syzkaller login: [ 30.525557] BUG: Bad rss-counter state mm:000000001c8bd2aa type:MM_FILEPAGES val:33 [ 30.526699] BUG: Bad rss-counter state mm:000000001c8bd2aa type:MM_ANONPAGES val:22 [ 30.666544] ================================================================== [ 30.667462] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.668395] Read of size 8 at addr ffff88800fcb3880 by task sshd/218 [ 30.669306] [ 30.669521] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.670385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.671397] Call Trace: [ 30.671717] [ 30.671998] dump_stack_lvl+0x91/0xf0 [ 30.672487] print_report+0xcc/0x620 [ 30.672967] ? __virt_addr_valid+0x102/0x340 [ 30.673511] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674132] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674760] kasan_report+0xbe/0xf0 [ 30.675228] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.675854] vma_interval_tree_remove+0xc75/0xec0 [ 30.676442] vma_prepare+0xc54/0x11a0 [ 30.676931] __split_vma+0x5af/0x950 [ 30.677412] ? __pfx___split_vma+0x10/0x10 [ 30.677953] ? find_held_lock+0x2c/0x110 [ 30.678481] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.679072] ? lock_is_held_type+0x9f/0x120 [ 30.679615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.680224] ? mtree_range_walk+0x632/0x900 [ 30.680783] ? mas_walk+0x5c7/0x7c0 [ 30.681270] do_vmi_munmap+0x1f1/0x2b0 [ 30.681773] mmap_region+0x1f9/0x2660 [ 30.682251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.682771] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.683479] ? __pfx_lock_acquire+0x10/0x10 [ 30.684019] ? __pfx_mmap_region+0x10/0x10 [ 30.684551] ? security_mmap_addr+0x7d/0xa0 [ 30.685081] ? get_unmapped_area+0x1f5/0x3f0 [ 30.685631] do_mmap+0x854/0xf00 [ 30.686072] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.686564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.687135] ksys_mmap_pgoff+0x3af/0x500 [ 30.687649] do_syscall_64+0x3f/0x90 [ 30.688132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688781] RIP: 0033:0x7fe9ecf83d82 [ 30.689236] 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 [ 30.691364] RSP: 002b:00007fffc0ac92f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.692275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9ecf83d82 [ 30.693112] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9ec3bd000 [ 30.693965] RBP: 00007fe9ec3bd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.694823] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da4fb74f70 [ 30.695649] R13: 00007fffc0ac9310 R14: 00007fffc0ac9340 R15: 00007fffc0ac96a0 [ 30.696500] [ 30.696796] [ 30.697008] Allocated by task 211: [ 30.697443] kasan_save_stack+0x22/0x50 [ 30.697954] kasan_set_track+0x25/0x30 [ 30.698450] __kasan_slab_alloc+0x59/0x70 [ 30.698999] kmem_cache_alloc+0x16b/0x370 [ 30.699523] vm_area_dup+0x20/0x160 [ 30.699984] __split_vma+0x170/0x950 [ 30.700454] split_vma+0xc6/0x110 [ 30.700899] mprotect_fixup+0x8d2/0xb30 [ 30.701402] do_mprotect_pkey+0x87e/0xd40 [ 30.701923] __x64_sys_mprotect+0x78/0xc0 [ 30.702442] do_syscall_64+0x3f/0x90 [ 30.702928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703576] [ 30.703791] Freed by task 202: [ 30.704187] kasan_save_stack+0x22/0x50 [ 30.704689] kasan_set_track+0x25/0x30 [ 30.705189] kasan_save_free_info+0x2b/0x50 [ 30.705728] __kasan_slab_free+0x10a/0x190 [ 30.706262] kmem_cache_free+0x10d/0x4d0 [ 30.706777] rcu_core+0x8c8/0x2860 [ 30.707212] __do_softirq+0x1b7/0x7d4 [ 30.707693] [ 30.707910] Last potentially related work creation: [ 30.708490] kasan_save_stack+0x22/0x50 [ 30.708991] __kasan_record_aux_stack+0x8e/0xa0 [ 30.709624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.710273] remove_vma+0x139/0x170 [ 30.710737] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.711302] do_vmi_munmap+0x1f1/0x2b0 [ 30.711791] __vm_munmap+0x138/0x3a0 [ 30.712256] __x64_sys_munmap+0x59/0x80 [ 30.712755] do_syscall_64+0x3f/0x90 [ 30.713221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.713860] [ 30.714076] The buggy address belongs to the object at ffff88800fcb3828 [ 30.714076] which belongs to the cache vm_area_struct of size 168 [ 30.715549] The buggy address is located 88 bytes inside of [ 30.715549] freed 168-byte region [ffff88800fcb3828, ffff88800fcb38d0) [ 30.716938] [ 30.717155] The buggy address belongs to the physical page: [ 30.717822] page:00000000278bc3ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcb3 [ 30.718914] memcg:ffff88800c9e8301 [ 30.719340] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.719987] page_type: 0xffffffff() [ 30.720429] raw: 0100000000000200 ffff8880087a0c80 ffffea0000603680 dead000000000004 [ 30.721352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9e8301 [ 30.722258] page dumped because: kasan: bad access detected [ 30.722935] [ 30.723153] Memory state around the buggy address: [ 30.723733] ffff88800fcb3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.724580] ffff88800fcb3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.725432] >ffff88800fcb3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.726288] ^ [ 30.726730] ffff88800fcb3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.727594] ffff88800fcb3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.728441] ================================================================== [ 30.729365] Disabling lock debugging due to kernel taint [ 33.216101] BUG: Bad rss-counter state mm:00000000f7ff6afc type:MM_FILEPAGES val:33 [ 33.217302] BUG: Bad rss-counter state mm:00000000f7ff6afc type:MM_ANONPAGES val:22 [ 33.617517] BUG: Bad rss-counter state mm:00000000e666a165 type:MM_FILEPAGES val:33 [ 33.618539] BUG: Bad rss-counter state mm:00000000e666a165 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31683' (ECDSA) to the list of known hosts. 2023/06/20 11:01:07 fuzzer started 2023/06/20 11:01:07 dialing manager at localhost:36067 2023/06/20 11:01:07 checking machine... 2023/06/20 11:01:07 checking revisions... [ 34.343887] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:01:07 testing simple program... [ 34.400558] cgroup: Unknown subsys name 'net' [ 34.457437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:01:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff818ea141 RDX=ffff8880159a8000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000003 RSP=ffff888016e17d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=ffff88800cb86280 R13=ffff88800e3029a0 R14=ffff88800cb862d8 R15=0000000000000002 RIP=ffffffff814c027c 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4581194700 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=00007fab91dcc0b0 CR3=0000000016dc0000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732036303a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363035 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f244fd7b020 CR3=0000000009a64000 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=c7ef7d90eb18eca8e74a29ab7d532e93 XMM02=ec2efd57dc4c00df000000000011b628 XMM03=0cc94cda3d0cced2000000000011b6f8 XMM04=aac9bf7c1a4dd8a500000000000ae988 XMM05=751b9502027dc0b900000000001317a8 XMM06=b97ee4a6950b6dac0000000000130980 XMM07=e042d86d42eb936e0000000000121c20 XMM08=0cc94cda3d0cced2000000000011b6f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000