syzkaller login: [ 31.284180] BUG: Bad rss-counter state mm:00000000f525024f type:MM_FILEPAGES val:33 [ 31.285299] BUG: Bad rss-counter state mm:00000000f525024f type:MM_ANONPAGES val:22 [ 31.327872] ================================================================== [ 31.328848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.329871] Read of size 8 at addr ffff8880199caed8 by task sshd/220 [ 31.330710] [ 31.330950] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.331935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.332989] Call Trace: [ 31.333353] [ 31.333679] dump_stack_lvl+0x91/0xf0 [ 31.334428] print_report+0xcc/0x620 [ 31.334973] ? __virt_addr_valid+0x102/0x340 [ 31.335613] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337022] kasan_report+0xbe/0xf0 [ 31.337547] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338240] vma_interval_tree_remove+0xc75/0xec0 [ 31.338889] vma_prepare+0xc54/0x11a0 [ 31.339417] __split_vma+0x5af/0x950 [ 31.339950] ? __pfx___split_vma+0x10/0x10 [ 31.340541] ? find_held_lock+0x2c/0x110 [ 31.341127] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.341747] ? lock_is_held_type+0x9f/0x120 [ 31.342344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.343031] ? mtree_range_walk+0x632/0x900 [ 31.343624] ? mas_walk+0x5c7/0x7c0 [ 31.344168] do_vmi_munmap+0x1f1/0x2b0 [ 31.344702] mmap_region+0x1f9/0x2660 [ 31.345241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.345803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.346607] ? __pfx_lock_acquire+0x10/0x10 [ 31.347210] ? __pfx_mmap_region+0x10/0x10 [ 31.347799] ? security_mmap_addr+0x7d/0xa0 [ 31.348407] ? get_unmapped_area+0x1f5/0x3f0 [ 31.349037] do_mmap+0x854/0xf00 [ 31.349519] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.350081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.350728] ksys_mmap_pgoff+0x3af/0x500 [ 31.351278] do_syscall_64+0x3f/0x90 [ 31.351828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.352562] RIP: 0033:0x7f100069ad82 [ 31.353087] 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 [ 31.355455] RSP: 002b:00007ffcf26a69a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.356471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f100069ad82 [ 31.357389] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fffad4000 [ 31.358334] RBP: 00007f0fffad4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.359267] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a71ebed90 [ 31.360218] R13: 00007ffcf26a69c0 R14: 00007ffcf26a69f0 R15: 00007ffcf26a6d50 [ 31.361151] [ 31.361471] [ 31.361700] Allocated by task 213: [ 31.362155] kasan_save_stack+0x22/0x50 [ 31.362692] kasan_set_track+0x25/0x30 [ 31.363221] __kasan_slab_alloc+0x59/0x70 [ 31.363789] kmem_cache_alloc+0x16b/0x370 [ 31.364391] vm_area_dup+0x20/0x160 [ 31.364880] __split_vma+0x170/0x950 [ 31.365391] split_vma+0xc6/0x110 [ 31.365873] mprotect_fixup+0x8d2/0xb30 [ 31.366430] do_mprotect_pkey+0x87e/0xd40 [ 31.366985] __x64_sys_mprotect+0x78/0xc0 [ 31.367560] do_syscall_64+0x3f/0x90 [ 31.368103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368797] [ 31.369038] Freed by task 213: [ 31.369454] kasan_save_stack+0x22/0x50 [ 31.369995] kasan_set_track+0x25/0x30 [ 31.370550] kasan_save_free_info+0x2b/0x50 [ 31.371099] __kasan_slab_free+0x10a/0x190 [ 31.371677] kmem_cache_free+0x10d/0x4d0 [ 31.372238] rcu_core+0x8c8/0x2860 [ 31.372712] __do_softirq+0x1b7/0x7d4 [ 31.373233] [ 31.373478] Last potentially related work creation: [ 31.374099] kasan_save_stack+0x22/0x50 [ 31.374648] __kasan_record_aux_stack+0x8e/0xa0 [ 31.375261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.375976] remove_vma+0x139/0x170 [ 31.376478] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.377077] do_vmi_munmap+0x1f1/0x2b0 [ 31.377613] __vm_munmap+0x138/0x3a0 [ 31.378115] __x64_sys_munmap+0x59/0x80 [ 31.378657] do_syscall_64+0x3f/0x90 [ 31.379151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.379883] [ 31.380110] The buggy address belongs to the object at ffff8880199cae80 [ 31.380110] which belongs to the cache vm_area_struct of size 168 [ 31.381691] The buggy address is located 88 bytes inside of [ 31.381691] freed 168-byte region [ffff8880199cae80, ffff8880199caf28) [ 31.383190] [ 31.383428] The buggy address belongs to the physical page: [ 31.384155] page:00000000abb2fee7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199ca [ 31.385343] memcg:ffff8880199a1301 [ 31.385816] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.386521] page_type: 0xffffffff() [ 31.387001] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.388182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199a1301 [ 31.389408] page dumped because: kasan: bad access detected [ 31.390305] [ 31.390600] Memory state around the buggy address: [ 31.391379] ffff8880199cad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.392584] ffff8880199cae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.393758] >ffff8880199cae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.394916] ^ [ 31.395930] ffff8880199caf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.397086] ffff8880199caf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.398246] ================================================================== [ 31.400040] Disabling lock debugging due to kernel taint [ 33.690397] BUG: Bad rss-counter state mm:00000000b872d29a type:MM_FILEPAGES val:33 [ 33.691427] BUG: Bad rss-counter state mm:00000000b872d29a type:MM_ANONPAGES val:22 [ 34.099096] BUG: Bad rss-counter state mm:00000000785debca type:MM_FILEPAGES val:33 [ 34.100130] BUG: Bad rss-counter state mm:00000000785debca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28496' (ECDSA) to the list of known hosts. 2023/06/20 13:27:02 fuzzer started 2023/06/20 13:27:02 dialing manager at localhost:36067 2023/06/20 13:27:02 checking machine... 2023/06/20 13:27:02 checking revisions... [ 34.840116] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:27:02 testing simple program... [ 34.885793] cgroup: Unknown subsys name 'net' [ 34.930244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:02 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=0000000000000001 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=00007ffea32f29e8 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=00007fd9916ae5100000557bcf67c790 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=0000000000000000 RBX=0000000000008000 RCX=00007f2a045cf477 RDX=0000000000000001 RSI=0000000000000002 RDI=0000000000000008 RBP=000055738e9be350 RSP=00007ffc4dbc1fe8 R8 =000055738e9de640 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000202 R12=0000000000000008 R13=000055738e9be350 R14=0000000000000005 R15=000055738e9de640 RIP=00007f2a045bf330 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2a040dc900 00000000 00000000 GS =0000 0000000000000000 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=00007f2a046940b0 CR3=000000000c960000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000