syzkaller login: [ 30.707738] BUG: Bad rss-counter state mm:000000009320a2f5 type:MM_FILEPAGES val:33 [ 30.709171] BUG: Bad rss-counter state mm:000000009320a2f5 type:MM_ANONPAGES val:22 [ 30.874121] ================================================================== [ 30.875037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.875977] Read of size 8 at addr ffff88800e72f968 by task sshd/220 [ 30.876971] [ 30.877207] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.878134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.879186] Call Trace: [ 30.879526] [ 30.879835] dump_stack_lvl+0x91/0xf0 [ 30.880382] print_report+0xcc/0x620 [ 30.880898] ? __virt_addr_valid+0x102/0x340 [ 30.881464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882756] kasan_report+0xbe/0xf0 [ 30.883258] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883917] vma_interval_tree_remove+0xc75/0xec0 [ 30.884559] vma_prepare+0xc54/0x11a0 [ 30.885082] __split_vma+0x5af/0x950 [ 30.885566] ? __pfx___split_vma+0x10/0x10 [ 30.886125] ? find_held_lock+0x2c/0x110 [ 30.886657] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.887267] ? lock_is_held_type+0x9f/0x120 [ 30.887850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.888480] ? mtree_range_walk+0x632/0x900 [ 30.889077] ? mas_walk+0x5c7/0x7c0 [ 30.889574] do_vmi_munmap+0x1f1/0x2b0 [ 30.890092] mmap_region+0x1f9/0x2660 [ 30.890590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.891118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.891882] ? __pfx_lock_acquire+0x10/0x10 [ 30.892446] ? __pfx_mmap_region+0x10/0x10 [ 30.893024] ? security_mmap_addr+0x7d/0xa0 [ 30.893576] ? get_unmapped_area+0x1f5/0x3f0 [ 30.894171] do_mmap+0x854/0xf00 [ 30.894620] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.895146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.895729] ksys_mmap_pgoff+0x3af/0x500 [ 30.896257] do_syscall_64+0x3f/0x90 [ 30.896773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897447] RIP: 0033:0x7f013fd38d82 [ 30.897936] 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 [ 30.900129] RSP: 002b:00007ffc558f5958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.901091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f013fd38d82 [ 30.901986] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f013f172000 [ 30.902870] RBP: 00007f013f172000 R08: 0000000000000009 R09: 0000000000001000 [ 30.903742] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ab8148b20 [ 30.904624] R13: 00007ffc558f5970 R14: 00007ffc558f59a0 R15: 00007ffc558f5d00 [ 30.905499] [ 30.905816] [ 30.906049] Allocated by task 213: [ 30.906484] kasan_save_stack+0x22/0x50 [ 30.907003] kasan_set_track+0x25/0x30 [ 30.907513] __kasan_slab_alloc+0x59/0x70 [ 30.908080] kmem_cache_alloc+0x16b/0x370 [ 30.908611] vm_area_dup+0x20/0x160 [ 30.909108] __split_vma+0x170/0x950 [ 30.909583] split_vma+0xc6/0x110 [ 30.910043] mprotect_fixup+0x8d2/0xb30 [ 30.910565] do_mprotect_pkey+0x87e/0xd40 [ 30.911113] __x64_sys_mprotect+0x78/0xc0 [ 30.911662] do_syscall_64+0x3f/0x90 [ 30.912186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912888] [ 30.913123] Freed by task 213: [ 30.913532] kasan_save_stack+0x22/0x50 [ 30.914057] kasan_set_track+0x25/0x30 [ 30.914565] kasan_save_free_info+0x2b/0x50 [ 30.915141] __kasan_slab_free+0x10a/0x190 [ 30.915707] kmem_cache_free+0x10d/0x4d0 [ 30.916260] rcu_core+0x8c8/0x2860 [ 30.916750] __do_softirq+0x1b7/0x7d4 [ 30.917249] [ 30.917471] Last potentially related work creation: [ 30.918080] kasan_save_stack+0x22/0x50 [ 30.918595] __kasan_record_aux_stack+0x8e/0xa0 [ 30.919192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.919869] remove_vma+0x139/0x170 [ 30.920352] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.920941] do_vmi_munmap+0x1f1/0x2b0 [ 30.921449] __vm_munmap+0x138/0x3a0 [ 30.921948] __x64_sys_munmap+0x59/0x80 [ 30.922465] do_syscall_64+0x3f/0x90 [ 30.922956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923621] [ 30.923854] The buggy address belongs to the object at ffff88800e72f910 [ 30.923854] which belongs to the cache vm_area_struct of size 168 [ 30.925399] The buggy address is located 88 bytes inside of [ 30.925399] freed 168-byte region [ffff88800e72f910, ffff88800e72f9b8) [ 30.926874] [ 30.927112] The buggy address belongs to the physical page: [ 30.927798] page:00000000f2d47b91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe72f [ 30.928970] memcg:ffff88800c68fa01 [ 30.929399] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.930082] page_type: 0xffffffff() [ 30.930550] raw: 0100000000000200 ffff8880087a0c80 ffffea00003189c0 dead000000000004 [ 30.931510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c68fa01 [ 30.932507] page dumped because: kasan: bad access detected [ 30.933258] [ 30.933496] Memory state around the buggy address: [ 30.934154] ffff88800e72f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.935117] ffff88800e72f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.936119] >ffff88800e72f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.937073] ^ [ 30.937959] ffff88800e72f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.938914] ffff88800e72fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.939873] ================================================================== [ 30.941173] Disabling lock debugging due to kernel taint [ 32.745397] BUG: Bad rss-counter state mm:000000002d081da4 type:MM_FILEPAGES val:33 [ 32.746096] BUG: Bad rss-counter state mm:000000002d081da4 type:MM_ANONPAGES val:22 [ 33.266901] BUG: Bad rss-counter state mm:000000001e472edb type:MM_FILEPAGES val:33 [ 33.268212] BUG: Bad rss-counter state mm:000000001e472edb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50740' (ECDSA) to the list of known hosts. 2023/06/20 23:13:37 fuzzer started 2023/06/20 23:13:38 dialing manager at localhost:36067 2023/06/20 23:13:38 checking machine... 2023/06/20 23:13:38 checking revisions... [ 33.928311] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:13:38 testing simple program... [ 33.980624] cgroup: Unknown subsys name 'net' [ 34.056849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:13:37 Registers: info registers vcpu 0 RAX=ffffffff8185a068 RBX=ffffffff85e03988 RCX=ffffffff8185a07b RDX=0000000000000000 RSI=ffffffff8614148a RDI=ffffffff85e03970 RBP=ffffffff85e0398c RSP=ffff888017f0f8d0 R8 =ffffffff8614148a R9 =ffff888017f0f9c8 R10=0000000000038001 R11=00000000000223eb R12=ffffffff85e03990 R13=ffffffff85e03970 R14=ffffffff85e03980 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000202 [-------] 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 00007f049d3bd900 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=00007ffea0d71000 CR3=000000000c6da000 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=00007f6fc6789a70 CR3=000000000dc10000 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=2037333a33313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33313a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000