syzkaller login: [ 30.169323] BUG: Bad rss-counter state mm:00000000fc6ddfd0 type:MM_FILEPAGES val:33 [ 30.170532] BUG: Bad rss-counter state mm:00000000fc6ddfd0 type:MM_ANONPAGES val:22 [ 30.217596] ================================================================== [ 30.218594] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.219837] Read of size 8 at addr ffff88800f75f798 by task sshd/221 [ 30.220665] [ 30.220897] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.221835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.222889] Call Trace: [ 30.223231] [ 30.223534] dump_stack_lvl+0x91/0xf0 [ 30.224059] print_report+0xcc/0x620 [ 30.224579] ? __virt_addr_valid+0x102/0x340 [ 30.225179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.225838] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.226522] kasan_report+0xbe/0xf0 [ 30.227039] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.227724] vma_interval_tree_remove+0xc75/0xec0 [ 30.228398] vma_prepare+0xc54/0x11a0 [ 30.228924] __split_vma+0x5af/0x950 [ 30.229452] ? __pfx___split_vma+0x10/0x10 [ 30.230040] ? find_held_lock+0x2c/0x110 [ 30.230631] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.231258] ? lock_is_held_type+0x9f/0x120 [ 30.231856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.232526] ? mtree_range_walk+0x632/0x900 [ 30.233142] ? mas_walk+0x5c7/0x7c0 [ 30.233668] do_vmi_munmap+0x1f1/0x2b0 [ 30.234214] mmap_region+0x1f9/0x2660 [ 30.234753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.235315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.236113] ? __pfx_lock_acquire+0x10/0x10 [ 30.236696] ? __pfx_mmap_region+0x10/0x10 [ 30.237290] ? security_mmap_addr+0x7d/0xa0 [ 30.237879] ? get_unmapped_area+0x1f5/0x3f0 [ 30.238493] do_mmap+0x854/0xf00 [ 30.239005] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.239550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.240178] ksys_mmap_pgoff+0x3af/0x500 [ 30.240749] do_syscall_64+0x3f/0x90 [ 30.241285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.242005] RIP: 0033:0x7f3735161d82 [ 30.242522] 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 [ 30.244900] RSP: 002b:00007ffd7903e8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.245911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3735161d82 [ 30.246881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f373459b000 [ 30.247824] RBP: 00007f373459b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.248769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df7797aec0 [ 30.249716] R13: 00007ffd7903e900 R14: 00007ffd7903e930 R15: 00007ffd7903ec90 [ 30.250681] [ 30.251010] [ 30.251245] Allocated by task 214: [ 30.251722] kasan_save_stack+0x22/0x50 [ 30.252287] kasan_set_track+0x25/0x30 [ 30.252836] __kasan_slab_alloc+0x59/0x70 [ 30.253420] kmem_cache_alloc+0x16b/0x370 [ 30.253996] vm_area_dup+0x20/0x160 [ 30.254512] __split_vma+0x170/0x950 [ 30.255029] split_vma+0xc6/0x110 [ 30.255513] mprotect_fixup+0x8d2/0xb30 [ 30.256076] do_mprotect_pkey+0x87e/0xd40 [ 30.256650] __x64_sys_mprotect+0x78/0xc0 [ 30.257233] do_syscall_64+0x3f/0x90 [ 30.257760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.258478] [ 30.258736] Freed by task 210: [ 30.259170] kasan_save_stack+0x22/0x50 [ 30.259726] kasan_set_track+0x25/0x30 [ 30.260275] kasan_save_free_info+0x2b/0x50 [ 30.260866] __kasan_slab_free+0x10a/0x190 [ 30.261457] kmem_cache_free+0x10d/0x4d0 [ 30.262019] rcu_core+0x8c8/0x2860 [ 30.262525] __do_softirq+0x1b7/0x7d4 [ 30.263103] [ 30.263344] Last potentially related work creation: [ 30.263993] kasan_save_stack+0x22/0x50 [ 30.264551] __kasan_record_aux_stack+0x8e/0xa0 [ 30.265194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.265905] remove_vma+0x139/0x170 [ 30.266405] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.267035] do_vmi_munmap+0x1f1/0x2b0 [ 30.267579] __vm_munmap+0x138/0x3a0 [ 30.268101] __x64_sys_munmap+0x59/0x80 [ 30.268653] do_syscall_64+0x3f/0x90 [ 30.269183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.269898] [ 30.270137] The buggy address belongs to the object at ffff88800f75f740 [ 30.270137] which belongs to the cache vm_area_struct of size 168 [ 30.271791] The buggy address is located 88 bytes inside of [ 30.271791] freed 168-byte region [ffff88800f75f740, ffff88800f75f7e8) [ 30.273358] [ 30.273596] The buggy address belongs to the physical page: [ 30.274329] page:0000000079656328 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf75f [ 30.275544] memcg:ffff88800fe47b01 [ 30.276018] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.276736] page_type: 0xffffffff() [ 30.277241] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.278271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe47b01 [ 30.279301] page dumped because: kasan: bad access detected [ 30.280040] [ 30.280280] Memory state around the buggy address: [ 30.280926] ffff88800f75f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.281881] ffff88800f75f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.282848] >ffff88800f75f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.283803] ^ [ 30.284349] ffff88800f75f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.285307] ffff88800f75f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.286255] ================================================================== [ 30.287287] Disabling lock debugging due to kernel taint [ 32.482890] BUG: Bad rss-counter state mm:000000009c6c6d60 type:MM_FILEPAGES val:33 [ 32.483934] BUG: Bad rss-counter state mm:000000009c6c6d60 type:MM_ANONPAGES val:22 [ 32.889362] BUG: Bad rss-counter state mm:000000007d6aba5c type:MM_FILEPAGES val:33 [ 32.890694] BUG: Bad rss-counter state mm:000000007d6aba5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22891' (ECDSA) to the list of known hosts. 2023/06/21 05:25:18 fuzzer started 2023/06/21 05:25:18 dialing manager at localhost:36067 2023/06/21 05:25:18 checking machine... 2023/06/21 05:25:18 checking revisions... [ 33.621524] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:25:18 testing simple program... [ 33.676313] cgroup: Unknown subsys name 'net' [ 33.722621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:17 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=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f65caa59600 CR3=000000000ff8a000 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=2037313a35323a3530203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a323338393520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a35323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009a6f428 RCX=ffffffff83ab1913 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801671f4f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000091700000917 R12=0000000000000000 R13=0000000000000085 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0408 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 00007f768b10d900 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=00007f768b6c4618 CR3=000000000edfe000 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