syzkaller login: [ 30.672975] BUG: Bad rss-counter state mm:0000000008148ebc type:MM_FILEPAGES val:33 [ 30.674472] BUG: Bad rss-counter state mm:0000000008148ebc type:MM_ANONPAGES val:22 [ 30.845818] ================================================================== [ 30.846735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.847696] Read of size 8 at addr ffff88800f146798 by task sshd/221 [ 30.848664] [ 30.848914] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.849788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.850836] Call Trace: [ 30.851189] [ 30.851484] dump_stack_lvl+0x91/0xf0 [ 30.852034] print_report+0xcc/0x620 [ 30.852592] ? __virt_addr_valid+0x102/0x340 [ 30.853185] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853817] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854473] kasan_report+0xbe/0xf0 [ 30.855029] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855694] vma_interval_tree_remove+0xc75/0xec0 [ 30.856317] vma_prepare+0xc54/0x11a0 [ 30.856842] __split_vma+0x5af/0x950 [ 30.857321] ? __pfx___split_vma+0x10/0x10 [ 30.857974] ? find_held_lock+0x2c/0x110 [ 30.858647] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859417] ? lock_is_held_type+0x9f/0x120 [ 30.860124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860919] ? mtree_range_walk+0x632/0x900 [ 30.861644] ? mas_walk+0x5c7/0x7c0 [ 30.862271] do_vmi_munmap+0x1f1/0x2b0 [ 30.862929] mmap_region+0x1f9/0x2660 [ 30.863484] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.864042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864765] ? __pfx_lock_acquire+0x10/0x10 [ 30.865394] ? __pfx_mmap_region+0x10/0x10 [ 30.865943] ? security_mmap_addr+0x7d/0xa0 [ 30.866481] ? get_unmapped_area+0x1f5/0x3f0 [ 30.867065] do_mmap+0x854/0xf00 [ 30.867586] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.868135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.868733] ksys_mmap_pgoff+0x3af/0x500 [ 30.869275] do_syscall_64+0x3f/0x90 [ 30.869792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870551] RIP: 0033:0x7fb085506d82 [ 30.871023] 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 [ 30.873314] RSP: 002b:00007ffe881fc008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.874248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb085506d82 [ 30.875211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb084940000 [ 30.876121] RBP: 00007fb084940000 R08: 0000000000000009 R09: 0000000000001000 [ 30.877006] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9488fcec0 [ 30.877935] R13: 00007ffe881fc020 R14: 00007ffe881fc050 R15: 00007ffe881fc3b0 [ 30.878843] [ 30.879180] [ 30.879402] Allocated by task 214: [ 30.879861] kasan_save_stack+0x22/0x50 [ 30.880468] kasan_set_track+0x25/0x30 [ 30.880997] __kasan_slab_alloc+0x59/0x70 [ 30.881526] kmem_cache_alloc+0x16b/0x370 [ 30.882169] vm_area_dup+0x20/0x160 [ 30.882791] __split_vma+0x170/0x950 [ 30.883303] split_vma+0xc6/0x110 [ 30.883746] mprotect_fixup+0x8d2/0xb30 [ 30.884269] do_mprotect_pkey+0x87e/0xd40 [ 30.884833] __x64_sys_mprotect+0x78/0xc0 [ 30.885438] do_syscall_64+0x3f/0x90 [ 30.885961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.886614] [ 30.886841] Freed by task 214: [ 30.887281] kasan_save_stack+0x22/0x50 [ 30.887858] kasan_set_track+0x25/0x30 [ 30.888394] kasan_save_free_info+0x2b/0x50 [ 30.888943] __kasan_slab_free+0x10a/0x190 [ 30.889569] kmem_cache_free+0x10d/0x4d0 [ 30.890136] rcu_core+0x8c8/0x2860 [ 30.890642] __do_softirq+0x1b7/0x7d4 [ 30.891142] [ 30.891377] Last potentially related work creation: [ 30.891972] kasan_save_stack+0x22/0x50 [ 30.892506] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.893854] remove_vma+0x139/0x170 [ 30.894318] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.894913] do_vmi_munmap+0x1f1/0x2b0 [ 30.895500] __vm_munmap+0x138/0x3a0 [ 30.896022] __x64_sys_munmap+0x59/0x80 [ 30.896524] do_syscall_64+0x3f/0x90 [ 30.897013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897707] [ 30.897961] The buggy address belongs to the object at ffff88800f146740 [ 30.897961] which belongs to the cache vm_area_struct of size 168 [ 30.899527] The buggy address is located 88 bytes inside of [ 30.899527] freed 168-byte region [ffff88800f146740, ffff88800f1467e8) [ 30.901073] [ 30.901296] The buggy address belongs to the physical page: [ 30.901982] page:000000008e1bd9c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf146 [ 30.903190] memcg:ffff888014499101 [ 30.903623] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.904366] page_type: 0xffffffff() [ 30.904833] raw: 0100000000000200 ffff8880087a0c80 ffffea00003571c0 dead000000000005 [ 30.905839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014499101 [ 30.906752] page dumped because: kasan: bad access detected [ 30.907477] [ 30.907755] Memory state around the buggy address: [ 30.908377] ffff88800f146680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.909274] ffff88800f146700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.910207] >ffff88800f146780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.911118] ^ [ 30.911633] ffff88800f146800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.912536] ffff88800f146880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.913471] ================================================================== [ 30.914411] Disabling lock debugging due to kernel taint [ 32.437116] BUG: Bad rss-counter state mm:000000006929d7a0 type:MM_FILEPAGES val:33 [ 32.437865] BUG: Bad rss-counter state mm:000000006929d7a0 type:MM_ANONPAGES val:22 [ 32.929925] BUG: Bad rss-counter state mm:00000000959e2eb9 type:MM_FILEPAGES val:33 [ 32.930917] BUG: Bad rss-counter state mm:00000000959e2eb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1121' (ECDSA) to the list of known hosts. 2023/06/20 16:56:22 fuzzer started 2023/06/20 16:56:22 dialing manager at localhost:36067 2023/06/20 16:56:22 checking machine... 2023/06/20 16:56:22 checking revisions... [ 33.647471] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:56:22 testing simple program... [ 33.694134] cgroup: Unknown subsys name 'net' [ 33.760311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:56:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff110011b3f3a RSI=ffffffff8180ca5a RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =ffffffff86139748 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff8880093c61b0 RIP=ffffffff813ad47e RFL=00000286 [--S--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 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=00007f52603d5650 CR3=000000000ec8e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888010377648 RCX=0000000000000001 RDX=1ffff1100206eeca RSI=ffff8880103779b0 RDI=ffff888010377650 RBP=ffff8880103779b0 RSP=ffff8880103775a0 R8 =0000000000000001 R9 =ffff888010377688 R10=0000000000038001 R11=0000000000020de5 R12=0000000000000008 R13=ffff888010377690 R14=ffff8880103779b0 R15=ffff888010377648 RIP=ffffffff81130445 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 00007f52fc3fd900 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=00007f52fb890b10 CR3=000000000d79a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f7d22c13a1512bd700000000000ae988 XMM05=b83d8b32fcaafcef00000000001346b0 XMM06=e4cb8bb95a7664b60000000000133510 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000