syzkaller login: [ 31.346042] BUG: Bad rss-counter state mm:00000000fc931d1c type:MM_FILEPAGES val:33 [ 31.348060] BUG: Bad rss-counter state mm:00000000fc931d1c type:MM_ANONPAGES val:22 [ 31.502683] ================================================================== [ 31.503777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.504915] Read of size 8 at addr ffff888018523798 by task sshd/219 [ 31.506003] [ 31.506270] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.507311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.508469] Call Trace: [ 31.508884] [ 31.509195] dump_stack_lvl+0x91/0xf0 [ 31.509694] print_report+0xcc/0x620 [ 31.510193] ? __virt_addr_valid+0x102/0x340 [ 31.510767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.511409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.512032] kasan_report+0xbe/0xf0 [ 31.512514] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.513160] vma_interval_tree_remove+0xc75/0xec0 [ 31.513774] vma_prepare+0xc54/0x11a0 [ 31.514264] __split_vma+0x5af/0x950 [ 31.514742] ? __pfx___split_vma+0x10/0x10 [ 31.515292] ? find_held_lock+0x2c/0x110 [ 31.515817] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.516388] ? lock_is_held_type+0x9f/0x120 [ 31.516956] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.517564] ? mtree_range_walk+0x632/0x900 [ 31.518115] ? mas_walk+0x5c7/0x7c0 [ 31.518591] do_vmi_munmap+0x1f1/0x2b0 [ 31.519095] mmap_region+0x1f9/0x2660 [ 31.519583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.520100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.520838] ? __pfx_lock_acquire+0x10/0x10 [ 31.521377] ? __pfx_mmap_region+0x10/0x10 [ 31.521912] ? security_mmap_addr+0x7d/0xa0 [ 31.522466] ? get_unmapped_area+0x1f5/0x3f0 [ 31.523027] do_mmap+0x854/0xf00 [ 31.523479] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.523989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.524572] ksys_mmap_pgoff+0x3af/0x500 [ 31.525101] do_syscall_64+0x3f/0x90 [ 31.525580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.526240] RIP: 0033:0x7f876eb99d82 [ 31.526708] 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 [ 31.528882] RSP: 002b:00007ffd5e5314b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.529805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f876eb99d82 [ 31.530667] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f876dfd3000 [ 31.531524] RBP: 00007f876dfd3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.532382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bd0a1fec0 [ 31.533256] R13: 00007ffd5e5314d0 R14: 00007ffd5e531500 R15: 00007ffd5e531860 [ 31.534133] [ 31.534437] [ 31.534659] Allocated by task 212: [ 31.535095] kasan_save_stack+0x22/0x50 [ 31.535611] kasan_set_track+0x25/0x30 [ 31.536108] __kasan_slab_alloc+0x59/0x70 [ 31.536663] kmem_cache_alloc+0x16b/0x370 [ 31.537180] vm_area_dup+0x20/0x160 [ 31.537646] __split_vma+0x170/0x950 [ 31.538124] split_vma+0xc6/0x110 [ 31.538569] mprotect_fixup+0x8d2/0xb30 [ 31.539072] do_mprotect_pkey+0x87e/0xd40 [ 31.539593] __x64_sys_mprotect+0x78/0xc0 [ 31.540125] do_syscall_64+0x3f/0x90 [ 31.540615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.541267] [ 31.541485] Freed by task 212: [ 31.541883] kasan_save_stack+0x22/0x50 [ 31.542400] kasan_set_track+0x25/0x30 [ 31.542904] kasan_save_free_info+0x2b/0x50 [ 31.543445] __kasan_slab_free+0x10a/0x190 [ 31.543988] kmem_cache_free+0x10d/0x4d0 [ 31.544582] rcu_core+0x8c8/0x2860 [ 31.545186] __do_softirq+0x1b7/0x7d4 [ 31.545801] [ 31.546069] Last potentially related work creation: [ 31.546848] kasan_save_stack+0x22/0x50 [ 31.547476] __kasan_record_aux_stack+0x8e/0xa0 [ 31.548216] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.549047] remove_vma+0x139/0x170 [ 31.549646] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.550349] do_vmi_munmap+0x1f1/0x2b0 [ 31.550975] __vm_munmap+0x138/0x3a0 [ 31.551571] __x64_sys_munmap+0x59/0x80 [ 31.552208] do_syscall_64+0x3f/0x90 [ 31.552851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.553560] [ 31.553794] The buggy address belongs to the object at ffff888018523740 [ 31.553794] which belongs to the cache vm_area_struct of size 168 [ 31.555316] The buggy address is located 88 bytes inside of [ 31.555316] freed 168-byte region [ffff888018523740, ffff8880185237e8) [ 31.556783] [ 31.557008] The buggy address belongs to the physical page: [ 31.557731] page:0000000057d9da9e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18523 [ 31.558887] memcg:ffff8880199a2e01 [ 31.559331] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.560022] page_type: 0xffffffff() [ 31.560501] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.561437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199a2e01 [ 31.562353] page dumped because: kasan: bad access detected [ 31.563043] [ 31.563269] Memory state around the buggy address: [ 31.563866] ffff888018523680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.564754] ffff888018523700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.565670] >ffff888018523780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.566604] ^ [ 31.567155] ffff888018523800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.568084] ffff888018523880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.569001] ================================================================== [ 31.570005] Disabling lock debugging due to kernel taint [ 33.876550] BUG: Bad rss-counter state mm:0000000001a70651 type:MM_FILEPAGES val:33 [ 33.877722] BUG: Bad rss-counter state mm:0000000001a70651 type:MM_ANONPAGES val:22 [ 34.263138] BUG: Bad rss-counter state mm:0000000073fe166f type:MM_FILEPAGES val:33 [ 34.264139] BUG: Bad rss-counter state mm:0000000073fe166f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5291' (ECDSA) to the list of known hosts. 2023/06/21 01:38:47 fuzzer started 2023/06/21 01:38:47 dialing manager at localhost:36067 2023/06/21 01:38:47 checking machine... 2023/06/21 01:38:47 checking revisions... [ 34.949793] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:38:47 testing simple program... [ 35.000640] cgroup: Unknown subsys name 'net' [ 35.039812] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:47 Registers: info registers vcpu 0 RAX=ffffffff8451105e RBX=0000000000000002 RCX=ffffffff860a1440 RDX=dffffc0000000000 RSI=ffff88806ce09ff0 RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff8113106f 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 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=00007f3637c1fbb0 CR3=000000000c694000 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=be909c922934e5b3594844c41acc7ca3 XMM02=000000000011b8c0eff9b2d0a8fce9cb XMM03=000000000011b9902c67c8bc2e329bc3 XMM04=58040cc0c1c57b0400000000000ae988 XMM05=dfcdbad4f1609c3700000000001321e0 XMM06=c685b4229b5101e70000000000131048 XMM07=e042d86d42eb936e0000000000122600 XMM08=1f17d83a97104680000000000011b990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613871f RBX=0000000000000001 RCX=ffffffff8613871e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880197bf5f8 RSP=ffff8880197bf530 R8 =ffffffff86138722 R9 =ffff8880197bf5e0 R10=0000000000038001 R11=0000000000020c57 R12=ffff8880197bf600 R13=ffff8880197bf5e8 R14=ffff8880197bf870 R15=ffff8880197bf5a0 RIP=ffffffff81131762 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 00007f5ab99e6900 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=00007ffd1fd7b000 CR3=0000000019aa4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000