syzkaller login: [ 31.273189] BUG: Bad rss-counter state mm:000000008104b632 type:MM_FILEPAGES val:33 [ 31.274368] BUG: Bad rss-counter state mm:000000008104b632 type:MM_ANONPAGES val:22 [ 31.442038] ================================================================== [ 31.443133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.444255] Read of size 8 at addr ffff888008ed83f8 by task sshd/220 [ 31.445323] [ 31.445586] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.446605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.447836] Call Trace: [ 31.448249] [ 31.448584] dump_stack_lvl+0x91/0xf0 [ 31.449179] print_report+0xcc/0x620 [ 31.449753] ? __virt_addr_valid+0x102/0x340 [ 31.450401] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.451128] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.451853] kasan_report+0xbe/0xf0 [ 31.452430] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.453158] vma_interval_tree_remove+0xc75/0xec0 [ 31.453865] vma_prepare+0xc54/0x11a0 [ 31.454430] __split_vma+0x5af/0x950 [ 31.454988] ? __pfx___split_vma+0x10/0x10 [ 31.455607] ? find_held_lock+0x2c/0x110 [ 31.456248] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.456919] ? lock_is_held_type+0x9f/0x120 [ 31.457472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.458091] ? mtree_range_walk+0x632/0x900 [ 31.458643] ? mas_walk+0x5c7/0x7c0 [ 31.459119] do_vmi_munmap+0x1f1/0x2b0 [ 31.459616] mmap_region+0x1f9/0x2660 [ 31.460092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.460627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.461362] ? __pfx_lock_acquire+0x10/0x10 [ 31.461893] ? __pfx_mmap_region+0x10/0x10 [ 31.462416] ? security_mmap_addr+0x7d/0xa0 [ 31.462943] ? get_unmapped_area+0x1f5/0x3f0 [ 31.463486] do_mmap+0x854/0xf00 [ 31.463925] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.464430] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.464999] ksys_mmap_pgoff+0x3af/0x500 [ 31.465504] do_syscall_64+0x3f/0x90 [ 31.465987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.466626] RIP: 0033:0x7f16312fcd82 [ 31.467080] 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 [ 31.469218] RSP: 002b:00007ffd1e2b5478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.470124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16312fcd82 [ 31.470972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1630736000 [ 31.471820] RBP: 00007f1630736000 R08: 0000000000000009 R09: 0000000000001000 [ 31.472674] R10: 0000000000000812 R11: 0000000000000206 R12: 000056293aeb0ec0 [ 31.473514] R13: 00007ffd1e2b5490 R14: 00007ffd1e2b54c0 R15: 00007ffd1e2b5820 [ 31.474364] [ 31.474654] [ 31.474870] Allocated by task 213: [ 31.475305] kasan_save_stack+0x22/0x50 [ 31.475803] kasan_set_track+0x25/0x30 [ 31.476304] __kasan_slab_alloc+0x59/0x70 [ 31.476828] kmem_cache_alloc+0x16b/0x370 [ 31.477334] vm_area_dup+0x20/0x160 [ 31.477802] __split_vma+0x170/0x950 [ 31.478271] split_vma+0xc6/0x110 [ 31.478712] mprotect_fixup+0x8d2/0xb30 [ 31.479217] do_mprotect_pkey+0x87e/0xd40 [ 31.479743] __x64_sys_mprotect+0x78/0xc0 [ 31.480276] do_syscall_64+0x3f/0x90 [ 31.480755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.481410] [ 31.481624] Freed by task 213: [ 31.482023] kasan_save_stack+0x22/0x50 [ 31.482532] kasan_set_track+0x25/0x30 [ 31.483042] kasan_save_free_info+0x2b/0x50 [ 31.483568] __kasan_slab_free+0x10a/0x190 [ 31.484114] kmem_cache_free+0x10d/0x4d0 [ 31.484626] rcu_core+0x8c8/0x2860 [ 31.485078] __do_softirq+0x1b7/0x7d4 [ 31.485561] [ 31.485776] Last potentially related work creation: [ 31.486455] kasan_save_stack+0x22/0x50 [ 31.486958] __kasan_record_aux_stack+0x8e/0xa0 [ 31.487535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.488200] remove_vma+0x139/0x170 [ 31.488652] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.489210] do_vmi_munmap+0x1f1/0x2b0 [ 31.489691] __vm_munmap+0x138/0x3a0 [ 31.490163] __x64_sys_munmap+0x59/0x80 [ 31.490654] do_syscall_64+0x3f/0x90 [ 31.491127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.491767] [ 31.491984] The buggy address belongs to the object at ffff888008ed83a0 [ 31.491984] which belongs to the cache vm_area_struct of size 168 [ 31.493463] The buggy address is located 88 bytes inside of [ 31.493463] freed 168-byte region [ffff888008ed83a0, ffff888008ed8448) [ 31.494861] [ 31.495080] The buggy address belongs to the physical page: [ 31.495729] page:000000009f4f07c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ed8 [ 31.496831] memcg:ffff88800e1a8801 [ 31.497259] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.497957] page_type: 0xffffffff() [ 31.498415] raw: 0100000000000200 ffff8880087a0c80 ffffea0000327ac0 dead000000000005 [ 31.499332] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1a8801 [ 31.500326] page dumped because: kasan: bad access detected [ 31.500991] [ 31.501206] Memory state around the buggy address: [ 31.501784] ffff888008ed8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.502641] ffff888008ed8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.503497] >ffff888008ed8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.504352] ^ [ 31.505208] ffff888008ed8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.506058] ffff888008ed8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.506919] ================================================================== [ 31.507859] Disabling lock debugging due to kernel taint [ 33.587187] BUG: Bad rss-counter state mm:0000000058358a17 type:MM_FILEPAGES val:33 [ 33.588410] BUG: Bad rss-counter state mm:0000000058358a17 type:MM_ANONPAGES val:22 [ 33.998860] BUG: Bad rss-counter state mm:00000000f7e93a34 type:MM_FILEPAGES val:33 [ 34.000069] BUG: Bad rss-counter state mm:00000000f7e93a34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39117' (ECDSA) to the list of known hosts. 2023/06/21 07:09:19 fuzzer started 2023/06/21 07:09:20 dialing manager at localhost:36067 2023/06/21 07:09:20 checking machine... 2023/06/21 07:09:20 checking revisions... [ 34.749363] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:09:20 testing simple program... [ 34.803666] cgroup: Unknown subsys name 'net' [ 34.845557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:09:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff8880146f8000 RSI=ffffffff844b7c4c RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800fcd7d68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800fcd7e70 R14=ffffffffffffffff R15=1ffff11001f9afaf RIP=ffffffff814c089b RFL=00000246 [---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 00007f1a9d967900 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=00007f1a9d91b01c CR3=000000001456a000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffef6d4faf8 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=00007fd1c708e510000055deed0ee790 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