syzkaller login: [ 30.201772] BUG: Bad rss-counter state mm:00000000585f891a type:MM_FILEPAGES val:33 [ 30.203309] BUG: Bad rss-counter state mm:00000000585f891a type:MM_ANONPAGES val:22 [ 30.361886] ================================================================== [ 30.362877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.363936] Read of size 8 at addr ffff88800f209798 by task sshd/219 [ 30.364872] [ 30.365107] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.366040] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.367098] Call Trace: [ 30.367441] [ 30.367751] dump_stack_lvl+0x91/0xf0 [ 30.368295] print_report+0xcc/0x620 [ 30.368814] ? __virt_addr_valid+0x102/0x340 [ 30.369412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.370082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.370744] kasan_report+0xbe/0xf0 [ 30.371289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.372030] vma_interval_tree_remove+0xc75/0xec0 [ 30.372731] vma_prepare+0xc54/0x11a0 [ 30.373282] __split_vma+0x5af/0x950 [ 30.373831] ? __pfx___split_vma+0x10/0x10 [ 30.374436] ? find_held_lock+0x2c/0x110 [ 30.375039] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.375688] ? lock_is_held_type+0x9f/0x120 [ 30.376340] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.377034] ? mtree_range_walk+0x632/0x900 [ 30.377665] ? mas_walk+0x5c7/0x7c0 [ 30.378216] do_vmi_munmap+0x1f1/0x2b0 [ 30.378776] mmap_region+0x1f9/0x2660 [ 30.379333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.379930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.380725] ? __pfx_lock_acquire+0x10/0x10 [ 30.381328] ? __pfx_mmap_region+0x10/0x10 [ 30.381918] ? security_mmap_addr+0x7d/0xa0 [ 30.382509] ? get_unmapped_area+0x1f5/0x3f0 [ 30.383116] do_mmap+0x854/0xf00 [ 30.383600] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.384166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.384788] ksys_mmap_pgoff+0x3af/0x500 [ 30.385349] do_syscall_64+0x3f/0x90 [ 30.385876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386592] RIP: 0033:0x7fe6c1881d82 [ 30.387099] 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 [ 30.389491] RSP: 002b:00007ffc4b43e8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.390503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6c1881d82 [ 30.391445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6c0cbb000 [ 30.392391] RBP: 00007fe6c0cbb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.393340] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7fde10ec0 [ 30.394282] R13: 00007ffc4b43e8e0 R14: 00007ffc4b43e910 R15: 00007ffc4b43ec70 [ 30.395235] [ 30.395558] [ 30.395795] Allocated by task 212: [ 30.396293] kasan_save_stack+0x22/0x50 [ 30.396851] kasan_set_track+0x25/0x30 [ 30.397400] __kasan_slab_alloc+0x59/0x70 [ 30.397988] kmem_cache_alloc+0x16b/0x370 [ 30.398559] vm_area_dup+0x20/0x160 [ 30.399061] __split_vma+0x170/0x950 [ 30.399585] split_vma+0xc6/0x110 [ 30.400083] mprotect_fixup+0x8d2/0xb30 [ 30.400639] do_mprotect_pkey+0x87e/0xd40 [ 30.401222] __x64_sys_mprotect+0x78/0xc0 [ 30.401802] do_syscall_64+0x3f/0x90 [ 30.402333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.403049] [ 30.403286] Freed by task 202: [ 30.403720] kasan_save_stack+0x22/0x50 [ 30.404282] kasan_set_track+0x25/0x30 [ 30.404837] kasan_save_free_info+0x2b/0x50 [ 30.405425] __kasan_slab_free+0x10a/0x190 [ 30.406042] kmem_cache_free+0x10d/0x4d0 [ 30.406612] rcu_core+0x8c8/0x2860 [ 30.407104] __do_softirq+0x1b7/0x7d4 [ 30.407635] [ 30.407889] Last potentially related work creation: [ 30.408543] kasan_save_stack+0x22/0x50 [ 30.409102] __kasan_record_aux_stack+0x8e/0xa0 [ 30.409745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.410459] remove_vma+0x139/0x170 [ 30.410959] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.411576] do_vmi_munmap+0x1f1/0x2b0 [ 30.412127] __vm_munmap+0x138/0x3a0 [ 30.412644] __x64_sys_munmap+0x59/0x80 [ 30.413195] do_syscall_64+0x3f/0x90 [ 30.413722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.414439] [ 30.414675] The buggy address belongs to the object at ffff88800f209740 [ 30.414675] which belongs to the cache vm_area_struct of size 168 [ 30.416326] The buggy address is located 88 bytes inside of [ 30.416326] freed 168-byte region [ffff88800f209740, ffff88800f2097e8) [ 30.417885] [ 30.418122] The buggy address belongs to the physical page: [ 30.418856] page:0000000062d50c1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf209 [ 30.420071] memcg:ffff8880169dbf01 [ 30.420545] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.421260] page_type: 0xffffffff() [ 30.421760] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.422786] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169dbf01 [ 30.423797] page dumped because: kasan: bad access detected [ 30.424552] [ 30.424788] Memory state around the buggy address: [ 30.425431] ffff88800f209680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.426380] ffff88800f209700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.427332] >ffff88800f209780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.428286] ^ [ 30.428835] ffff88800f209800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.429787] ffff88800f209880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.430735] ================================================================== [ 30.431874] Disabling lock debugging due to kernel taint [ 32.498910] BUG: Bad rss-counter state mm:00000000badc82a1 type:MM_FILEPAGES val:33 [ 32.499723] BUG: Bad rss-counter state mm:00000000badc82a1 type:MM_ANONPAGES val:22 [ 32.987365] BUG: Bad rss-counter state mm:00000000b1f556a5 type:MM_FILEPAGES val:33 [ 32.988806] BUG: Bad rss-counter state mm:00000000b1f556a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37076' (ECDSA) to the list of known hosts. 2023/06/20 18:29:10 fuzzer started 2023/06/20 18:29:10 dialing manager at localhost:36067 2023/06/20 18:29:10 checking machine... 2023/06/20 18:29:10 checking revisions... [ 33.683407] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:29:11 testing simple program... [ 33.722643] cgroup: Unknown subsys name 'net' [ 33.782707] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:10 Registers: info registers vcpu 0 RAX=ffffea000037c900 RBX=ffff88800df24130 RCX=ffff88800844f780 RDX=ffff88808df24130 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff8880102dfc78 R8 =ffff88800df24130 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff8880102dfcb8 R14=0000000000000000 R15=ffff88800e9ff000 RIP=ffffffff81810393 RFL=00000286 [--S--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 00007fa19ab0f8c0 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=00007ff993313650 CR3=000000000e4f8000 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=000055f4df7b0490000055f4df7a0c40 XMM01=00000008ffffffff000055f4df7b0490 XMM02=000055f4df7b4db0ffffffff00000003 XMM03=000055f4df7bcc80000055f4df7adc10 XMM04=00000000ffffffff000055f4df7bcc80 XMM05=000055f4df7adbf0000055f4df7b4db0 XMM06=000055f4df7b4d900000000000000000 XMM07=0000000300000004000055f4df7b4530 XMM08=20202020203a657a697320656c696600 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=00007ffdc98cdcc8 CR3=0000000016a76000 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=2030313a39323a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000