syzkaller login: [ 23.697487] BUG: Bad rss-counter state mm:00000000aebbd88f type:MM_FILEPAGES val:33 [ 23.698503] BUG: Bad rss-counter state mm:00000000aebbd88f type:MM_ANONPAGES val:22 [ 23.862579] ================================================================== [ 23.863482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.864409] Read of size 8 at addr ffff888015ec0df0 by task sshd/219 [ 23.865177] [ 23.865394] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.866367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.867359] Call Trace: [ 23.867679] [ 23.867959] dump_stack_lvl+0x91/0xf0 [ 23.868491] print_report+0xcc/0x620 [ 23.868977] ? __virt_addr_valid+0x102/0x340 [ 23.869557] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.870166] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.870781] kasan_report+0xbe/0xf0 [ 23.871258] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.871879] vma_interval_tree_remove+0xc75/0xec0 [ 23.872483] vma_prepare+0xc54/0x11a0 [ 23.872965] __split_vma+0x5af/0x950 [ 23.873451] ? __pfx___split_vma+0x10/0x10 [ 23.873980] ? find_held_lock+0x2c/0x110 [ 23.874504] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.875062] ? lock_is_held_type+0x9f/0x120 [ 23.875598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.876199] ? mtree_range_walk+0x632/0x900 [ 23.876750] ? mas_walk+0x5c7/0x7c0 [ 23.877237] do_vmi_munmap+0x1f1/0x2b0 [ 23.877721] mmap_region+0x1f9/0x2660 [ 23.878200] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.878707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.879415] ? __pfx_lock_acquire+0x10/0x10 [ 23.879945] ? __pfx_mmap_region+0x10/0x10 [ 23.880476] ? security_mmap_addr+0x7d/0xa0 [ 23.881027] ? get_unmapped_area+0x1f5/0x3f0 [ 23.881573] do_mmap+0x854/0xf00 [ 23.882010] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.882498] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.883057] ksys_mmap_pgoff+0x3af/0x500 [ 23.883565] do_syscall_64+0x3f/0x90 [ 23.884046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884688] RIP: 0033:0x7f33520a7d82 [ 23.885148] 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 [ 23.887248] RSP: 002b:00007ffda3d4dec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.888150] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33520a7d82 [ 23.889004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33514e1000 [ 23.889858] RBP: 00007f33514e1000 R08: 0000000000000009 R09: 0000000000001000 [ 23.890706] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617f593bec0 [ 23.891549] R13: 00007ffda3d4dee0 R14: 00007ffda3d4df10 R15: 00007ffda3d4e270 [ 23.892417] [ 23.892708] [ 23.892922] Allocated by task 212: [ 23.893373] kasan_save_stack+0x22/0x50 [ 23.893872] kasan_set_track+0x25/0x30 [ 23.894363] __kasan_slab_alloc+0x59/0x70 [ 23.894887] kmem_cache_alloc+0x16b/0x370 [ 23.895401] vm_area_dup+0x20/0x160 [ 23.895849] __split_vma+0x170/0x950 [ 23.896314] split_vma+0xc6/0x110 [ 23.896754] mprotect_fixup+0x8d2/0xb30 [ 23.897261] do_mprotect_pkey+0x87e/0xd40 [ 23.897788] __x64_sys_mprotect+0x78/0xc0 [ 23.898299] do_syscall_64+0x3f/0x90 [ 23.898769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.899401] [ 23.899614] Freed by task 212: [ 23.900000] kasan_save_stack+0x22/0x50 [ 23.900496] kasan_set_track+0x25/0x30 [ 23.901001] kasan_save_free_info+0x2b/0x50 [ 23.901531] __kasan_slab_free+0x10a/0x190 [ 23.902056] kmem_cache_free+0x10d/0x4d0 [ 23.902562] rcu_core+0x8c8/0x2860 [ 23.903002] __do_softirq+0x1b7/0x7d4 [ 23.903474] [ 23.903687] Last potentially related work creation: [ 23.904266] kasan_save_stack+0x22/0x50 [ 23.904765] __kasan_record_aux_stack+0x8e/0xa0 [ 23.905342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.905985] remove_vma+0x139/0x170 [ 23.906436] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.906986] do_vmi_munmap+0x1f1/0x2b0 [ 23.907469] __vm_munmap+0x138/0x3a0 [ 23.907933] __x64_sys_munmap+0x59/0x80 [ 23.908422] do_syscall_64+0x3f/0x90 [ 23.908893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.909545] [ 23.909756] Second to last potentially related work creation: [ 23.910432] kasan_save_stack+0x22/0x50 [ 23.910927] __kasan_record_aux_stack+0x8e/0xa0 [ 23.911496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.912131] remove_vma+0x139/0x170 [ 23.912578] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.913146] do_vmi_munmap+0x1f1/0x2b0 [ 23.913629] mmap_region+0x1f9/0x2660 [ 23.914102] do_mmap+0x854/0xf00 [ 23.914529] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.915011] ksys_mmap_pgoff+0x3af/0x500 [ 23.915508] do_syscall_64+0x3f/0x90 [ 23.915995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.916637] [ 23.916851] The buggy address belongs to the object at ffff888015ec0d98 [ 23.916851] which belongs to the cache vm_area_struct of size 168 [ 23.918372] The buggy address is located 88 bytes inside of [ 23.918372] freed 168-byte region [ffff888015ec0d98, ffff888015ec0e40) [ 23.919723] [ 23.919929] The buggy address belongs to the physical page: [ 23.920554] page:000000008470acf5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ec0 [ 23.921598] memcg:ffff88800e7d6501 [ 23.922003] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.922618] page_type: 0xffffffff() [ 23.923046] raw: 0100000000000200 ffff8880087a0c80 ffffea000036fe40 dead000000000004 [ 23.923917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7d6501 [ 23.924775] page dumped because: kasan: bad access detected [ 23.925410] [ 23.925619] Memory state around the buggy address: [ 23.926172] ffff888015ec0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.927017] ffff888015ec0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.927855] >ffff888015ec0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.928707] ^ [ 23.929518] ffff888015ec0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.930366] ffff888015ec0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.931209] ================================================================== [ 23.932245] Disabling lock debugging due to kernel taint [ 25.991324] BUG: Bad rss-counter state mm:000000005c8bf248 type:MM_FILEPAGES val:33 [ 25.992363] BUG: Bad rss-counter state mm:000000005c8bf248 type:MM_ANONPAGES val:22 [ 26.437355] BUG: Bad rss-counter state mm:00000000757fe5a8 type:MM_FILEPAGES val:33 [ 26.438473] BUG: Bad rss-counter state mm:00000000757fe5a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62279' (ECDSA) to the list of known hosts. 2023/06/20 11:43:59 fuzzer started 2023/06/20 11:43:59 dialing manager at localhost:36067 2023/06/20 11:43:59 checking machine... 2023/06/20 11:43:59 checking revisions... [ 27.157905] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:43:59 testing simple program... [ 27.200534] cgroup: Unknown subsys name 'net' [ 27.258073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:58 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88801c9af730 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000070006 R12=ffff8880087b83c0 R13=ffff8880087b3b40 R14=ffffea0000683200 R15=0000000080070005 RIP=ffffffff8180f135 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 00007f083e3f1900 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=00007f083e9a6650 CR3=000000000d868000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007fffcb6a07f8 CR3=0000000005482000 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=00007f4567aa45100000560dc6cbb790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000