syzkaller login: [ 31.600488] BUG: Bad rss-counter state mm:000000003a7e41c9 type:MM_FILEPAGES val:33 [ 31.601514] BUG: Bad rss-counter state mm:000000003a7e41c9 type:MM_ANONPAGES val:22 [ 31.762837] ================================================================== [ 31.763756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.764727] Read of size 8 at addr ffff88800e9e7228 by task sshd/220 [ 31.765595] [ 31.765820] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.766685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.767658] Call Trace: [ 31.767986] [ 31.768269] dump_stack_lvl+0x91/0xf0 [ 31.768777] print_report+0xcc/0x620 [ 31.769259] ? __virt_addr_valid+0x102/0x340 [ 31.769807] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.770425] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.771038] kasan_report+0xbe/0xf0 [ 31.771516] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.772137] vma_interval_tree_remove+0xc75/0xec0 [ 31.772768] vma_prepare+0xc54/0x11a0 [ 31.773244] __split_vma+0x5af/0x950 [ 31.773724] ? __pfx___split_vma+0x10/0x10 [ 31.774261] ? find_held_lock+0x2c/0x110 [ 31.774788] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.775358] ? lock_is_held_type+0x9f/0x120 [ 31.775899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.776510] ? mtree_range_walk+0x632/0x900 [ 31.777075] ? mas_walk+0x5c7/0x7c0 [ 31.777554] do_vmi_munmap+0x1f1/0x2b0 [ 31.778048] mmap_region+0x1f9/0x2660 [ 31.778535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.779046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.779755] ? __pfx_lock_acquire+0x10/0x10 [ 31.780290] ? __pfx_mmap_region+0x10/0x10 [ 31.780829] ? security_mmap_addr+0x7d/0xa0 [ 31.781358] ? get_unmapped_area+0x1f5/0x3f0 [ 31.781914] do_mmap+0x854/0xf00 [ 31.782356] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.782860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.783427] ksys_mmap_pgoff+0x3af/0x500 [ 31.783932] do_syscall_64+0x3f/0x90 [ 31.784413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.785084] RIP: 0033:0x7f455a9e0d82 [ 31.785546] 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 [ 31.787662] RSP: 002b:00007ffffaf20208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.788563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f455a9e0d82 [ 31.789424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4559e1a000 [ 31.790276] RBP: 00007f4559e1a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.791136] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ad6f96ec0 [ 31.792000] R13: 00007ffffaf20220 R14: 00007ffffaf20250 R15: 00007ffffaf205b0 [ 31.792866] [ 31.793161] [ 31.793377] Allocated by task 213: [ 31.793814] kasan_save_stack+0x22/0x50 [ 31.794315] kasan_set_track+0x25/0x30 [ 31.794811] __kasan_slab_alloc+0x59/0x70 [ 31.795338] kmem_cache_alloc+0x16b/0x370 [ 31.795865] vm_area_dup+0x20/0x160 [ 31.796317] __split_vma+0x170/0x950 [ 31.796803] split_vma+0xc6/0x110 [ 31.797243] mprotect_fixup+0x8d2/0xb30 [ 31.797750] do_mprotect_pkey+0x87e/0xd40 [ 31.798271] __x64_sys_mprotect+0x78/0xc0 [ 31.798796] do_syscall_64+0x3f/0x90 [ 31.799273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.799918] [ 31.800133] Freed by task 210: [ 31.800532] kasan_save_stack+0x22/0x50 [ 31.801058] kasan_set_track+0x25/0x30 [ 31.801553] kasan_save_free_info+0x2b/0x50 [ 31.802091] __kasan_slab_free+0x10a/0x190 [ 31.802626] kmem_cache_free+0x10d/0x4d0 [ 31.803133] rcu_core+0x8c8/0x2860 [ 31.803581] __do_softirq+0x1b7/0x7d4 [ 31.804059] [ 31.804272] Last potentially related work creation: [ 31.804873] kasan_save_stack+0x22/0x50 [ 31.805381] __kasan_record_aux_stack+0x8e/0xa0 [ 31.805959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.806604] remove_vma+0x139/0x170 [ 31.807056] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.807614] do_vmi_munmap+0x1f1/0x2b0 [ 31.808100] __vm_munmap+0x138/0x3a0 [ 31.808570] __x64_sys_munmap+0x59/0x80 [ 31.809085] do_syscall_64+0x3f/0x90 [ 31.809561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.810207] [ 31.810425] The buggy address belongs to the object at ffff88800e9e71d0 [ 31.810425] which belongs to the cache vm_area_struct of size 168 [ 31.811903] The buggy address is located 88 bytes inside of [ 31.811903] freed 168-byte region [ffff88800e9e71d0, ffff88800e9e7278) [ 31.813318] [ 31.813531] The buggy address belongs to the physical page: [ 31.814189] page:00000000f6b335b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9e7 [ 31.815268] memcg:ffff88801954e001 [ 31.815696] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.816346] page_type: 0xffffffff() [ 31.816819] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.817741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801954e001 [ 31.818648] page dumped because: kasan: bad access detected [ 31.819305] [ 31.819517] Memory state around the buggy address: [ 31.820090] ffff88800e9e7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.820946] ffff88800e9e7180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.821798] >ffff88800e9e7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.822647] ^ [ 31.823199] ffff88800e9e7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.824049] ffff88800e9e7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.824903] ================================================================== [ 31.825891] Disabling lock debugging due to kernel taint [ 34.215875] BUG: Bad rss-counter state mm:000000004c3f75a9 type:MM_FILEPAGES val:33 [ 34.216907] BUG: Bad rss-counter state mm:000000004c3f75a9 type:MM_ANONPAGES val:22 [ 34.670472] BUG: Bad rss-counter state mm:000000004032cfb4 type:MM_FILEPAGES val:33 [ 34.671448] BUG: Bad rss-counter state mm:000000004032cfb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51319' (ECDSA) to the list of known hosts. 2023/06/20 03:25:48 fuzzer started 2023/06/20 03:25:49 dialing manager at localhost:44161 2023/06/20 03:25:49 checking machine... 2023/06/20 03:25:49 checking revisions... [ 35.362297] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:25:49 testing simple program... [ 35.414810] cgroup: Unknown subsys name 'net' [ 35.456335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:25:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888017eb9130 RCX=ffffffff818465f5 RDX=1ffff11002fd722e RSI=0000000000000004 RDI=ffff888017eb9170 RBP=ffff8880146cf8b0 RSP=ffff8880146cf870 R8 =0000000000000001 R9 =ffffed1002fd7238 R10=ffff888017eb91c3 R11=0030733a745f6c65 R12=ffff888008441500 R13=ffffea0000395d00 R14=ffffffff81eeb050 R15=1ffff110028d9f1d RIP=ffffffff81846623 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 00007fe31ef6b900 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=00007fbafc7b1650 CR3=000000000ca72000 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=a9ab2660c8446cb01a4b1f02da1536d6 XMM02=000000000011f1c0eff9b2d0a8fce9cb XMM03=000000000011f2902c67c8bc2e329bc3 XMM04=90c22d0ffe30fa1b00000000000ae988 XMM05=9c6cfbaee53f793600000000001345c0 XMM06=4fda316b135da52b00000000001333b0 XMM07=fb795ef6d657705600000000001239d0 XMM08=2c67c8bc2e329bc3000000000011f230 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007ffe8344fb48 CR3=0000000016bb0000 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=2038343a35323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a35323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000