syzkaller login: [ 30.627744] BUG: Bad rss-counter state mm:00000000840ce16e type:MM_FILEPAGES val:33 [ 30.628896] BUG: Bad rss-counter state mm:00000000840ce16e type:MM_ANONPAGES val:22 [ 30.780643] ================================================================== [ 30.781963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.783223] Read of size 8 at addr ffff88800e5dfd08 by task sshd/221 [ 30.784160] [ 30.784418] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.785475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.786671] Call Trace: [ 30.787059] [ 30.787395] dump_stack_lvl+0x91/0xf0 [ 30.787980] print_report+0xcc/0x620 [ 30.788561] ? __virt_addr_valid+0x102/0x340 [ 30.789256] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790746] kasan_report+0xbe/0xf0 [ 30.791311] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792057] vma_interval_tree_remove+0xc75/0xec0 [ 30.792783] vma_prepare+0xc54/0x11a0 [ 30.793358] __split_vma+0x5af/0x950 [ 30.793924] ? __pfx___split_vma+0x10/0x10 [ 30.794564] ? find_held_lock+0x2c/0x110 [ 30.795192] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.795881] ? lock_is_held_type+0x9f/0x120 [ 30.796530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.797277] ? mtree_range_walk+0x632/0x900 [ 30.797947] ? mas_walk+0x5c7/0x7c0 [ 30.798511] do_vmi_munmap+0x1f1/0x2b0 [ 30.799111] mmap_region+0x1f9/0x2660 [ 30.799693] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.800315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.801206] ? __pfx_lock_acquire+0x10/0x10 [ 30.801855] ? __pfx_mmap_region+0x10/0x10 [ 30.802496] ? security_mmap_addr+0x7d/0xa0 [ 30.803140] ? get_unmapped_area+0x1f5/0x3f0 [ 30.803799] do_mmap+0x854/0xf00 [ 30.804322] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.804920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.805498] ksys_mmap_pgoff+0x3af/0x500 [ 30.805994] do_syscall_64+0x3f/0x90 [ 30.806450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807062] RIP: 0033:0x7fb41ca0ed82 [ 30.807495] 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 [ 30.809484] RSP: 002b:00007ffd1e46d668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.810326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb41ca0ed82 [ 30.811122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb41be48000 [ 30.811915] RBP: 00007fb41be48000 R08: 0000000000000009 R09: 0000000000001000 [ 30.812706] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558982726f70 [ 30.813521] R13: 00007ffd1e46d680 R14: 00007ffd1e46d6b0 R15: 00007ffd1e46da10 [ 30.814347] [ 30.814622] [ 30.814832] Allocated by task 214: [ 30.815248] kasan_save_stack+0x22/0x50 [ 30.815730] kasan_set_track+0x25/0x30 [ 30.816207] __kasan_slab_alloc+0x59/0x70 [ 30.816714] kmem_cache_alloc+0x16b/0x370 [ 30.817222] vm_area_dup+0x20/0x160 [ 30.817657] __split_vma+0x170/0x950 [ 30.818099] split_vma+0xc6/0x110 [ 30.818515] mprotect_fixup+0x8d2/0xb30 [ 30.818994] do_mprotect_pkey+0x87e/0xd40 [ 30.819488] __x64_sys_mprotect+0x78/0xc0 [ 30.819982] do_syscall_64+0x3f/0x90 [ 30.820440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821071] [ 30.821281] Freed by task 214: [ 30.821655] kasan_save_stack+0x22/0x50 [ 30.822138] kasan_set_track+0x25/0x30 [ 30.822606] kasan_save_free_info+0x2b/0x50 [ 30.823102] __kasan_slab_free+0x10a/0x190 [ 30.823608] kmem_cache_free+0x10d/0x4d0 [ 30.824089] rcu_core+0x8c8/0x2860 [ 30.824511] __do_softirq+0x1b7/0x7d4 [ 30.824959] [ 30.825173] Last potentially related work creation: [ 30.825720] kasan_save_stack+0x22/0x50 [ 30.826192] __kasan_record_aux_stack+0x8e/0xa0 [ 30.826731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.827336] remove_vma+0x139/0x170 [ 30.827761] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.828288] do_vmi_munmap+0x1f1/0x2b0 [ 30.828745] __vm_munmap+0x138/0x3a0 [ 30.829201] __x64_sys_munmap+0x59/0x80 [ 30.829671] do_syscall_64+0x3f/0x90 [ 30.830115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830720] [ 30.830924] Second to last potentially related work creation: [ 30.831569] kasan_save_stack+0x22/0x50 [ 30.832053] __kasan_record_aux_stack+0x8e/0xa0 [ 30.832628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833279] remove_vma+0x139/0x170 [ 30.833740] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.834287] do_vmi_munmap+0x1f1/0x2b0 [ 30.834769] mmap_region+0x1f9/0x2660 [ 30.835242] do_mmap+0x854/0xf00 [ 30.835675] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.836164] ksys_mmap_pgoff+0x3af/0x500 [ 30.836660] do_syscall_64+0x3f/0x90 [ 30.837153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837805] [ 30.838019] The buggy address belongs to the object at ffff88800e5dfcb0 [ 30.838019] which belongs to the cache vm_area_struct of size 168 [ 30.839462] The buggy address is located 88 bytes inside of [ 30.839462] freed 168-byte region [ffff88800e5dfcb0, ffff88800e5dfd58) [ 30.840864] [ 30.841089] The buggy address belongs to the physical page: [ 30.841761] page:000000004c832bb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5df [ 30.842846] memcg:ffff88800dec8d01 [ 30.843275] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.843918] page_type: 0xffffffff() [ 30.844366] raw: 0100000000000200 ffff8880087a0c80 ffffea00004013c0 dead00000000000c [ 30.845316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dec8d01 [ 30.846227] page dumped because: kasan: bad access detected [ 30.846891] [ 30.847105] Memory state around the buggy address: [ 30.847683] ffff88800e5dfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.848539] ffff88800e5dfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.849404] >ffff88800e5dfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.850249] ^ [ 30.850694] ffff88800e5dfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.851551] ffff88800e5dfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.852416] ================================================================== [ 30.853439] Disabling lock debugging due to kernel taint [ 32.786545] BUG: Bad rss-counter state mm:000000004a644934 type:MM_FILEPAGES val:33 [ 32.787782] BUG: Bad rss-counter state mm:000000004a644934 type:MM_ANONPAGES val:22 [ 33.332879] BUG: Bad rss-counter state mm:000000006e4bddd6 type:MM_FILEPAGES val:33 [ 33.334189] BUG: Bad rss-counter state mm:000000006e4bddd6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31578' (ECDSA) to the list of known hosts. 2023/06/21 03:57:32 fuzzer started 2023/06/21 03:57:33 dialing manager at localhost:36067 2023/06/21 03:57:33 checking machine... 2023/06/21 03:57:33 checking revisions... [ 33.969847] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:57:33 testing simple program... [ 34.016349] cgroup: Unknown subsys name 'net' [ 34.081165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:57:32 Registers: info registers vcpu 0 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff8880147ffd28 RSP=ffff8880147ffc60 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000f7 R11=0000000000000000 R12=0000000000000015 R13=ffff8880147ffd60 R14=0000000000000015 R15=ffffc9000068d730 RIP=ffffffff815a72aa 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 00007f322a898900 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=00007f3229cb9210 CR3=000000000c9ec000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7f08265a78cc9f1800000000000ae988 XMM05=1bab9e350427027d0000000000133c60 XMM06=df1a57023602fe470000000000132a00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7343 RBX=ffffffff85db9a18 RCX=ffffffff81370a89 RDX=0000000000000000 RSI=ffffffff860d2550 RDI=ffffffff85db99f4 RBP=ffffffff85db9a18 RSP=ffff888016457820 R8 =ffffffff860d2550 R9 =ffff888016457918 R10=0000000000038001 R11=000000000000fc0c R12=ffffffff85db9a18 R13=ffffffff85db99f4 R14=ffffffff85db9a14 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 00007fa0afe02900 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=00007ffff3a81000 CR3=00000000169c6000 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=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