of size 8 at addr ffff88800e656ed8 by task sshd/219 [ 35.357494] [ 35.357701] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.358505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.359419] Call Trace: [ 35.359721] [ 35.359990] dump_stack_lvl+0x91/0xf0 [ 35.360452] print_report+0xcc/0x620 [ 35.360906] ? __virt_addr_valid+0x102/0x340 [ 35.361422] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.361996] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.362575] kasan_report+0xbe/0xf0 [ 35.363021] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.363615] vma_interval_tree_remove+0xc75/0xec0 [ 35.364187] vma_prepare+0xc54/0x11a0 [ 35.364637] __split_vma+0x5af/0x950 [ 35.365082] ? __pfx___split_vma+0x10/0x10 [ 35.365578] ? find_held_lock+0x2c/0x110 [ 35.366071] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.366611] ? lock_is_held_type+0x9f/0x120 [ 35.367127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.367717] ? mtree_range_walk+0x632/0x900 [ 35.368234] ? mas_walk+0x5c7/0x7c0 [ 35.368679] do_vmi_munmap+0x1f1/0x2b0 [ 35.369140] mmap_region+0x1f9/0x2660 [ 35.369593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.370073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.370739] ? __pfx_lock_acquire+0x10/0x10 [ 35.371240] ? __pfx_mmap_region+0x10/0x10 [ 35.371745] ? security_mmap_addr+0x7d/0xa0 [ 35.372243] ? get_unmapped_area+0x1f5/0x3f0 [ 35.372755] do_mmap+0x854/0xf00 [ 35.373174] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.373639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.374171] ksys_mmap_pgoff+0x3af/0x500 [ 35.374644] do_syscall_64+0x3f/0x90 [ 35.375099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.375708] RIP: 0033:0x7f88ea9a7d82 [ 35.376142] 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 [ 35.378256] RSP: 002b:00007ffe41c1e178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.379102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88ea9a7d82 [ 35.379905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88e9de1000 [ 35.380696] RBP: 00007f88e9de1000 R08: 0000000000000009 R09: 0000000000001000 [ 35.381497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558767f41ec0 [ 35.382284] R13: 00007ffe41c1e190 R14: 00007ffe41c1e1c0 R15: 00007ffe41c1e520 [ 35.383088] [ 35.383363] [ 35.383575] Allocated by task 212: [ 35.383977] kasan_save_stack+0x22/0x50 [ 35.384448] kasan_set_track+0x25/0x30 [ 35.384912] __kasan_slab_alloc+0x59/0x70 [ 35.385401] kmem_cache_alloc+0x16b/0x370 [ 35.385886] vm_area_dup+0x20/0x160 [ 35.386311] __split_vma+0x170/0x950 [ 35.386752] split_vma+0xc6/0x110 [ 35.387164] mprotect_fixup+0x8d2/0xb30 [ 35.387649] do_mprotect_pkey+0x87e/0xd40 [ 35.388137] __x64_sys_mprotect+0x78/0xc0 [ 35.388625] do_syscall_64+0x3f/0x90 [ 35.389070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.389673] [ 35.389881] Freed by task 212: [ 35.390252] kasan_save_stack+0x22/0x50 [ 35.390726] kasan_set_track+0x25/0x30 [ 35.391193] kasan_save_free_info+0x2b/0x50 [ 35.391710] __kasan_slab_free+0x10a/0x190 [ 35.392214] kmem_cache_free+0x10d/0x4d0 [ 35.392692] rcu_core+0x8c8/0x2860 [ 35.393112] __do_softirq+0x1b7/0x7d4 [ 35.393556] [ 35.393760] Last potentially related work creation: [ 35.394309] kasan_save_stack+0x22/0x50 [ 35.394780] __kasan_record_aux_stack+0x8e/0xa0 [ 35.395322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.395930] remove_vma+0x139/0x170 [ 35.396358] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.396888] do_vmi_munmap+0x1f1/0x2b0 [ 35.397349] __vm_munmap+0x138/0x3a0 [ 35.397785] __x64_sys_munmap+0x59/0x80 [ 35.398250] do_syscall_64+0x3f/0x90 [ 35.398693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.399295] [ 35.399522] Second to last potentially related work creation: [ 35.400236] kasan_save_stack+0x22/0x50 [ 35.400719] __kasan_record_aux_stack+0x8e/0xa0 [ 35.401272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.401887] remove_vma+0x139/0x170 [ 35.402324] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.402854] do_vmi_munmap+0x1f1/0x2b0 [ 35.403308] mmap_region+0x1f9/0x2660 [ 35.403772] do_mmap+0x854/0xf00 [ 35.404189] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.404651] ksys_mmap_pgoff+0x3af/0x500 [ 35.405121] do_syscall_64+0x3f/0x90 [ 35.405567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.406164] [ 35.406367] The buggy address belongs to the object at ffff88800e656e80 [ 35.406367] which belongs to the cache vm_area_struct of size 168 [ 35.407758] The buggy address is located 88 bytes inside of [ 35.407758] freed 168-byte region [ffff88800e656e80, ffff88800e656f28) [ 35.409062] [ 35.409270] The buggy address belongs to the physical page: [ 35.409886] page:00000000639c8d1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe656 [ 35.410899] memcg:ffff88800f681a01 [ 35.411295] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.411914] page_type: 0xffffffff() [ 35.412365] raw: 0100000000000200 ffff88800879fc80 ffffea00003a78c0 dead000000000002 [ 35.413234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f681a01 [ 35.414089] page dumped because: kasan: bad access detected [ 35.414712] [ 35.414919] Memory state around the buggy address: [ 35.415473] ffff88800e656d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.416319] ffff88800e656e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.417109] >ffff88800e656e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.417906] ^ [ 35.418587] ffff88800e656f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.419394] ffff88800e656f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.420216] ================================================================== [ 35.421247] Disabling lock debugging due to kernel taint [ 37.209518] BUG: Bad rss-counter state mm:000000005124fc92 type:MM_FILEPAGES val:33 [ 37.210253] BUG: Bad rss-counter state mm:000000005124fc92 type:MM_ANONPAGES val:22 [ 37.603262] BUG: Bad rss-counter state mm:00000000d9867cb9 type:MM_FILEPAGES val:33 [ 37.604449] BUG: Bad rss-counter state mm:00000000d9867cb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8158' (ECDSA) to the list of known hosts. 2023/06/19 21:43:40 fuzzer started 2023/06/19 21:43:40 dialing manager at localhost:44161 2023/06/19 21:43:40 checking machine... 2023/06/19 21:43:40 checking revisions... [ 38.161394] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:43:40 testing simple program... [ 38.194274] cgroup: Unknown subsys name 'net' [ 38.222720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:43:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c7abc80 RCX=0000000000000006 RDX=1ffff110018f579f RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880196af918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ff00545000000000 R12=ffff88800d869ec0 R13=0000000000000000 R14=ffff8880196afa88 R15=00000000000000e8 RIP=ffffffff814c0324 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 00007f155e071900 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=00007ffcd8e66000 CR3=000000000d81c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019b4e440 RBX=ffff88800cbedc48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cbedc80 RBP=ffff888019b4df80 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=ffff88800cbedbe0 R13=ffff888019b4df80 R14=ffffffff818d9dc6 R15=ffff88800dad8f80 RIP=ffffffff818463cb RFL=00000006 [-----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=00007f068b42c0e0 CR3=000000000ee7a000 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=760f27884776c1b21b4deb3c975b7421 XMM02=ec2efd57dc4c00df000000000011c7b0 XMM03=7ceaf6c4d230a5ad000000000011c880 XMM04=3b3fae3facb24b0600000000000ae988 XMM05=dfcdbad4f1609c3700000000001352b8 XMM06=c992687b8b0319bc0000000000134120 XMM07=e042d86d42eb936e00000000001246e8 XMM08=7ceaf6c4d230a5ad000000000011c880 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000