syzkaller login: [ 43.677558] BUG: Bad rss-counter state mm:0000000009a67df4 type:MM_FILEPAGES val:33 [ 43.678605] BUG: Bad rss-counter state mm:0000000009a67df4 type:MM_ANONPAGES val:22 [ 43.863408] ================================================================== [ 43.864303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.865242] Read of size 8 at addr ffff88800ef7d310 by task sshd/224 [ 43.866014] [ 43.866231] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.867236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.868423] Call Trace: [ 43.868830] [ 43.869176] dump_stack_lvl+0x91/0xf0 [ 43.869768] print_report+0xcc/0x620 [ 43.870360] ? __virt_addr_valid+0x102/0x340 [ 43.871065] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.871683] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.872289] kasan_report+0xbe/0xf0 [ 43.872772] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.873386] vma_interval_tree_remove+0xc75/0xec0 [ 43.874001] vma_prepare+0xc54/0x11a0 [ 43.874487] __split_vma+0x5af/0x950 [ 43.874965] ? __pfx___split_vma+0x10/0x10 [ 43.875498] ? find_held_lock+0x2c/0x110 [ 43.876017] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.876582] ? lock_is_held_type+0x9f/0x120 [ 43.877117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.877721] ? mtree_range_walk+0x632/0x900 [ 43.878275] ? mas_walk+0x5c7/0x7c0 [ 43.878768] do_vmi_munmap+0x1f1/0x2b0 [ 43.879261] mmap_region+0x1f9/0x2660 [ 43.879747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.880255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.880966] ? __pfx_lock_acquire+0x10/0x10 [ 43.881499] ? __pfx_mmap_region+0x10/0x10 [ 43.882022] ? security_mmap_addr+0x7d/0xa0 [ 43.882564] ? get_unmapped_area+0x1f5/0x3f0 [ 43.883114] do_mmap+0x854/0xf00 [ 43.883549] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.884040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.884595] ksys_mmap_pgoff+0x3af/0x500 [ 43.885098] do_syscall_64+0x3f/0x90 [ 43.885578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.886224] RIP: 0033:0x7fc679309d82 [ 43.886697] 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 [ 43.888821] RSP: 002b:00007ffcadfc60c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.889726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc679309d82 [ 43.890585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc678743000 [ 43.891433] RBP: 00007fc678743000 R08: 0000000000000009 R09: 0000000000001000 [ 43.892281] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1b3458b20 [ 43.893142] R13: 00007ffcadfc60e0 R14: 00007ffcadfc6110 R15: 00007ffcadfc6470 [ 43.894007] [ 43.894304] [ 43.894532] Allocated by task 213: [ 43.894966] kasan_save_stack+0x22/0x50 [ 43.895476] kasan_set_track+0x25/0x30 [ 43.895976] __kasan_slab_alloc+0x59/0x70 [ 43.896511] kmem_cache_alloc+0x16b/0x370 [ 43.897029] vm_area_dup+0x20/0x160 [ 43.897483] __split_vma+0x170/0x950 [ 43.897943] split_vma+0xc6/0x110 [ 43.898376] mprotect_fixup+0x8d2/0xb30 [ 43.898880] do_mprotect_pkey+0x87e/0xd40 [ 43.899404] __x64_sys_mprotect+0x78/0xc0 [ 43.899927] do_syscall_64+0x3f/0x90 [ 43.900402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.901037] [ 43.901253] Freed by task 213: [ 43.901641] kasan_save_stack+0x22/0x50 [ 43.902151] kasan_set_track+0x25/0x30 [ 43.902661] kasan_save_free_info+0x2b/0x50 [ 43.903189] __kasan_slab_free+0x10a/0x190 [ 43.903719] kmem_cache_free+0x10d/0x4d0 [ 43.904233] rcu_core+0x8c8/0x2860 [ 43.904673] __do_softirq+0x1b7/0x7d4 [ 43.905148] [ 43.905363] Last potentially related work creation: [ 43.905952] kasan_save_stack+0x22/0x50 [ 43.906457] __kasan_record_aux_stack+0x8e/0xa0 [ 43.907043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.907684] remove_vma+0x139/0x170 [ 43.908138] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.908696] do_vmi_munmap+0x1f1/0x2b0 [ 43.909180] __vm_munmap+0x138/0x3a0 [ 43.909642] __x64_sys_munmap+0x59/0x80 [ 43.910137] do_syscall_64+0x3f/0x90 [ 43.910627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.911263] [ 43.911476] The buggy address belongs to the object at ffff88800ef7d2b8 [ 43.911476] which belongs to the cache vm_area_struct of size 168 [ 43.912942] The buggy address is located 88 bytes inside of [ 43.912942] freed 168-byte region [ffff88800ef7d2b8, ffff88800ef7d360) [ 43.914350] [ 43.914579] The buggy address belongs to the physical page: [ 43.915230] page:00000000a073b7c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef7d [ 43.916317] memcg:ffff888009642a01 [ 43.916740] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.917379] page_type: 0xffffffff() [ 43.917833] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.918750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009642a01 [ 43.919653] page dumped because: kasan: bad access detected [ 43.920308] [ 43.920522] Memory state around the buggy address: [ 43.921098] ffff88800ef7d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.921946] ffff88800ef7d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.922869] >ffff88800ef7d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.923742] ^ [ 43.924210] ffff88800ef7d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.925061] ffff88800ef7d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.925915] ================================================================== [ 43.926923] Disabling lock debugging due to kernel taint [ 45.671044] BUG: Bad rss-counter state mm:0000000026535670 type:MM_FILEPAGES val:33 [ 45.672566] BUG: Bad rss-counter state mm:0000000026535670 type:MM_ANONPAGES val:22 [ 46.172024] BUG: Bad rss-counter state mm:00000000c7167ed3 type:MM_FILEPAGES val:33 [ 46.173002] BUG: Bad rss-counter state mm:00000000c7167ed3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3725' (ECDSA) to the list of known hosts. 2023/06/19 17:52:42 fuzzer started 2023/06/19 17:52:42 dialing manager at localhost:44161 2023/06/19 17:52:42 checking machine... 2023/06/19 17:52:42 checking revisions... [ 46.896081] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:52:42 testing simple program... [ 46.940125] cgroup: Unknown subsys name 'net' [ 46.977646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc10b5f958 CR3=0000000005482000 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=00007f906fae7510000055dc2b25d790 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 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff856d8220 RCX=ffffffff812e00d6 RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffff88801baf7c48 RBP=1ffff1100375ef85 RSP=ffff88801baf7c18 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=ffffffff856d8228 R13=ffffffff856d8230 R14=ffff88800f734c28 R15=ffff88800f734be0 RIP=ffffffff8180fd50 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 00007fa0ed7d7900 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=00007fa0edd8e618 CR3=00000000143d4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000