syzkaller login: [ 30.794616] BUG: Bad rss-counter state mm:000000008c09cd81 type:MM_FILEPAGES val:33 [ 30.795795] BUG: Bad rss-counter state mm:000000008c09cd81 type:MM_ANONPAGES val:22 [ 30.948636] ================================================================== [ 30.949554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.950522] Read of size 8 at addr ffff88800d771d08 by task sshd/220 [ 30.951308] [ 30.951530] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.952466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.953458] Call Trace: [ 30.953786] [ 30.954075] dump_stack_lvl+0x91/0xf0 [ 30.954579] print_report+0xcc/0x620 [ 30.955095] ? __virt_addr_valid+0x102/0x340 [ 30.955644] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956888] kasan_report+0xbe/0xf0 [ 30.957366] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.958001] vma_interval_tree_remove+0xc75/0xec0 [ 30.958610] vma_prepare+0xc54/0x11a0 [ 30.959105] __split_vma+0x5af/0x950 [ 30.959585] ? __pfx___split_vma+0x10/0x10 [ 30.960131] ? find_held_lock+0x2c/0x110 [ 30.960662] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.961232] ? lock_is_held_type+0x9f/0x120 [ 30.961779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.962397] ? mtree_range_walk+0x632/0x900 [ 30.962960] ? mas_walk+0x5c7/0x7c0 [ 30.963450] do_vmi_munmap+0x1f1/0x2b0 [ 30.963947] mmap_region+0x1f9/0x2660 [ 30.964441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.964954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.965683] ? __pfx_lock_acquire+0x10/0x10 [ 30.966227] ? __pfx_mmap_region+0x10/0x10 [ 30.966770] ? security_mmap_addr+0x7d/0xa0 [ 30.967324] ? get_unmapped_area+0x1f5/0x3f0 [ 30.967887] do_mmap+0x854/0xf00 [ 30.968337] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.968846] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.969423] ksys_mmap_pgoff+0x3af/0x500 [ 30.969960] do_syscall_64+0x3f/0x90 [ 30.970447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.971113] RIP: 0033:0x7f6611214d82 [ 30.971579] 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 [ 30.973754] RSP: 002b:00007ffdd7837e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.974696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6611214d82 [ 30.975588] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f661064e000 [ 30.976450] RBP: 00007f661064e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.977316] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5bd57cec0 [ 30.978184] R13: 00007ffdd7837e90 R14: 00007ffdd7837ec0 R15: 00007ffdd7838220 [ 30.979076] [ 30.979373] [ 30.979594] Allocated by task 213: [ 30.980032] kasan_save_stack+0x22/0x50 [ 30.980544] kasan_set_track+0x25/0x30 [ 30.981043] __kasan_slab_alloc+0x59/0x70 [ 30.981586] kmem_cache_alloc+0x16b/0x370 [ 30.982145] vm_area_dup+0x20/0x160 [ 30.982611] __split_vma+0x170/0x950 [ 30.983084] split_vma+0xc6/0x110 [ 30.983530] mprotect_fixup+0x8d2/0xb30 [ 30.984039] do_mprotect_pkey+0x87e/0xd40 [ 30.984561] __x64_sys_mprotect+0x78/0xc0 [ 30.985082] do_syscall_64+0x3f/0x90 [ 30.985561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.986212] [ 30.986429] Freed by task 19: [ 30.986811] kasan_save_stack+0x22/0x50 [ 30.987336] kasan_set_track+0x25/0x30 [ 30.987834] kasan_save_free_info+0x2b/0x50 [ 30.988370] __kasan_slab_free+0x10a/0x190 [ 30.988909] kmem_cache_free+0x10d/0x4d0 [ 30.989419] rcu_core+0x8c8/0x2860 [ 30.989869] __do_softirq+0x1b7/0x7d4 [ 30.990347] [ 30.990562] Last potentially related work creation: [ 30.991154] kasan_save_stack+0x22/0x50 [ 30.991661] __kasan_record_aux_stack+0x8e/0xa0 [ 30.992244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.992887] remove_vma+0x139/0x170 [ 30.993345] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.993904] do_vmi_munmap+0x1f1/0x2b0 [ 30.994386] __vm_munmap+0x138/0x3a0 [ 30.994857] __x64_sys_munmap+0x59/0x80 [ 30.995369] do_syscall_64+0x3f/0x90 [ 30.995851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.996492] [ 30.996708] Second to last potentially related work creation: [ 30.997394] kasan_save_stack+0x22/0x50 [ 30.997899] __kasan_record_aux_stack+0x8e/0xa0 [ 30.998483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.999149] remove_vma+0x139/0x170 [ 30.999599] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.000153] do_vmi_munmap+0x1f1/0x2b0 [ 31.000638] mmap_region+0x1f9/0x2660 [ 31.001117] do_mmap+0x854/0xf00 [ 31.001548] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.002036] ksys_mmap_pgoff+0x3af/0x500 [ 31.002641] do_syscall_64+0x3f/0x90 [ 31.003141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.003787] [ 31.004007] The buggy address belongs to the object at ffff88800d771cb0 [ 31.004007] which belongs to the cache vm_area_struct of size 168 [ 31.005476] The buggy address is located 88 bytes inside of [ 31.005476] freed 168-byte region [ffff88800d771cb0, ffff88800d771d58) [ 31.006900] [ 31.007120] The buggy address belongs to the physical page: [ 31.007786] page:000000008ea22ee0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd771 [ 31.008876] memcg:ffff88800d735301 [ 31.009301] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.009951] page_type: 0xffffffff() [ 31.010397] raw: 0100000000000200 ffff8880087a0c80 ffffea000040a5c0 dead000000000008 [ 31.011330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d735301 [ 31.012239] page dumped because: kasan: bad access detected [ 31.012900] [ 31.013114] Memory state around the buggy address: [ 31.013693] ffff88800d771c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.014558] ffff88800d771c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.015447] >ffff88800d771d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.016325] ^ [ 31.016761] ffff88800d771d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.017613] ffff88800d771e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.018467] ================================================================== [ 31.019450] Disabling lock debugging due to kernel taint [ 33.792597] BUG: Bad rss-counter state mm:0000000097438c42 type:MM_FILEPAGES val:33 [ 33.793856] BUG: Bad rss-counter state mm:0000000097438c42 type:MM_ANONPAGES val:22 [ 34.238511] BUG: Bad rss-counter state mm:00000000cfadec50 type:MM_FILEPAGES val:33 [ 34.239230] BUG: Bad rss-counter state mm:00000000cfadec50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9567' (ECDSA) to the list of known hosts. 2023/06/20 18:55:41 fuzzer started 2023/06/20 18:55:41 dialing manager at localhost:36067 2023/06/20 18:55:41 checking machine... 2023/06/20 18:55:41 checking revisions... [ 34.867339] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:55:41 testing simple program... [ 34.905060] cgroup: Unknown subsys name 'net' [ 34.943024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b18ebb RSI=ffffffff83641c44 RDI=ffff8880158c7648 RBP=ffff8880158c7618 RSP=ffff8880158c7570 R8 =0000000000000001 R9 =ffff8880158c75c0 R10=0000000000038001 R11=000000000008ab47 R12=ffff8880158c7648 R13=0000000000000000 R14=ffff888019da0000 R15=ffff88800da07900 RIP=ffffffff813ad47f 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 00007faccc194700 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=00007efc49dd5000 CR3=00000000102c4000 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=63736964203a31313a32323030352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323230 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=ffff888010397760 RCX=ffffffff86129a01 RDX=1ffff11002072eee RSI=ffffffff8450cc7f RDI=ffff888010397770 RBP=ffff888010397730 RSP=ffff888010397678 R8 =ffffffff86129ab2 R9 =ffff8880103976d8 R10=0000000000038001 R11=000000000001e4ed R12=ffff888010397760 R13=0000000000000000 R14=ffff8880164d3680 R15=ffff8880084c6140 RIP=ffffffff813ad496 RFL=00000296 [--S-AP-] 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 00007fd2a755b900 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=00007fd2a7520008 CR3=000000001a284000 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=00000000000000000000000000000000 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