syzkaller login: [ 38.375469] BUG: Bad rss-counter state mm:00000000a122c854 type:MM_FILEPAGES val:33 [ 38.376721] BUG: Bad rss-counter state mm:00000000a122c854 type:MM_ANONPAGES val:22 [ 38.540863] ================================================================== [ 38.541777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.542660] Read of size 8 at addr ffff888019d02228 by task sshd/219 [ 38.543384] [ 38.543592] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.544542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.545452] Call Trace: [ 38.545752] [ 38.546024] dump_stack_lvl+0x91/0xf0 [ 38.546718] print_report+0xcc/0x620 [ 38.547440] ? __virt_addr_valid+0x102/0x340 [ 38.548241] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.549140] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.550042] kasan_report+0xbe/0xf0 [ 38.550735] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.551548] vma_interval_tree_remove+0xc75/0xec0 [ 38.552285] vma_prepare+0xc54/0x11a0 [ 38.552856] __split_vma+0x5af/0x950 [ 38.553426] ? __pfx___split_vma+0x10/0x10 [ 38.554071] ? find_held_lock+0x2c/0x110 [ 38.554704] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.555410] ? lock_is_held_type+0x9f/0x120 [ 38.556056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.556741] ? mtree_range_walk+0x632/0x900 [ 38.557312] ? mas_walk+0x5c7/0x7c0 [ 38.557807] do_vmi_munmap+0x1f1/0x2b0 [ 38.558312] mmap_region+0x1f9/0x2660 [ 38.558807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.559338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.560053] ? __pfx_lock_acquire+0x10/0x10 [ 38.560589] ? __pfx_mmap_region+0x10/0x10 [ 38.561144] ? security_mmap_addr+0x7d/0xa0 [ 38.561696] ? get_unmapped_area+0x1f5/0x3f0 [ 38.562262] do_mmap+0x854/0xf00 [ 38.562710] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.563177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.563737] ksys_mmap_pgoff+0x3af/0x500 [ 38.564217] do_syscall_64+0x3f/0x90 [ 38.564669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.565278] RIP: 0033:0x7ff0656aed82 [ 38.565708] 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 [ 38.567692] RSP: 002b:00007ffe09fad468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.568540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0656aed82 [ 38.569328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff064ae8000 [ 38.570115] RBP: 00007ff064ae8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.570905] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bd7bc7980 [ 38.571703] R13: 00007ffe09fad480 R14: 00007ffe09fad4b0 R15: 00007ffe09fad810 [ 38.572500] [ 38.572775] [ 38.572977] Allocated by task 212: [ 38.573384] kasan_save_stack+0x22/0x50 [ 38.573860] kasan_set_track+0x25/0x30 [ 38.574323] __kasan_slab_alloc+0x59/0x70 [ 38.574817] kmem_cache_alloc+0x16b/0x370 [ 38.575317] vm_area_dup+0x20/0x160 [ 38.575743] __split_vma+0x170/0x950 [ 38.576183] split_vma+0xc6/0x110 [ 38.576597] mprotect_fixup+0x8d2/0xb30 [ 38.577065] do_mprotect_pkey+0x87e/0xd40 [ 38.577550] __x64_sys_mprotect+0x78/0xc0 [ 38.578043] do_syscall_64+0x3f/0x90 [ 38.578490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.579092] [ 38.579307] Freed by task 212: [ 38.579674] kasan_save_stack+0x22/0x50 [ 38.580146] kasan_set_track+0x25/0x30 [ 38.580611] kasan_save_free_info+0x2b/0x50 [ 38.581105] __kasan_slab_free+0x10a/0x190 [ 38.581608] kmem_cache_free+0x10d/0x4d0 [ 38.582084] rcu_core+0x8c8/0x2860 [ 38.582501] __do_softirq+0x1b7/0x7d4 [ 38.582951] [ 38.583153] Last potentially related work creation: [ 38.583715] kasan_save_stack+0x22/0x50 [ 38.584185] __kasan_record_aux_stack+0x8e/0xa0 [ 38.584723] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.585325] remove_vma+0x139/0x170 [ 38.585887] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.586416] do_vmi_munmap+0x1f1/0x2b0 [ 38.586868] __vm_munmap+0x138/0x3a0 [ 38.587323] __x64_sys_munmap+0x59/0x80 [ 38.587788] do_syscall_64+0x3f/0x90 [ 38.588232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.588834] [ 38.589039] The buggy address belongs to the object at ffff888019d021d0 [ 38.589039] which belongs to the cache vm_area_struct of size 168 [ 38.590406] The buggy address is located 88 bytes inside of [ 38.590406] freed 168-byte region [ffff888019d021d0, ffff888019d02278) [ 38.591713] [ 38.591916] The buggy address belongs to the physical page: [ 38.592531] page:000000005cf24897 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d02 [ 38.593550] memcg:ffff88800e23fc01 [ 38.593952] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.594548] page_type: 0xffffffff() [ 38.594969] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.595843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e23fc01 [ 38.596685] page dumped because: kasan: bad access detected [ 38.597301] [ 38.597507] Memory state around the buggy address: [ 38.598047] ffff888019d02100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.598841] ffff888019d02180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.599650] >ffff888019d02200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.600440] ^ [ 38.600963] ffff888019d02280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.601757] ffff888019d02300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.602547] ================================================================== [ 38.603423] Disabling lock debugging due to kernel taint [ 40.514411] BUG: Bad rss-counter state mm:00000000982aa937 type:MM_FILEPAGES val:33 [ 40.515623] BUG: Bad rss-counter state mm:00000000982aa937 type:MM_ANONPAGES val:22 [ 41.045118] BUG: Bad rss-counter state mm:000000004f04a2e8 type:MM_FILEPAGES val:33 [ 41.046297] BUG: Bad rss-counter state mm:000000004f04a2e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2150' (ECDSA) to the list of known hosts. 2023/06/19 21:55:27 fuzzer started 2023/06/19 21:55:27 dialing manager at localhost:44161 2023/06/19 21:55:27 checking machine... 2023/06/19 21:55:27 checking revisions... [ 41.740064] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:55:27 testing simple program... [ 41.790773] cgroup: Unknown subsys name 'net' [ 41.843140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:19 Registers: info registers vcpu 0 RAX=0000000000024091 RBX=0000000000000001 RCX=ffffffff818c86c0 RDX=000000000002409b RSI=0000000000008c86 RDI=ffffffff8614a76e RBP=ffff888014287320 RSP=ffff888014287258 R8 =ffffffff8614a732 R9 =ffff888014287308 R10=0000000000038001 R11=0000000000024091 R12=ffff888014287328 R13=ffff888014287310 R14=ffff888014287309 R15=ffff8880142872c8 RIP=ffffffff81130868 RFL=00000283 [--S---C] 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 00007f396327f900 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=00007f0543bc2650 CR3=000000000db94000 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=16724658112f7bec00000000000ae988 XMM05=c2f598d359462a920000000000134a20 XMM06=806171799158d9670000000000133810 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=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=00007ffe114bf2d8 CR3=000000000df48000 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=2036323a35353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a35353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000