syzkaller login: [ 30.399699] BUG: Bad rss-counter state mm:000000007e0931ca type:MM_FILEPAGES val:33 [ 30.400603] BUG: Bad rss-counter state mm:000000007e0931ca type:MM_ANONPAGES val:22 [ 30.582475] ================================================================== [ 30.583597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.584912] Read of size 8 at addr ffff88801996b798 by task sshd/221 [ 30.585823] [ 30.586082] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.587122] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.588276] Call Trace: [ 30.588649] [ 30.588982] dump_stack_lvl+0x91/0xf0 [ 30.589562] print_report+0xcc/0x620 [ 30.590136] ? __virt_addr_valid+0x102/0x340 [ 30.590789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591519] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592287] kasan_report+0xbe/0xf0 [ 30.592872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.593632] vma_interval_tree_remove+0xc75/0xec0 [ 30.594377] vma_prepare+0xc54/0x11a0 [ 30.594964] __split_vma+0x5af/0x950 [ 30.595579] ? __pfx___split_vma+0x10/0x10 [ 30.596239] ? find_held_lock+0x2c/0x110 [ 30.596840] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.597454] ? lock_is_held_type+0x9f/0x120 [ 30.598045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.598715] ? mtree_range_walk+0x632/0x900 [ 30.599320] ? mas_walk+0x5c7/0x7c0 [ 30.599854] do_vmi_munmap+0x1f1/0x2b0 [ 30.600394] mmap_region+0x1f9/0x2660 [ 30.600922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.601484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.602266] ? __pfx_lock_acquire+0x10/0x10 [ 30.602850] ? __pfx_mmap_region+0x10/0x10 [ 30.603431] ? security_mmap_addr+0x7d/0xa0 [ 30.604025] ? get_unmapped_area+0x1f5/0x3f0 [ 30.604630] do_mmap+0x854/0xf00 [ 30.605110] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.605656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.606279] ksys_mmap_pgoff+0x3af/0x500 [ 30.606837] do_syscall_64+0x3f/0x90 [ 30.607357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.608083] RIP: 0033:0x7fcb2505ed82 [ 30.608593] 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 [ 30.610956] RSP: 002b:00007ffc2cfa94d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.611965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb2505ed82 [ 30.612904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb24498000 [ 30.613846] RBP: 00007fcb24498000 R08: 0000000000000009 R09: 0000000000001000 [ 30.614776] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650218f7d90 [ 30.615731] R13: 00007ffc2cfa94f0 R14: 00007ffc2cfa9520 R15: 00007ffc2cfa9880 [ 30.616684] [ 30.617007] [ 30.617246] Allocated by task 213: [ 30.617721] kasan_save_stack+0x22/0x50 [ 30.618279] kasan_set_track+0x25/0x30 [ 30.618817] __kasan_slab_alloc+0x59/0x70 [ 30.619393] kmem_cache_alloc+0x16b/0x370 [ 30.619967] vm_area_dup+0x20/0x160 [ 30.620465] __split_vma+0x170/0x950 [ 30.620987] split_vma+0xc6/0x110 [ 30.621470] mprotect_fixup+0x8d2/0xb30 [ 30.622019] do_mprotect_pkey+0x87e/0xd40 [ 30.622585] __x64_sys_mprotect+0x78/0xc0 [ 30.623160] do_syscall_64+0x3f/0x90 [ 30.623700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.624408] [ 30.624644] Freed by task 213: [ 30.625069] kasan_save_stack+0x22/0x50 [ 30.625617] kasan_set_track+0x25/0x30 [ 30.626159] kasan_save_free_info+0x2b/0x50 [ 30.626739] __kasan_slab_free+0x10a/0x190 [ 30.627323] kmem_cache_free+0x10d/0x4d0 [ 30.627890] rcu_core+0x8c8/0x2860 [ 30.628379] __do_softirq+0x1b7/0x7d4 [ 30.628902] [ 30.629141] Last potentially related work creation: [ 30.629796] kasan_save_stack+0x22/0x50 [ 30.630349] __kasan_record_aux_stack+0x8e/0xa0 [ 30.630981] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.631704] remove_vma+0x139/0x170 [ 30.632195] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.632808] do_vmi_munmap+0x1f1/0x2b0 [ 30.633345] __vm_munmap+0x138/0x3a0 [ 30.633858] __x64_sys_munmap+0x59/0x80 [ 30.634403] do_syscall_64+0x3f/0x90 [ 30.634917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635629] [ 30.635864] The buggy address belongs to the object at ffff88801996b740 [ 30.635864] which belongs to the cache vm_area_struct of size 168 [ 30.637508] The buggy address is located 88 bytes inside of [ 30.637508] freed 168-byte region [ffff88801996b740, ffff88801996b7e8) [ 30.639051] [ 30.639287] The buggy address belongs to the physical page: [ 30.640038] page:00000000c56a9004 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1996b [ 30.641244] memcg:ffff88800e848a01 [ 30.641709] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.642421] page_type: 0xffffffff() [ 30.642918] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.643947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e848a01 [ 30.644948] page dumped because: kasan: bad access detected [ 30.645685] [ 30.645922] Memory state around the buggy address: [ 30.646570] ffff88801996b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.647524] ffff88801996b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.648501] >ffff88801996b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.649449] ^ [ 30.649999] ffff88801996b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.650943] ffff88801996b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.651892] ================================================================== [ 30.653138] Disabling lock debugging due to kernel taint [ 32.771663] BUG: Bad rss-counter state mm:00000000ba2efdeb type:MM_FILEPAGES val:33 [ 32.773443] BUG: Bad rss-counter state mm:00000000ba2efdeb type:MM_ANONPAGES val:22 [ 33.255681] BUG: Bad rss-counter state mm:0000000062cfd58c type:MM_FILEPAGES val:33 [ 33.257271] BUG: Bad rss-counter state mm:0000000062cfd58c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38973' (ECDSA) to the list of known hosts. 2023/06/19 14:26:20 fuzzer started 2023/06/19 14:26:20 dialing manager at localhost:44161 2023/06/19 14:26:20 checking machine... 2023/06/19 14:26:20 checking revisions... [ 33.998469] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:26:20 testing simple program... [ 34.049442] cgroup: Unknown subsys name 'net' [ 34.120166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b08 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff84506c7f RDI=ffff88806ce09b14 RBP=0000000000000010 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09a80 R10=0000000000038001 R11=000000000002244e R12=ffff88806ce09b08 R13=0000000000000000 R14=ffff8880164251c0 R15=ffff8880168c6580 RIP=ffffffff813ad49e 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 00007f5428b59900 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=00007f380316a650 CR3=000000000c76a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1895ac5a1d6032bf00000000000ae988 XMM05=4582549d3569d5870000000000135e70 XMM06=e4cb8bb95a7664b60000000000134d08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd8f416d28 CR3=0000000015a4c000 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=36323a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000