syzkaller login: [ 34.633832] BUG: Bad rss-counter state mm:00000000a3888e54 type:MM_FILEPAGES val:33 [ 34.635051] BUG: Bad rss-counter state mm:00000000a3888e54 type:MM_ANONPAGES val:22 [ 34.774186] ================================================================== [ 34.775111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.776053] Read of size 8 at addr ffff88800de31058 by task sshd/220 [ 34.776847] [ 34.777065] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.778113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.779119] Call Trace: [ 34.779452] [ 34.779742] dump_stack_lvl+0x91/0xf0 [ 34.780296] print_report+0xcc/0x620 [ 34.780827] ? __virt_addr_valid+0x102/0x340 [ 34.781419] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.782056] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.782701] kasan_report+0xbe/0xf0 [ 34.783203] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.783850] vma_interval_tree_remove+0xc75/0xec0 [ 34.784491] vma_prepare+0xc54/0x11a0 [ 34.784998] __split_vma+0x5af/0x950 [ 34.785483] ? __pfx___split_vma+0x10/0x10 [ 34.786015] ? find_held_lock+0x2c/0x110 [ 34.786531] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.787089] ? lock_is_held_type+0x9f/0x120 [ 34.787628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.788239] ? mtree_range_walk+0x632/0x900 [ 34.788803] ? mas_walk+0x5c7/0x7c0 [ 34.789280] do_vmi_munmap+0x1f1/0x2b0 [ 34.789772] mmap_region+0x1f9/0x2660 [ 34.790261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.790767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.791488] ? __pfx_lock_acquire+0x10/0x10 [ 34.792019] ? __pfx_mmap_region+0x10/0x10 [ 34.792545] ? security_mmap_addr+0x7d/0xa0 [ 34.793083] ? get_unmapped_area+0x1f5/0x3f0 [ 34.793631] do_mmap+0x854/0xf00 [ 34.794067] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.794567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.795129] ksys_mmap_pgoff+0x3af/0x500 [ 34.795632] do_syscall_64+0x3f/0x90 [ 34.796105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.796747] RIP: 0033:0x7f8bfde25d82 [ 34.797211] 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 [ 34.799324] RSP: 002b:00007ffccca46578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.800228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8bfde25d82 [ 34.801101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8bfd25f000 [ 34.801944] RBP: 00007f8bfd25f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.802777] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623e35d3ec0 [ 34.803611] R13: 00007ffccca46590 R14: 00007ffccca465c0 R15: 00007ffccca46920 [ 34.804462] [ 34.804755] [ 34.804992] Allocated by task 213: [ 34.805415] kasan_save_stack+0x22/0x50 [ 34.805913] kasan_set_track+0x25/0x30 [ 34.806400] __kasan_slab_alloc+0x59/0x70 [ 34.806921] kmem_cache_alloc+0x16b/0x370 [ 34.807434] vm_area_dup+0x20/0x160 [ 34.807884] __split_vma+0x170/0x950 [ 34.808349] split_vma+0xc6/0x110 [ 34.808801] mprotect_fixup+0x8d2/0xb30 [ 34.809308] do_mprotect_pkey+0x87e/0xd40 [ 34.809830] __x64_sys_mprotect+0x78/0xc0 [ 34.810349] do_syscall_64+0x3f/0x90 [ 34.810820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.811469] [ 34.811685] Freed by task 203: [ 34.812077] kasan_save_stack+0x22/0x50 [ 34.812579] kasan_set_track+0x25/0x30 [ 34.813084] kasan_save_free_info+0x2b/0x50 [ 34.813612] __kasan_slab_free+0x10a/0x190 [ 34.814140] kmem_cache_free+0x10d/0x4d0 [ 34.814645] rcu_core+0x8c8/0x2860 [ 34.815090] __do_softirq+0x1b7/0x7d4 [ 34.815562] [ 34.815780] Last potentially related work creation: [ 34.816364] kasan_save_stack+0x22/0x50 [ 34.816891] __kasan_record_aux_stack+0x8e/0xa0 [ 34.817460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.818099] remove_vma+0x139/0x170 [ 34.818552] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.819105] do_vmi_munmap+0x1f1/0x2b0 [ 34.819630] __vm_munmap+0x138/0x3a0 [ 34.820099] __x64_sys_munmap+0x59/0x80 [ 34.820592] do_syscall_64+0x3f/0x90 [ 34.821074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.821720] [ 34.821935] Second to last potentially related work creation: [ 34.822609] kasan_save_stack+0x22/0x50 [ 34.823109] __kasan_record_aux_stack+0x8e/0xa0 [ 34.823679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.824320] remove_vma+0x139/0x170 [ 34.824794] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.825359] do_vmi_munmap+0x1f1/0x2b0 [ 34.825848] mmap_region+0x1f9/0x2660 [ 34.826330] do_mmap+0x854/0xf00 [ 34.826754] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.827238] ksys_mmap_pgoff+0x3af/0x500 [ 34.827734] do_syscall_64+0x3f/0x90 [ 34.828201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.828844] [ 34.829061] The buggy address belongs to the object at ffff88800de31000 [ 34.829061] which belongs to the cache vm_area_struct of size 168 [ 34.830518] The buggy address is located 88 bytes inside of [ 34.830518] freed 168-byte region [ffff88800de31000, ffff88800de310a8) [ 34.831912] [ 34.832125] The buggy address belongs to the physical page: [ 34.832785] page:00000000d6020d73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde31 [ 34.833866] memcg:ffff88800e98df01 [ 34.834293] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.834984] page_type: 0xffffffff() [ 34.835430] raw: 0100000000000200 ffff88800879fc80 ffffea0000385400 dead000000000005 [ 34.836337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e98df01 [ 34.837251] page dumped because: kasan: bad access detected [ 34.837906] [ 34.838127] Memory state around the buggy address: [ 34.838704] ffff88800de30f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 34.839559] ffff88800de30f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.840410] >ffff88800de31000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.841264] ^ [ 34.841992] ffff88800de31080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.842835] ffff88800de31100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.843675] ================================================================== [ 34.844792] Disabling lock debugging due to kernel taint [ 36.990815] BUG: Bad rss-counter state mm:00000000af7a3e08 type:MM_FILEPAGES val:33 [ 36.992072] BUG: Bad rss-counter state mm:00000000af7a3e08 type:MM_ANONPAGES val:22 [ 37.487781] BUG: Bad rss-counter state mm:00000000a97f94b0 type:MM_FILEPAGES val:33 [ 37.488891] BUG: Bad rss-counter state mm:00000000a97f94b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30523' (ECDSA) to the list of known hosts. 2023/06/19 22:35:09 fuzzer started 2023/06/19 22:35:09 dialing manager at localhost:44161 2023/06/19 22:35:10 checking machine... 2023/06/19 22:35:10 checking revisions... [ 39.002178] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:35:10 testing simple program... [ 39.047069] cgroup: Unknown subsys name 'net' [ 39.082639] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 22:35:05 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f1f2737cdad RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff813a0a74 RDI=00007f1f2737cdad RBP=00007f1f2737cdad RSP=ffff888015c57390 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f1f2737c000 R11=00000000000b6996 R12=ffff888015c574d0 R13=0000000000000000 R14=ffff888015d88000 R15=000000000000001e RIP=ffffffff814c07f1 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 00007f1f26d3a700 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=00007fa64d4b9990 CR3=0000000016be4000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36353035342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363530 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=0000000000000000 RBX=0000000000000000 RCX=ffffffff818a87ec RDX=ffff88800a6dd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888017d87b08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888017d87c48 R13=dffffc0000000000 R14=0000000000008000 R15=ffff888017d87df0 RIP=ffffffff814c07e0 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 00007fbee5d28900 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=00007ffed8129000 CR3=000000001c684000 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