syzkaller login: [ 32.240824] BUG: Bad rss-counter state mm:000000004425007d type:MM_FILEPAGES val:33 [ 32.242067] BUG: Bad rss-counter state mm:000000004425007d type:MM_ANONPAGES val:22 [ 32.336193] ================================================================== [ 32.337253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.338337] Read of size 8 at addr ffff88800dff0228 by task sshd/219 [ 32.339299] [ 32.339510] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.340354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.341310] Call Trace: [ 32.341620] [ 32.341896] dump_stack_lvl+0x91/0xf0 [ 32.342377] print_report+0xcc/0x620 [ 32.342847] ? __virt_addr_valid+0x102/0x340 [ 32.343379] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.343982] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.344603] kasan_report+0xbe/0xf0 [ 32.345071] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.345677] vma_interval_tree_remove+0xc75/0xec0 [ 32.346265] vma_prepare+0xc54/0x11a0 [ 32.346730] __split_vma+0x5af/0x950 [ 32.347200] ? __pfx___split_vma+0x10/0x10 [ 32.347715] ? find_held_lock+0x2c/0x110 [ 32.348222] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.348797] ? lock_is_held_type+0x9f/0x120 [ 32.349320] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.349911] ? mtree_range_walk+0x632/0x900 [ 32.350452] ? mas_walk+0x5c7/0x7c0 [ 32.350919] do_vmi_munmap+0x1f1/0x2b0 [ 32.351400] mmap_region+0x1f9/0x2660 [ 32.351877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.352386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.353079] ? __pfx_lock_acquire+0x10/0x10 [ 32.353597] ? __pfx_mmap_region+0x10/0x10 [ 32.354113] ? security_mmap_addr+0x7d/0xa0 [ 32.354634] ? get_unmapped_area+0x1f5/0x3f0 [ 32.355171] do_mmap+0x854/0xf00 [ 32.355600] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.356081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.356641] ksys_mmap_pgoff+0x3af/0x500 [ 32.357137] do_syscall_64+0x3f/0x90 [ 32.357608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.358243] RIP: 0033:0x7fd91129cd82 [ 32.358685] 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 [ 32.360784] RSP: 002b:00007ffc8ccddd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.361677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd91129cd82 [ 32.362517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9106d6000 [ 32.363343] RBP: 00007fd9106d6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.364171] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566172cbec0 [ 32.365005] R13: 00007ffc8ccddd80 R14: 00007ffc8ccdddb0 R15: 00007ffc8ccde110 [ 32.365846] [ 32.366132] [ 32.366343] Allocated by task 212: [ 32.366761] kasan_save_stack+0x22/0x50 [ 32.367255] kasan_set_track+0x25/0x30 [ 32.367736] __kasan_slab_alloc+0x59/0x70 [ 32.368250] kmem_cache_alloc+0x16b/0x370 [ 32.368756] vm_area_dup+0x20/0x160 [ 32.369204] __split_vma+0x170/0x950 [ 32.369658] split_vma+0xc6/0x110 [ 32.370094] mprotect_fixup+0x8d2/0xb30 [ 32.370585] do_mprotect_pkey+0x87e/0xd40 [ 32.371090] __x64_sys_mprotect+0x78/0xc0 [ 32.371605] do_syscall_64+0x3f/0x90 [ 32.372076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.372728] [ 32.372943] Freed by task 212: [ 32.373326] kasan_save_stack+0x22/0x50 [ 32.373814] kasan_set_track+0x25/0x30 [ 32.374297] kasan_save_free_info+0x2b/0x50 [ 32.374815] __kasan_slab_free+0x10a/0x190 [ 32.375336] kmem_cache_free+0x10d/0x4d0 [ 32.375834] rcu_core+0x8c8/0x2860 [ 32.376272] __do_softirq+0x1b7/0x7d4 [ 32.376737] [ 32.376946] Last potentially related work creation: [ 32.377517] kasan_save_stack+0x22/0x50 [ 32.378007] __kasan_record_aux_stack+0x8e/0xa0 [ 32.378568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.379201] remove_vma+0x139/0x170 [ 32.379729] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.380284] do_vmi_munmap+0x1f1/0x2b0 [ 32.380768] __vm_munmap+0x138/0x3a0 [ 32.381232] __x64_sys_munmap+0x59/0x80 [ 32.381721] do_syscall_64+0x3f/0x90 [ 32.382189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.382831] [ 32.383046] The buggy address belongs to the object at ffff88800dff01d0 [ 32.383046] which belongs to the cache vm_area_struct of size 168 [ 32.384511] The buggy address is located 88 bytes inside of [ 32.384511] freed 168-byte region [ffff88800dff01d0, ffff88800dff0278) [ 32.385901] [ 32.386117] The buggy address belongs to the physical page: [ 32.386760] page:00000000864a061b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdff0 [ 32.387832] memcg:ffff88800f69a501 [ 32.388260] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.388892] page_type: 0xffffffff() [ 32.389337] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 32.390288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f69a501 [ 32.391177] page dumped because: kasan: bad access detected [ 32.391818] [ 32.392030] Memory state around the buggy address: [ 32.392614] ffff88800dff0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.393474] ffff88800dff0180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.394327] >ffff88800dff0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.395164] ^ [ 32.395716] ffff88800dff0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.396570] ffff88800dff0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.397400] ================================================================== [ 32.398306] Disabling lock debugging due to kernel taint [ 35.311293] BUG: Bad rss-counter state mm:000000007885b7c9 type:MM_FILEPAGES val:33 [ 35.312657] BUG: Bad rss-counter state mm:000000007885b7c9 type:MM_ANONPAGES val:22 [ 35.765839] BUG: Bad rss-counter state mm:0000000079d2c10a type:MM_FILEPAGES val:33 [ 35.766606] BUG: Bad rss-counter state mm:0000000079d2c10a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30845' (ECDSA) to the list of known hosts. 2023/06/20 16:01:34 fuzzer started 2023/06/20 16:01:34 dialing manager at localhost:36067 2023/06/20 16:01:35 checking machine... 2023/06/20 16:01:35 checking revisions... [ 36.478582] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:01:35 testing simple program... [ 36.520478] cgroup: Unknown subsys name 'net' [ 36.560697] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:01:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8451105e RCX=ffffffff860a1401 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8451105e RBP=ffffffff8451105e RSP=ffff88806ce09a48 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=0000000000000001 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019dc6670 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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=00007f9bfd442890 CR3=000000000d8e4000 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=31303a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303938 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=ffffffff813ad720 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016697701 RSI=ffff888016697778 RDI=ffff888016697778 RBP=ffff888016697730 RSP=ffff888016697618 R8 =ffffffff8608a55a R9 =ffff888016697718 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016697738 R13=ffff888016697720 R14=ffff888016697780 R15=ffff8880166976d8 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007ff027644900 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=00007ff027623020 CR3=0000000010132000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000