syzkaller login: [ 31.774753] BUG: Bad rss-counter state mm:0000000017ee6c02 type:MM_FILEPAGES val:33 [ 31.775748] BUG: Bad rss-counter state mm:0000000017ee6c02 type:MM_ANONPAGES val:22 [ 31.934931] ================================================================== [ 31.936218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.937597] Read of size 8 at addr ffff8880162433f8 by task sshd/220 [ 31.938665] [ 31.938958] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.940172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.941318] Call Trace: [ 31.941697] [ 31.942032] dump_stack_lvl+0x91/0xf0 [ 31.942603] print_report+0xcc/0x620 [ 31.943161] ? __virt_addr_valid+0x102/0x340 [ 31.943794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.944530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.945260] kasan_report+0xbe/0xf0 [ 31.945802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.946509] vma_interval_tree_remove+0xc75/0xec0 [ 31.947208] vma_prepare+0xc54/0x11a0 [ 31.947768] __split_vma+0x5af/0x950 [ 31.948324] ? __pfx___split_vma+0x10/0x10 [ 31.948949] ? find_held_lock+0x2c/0x110 [ 31.949551] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.950213] ? lock_is_held_type+0x9f/0x120 [ 31.950844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.951574] ? mtree_range_walk+0x632/0x900 [ 31.952240] ? mas_walk+0x5c7/0x7c0 [ 31.952792] do_vmi_munmap+0x1f1/0x2b0 [ 31.953360] mmap_region+0x1f9/0x2660 [ 31.953911] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.954499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.955314] ? __pfx_lock_acquire+0x10/0x10 [ 31.955925] ? __pfx_mmap_region+0x10/0x10 [ 31.956545] ? security_mmap_addr+0x7d/0xa0 [ 31.957161] ? get_unmapped_area+0x1f5/0x3f0 [ 31.957799] do_mmap+0x854/0xf00 [ 31.958311] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.958876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.959525] ksys_mmap_pgoff+0x3af/0x500 [ 31.960130] do_syscall_64+0x3f/0x90 [ 31.960675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.961416] RIP: 0033:0x7f3cf3365d82 [ 31.961961] 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 [ 31.964499] RSP: 002b:00007ffe6aed94e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.965569] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cf3365d82 [ 31.966574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cf279f000 [ 31.967580] RBP: 00007f3cf279f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.968610] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f94bde7ec0 [ 31.969621] R13: 00007ffe6aed9500 R14: 00007ffe6aed9530 R15: 00007ffe6aed9890 [ 31.970648] [ 31.970995] [ 31.971251] Allocated by task 212: [ 31.971760] kasan_save_stack+0x22/0x50 [ 31.972363] kasan_set_track+0x25/0x30 [ 31.972955] __kasan_slab_alloc+0x59/0x70 [ 31.973567] kmem_cache_alloc+0x16b/0x370 [ 31.974175] vm_area_dup+0x20/0x160 [ 31.974705] __split_vma+0x170/0x950 [ 31.975250] split_vma+0xc6/0x110 [ 31.975762] mprotect_fixup+0x8d2/0xb30 [ 31.976366] do_mprotect_pkey+0x87e/0xd40 [ 31.976979] __x64_sys_mprotect+0x78/0xc0 [ 31.977676] do_syscall_64+0x3f/0x90 [ 31.978233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.978982] [ 31.979237] Freed by task 219: [ 31.979695] kasan_save_stack+0x22/0x50 [ 31.980292] kasan_set_track+0x25/0x30 [ 31.980868] kasan_save_free_info+0x2b/0x50 [ 31.981485] __kasan_slab_free+0x10a/0x190 [ 31.982107] kmem_cache_free+0x10d/0x4d0 [ 31.982702] rcu_core+0x8c8/0x2860 [ 31.983224] __do_softirq+0x1b7/0x7d4 [ 31.983778] [ 31.984039] Last potentially related work creation: [ 31.984731] kasan_save_stack+0x22/0x50 [ 31.985323] __kasan_record_aux_stack+0x8e/0xa0 [ 31.985989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.986744] remove_vma+0x139/0x170 [ 31.987279] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.987929] do_vmi_munmap+0x1f1/0x2b0 [ 31.988517] __vm_munmap+0x138/0x3a0 [ 31.989061] __x64_sys_munmap+0x59/0x80 [ 31.989640] do_syscall_64+0x3f/0x90 [ 31.990196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.990939] [ 31.991191] The buggy address belongs to the object at ffff8880162433a0 [ 31.991191] which belongs to the cache vm_area_struct of size 168 [ 31.992920] The buggy address is located 88 bytes inside of [ 31.992920] freed 168-byte region [ffff8880162433a0, ffff888016243448) [ 31.994574] [ 31.994833] The buggy address belongs to the physical page: [ 31.995608] page:0000000084a8ef9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16243 [ 31.996924] memcg:ffff88800ee6e901 [ 31.997426] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.998181] page_type: 0xffffffff() [ 31.998705] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.999787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee6e901 [ 32.000872] page dumped because: kasan: bad access detected [ 32.001642] [ 32.001893] Memory state around the buggy address: [ 32.002567] ffff888016243280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.003567] ffff888016243300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.004570] >ffff888016243380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.005555] ^ [ 32.006543] ffff888016243400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.007535] ffff888016243480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.008542] ================================================================== [ 32.009615] Disabling lock debugging due to kernel taint [ 34.701465] BUG: Bad rss-counter state mm:00000000de01562e type:MM_FILEPAGES val:33 [ 34.702448] BUG: Bad rss-counter state mm:00000000de01562e type:MM_ANONPAGES val:22 [ 35.209686] BUG: Bad rss-counter state mm:000000001d105f03 type:MM_FILEPAGES val:33 [ 35.210730] BUG: Bad rss-counter state mm:000000001d105f03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8979' (ECDSA) to the list of known hosts. 2023/06/20 05:25:13 fuzzer started 2023/06/20 05:25:13 dialing manager at localhost:44161 2023/06/20 05:25:13 checking machine... 2023/06/20 05:25:13 checking revisions... [ 35.957704] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:25:13 testing simple program... [ 36.013794] cgroup: Unknown subsys name 'net' [ 36.053835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:11 Registers: info registers vcpu 0 RAX=ffff888018090000 RBX=ffff8880180979d0 RCX=ffff8880180979d8 RDX=ffff888018098000 RSI=ffff8880180979d0 RDI=ffff888018097948 RBP=dffffc0000000000 RSP=ffff8880180978e8 R8 =0000000000000001 R9 =ffff888018097978 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1003012f29 R13=ffffed1003012f28 R14=ffff888018097980 R15=ffff888018097938 RIP=ffffffff81132fd9 RFL=00000297 [--S-APC] 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 00007f13341f6900 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=00007fd84d08ded0 CR3=000000000da2a000 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=ebe43b4292a44dade44fc9481e646be8 XMM02=000000000011cc08ec2efd57dc4c00df XMM03=00000000001240e0636ab6a4a980e7ae XMM04=2886e4b49a83ffae00000000000ae988 XMM05=19e9129bd510f2350000000000133bf0 XMM06=07867d8fa6026b8b0000000000132a58 XMM07=e042d86d42eb936e0000000000124360 XMM08=636ab6a4a980e7ae000000000011cc68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f13347ae0b0 CR3=000000000d638000 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=2032313a35323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000