syzkaller login: [ 38.826148] BUG: Bad rss-counter state mm:00000000c4dd4aac type:MM_FILEPAGES val:33 [ 38.827347] BUG: Bad rss-counter state mm:00000000c4dd4aac type:MM_ANONPAGES val:22 [ 38.864255] ================================================================== [ 38.865226] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.866244] Read of size 8 at addr ffff888019e54b38 by task sshd/224 [ 38.867030] [ 38.867256] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.868152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.869129] Call Trace: [ 38.869455] [ 38.869739] dump_stack_lvl+0x91/0xf0 [ 38.870233] print_report+0xcc/0x620 [ 38.870725] ? __virt_addr_valid+0x102/0x340 [ 38.871286] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871906] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872542] kasan_report+0xbe/0xf0 [ 38.873031] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873661] vma_interval_tree_remove+0xc75/0xec0 [ 38.874273] vma_prepare+0xc54/0x11a0 [ 38.874752] __split_vma+0x5af/0x950 [ 38.875249] ? __pfx___split_vma+0x10/0x10 [ 38.875779] ? find_held_lock+0x2c/0x110 [ 38.876307] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.876874] ? lock_is_held_type+0x9f/0x120 [ 38.877413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.878022] ? mtree_range_walk+0x632/0x900 [ 38.878572] ? mas_walk+0x5c7/0x7c0 [ 38.879070] do_vmi_munmap+0x1f1/0x2b0 [ 38.879573] mmap_region+0x1f9/0x2660 [ 38.880060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.880574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.881294] ? __pfx_lock_acquire+0x10/0x10 [ 38.881834] ? __pfx_mmap_region+0x10/0x10 [ 38.882361] ? security_mmap_addr+0x7d/0xa0 [ 38.882902] ? get_unmapped_area+0x1f5/0x3f0 [ 38.883454] do_mmap+0x854/0xf00 [ 38.883894] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.884390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.884963] ksys_mmap_pgoff+0x3af/0x500 [ 38.885473] do_syscall_64+0x3f/0x90 [ 38.885956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886603] RIP: 0033:0x7f1682a79d82 [ 38.887070] 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 [ 38.889190] RSP: 002b:00007ffebae35b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.890094] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1682a79d82 [ 38.890958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1681eb3000 [ 38.891804] RBP: 00007f1681eb3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.892653] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8bc124d90 [ 38.893499] R13: 00007ffebae35b90 R14: 00007ffebae35bc0 R15: 00007ffebae35f20 [ 38.894353] [ 38.894648] [ 38.894879] Allocated by task 217: [ 38.895307] kasan_save_stack+0x22/0x50 [ 38.895814] kasan_set_track+0x25/0x30 [ 38.896305] __kasan_slab_alloc+0x59/0x70 [ 38.896828] kmem_cache_alloc+0x16b/0x370 [ 38.897358] vm_area_dup+0x20/0x160 [ 38.897813] __split_vma+0x170/0x950 [ 38.898291] split_vma+0xc6/0x110 [ 38.898728] mprotect_fixup+0x8d2/0xb30 [ 38.899252] do_mprotect_pkey+0x87e/0xd40 [ 38.899773] __x64_sys_mprotect+0x78/0xc0 [ 38.900307] do_syscall_64+0x3f/0x90 [ 38.900787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901428] [ 38.901646] Freed by task 217: [ 38.902039] kasan_save_stack+0x22/0x50 [ 38.902542] kasan_set_track+0x25/0x30 [ 38.903051] kasan_save_free_info+0x2b/0x50 [ 38.903579] __kasan_slab_free+0x10a/0x190 [ 38.904115] kmem_cache_free+0x10d/0x4d0 [ 38.904633] rcu_core+0x8c8/0x2860 [ 38.905083] __do_softirq+0x1b7/0x7d4 [ 38.905565] [ 38.905778] Last potentially related work creation: [ 38.906363] kasan_save_stack+0x22/0x50 [ 38.906884] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.908127] remove_vma+0x139/0x170 [ 38.908577] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.909130] do_vmi_munmap+0x1f1/0x2b0 [ 38.909616] __vm_munmap+0x138/0x3a0 [ 38.910081] __x64_sys_munmap+0x59/0x80 [ 38.910575] do_syscall_64+0x3f/0x90 [ 38.911064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911707] [ 38.911926] The buggy address belongs to the object at ffff888019e54ae0 [ 38.911926] which belongs to the cache vm_area_struct of size 168 [ 38.913390] The buggy address is located 88 bytes inside of [ 38.913390] freed 168-byte region [ffff888019e54ae0, ffff888019e54b88) [ 38.914789] [ 38.915025] The buggy address belongs to the physical page: [ 38.915688] page:00000000cf32e4de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e54 [ 38.916803] memcg:ffff88800ca3af01 [ 38.917231] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.917895] page_type: 0xffffffff() [ 38.918344] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.919282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca3af01 [ 38.920198] page dumped because: kasan: bad access detected [ 38.920876] [ 38.921097] Memory state around the buggy address: [ 38.921674] ffff888019e54a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.922551] ffff888019e54a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.923434] >ffff888019e54b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.924304] ^ [ 38.924919] ffff888019e54b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.925772] ffff888019e54c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.926626] ================================================================== [ 38.927714] Disabling lock debugging due to kernel taint [ 40.781106] BUG: Bad rss-counter state mm:00000000f2f52a5c type:MM_FILEPAGES val:33 [ 40.782566] BUG: Bad rss-counter state mm:00000000f2f52a5c type:MM_ANONPAGES val:22 [ 41.266264] BUG: Bad rss-counter state mm:000000006050bbbf type:MM_FILEPAGES val:33 [ 41.267251] BUG: Bad rss-counter state mm:000000006050bbbf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45210' (ECDSA) to the list of known hosts. 2023/06/21 04:53:23 fuzzer started 2023/06/21 04:53:24 dialing manager at localhost:36067 2023/06/21 04:53:24 checking machine... 2023/06/21 04:53:24 checking revisions... [ 41.905500] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:53:24 testing simple program... [ 41.935271] cgroup: Unknown subsys name 'net' [ 41.973475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000148 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000eb8 RDI=ffffffff818308d2 RBP=ffff88800db1c100 RSP=ffff8880147df608 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000eb8 R13=0000000000000200 R14=0000000000400cc0 R15=ffff888008f68000 RIP=ffffffff815343b0 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 00007f413261c900 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=00007f1013138200 CR3=000000000c7aa000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cba4cbea11f484d700000000000ae988 XMM05=cfe2fa00cc7b0bf40000000000132ba8 XMM06=993088549562ad030000000000131628 XMM07=fb795ef6d65770560000000000121b90 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffe8ffffd13418 RBX=000000000002c3c0 RCX=1ffffd1ffffa268a RDX=dffffc0000000000 RSI=ffffffff8145347c RDI=ffffe8ffffd13450 RBP=ffffffff852c7908 RSP=ffff88801687fe08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800f26e000 R13=0000000000000001 R14=ffff88806cf00000 R15=ffff88800f26e3a8 RIP=ffffffff814534e6 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd2443a7900 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=00007fd244efb044 CR3=000000000ea80000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000