syzkaller login: [ 35.759822] BUG: Bad rss-counter state mm:000000005d9af7f4 type:MM_FILEPAGES val:33 [ 35.761449] BUG: Bad rss-counter state mm:000000005d9af7f4 type:MM_ANONPAGES val:22 [ 35.918050] ================================================================== [ 35.919118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.920235] Read of size 8 at addr ffff888018c44b38 by task sshd/220 [ 35.921296] [ 35.921553] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.922547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.923682] Call Trace: [ 35.924087] [ 35.924418] dump_stack_lvl+0x91/0xf0 [ 35.924992] print_report+0xcc/0x620 [ 35.925552] ? __virt_addr_valid+0x102/0x340 [ 35.926192] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.926906] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.927616] kasan_report+0xbe/0xf0 [ 35.928201] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.928938] vma_interval_tree_remove+0xc75/0xec0 [ 35.929653] vma_prepare+0xc54/0x11a0 [ 35.930221] __split_vma+0x5af/0x950 [ 35.930787] ? __pfx___split_vma+0x10/0x10 [ 35.931411] ? find_held_lock+0x2c/0x110 [ 35.932032] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.932703] ? lock_is_held_type+0x9f/0x120 [ 35.933338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.934046] ? mtree_range_walk+0x632/0x900 [ 35.934699] ? mas_walk+0x5c7/0x7c0 [ 35.935253] do_vmi_munmap+0x1f1/0x2b0 [ 35.935861] mmap_region+0x1f9/0x2660 [ 35.936427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.937034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.937876] ? __pfx_lock_acquire+0x10/0x10 [ 35.938494] ? __pfx_mmap_region+0x10/0x10 [ 35.939119] ? security_mmap_addr+0x7d/0xa0 [ 35.939746] ? get_unmapped_area+0x1f5/0x3f0 [ 35.940404] do_mmap+0x854/0xf00 [ 35.940916] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.941489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.942154] ksys_mmap_pgoff+0x3af/0x500 [ 35.942748] do_syscall_64+0x3f/0x90 [ 35.943311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.944085] RIP: 0033:0x7fc63476ad82 [ 35.944624] 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 [ 35.947117] RSP: 002b:00007fff06e3a208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.948203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc63476ad82 [ 35.949191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc633ba4000 [ 35.950177] RBP: 00007fc633ba4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.951160] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628615dbb20 [ 35.952149] R13: 00007fff06e3a220 R14: 00007fff06e3a250 R15: 00007fff06e3a5b0 [ 35.953141] [ 35.953479] [ 35.953728] Allocated by task 213: [ 35.954222] kasan_save_stack+0x22/0x50 [ 35.954804] kasan_set_track+0x25/0x30 [ 35.955371] __kasan_slab_alloc+0x59/0x70 [ 35.955998] kmem_cache_alloc+0x16b/0x370 [ 35.956597] vm_area_dup+0x20/0x160 [ 35.957121] __split_vma+0x170/0x950 [ 35.957665] split_vma+0xc6/0x110 [ 35.958176] mprotect_fixup+0x8d2/0xb30 [ 35.958756] do_mprotect_pkey+0x87e/0xd40 [ 35.959349] __x64_sys_mprotect+0x78/0xc0 [ 35.959966] do_syscall_64+0x3f/0x90 [ 35.960521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.961371] [ 35.961620] Freed by task 213: [ 35.962075] kasan_save_stack+0x22/0x50 [ 35.962665] kasan_set_track+0x25/0x30 [ 35.963239] kasan_save_free_info+0x2b/0x50 [ 35.963874] __kasan_slab_free+0x10a/0x190 [ 35.964486] kmem_cache_free+0x10d/0x4d0 [ 35.965074] rcu_core+0x8c8/0x2860 [ 35.965588] __do_softirq+0x1b7/0x7d4 [ 35.966135] [ 35.966382] Last potentially related work creation: [ 35.967064] kasan_save_stack+0x22/0x50 [ 35.967642] __kasan_record_aux_stack+0x8e/0xa0 [ 35.968315] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.969055] remove_vma+0x139/0x170 [ 35.969578] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.970218] do_vmi_munmap+0x1f1/0x2b0 [ 35.970778] __vm_munmap+0x138/0x3a0 [ 35.971319] __x64_sys_munmap+0x59/0x80 [ 35.971901] do_syscall_64+0x3f/0x90 [ 35.972445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.973178] [ 35.973426] The buggy address belongs to the object at ffff888018c44ae0 [ 35.973426] which belongs to the cache vm_area_struct of size 168 [ 35.975110] The buggy address is located 88 bytes inside of [ 35.975110] freed 168-byte region [ffff888018c44ae0, ffff888018c44b88) [ 35.976744] [ 35.976994] The buggy address belongs to the physical page: [ 35.977764] page:00000000d7b99271 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c44 [ 35.979012] memcg:ffff888013a7fb01 [ 35.979500] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.980247] page_type: 0xffffffff() [ 35.980762] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.981804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013a7fb01 [ 35.982833] page dumped because: kasan: bad access detected [ 35.983585] [ 35.983853] Memory state around the buggy address: [ 35.984521] ffff888018c44a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.985505] ffff888018c44a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.986481] >ffff888018c44b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.987452] ^ [ 35.988159] ffff888018c44b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.989127] ffff888018c44c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.990105] ================================================================== [ 35.991315] Disabling lock debugging due to kernel taint [ 38.107363] BUG: Bad rss-counter state mm:000000003cf50f42 type:MM_FILEPAGES val:33 [ 38.108423] BUG: Bad rss-counter state mm:000000003cf50f42 type:MM_ANONPAGES val:22 [ 38.584454] BUG: Bad rss-counter state mm:0000000012df18b8 type:MM_FILEPAGES val:33 [ 38.585630] BUG: Bad rss-counter state mm:0000000012df18b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25486' (ECDSA) to the list of known hosts. 2023/06/20 22:55:13 fuzzer started 2023/06/20 22:55:13 dialing manager at localhost:36067 2023/06/20 22:55:13 checking machine... 2023/06/20 22:55:13 checking revisions... [ 39.226070] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:55:13 testing simple program... [ 39.272108] cgroup: Unknown subsys name 'net' [ 39.313557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:55:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e394fc0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888015d27ce8 RBP=1ffff11002ba4f99 RSP=ffff888015d27cc0 R8 =0000000000000001 R9 =ffffed1002ba4f9d R10=0000000000000003 R11=0000000000000000 R12=ffff88800e394fc8 R13=ffff88800e394fd0 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff812e0146 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 00007f4e63e25900 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=00007ffcdfaaa000 CR3=000000000f6bc000 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=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 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=00007f86b3520000 CR3=0000000014606000 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=00000000000000000000000000000000 XMM01=0eb26fe3e6bc9d882049df5d6d54357a XMM02=000000000011b218ec2efd57dc4c00df XMM03=0000000000121bb877b3ad25432e6396 XMM04=c54a404ac4d664a600000000000ae988 XMM05=19e9129bd510f2350000000000131760 XMM06=f098066cec8cfb300000000000130938 XMM07=e042d86d42eb936e0000000000121e90 XMM08=77b3ad25432e6396000000000011b278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000