syzkaller login: [ 23.808761] BUG: Bad rss-counter state mm:0000000076ad2608 type:MM_FILEPAGES val:33 [ 23.809921] BUG: Bad rss-counter state mm:0000000076ad2608 type:MM_ANONPAGES val:22 [ 23.856259] ================================================================== [ 23.857517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.858543] Read of size 8 at addr ffff888016c0aa50 by task sshd/219 [ 23.859402] [ 23.859647] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.860609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.861680] Call Trace: [ 23.862037] [ 23.862323] dump_stack_lvl+0x91/0xf0 [ 23.862817] print_report+0xcc/0x620 [ 23.863341] ? __virt_addr_valid+0x102/0x340 [ 23.863954] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.864647] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.865333] kasan_report+0xbe/0xf0 [ 23.865858] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.866505] vma_interval_tree_remove+0xc75/0xec0 [ 23.867133] vma_prepare+0xc54/0x11a0 [ 23.867669] __split_vma+0x5af/0x950 [ 23.868232] ? __pfx___split_vma+0x10/0x10 [ 23.868819] ? find_held_lock+0x2c/0x110 [ 23.869395] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.870029] ? lock_is_held_type+0x9f/0x120 [ 23.870572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.871204] ? mtree_range_walk+0x632/0x900 [ 23.871822] ? mas_walk+0x5c7/0x7c0 [ 23.872366] do_vmi_munmap+0x1f1/0x2b0 [ 23.872917] mmap_region+0x1f9/0x2660 [ 23.873460] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.874036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.874760] ? __pfx_lock_acquire+0x10/0x10 [ 23.875336] ? __pfx_mmap_region+0x10/0x10 [ 23.875927] ? security_mmap_addr+0x7d/0xa0 [ 23.876529] ? get_unmapped_area+0x1f5/0x3f0 [ 23.877146] do_mmap+0x854/0xf00 [ 23.877636] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.878175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.878745] ksys_mmap_pgoff+0x3af/0x500 [ 23.879258] do_syscall_64+0x3f/0x90 [ 23.879737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.880402] RIP: 0033:0x7fb7e056ed82 [ 23.880863] 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 [ 23.883033] RSP: 002b:00007fff373d8838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.883942] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7e056ed82 [ 23.884800] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7df9a8000 [ 23.885649] RBP: 00007fb7df9a8000 R08: 0000000000000009 R09: 0000000000001000 [ 23.886513] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b58704ec0 [ 23.887377] R13: 00007fff373d8850 R14: 00007fff373d8880 R15: 00007fff373d8be0 [ 23.888257] [ 23.888549] [ 23.888762] Allocated by task 212: [ 23.889199] kasan_save_stack+0x22/0x50 [ 23.889705] kasan_set_track+0x25/0x30 [ 23.890228] __kasan_slab_alloc+0x59/0x70 [ 23.890775] kmem_cache_alloc+0x16b/0x370 [ 23.891296] vm_area_dup+0x20/0x160 [ 23.891758] __split_vma+0x170/0x950 [ 23.892249] split_vma+0xc6/0x110 [ 23.892688] mprotect_fixup+0x8d2/0xb30 [ 23.893197] do_mprotect_pkey+0x87e/0xd40 [ 23.893741] __x64_sys_mprotect+0x78/0xc0 [ 23.894275] do_syscall_64+0x3f/0x90 [ 23.894757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.895436] [ 23.895657] Freed by task 203: [ 23.896081] kasan_save_stack+0x22/0x50 [ 23.896587] kasan_set_track+0x25/0x30 [ 23.897088] kasan_save_free_info+0x2b/0x50 [ 23.897622] __kasan_slab_free+0x10a/0x190 [ 23.898168] kmem_cache_free+0x10d/0x4d0 [ 23.898673] rcu_core+0x8c8/0x2860 [ 23.899131] __do_softirq+0x1b7/0x7d4 [ 23.899607] [ 23.899821] Last potentially related work creation: [ 23.900425] kasan_save_stack+0x22/0x50 [ 23.900941] __kasan_record_aux_stack+0x8e/0xa0 [ 23.901524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.902182] remove_vma+0x139/0x170 [ 23.902633] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.903196] do_vmi_munmap+0x1f1/0x2b0 [ 23.903687] __vm_munmap+0x138/0x3a0 [ 23.904165] __x64_sys_munmap+0x59/0x80 [ 23.904675] do_syscall_64+0x3f/0x90 [ 23.905155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.905807] [ 23.906030] The buggy address belongs to the object at ffff888016c0a9f8 [ 23.906030] which belongs to the cache vm_area_struct of size 168 [ 23.907513] The buggy address is located 88 bytes inside of [ 23.907513] freed 168-byte region [ffff888016c0a9f8, ffff888016c0aaa0) [ 23.908965] [ 23.909190] The buggy address belongs to the physical page: [ 23.909863] page:00000000b88a85e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c0a [ 23.910983] memcg:ffff88800ebe5b01 [ 23.911411] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.912080] page_type: 0xffffffff() [ 23.912555] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.913508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebe5b01 [ 23.914437] page dumped because: kasan: bad access detected [ 23.915109] [ 23.915329] Memory state around the buggy address: [ 23.915923] ffff888016c0a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.916799] ffff888016c0a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 23.917661] >ffff888016c0aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.918540] ^ [ 23.919250] ffff888016c0aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 23.920120] ffff888016c0ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.920986] ================================================================== [ 23.922225] Disabling lock debugging due to kernel taint [ 26.550389] BUG: Bad rss-counter state mm:00000000e2132610 type:MM_FILEPAGES val:33 [ 26.551377] BUG: Bad rss-counter state mm:00000000e2132610 type:MM_ANONPAGES val:22 [ 27.113834] BUG: Bad rss-counter state mm:00000000aa79676c type:MM_FILEPAGES val:33 [ 27.114996] BUG: Bad rss-counter state mm:00000000aa79676c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42366' (ECDSA) to the list of known hosts. 2023/06/20 19:45:10 fuzzer started 2023/06/20 19:45:11 dialing manager at localhost:36067 2023/06/20 19:45:11 checking machine... 2023/06/20 19:45:11 checking revisions... [ 27.778280] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:45:11 testing simple program... [ 27.836044] cgroup: Unknown subsys name 'net' [ 27.878022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f42fd1044e0 CR3=000000000ec42000 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=2030313a35343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35343a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff838728bb RDX=dffffc0000000000 RSI=0000000000028728 RDI=ffff888016b9f708 RBP=ffff888016b9f760 RSP=ffff888016b9f698 R8 =0000000000000001 R9 =ffff888016b9f748 R10=0000000000038001 R11=000000000008b5b9 R12=ffff888016b9f768 R13=ffff888016b9f750 R14=ffff888016b9f749 R15=ffff888016b9f708 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f16b7454900 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=00007ffe05641000 CR3=000000000f0d4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000