syzkaller login: [ 38.746564] BUG: Bad rss-counter state mm:00000000c8dfd727 type:MM_FILEPAGES val:33 [ 38.747765] BUG: Bad rss-counter state mm:00000000c8dfd727 type:MM_ANONPAGES val:22 [ 38.781062] ================================================================== [ 38.782192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.783318] Read of size 8 at addr ffff88800e44b968 by task sshd/219 [ 38.784201] [ 38.784486] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.785457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.786562] Call Trace: [ 38.786882] [ 38.787231] dump_stack_lvl+0x91/0xf0 [ 38.787819] print_report+0xcc/0x620 [ 38.788307] ? __virt_addr_valid+0x102/0x340 [ 38.788876] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.789528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.790314] kasan_report+0xbe/0xf0 [ 38.790787] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.791530] vma_interval_tree_remove+0xc75/0xec0 [ 38.792264] vma_prepare+0xc54/0x11a0 [ 38.792763] __split_vma+0x5af/0x950 [ 38.793306] ? __pfx___split_vma+0x10/0x10 [ 38.793970] ? find_held_lock+0x2c/0x110 [ 38.794657] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.795283] ? lock_is_held_type+0x9f/0x120 [ 38.795826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.796433] ? mtree_range_walk+0x632/0x900 [ 38.796981] ? mas_walk+0x5c7/0x7c0 [ 38.797460] do_vmi_munmap+0x1f1/0x2b0 [ 38.797976] mmap_region+0x1f9/0x2660 [ 38.798464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.798979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.799690] ? __pfx_lock_acquire+0x10/0x10 [ 38.800229] ? __pfx_mmap_region+0x10/0x10 [ 38.800757] ? security_mmap_addr+0x7d/0xa0 [ 38.801285] ? get_unmapped_area+0x1f5/0x3f0 [ 38.801860] do_mmap+0x854/0xf00 [ 38.802306] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.802821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.803392] ksys_mmap_pgoff+0x3af/0x500 [ 38.803906] do_syscall_64+0x3f/0x90 [ 38.804393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.805044] RIP: 0033:0x7f88b60ced82 [ 38.805508] 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 [ 38.807648] RSP: 002b:00007ffe89798fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.808553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88b60ced82 [ 38.809575] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88b5508000 [ 38.810489] RBP: 00007f88b5508000 R08: 0000000000000009 R09: 0000000000001000 [ 38.811348] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c7f97bec0 [ 38.812209] R13: 00007ffe89798ff0 R14: 00007ffe89799020 R15: 00007ffe89799380 [ 38.813065] [ 38.813363] [ 38.813582] Allocated by task 212: [ 38.814026] kasan_save_stack+0x22/0x50 [ 38.814531] kasan_set_track+0x25/0x30 [ 38.815025] __kasan_slab_alloc+0x59/0x70 [ 38.815563] kmem_cache_alloc+0x16b/0x370 [ 38.816078] vm_area_dup+0x20/0x160 [ 38.816533] __split_vma+0x170/0x950 [ 38.817004] split_vma+0xc6/0x110 [ 38.817447] mprotect_fixup+0x8d2/0xb30 [ 38.818096] do_mprotect_pkey+0x87e/0xd40 [ 38.818766] __x64_sys_mprotect+0x78/0xc0 [ 38.819390] do_syscall_64+0x3f/0x90 [ 38.819987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.820776] [ 38.821035] Freed by task 212: [ 38.821498] kasan_save_stack+0x22/0x50 [ 38.822130] kasan_set_track+0x25/0x30 [ 38.822737] kasan_save_free_info+0x2b/0x50 [ 38.823373] __kasan_slab_free+0x10a/0x190 [ 38.824033] kmem_cache_free+0x10d/0x4d0 [ 38.824653] rcu_core+0x8c8/0x2860 [ 38.825180] __do_softirq+0x1b7/0x7d4 [ 38.825792] [ 38.826058] Last potentially related work creation: [ 38.826741] kasan_save_stack+0x22/0x50 [ 38.827257] __kasan_record_aux_stack+0x8e/0xa0 [ 38.827839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.828501] remove_vma+0x139/0x170 [ 38.828977] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.829537] do_vmi_munmap+0x1f1/0x2b0 [ 38.830057] __vm_munmap+0x138/0x3a0 [ 38.830524] __x64_sys_munmap+0x59/0x80 [ 38.831042] do_syscall_64+0x3f/0x90 [ 38.831516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.832168] [ 38.832427] The buggy address belongs to the object at ffff88800e44b910 [ 38.832427] which belongs to the cache vm_area_struct of size 168 [ 38.833998] The buggy address is located 88 bytes inside of [ 38.833998] freed 168-byte region [ffff88800e44b910, ffff88800e44b9b8) [ 38.835420] [ 38.835653] The buggy address belongs to the physical page: [ 38.836320] page:00000000be090232 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe44b [ 38.837448] memcg:ffff88800e138f01 [ 38.837915] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.838579] page_type: 0xffffffff() [ 38.839054] raw: 0100000000000200 ffff8880087a0c80 ffffea0000391740 dead000000000006 [ 38.840003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e138f01 [ 38.840929] page dumped because: kasan: bad access detected [ 38.841622] [ 38.841868] Memory state around the buggy address: [ 38.842458] ffff88800e44b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.843553] ffff88800e44b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.844669] >ffff88800e44b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.845734] ^ [ 38.846709] ffff88800e44b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.847773] ffff88800e44ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.848846] ================================================================== [ 38.850141] Disabling lock debugging due to kernel taint [ 41.065332] BUG: Bad rss-counter state mm:000000006a2a8f01 type:MM_FILEPAGES val:33 [ 41.066335] BUG: Bad rss-counter state mm:000000006a2a8f01 type:MM_ANONPAGES val:22 [ 41.548410] BUG: Bad rss-counter state mm:00000000be064f6c type:MM_FILEPAGES val:33 [ 41.549565] BUG: Bad rss-counter state mm:00000000be064f6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37519' (ECDSA) to the list of known hosts. 2023/06/20 14:08:33 fuzzer started 2023/06/20 14:08:34 dialing manager at localhost:36067 2023/06/20 14:08:34 checking machine... 2023/06/20 14:08:34 checking revisions... [ 42.278536] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:08:34 testing simple program... [ 42.333488] cgroup: Unknown subsys name 'net' [ 42.404186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:08:33 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015dd51c0 RSI=ffffffff8186c179 RDI=ffff888019811d60 RBP=ffff888019811d60 RSP=ffff8880171b7d80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000003 R13=ffff88800f39a2d0 R14=000000000000c000 R15=ffff88801634e840 RIP=ffffffff814c086b 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 00007f4125287900 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=00007ffc332d5000 CR3=000000001028a000 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=6720646572637465733a4d41503d706f 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 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=00007f899f0e17e0 CR3=000000000c4d4000 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=38303a3431203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383634 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000