syzkaller login: [ 30.423490] BUG: Bad rss-counter state mm:00000000ad51b996 type:MM_FILEPAGES val:33 [ 30.424600] BUG: Bad rss-counter state mm:00000000ad51b996 type:MM_ANONPAGES val:22 [ 30.594013] ================================================================== [ 30.594876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.595757] Read of size 8 at addr ffff88800c6344e0 by task sshd/220 [ 30.596509] [ 30.596729] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.597703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.598697] Call Trace: [ 30.599019] [ 30.599306] dump_stack_lvl+0x91/0xf0 [ 30.599813] print_report+0xcc/0x620 [ 30.600320] ? __virt_addr_valid+0x102/0x340 [ 30.600841] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.601447] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.602081] kasan_report+0xbe/0xf0 [ 30.602550] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.603130] vma_interval_tree_remove+0xc75/0xec0 [ 30.603702] vma_prepare+0xc54/0x11a0 [ 30.604167] __split_vma+0x5af/0x950 [ 30.604617] ? __pfx___split_vma+0x10/0x10 [ 30.605113] ? find_held_lock+0x2c/0x110 [ 30.605605] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.606142] ? lock_is_held_type+0x9f/0x120 [ 30.606649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.607220] ? mtree_range_walk+0x632/0x900 [ 30.607743] ? mas_walk+0x5c7/0x7c0 [ 30.608198] do_vmi_munmap+0x1f1/0x2b0 [ 30.608661] mmap_region+0x1f9/0x2660 [ 30.609121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.609630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.610332] ? __pfx_lock_acquire+0x10/0x10 [ 30.610855] ? __pfx_mmap_region+0x10/0x10 [ 30.611391] ? security_mmap_addr+0x7d/0xa0 [ 30.611905] ? get_unmapped_area+0x1f5/0x3f0 [ 30.612473] do_mmap+0x854/0xf00 [ 30.612913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.613395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.613968] ksys_mmap_pgoff+0x3af/0x500 [ 30.614496] do_syscall_64+0x3f/0x90 [ 30.614971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615580] RIP: 0033:0x7fb992973d82 [ 30.616010] 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 [ 30.618136] RSP: 002b:00007ffcc94ba158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.618982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb992973d82 [ 30.619784] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb991dad000 [ 30.620594] RBP: 00007fb991dad000 R08: 0000000000000009 R09: 0000000000001000 [ 30.621483] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c82f47b20 [ 30.622345] R13: 00007ffcc94ba170 R14: 00007ffcc94ba1a0 R15: 00007ffcc94ba500 [ 30.623193] [ 30.623491] [ 30.623711] Allocated by task 213: [ 30.624160] kasan_save_stack+0x22/0x50 [ 30.624665] kasan_set_track+0x25/0x30 [ 30.625158] __kasan_slab_alloc+0x59/0x70 [ 30.625701] kmem_cache_alloc+0x16b/0x370 [ 30.626220] vm_area_dup+0x20/0x160 [ 30.626653] __split_vma+0x170/0x950 [ 30.627092] split_vma+0xc6/0x110 [ 30.627518] mprotect_fixup+0x8d2/0xb30 [ 30.628025] do_mprotect_pkey+0x87e/0xd40 [ 30.628540] __x64_sys_mprotect+0x78/0xc0 [ 30.629027] do_syscall_64+0x3f/0x90 [ 30.629477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630084] [ 30.630292] Freed by task 213: [ 30.630659] kasan_save_stack+0x22/0x50 [ 30.631152] kasan_set_track+0x25/0x30 [ 30.631653] kasan_save_free_info+0x2b/0x50 [ 30.632327] __kasan_slab_free+0x10a/0x190 [ 30.632976] kmem_cache_free+0x10d/0x4d0 [ 30.633577] rcu_core+0x8c8/0x2860 [ 30.634108] __do_softirq+0x1b7/0x7d4 [ 30.634643] [ 30.634861] Last potentially related work creation: [ 30.635444] kasan_save_stack+0x22/0x50 [ 30.635934] __kasan_record_aux_stack+0x8e/0xa0 [ 30.636495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.637105] remove_vma+0x139/0x170 [ 30.637532] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.638060] do_vmi_munmap+0x1f1/0x2b0 [ 30.638520] __vm_munmap+0x138/0x3a0 [ 30.638961] __x64_sys_munmap+0x59/0x80 [ 30.639450] do_syscall_64+0x3f/0x90 [ 30.639963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.640716] [ 30.640961] The buggy address belongs to the object at ffff88800c634488 [ 30.640961] which belongs to the cache vm_area_struct of size 168 [ 30.642539] The buggy address is located 88 bytes inside of [ 30.642539] freed 168-byte region [ffff88800c634488, ffff88800c634530) [ 30.644068] [ 30.644287] The buggy address belongs to the physical page: [ 30.645036] page:00000000412f5fd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc634 [ 30.646157] memcg:ffff88800fe19301 [ 30.646581] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.647225] page_type: 0xffffffff() [ 30.647675] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.648772] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe19301 [ 30.649834] page dumped because: kasan: bad access detected [ 30.650481] [ 30.650724] Memory state around the buggy address: [ 30.651377] ffff88800c634380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.652206] ffff88800c634400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.653059] >ffff88800c634480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.653959] ^ [ 30.654844] ffff88800c634500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.655728] ffff88800c634580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.656546] ================================================================== [ 30.657583] Disabling lock debugging due to kernel taint [ 32.619418] BUG: Bad rss-counter state mm:000000005b856653 type:MM_FILEPAGES val:33 [ 32.620668] BUG: Bad rss-counter state mm:000000005b856653 type:MM_ANONPAGES val:22 [ 33.111010] BUG: Bad rss-counter state mm:000000000b3739a8 type:MM_FILEPAGES val:33 [ 33.112008] BUG: Bad rss-counter state mm:000000000b3739a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14423' (ECDSA) to the list of known hosts. 2023/06/20 13:28:45 fuzzer started 2023/06/20 13:28:45 dialing manager at localhost:36067 2023/06/20 13:28:45 checking machine... 2023/06/20 13:28:45 checking revisions... [ 33.846061] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:28:45 testing simple program... [ 33.913201] cgroup: Unknown subsys name 'net' [ 33.983813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:28:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe577bde0f0 CR3=000000000d466000 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=3cf9dee80ff5eea5034318e22a72000c XMM02=ec2efd57dc4c00df000000000011a528 XMM03=daa736b90f9366f2000000000011a5f8 XMM04=dbba5cd11567645900000000000ae988 XMM05=49ad2844f09db3c60000000000132a68 XMM06=4fda316b135da52b0000000000131b08 XMM07=e042d86d42eb936e00000000001220c0 XMM08=daa736b90f9366f2000000000011a5f8 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=00007f53583dd618 CR3=000000000e9fe000 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=2035343a38323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a38323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000