syzkaller login: [ 31.599911] BUG: Bad rss-counter state mm:0000000041cd5626 type:MM_FILEPAGES val:33 [ 31.601678] BUG: Bad rss-counter state mm:0000000041cd5626 type:MM_ANONPAGES val:22 [ 31.774730] ================================================================== [ 31.775885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.776949] Read of size 8 at addr ffff88800cdf8b38 by task sshd/219 [ 31.777737] [ 31.777957] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.778867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.779908] Call Trace: [ 31.780231] [ 31.780549] dump_stack_lvl+0x91/0xf0 [ 31.781051] print_report+0xcc/0x620 [ 31.781561] ? __virt_addr_valid+0x102/0x340 [ 31.782127] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.782795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.783434] kasan_report+0xbe/0xf0 [ 31.783967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.784625] vma_interval_tree_remove+0xc75/0xec0 [ 31.785264] vma_prepare+0xc54/0x11a0 [ 31.785761] __split_vma+0x5af/0x950 [ 31.786234] ? __pfx___split_vma+0x10/0x10 [ 31.786798] ? find_held_lock+0x2c/0x110 [ 31.787371] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.788144] ? lock_is_held_type+0x9f/0x120 [ 31.788871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.789682] ? mtree_range_walk+0x632/0x900 [ 31.790427] ? mas_walk+0x5c7/0x7c0 [ 31.791065] do_vmi_munmap+0x1f1/0x2b0 [ 31.791740] mmap_region+0x1f9/0x2660 [ 31.792393] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.793070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.793824] ? __pfx_lock_acquire+0x10/0x10 [ 31.794372] ? __pfx_mmap_region+0x10/0x10 [ 31.794927] ? security_mmap_addr+0x7d/0xa0 [ 31.795474] ? get_unmapped_area+0x1f5/0x3f0 [ 31.796057] do_mmap+0x854/0xf00 [ 31.796523] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.797030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.797623] ksys_mmap_pgoff+0x3af/0x500 [ 31.798137] do_syscall_64+0x3f/0x90 [ 31.798633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.799293] RIP: 0033:0x7fdcb1fe3d82 [ 31.799785] 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 [ 31.801978] RSP: 002b:00007ffd244a9ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.802925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcb1fe3d82 [ 31.803798] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcb141d000 [ 31.804684] RBP: 00007fdcb141d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.805562] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564dbbe05d90 [ 31.806431] R13: 00007ffd244a9ef0 R14: 00007ffd244a9f20 R15: 00007ffd244aa280 [ 31.807346] [ 31.807676] [ 31.807904] Allocated by task 212: [ 31.808341] kasan_save_stack+0x22/0x50 [ 31.808879] kasan_set_track+0x25/0x30 [ 31.809387] __kasan_slab_alloc+0x59/0x70 [ 31.809944] kmem_cache_alloc+0x16b/0x370 [ 31.810484] vm_area_dup+0x20/0x160 [ 31.810948] __split_vma+0x170/0x950 [ 31.811418] split_vma+0xc6/0x110 [ 31.811927] mprotect_fixup+0x8d2/0xb30 [ 31.812430] do_mprotect_pkey+0x87e/0xd40 [ 31.812984] __x64_sys_mprotect+0x78/0xc0 [ 31.813524] do_syscall_64+0x3f/0x90 [ 31.814010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.814693] [ 31.814917] Freed by task 212: [ 31.815318] kasan_save_stack+0x22/0x50 [ 31.815868] kasan_set_track+0x25/0x30 [ 31.816372] kasan_save_free_info+0x2b/0x50 [ 31.816923] __kasan_slab_free+0x10a/0x190 [ 31.817471] kmem_cache_free+0x10d/0x4d0 [ 31.817992] rcu_core+0x8c8/0x2860 [ 31.818452] __do_softirq+0x1b7/0x7d4 [ 31.818948] [ 31.819171] Last potentially related work creation: [ 31.819798] kasan_save_stack+0x22/0x50 [ 31.820325] __kasan_record_aux_stack+0x8e/0xa0 [ 31.820921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.821575] remove_vma+0x139/0x170 [ 31.822026] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.822607] do_vmi_munmap+0x1f1/0x2b0 [ 31.823098] __vm_munmap+0x138/0x3a0 [ 31.823592] __x64_sys_munmap+0x59/0x80 [ 31.824093] do_syscall_64+0x3f/0x90 [ 31.824600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825238] [ 31.825456] The buggy address belongs to the object at ffff88800cdf8ae0 [ 31.825456] which belongs to the cache vm_area_struct of size 168 [ 31.826959] The buggy address is located 88 bytes inside of [ 31.826959] freed 168-byte region [ffff88800cdf8ae0, ffff88800cdf8b88) [ 31.828398] [ 31.828633] The buggy address belongs to the physical page: [ 31.829298] page:000000004d4953f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcdf8 [ 31.830437] memcg:ffff888016e65a01 [ 31.830898] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.831587] page_type: 0xffffffff() [ 31.832043] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.832992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e65a01 [ 31.833920] page dumped because: kasan: bad access detected [ 31.834598] [ 31.834815] Memory state around the buggy address: [ 31.835402] ffff88800cdf8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.836293] ffff88800cdf8a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.837163] >ffff88800cdf8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.838035] ^ [ 31.838676] ffff88800cdf8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.839566] ffff88800cdf8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.840432] ================================================================== [ 31.841531] Disabling lock debugging due to kernel taint [ 33.814573] BUG: Bad rss-counter state mm:00000000dbfd21b2 type:MM_FILEPAGES val:33 [ 33.815861] BUG: Bad rss-counter state mm:00000000dbfd21b2 type:MM_ANONPAGES val:22 [ 34.255671] BUG: Bad rss-counter state mm:00000000ff807156 type:MM_FILEPAGES val:33 [ 34.256860] BUG: Bad rss-counter state mm:00000000ff807156 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11085' (ECDSA) to the list of known hosts. 2023/06/19 16:37:33 fuzzer started 2023/06/19 16:37:33 dialing manager at localhost:44161 2023/06/19 16:37:33 checking machine... 2023/06/19 16:37:33 checking revisions... [ 34.972577] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:37:33 testing simple program... [ 35.017202] cgroup: Unknown subsys name 'net' [ 35.057356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:37:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c139e RSP=ffff88806ce09cd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff88806ce361a0 R13=ffffffff81830685 R14=ffff88800da42280 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 00007fb046c43900 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=00007fb0460b0620 CR3=000000000e212000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c0ad7492a542df5200000000000ae988 XMM05=b0a2ef02149937ad0000000000134e38 XMM06=806171799158d9670000000000133c28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100318df30 RBX=ffffed100318df31 RCX=ffffffff8451b6ac RDX=ffffed100318df31 RSI=0000000000000008 RDI=ffff888018c6f980 RBP=ffffed100318df30 RSP=ffff888018c6f918 R8 =0000000000000001 R9 =ffffed100318df30 R10=ffff888018c6f987 R11=00000000000b6996 R12=fffffbfff0f6ce40 R13=ffffffff87b67200 R14=ffffffff87b6d3a0 R15=dffffc0000000000 RIP=ffffffff8180f009 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 00007f0f97f46900 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=00007ffc82295000 CR3=0000000009816000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000