syzkaller login: [ 33.157341] BUG: Bad rss-counter state mm:00000000ee652f3c type:MM_FILEPAGES val:33 [ 33.158324] BUG: Bad rss-counter state mm:00000000ee652f3c type:MM_ANONPAGES val:22 [ 33.335758] ================================================================== [ 33.336854] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.337966] Read of size 8 at addr ffff88800d007ed8 by task sshd/220 [ 33.338740] [ 33.338968] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.339842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.340827] Call Trace: [ 33.341159] [ 33.341445] dump_stack_lvl+0x91/0xf0 [ 33.341937] print_report+0xcc/0x620 [ 33.342444] ? __virt_addr_valid+0x102/0x340 [ 33.343027] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.343673] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.344298] kasan_report+0xbe/0xf0 [ 33.344778] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.345396] vma_interval_tree_remove+0xc75/0xec0 [ 33.346019] vma_prepare+0xc54/0x11a0 [ 33.346504] __split_vma+0x5af/0x950 [ 33.346989] ? __pfx___split_vma+0x10/0x10 [ 33.347513] ? find_held_lock+0x2c/0x110 [ 33.348045] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.348625] ? lock_is_held_type+0x9f/0x120 [ 33.349171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.349767] ? mtree_range_walk+0x632/0x900 [ 33.350349] ? mas_walk+0x5c7/0x7c0 [ 33.350820] do_vmi_munmap+0x1f1/0x2b0 [ 33.351327] mmap_region+0x1f9/0x2660 [ 33.351810] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.352324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.353059] ? __pfx_lock_acquire+0x10/0x10 [ 33.353595] ? __pfx_mmap_region+0x10/0x10 [ 33.354144] ? security_mmap_addr+0x7d/0xa0 [ 33.354668] ? get_unmapped_area+0x1f5/0x3f0 [ 33.355226] do_mmap+0x854/0xf00 [ 33.355661] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.356165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.356742] ksys_mmap_pgoff+0x3af/0x500 [ 33.357258] do_syscall_64+0x3f/0x90 [ 33.357727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.358391] RIP: 0033:0x7f7691650d82 [ 33.358847] 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 [ 33.360990] RSP: 002b:00007ffc95e85408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.361892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7691650d82 [ 33.362748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7690a8a000 [ 33.363590] RBP: 00007f7690a8a000 R08: 0000000000000009 R09: 0000000000001000 [ 33.364441] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1004fbf60 [ 33.365309] R13: 00007ffc95e85420 R14: 00007ffc95e85450 R15: 00007ffc95e857b0 [ 33.366203] [ 33.366494] [ 33.366709] Allocated by task 213: [ 33.367153] kasan_save_stack+0x22/0x50 [ 33.367654] kasan_set_track+0x25/0x30 [ 33.368163] __kasan_slab_alloc+0x59/0x70 [ 33.368711] kmem_cache_alloc+0x16b/0x370 [ 33.369237] vm_area_dup+0x20/0x160 [ 33.369690] __split_vma+0x170/0x950 [ 33.370174] split_vma+0xc6/0x110 [ 33.370614] mprotect_fixup+0x8d2/0xb30 [ 33.371129] do_mprotect_pkey+0x87e/0xd40 [ 33.371651] __x64_sys_mprotect+0x78/0xc0 [ 33.372181] do_syscall_64+0x3f/0x90 [ 33.372667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.373318] [ 33.373532] Freed by task 13: [ 33.373913] kasan_save_stack+0x22/0x50 [ 33.374438] kasan_set_track+0x25/0x30 [ 33.374935] kasan_save_free_info+0x2b/0x50 [ 33.375487] __kasan_slab_free+0x10a/0x190 [ 33.376032] kmem_cache_free+0x10d/0x4d0 [ 33.376570] rcu_core+0x8c8/0x2860 [ 33.377023] __do_softirq+0x1b7/0x7d4 [ 33.377493] [ 33.377707] Last potentially related work creation: [ 33.378308] kasan_save_stack+0x22/0x50 [ 33.378806] __kasan_record_aux_stack+0x8e/0xa0 [ 33.379391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.380058] remove_vma+0x139/0x170 [ 33.380528] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.381106] do_vmi_munmap+0x1f1/0x2b0 [ 33.381595] __vm_munmap+0x138/0x3a0 [ 33.382077] __x64_sys_munmap+0x59/0x80 [ 33.382580] do_syscall_64+0x3f/0x90 [ 33.383065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.383701] [ 33.383912] The buggy address belongs to the object at ffff88800d007e80 [ 33.383912] which belongs to the cache vm_area_struct of size 168 [ 33.385410] The buggy address is located 88 bytes inside of [ 33.385410] freed 168-byte region [ffff88800d007e80, ffff88800d007f28) [ 33.386846] [ 33.387077] The buggy address belongs to the physical page: [ 33.387732] page:000000008ea1eca6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd007 [ 33.388833] memcg:ffff888018213601 [ 33.389277] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.389915] page_type: 0xffffffff() [ 33.390384] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.391321] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018213601 [ 33.392221] page dumped because: kasan: bad access detected [ 33.392902] [ 33.393125] Memory state around the buggy address: [ 33.393699] ffff88800d007d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.394601] ffff88800d007e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.395457] >ffff88800d007e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.396305] ^ [ 33.397057] ffff88800d007f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.397903] ffff88800d007f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.398762] ================================================================== [ 33.399761] Disabling lock debugging due to kernel taint [ 35.503011] BUG: Bad rss-counter state mm:00000000dc7a3e60 type:MM_FILEPAGES val:33 [ 35.505138] BUG: Bad rss-counter state mm:00000000dc7a3e60 type:MM_ANONPAGES val:22 [ 35.964830] BUG: Bad rss-counter state mm:000000002683831d type:MM_FILEPAGES val:33 [ 35.965806] BUG: Bad rss-counter state mm:000000002683831d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23855' (ECDSA) to the list of known hosts. 2023/06/20 02:42:38 fuzzer started 2023/06/20 02:42:38 dialing manager at localhost:44161 2023/06/20 02:42:38 checking machine... 2023/06/20 02:42:38 checking revisions... [ 36.698320] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:42:38 testing simple program... [ 36.740854] cgroup: Unknown subsys name 'net' [ 36.788875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:42:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863dcb4e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fe5f4b0 RSP=ffff88800fe5f3e8 R8 =ffffffff863dcb52 R9 =ffff88800fe5f498 R10=0000000000038001 R11=0000000000091beb R12=ffff88800fe5f4b8 R13=ffff88800fe5f4a0 R14=0000000000000004 R15=ffff88800fe5f458 RIP=ffffffff81131711 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 00007fe494682900 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=00007fff3f5ed000 CR3=000000001832e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f06e58cdff0 CR3=0000000015f48000 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=2038333a32343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000