syzkaller login: [ 30.429253] BUG: Bad rss-counter state mm:000000007372f876 type:MM_FILEPAGES val:33 [ 30.430247] BUG: Bad rss-counter state mm:000000007372f876 type:MM_ANONPAGES val:22 [ 30.589798] ================================================================== [ 30.590884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.592005] Read of size 8 at addr ffff888016ef74e0 by task sshd/221 [ 30.593044] [ 30.593306] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.594325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.595497] Call Trace: [ 30.595872] [ 30.596155] dump_stack_lvl+0x91/0xf0 [ 30.596644] print_report+0xcc/0x620 [ 30.597140] ? __virt_addr_valid+0x102/0x340 [ 30.597692] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.598314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.598928] kasan_report+0xbe/0xf0 [ 30.599413] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.600058] vma_interval_tree_remove+0xc75/0xec0 [ 30.600685] vma_prepare+0xc54/0x11a0 [ 30.601196] __split_vma+0x5af/0x950 [ 30.601684] ? __pfx___split_vma+0x10/0x10 [ 30.602228] ? find_held_lock+0x2c/0x110 [ 30.602769] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.603358] ? lock_is_held_type+0x9f/0x120 [ 30.603920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.604551] ? mtree_range_walk+0x632/0x900 [ 30.605147] ? mas_walk+0x5c7/0x7c0 [ 30.605641] do_vmi_munmap+0x1f1/0x2b0 [ 30.606146] mmap_region+0x1f9/0x2660 [ 30.606651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.607184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.607932] ? __pfx_lock_acquire+0x10/0x10 [ 30.608497] ? __pfx_mmap_region+0x10/0x10 [ 30.609058] ? security_mmap_addr+0x7d/0xa0 [ 30.609613] ? get_unmapped_area+0x1f5/0x3f0 [ 30.610181] do_mmap+0x854/0xf00 [ 30.610639] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.611149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.611735] ksys_mmap_pgoff+0x3af/0x500 [ 30.612266] do_syscall_64+0x3f/0x90 [ 30.612767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.613453] RIP: 0033:0x7f883b555d82 [ 30.613929] 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 [ 30.616151] RSP: 002b:00007ffe067846a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.617119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f883b555d82 [ 30.618008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f883a98f000 [ 30.618896] RBP: 00007f883a98f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.619788] R10: 0000000000000812 R11: 0000000000000206 R12: 000055556d781b20 [ 30.620675] R13: 00007ffe067846c0 R14: 00007ffe067846f0 R15: 00007ffe06784a50 [ 30.621568] [ 30.621874] [ 30.622093] Allocated by task 213: [ 30.622537] kasan_save_stack+0x22/0x50 [ 30.623070] kasan_set_track+0x25/0x30 [ 30.623574] __kasan_slab_alloc+0x59/0x70 [ 30.624120] kmem_cache_alloc+0x16b/0x370 [ 30.624651] vm_area_dup+0x20/0x160 [ 30.625143] __split_vma+0x170/0x950 [ 30.625627] split_vma+0xc6/0x110 [ 30.626092] mprotect_fixup+0x8d2/0xb30 [ 30.626616] do_mprotect_pkey+0x87e/0xd40 [ 30.627160] __x64_sys_mprotect+0x78/0xc0 [ 30.627698] do_syscall_64+0x3f/0x90 [ 30.628190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.628869] [ 30.629091] Freed by task 203: [ 30.629493] kasan_save_stack+0x22/0x50 [ 30.630018] kasan_set_track+0x25/0x30 [ 30.630529] kasan_save_free_info+0x2b/0x50 [ 30.631082] __kasan_slab_free+0x10a/0x190 [ 30.631630] kmem_cache_free+0x10d/0x4d0 [ 30.632155] rcu_core+0x8c8/0x2860 [ 30.632615] __do_softirq+0x1b7/0x7d4 [ 30.633128] [ 30.633403] Last potentially related work creation: [ 30.634021] kasan_save_stack+0x22/0x50 [ 30.634539] __kasan_record_aux_stack+0x8e/0xa0 [ 30.635126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.635790] remove_vma+0x139/0x170 [ 30.636257] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.636844] do_vmi_munmap+0x1f1/0x2b0 [ 30.637357] __vm_munmap+0x138/0x3a0 [ 30.637838] __x64_sys_munmap+0x59/0x80 [ 30.638362] do_syscall_64+0x3f/0x90 [ 30.638853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.639513] [ 30.639741] The buggy address belongs to the object at ffff888016ef7488 [ 30.639741] which belongs to the cache vm_area_struct of size 168 [ 30.641305] The buggy address is located 88 bytes inside of [ 30.641305] freed 168-byte region [ffff888016ef7488, ffff888016ef7530) [ 30.642761] [ 30.642986] The buggy address belongs to the physical page: [ 30.643682] page:00000000e6716e11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ef7 [ 30.644822] memcg:ffff888013ea3601 [ 30.645290] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.645956] page_type: 0xffffffff() [ 30.646434] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.647392] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ea3601 [ 30.648344] page dumped because: kasan: bad access detected [ 30.649054] [ 30.649270] Memory state around the buggy address: [ 30.649881] ffff888016ef7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.650784] ffff888016ef7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.651692] >ffff888016ef7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.652569] ^ [ 30.653370] ffff888016ef7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.654274] ffff888016ef7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.655151] ================================================================== [ 30.656118] Disabling lock debugging due to kernel taint [ 32.922276] BUG: Bad rss-counter state mm:000000004c8ef46f type:MM_FILEPAGES val:33 [ 32.923412] BUG: Bad rss-counter state mm:000000004c8ef46f type:MM_ANONPAGES val:22 [ 33.318306] BUG: Bad rss-counter state mm:000000002906b44e type:MM_FILEPAGES val:33 [ 33.319057] BUG: Bad rss-counter state mm:000000002906b44e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1933' (ECDSA) to the list of known hosts. 2023/06/20 18:45:20 fuzzer started 2023/06/20 18:45:20 dialing manager at localhost:36067 2023/06/20 18:45:20 checking machine... 2023/06/20 18:45:20 checking revisions... [ 33.932139] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:45:20 testing simple program... [ 33.982330] cgroup: Unknown subsys name 'net' [ 34.020256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:20 Registers: info registers vcpu 0 RAX=1ffff11001c707db RBX=ffff88800e383ea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e383ed8 RBP=ffff88800e8f6000 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e8f45c0 R14=ffffffff813782f8 R15=ffff88800e8f45c0 RIP=ffffffff818464e2 RFL=00000046 [---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 00007fc9ac995900 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=000055b5cdc21c78 CR3=000000000d5e0000 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=1bf6c44f20f46faf00000000000ae988 XMM05=1319e678c5640f8a0000000000132710 XMM06=94aac670ef06ff650000000000132678 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc16 RBX=ffffffff85dfe0b0 RCX=ffffffff8180ca59 RDX=0000000000000000 RSI=ffffffff86138f52 RDI=ffffffff85dfe0a0 RBP=ffffffff85dfe0a0 RSP=ffff888016ba74f0 R8 =ffffffff86138f52 R9 =ffff888016ba75e8 R10=0000000000038001 R11=0000000000020db7 R12=ffffffff85dfe0c0 R13=ffffffff85dfe0a0 R14=ffffffff85dfe0a0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fe1efc03900 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=00007ffec4eb0000 CR3=000000000c814000 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