syzkaller login: [ 35.621505] BUG: Bad rss-counter state mm:00000000d44241a2 type:MM_FILEPAGES val:33 [ 35.622204] BUG: Bad rss-counter state mm:00000000d44241a2 type:MM_ANONPAGES val:22 [ 35.652378] ================================================================== [ 35.653265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.653951] Read of size 8 at addr ffff888019de6c20 by task sshd/220 [ 35.654523] [ 35.654681] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.655389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.656220] Call Trace: [ 35.656541] [ 35.656801] dump_stack_lvl+0x91/0xf0 [ 35.657138] print_report+0xcc/0x620 [ 35.657477] ? __virt_addr_valid+0x102/0x340 [ 35.657861] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.658290] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.658723] kasan_report+0xbe/0xf0 [ 35.659099] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.659526] vma_interval_tree_remove+0xc75/0xec0 [ 35.659950] vma_prepare+0xc54/0x11a0 [ 35.660278] __split_vma+0x5af/0x950 [ 35.660602] ? __pfx___split_vma+0x10/0x10 [ 35.660979] ? find_held_lock+0x2c/0x110 [ 35.661342] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.661732] ? lock_is_held_type+0x9f/0x120 [ 35.662106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.662523] ? mtree_range_walk+0x632/0x900 [ 35.662911] ? mas_walk+0x5c7/0x7c0 [ 35.663271] do_vmi_munmap+0x1f1/0x2b0 [ 35.663614] mmap_region+0x1f9/0x2660 [ 35.663950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.664311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.664813] ? __pfx_lock_acquire+0x10/0x10 [ 35.665180] ? __pfx_mmap_region+0x10/0x10 [ 35.665551] ? security_mmap_addr+0x7d/0xa0 [ 35.665916] ? get_unmapped_area+0x1f5/0x3f0 [ 35.666306] do_mmap+0x854/0xf00 [ 35.666613] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.666959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.667415] ksys_mmap_pgoff+0x3af/0x500 [ 35.667763] do_syscall_64+0x3f/0x90 [ 35.668099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.668542] RIP: 0033:0x7fc82b99ad82 [ 35.668860] 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 [ 35.670301] RSP: 002b:00007ffe9052ec68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.670933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc82b99ad82 [ 35.671566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc82add4000 [ 35.672170] RBP: 00007fc82add4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.672782] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559feddba980 [ 35.673379] R13: 00007ffe9052ec80 R14: 00007ffe9052ecb0 R15: 00007ffe9052f010 [ 35.673994] [ 35.674202] [ 35.674353] Allocated by task 213: [ 35.674669] kasan_save_stack+0x22/0x50 [ 35.675066] kasan_set_track+0x25/0x30 [ 35.675414] __kasan_slab_alloc+0x59/0x70 [ 35.675786] kmem_cache_alloc+0x16b/0x370 [ 35.676149] vm_area_dup+0x20/0x160 [ 35.676465] __split_vma+0x170/0x950 [ 35.676799] split_vma+0xc6/0x110 [ 35.677110] mprotect_fixup+0x8d2/0xb30 [ 35.677460] do_mprotect_pkey+0x87e/0xd40 [ 35.677820] __x64_sys_mprotect+0x78/0xc0 [ 35.678182] do_syscall_64+0x3f/0x90 [ 35.678517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.678971] [ 35.679182] Freed by task 213: [ 35.679463] kasan_save_stack+0x22/0x50 [ 35.679817] kasan_set_track+0x25/0x30 [ 35.680169] kasan_save_free_info+0x2b/0x50 [ 35.680541] __kasan_slab_free+0x10a/0x190 [ 35.680929] kmem_cache_free+0x10d/0x4d0 [ 35.681288] rcu_core+0x8c8/0x2860 [ 35.681603] __do_softirq+0x1b7/0x7d4 [ 35.681940] [ 35.682097] Last potentially related work creation: [ 35.682523] kasan_save_stack+0x22/0x50 [ 35.682883] __kasan_record_aux_stack+0x8e/0xa0 [ 35.683326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.683776] remove_vma+0x139/0x170 [ 35.684093] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.684490] do_vmi_munmap+0x1f1/0x2b0 [ 35.684833] __vm_munmap+0x138/0x3a0 [ 35.685158] __x64_sys_munmap+0x59/0x80 [ 35.685511] do_syscall_64+0x3f/0x90 [ 35.685852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.686306] [ 35.686455] The buggy address belongs to the object at ffff888019de6bc8 [ 35.686455] which belongs to the cache vm_area_struct of size 168 [ 35.688445] The buggy address is located 88 bytes inside of [ 35.688445] freed 168-byte region [ffff888019de6bc8, ffff888019de6c70) [ 35.689368] [ 35.689509] The buggy address belongs to the physical page: [ 35.689944] page:000000003d886bda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19de6 [ 35.690655] memcg:ffff888018dd1801 [ 35.690940] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.691399] page_type: 0xffffffff() [ 35.691703] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.692309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018dd1801 [ 35.692914] page dumped because: kasan: bad access detected [ 35.693362] [ 35.693512] Memory state around the buggy address: [ 35.693921] ffff888019de6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.694511] ffff888019de6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.695104] >ffff888019de6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.695665] ^ [ 35.696007] ffff888019de6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.696561] ffff888019de6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.697116] ================================================================== [ 35.697896] Disabling lock debugging due to kernel taint [ 37.467103] BUG: Bad rss-counter state mm:000000007ec686f5 type:MM_FILEPAGES val:33 [ 37.467777] BUG: Bad rss-counter state mm:000000007ec686f5 type:MM_ANONPAGES val:22 [ 37.891179] BUG: Bad rss-counter state mm:00000000fe003e67 type:MM_FILEPAGES val:33 [ 37.891889] BUG: Bad rss-counter state mm:00000000fe003e67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63627' (ECDSA) to the list of known hosts. 2023/06/20 09:35:19 fuzzer started 2023/06/20 09:35:19 dialing manager at localhost:44161 2023/06/20 09:35:19 checking machine... 2023/06/20 09:35:19 checking revisions... [ 38.392729] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:35:19 testing simple program... [ 38.429934] cgroup: Unknown subsys name 'net' [ 38.466270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:35:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff836435d0 RCX=0000000000000001 RDX=1ffff110028d0e72 RSI=ffff888014687bf8 RDI=ffffffff836435d0 RBP=ffffffff836435d0 RSP=ffff8880146872f0 R8 =0000000000000001 R9 =ffff888014687378 R10=0000000000038001 R11=000000000008a8aa R12=ffff888014687400 R13=0000000000000000 R14=ffff88800cc33680 R15=0000000000400cc0 RIP=ffffffff811fc6f0 RFL=00000292 [--S-A--] 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 00007f9de99c1900 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=00007f9de8df9ee0 CR3=0000000010254000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=74435ff0f2f375d800000000000ae988 XMM05=ffd8c9bea9fbdfcc0000000000135308 XMM06=d6fee698b96f15c500000000001340a8 XMM07=fb795ef6d657705600000000001245e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888018f4d1c0 RSI=ffffffff81ef7b48 RDI=ffff88800dda6848 RBP=0000000000000001 RSP=ffff8880145df688 R8 =0000000000000002 R9 =0000000000000005 R10=0000000000000025 R11=656d616e74736f68 R12=ffff888008ccda28 R13=0000000000000005 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff81ef7b63 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 00007f35514b2900 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=00007fff0f420000 CR3=000000000f658000 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