syzkaller login: [ 30.552989] BUG: Bad rss-counter state mm:00000000f6f6685e type:MM_FILEPAGES val:33 [ 30.554161] BUG: Bad rss-counter state mm:00000000f6f6685e type:MM_ANONPAGES val:22 [ 30.592702] ================================================================== [ 30.593682] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.594617] Read of size 8 at addr ffff88801012f310 by task sshd/220 [ 30.595416] [ 30.595623] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.596427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.597375] Call Trace: [ 30.597675] [ 30.597946] dump_stack_lvl+0x91/0xf0 [ 30.598419] print_report+0xcc/0x620 [ 30.598878] ? __virt_addr_valid+0x102/0x340 [ 30.599397] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.599986] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.600565] kasan_report+0xbe/0xf0 [ 30.601015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.601602] vma_interval_tree_remove+0xc75/0xec0 [ 30.602212] vma_prepare+0xc54/0x11a0 [ 30.602689] __split_vma+0x5af/0x950 [ 30.603155] ? __pfx___split_vma+0x10/0x10 [ 30.603683] ? find_held_lock+0x2c/0x110 [ 30.604200] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.604760] ? lock_is_held_type+0x9f/0x120 [ 30.605301] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.605907] ? mtree_range_walk+0x632/0x900 [ 30.606469] ? mas_walk+0x5c7/0x7c0 [ 30.606937] do_vmi_munmap+0x1f1/0x2b0 [ 30.607422] mmap_region+0x1f9/0x2660 [ 30.607904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.608412] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.609136] ? __pfx_lock_acquire+0x10/0x10 [ 30.609664] ? __pfx_mmap_region+0x10/0x10 [ 30.610219] ? security_mmap_addr+0x7d/0xa0 [ 30.610745] ? get_unmapped_area+0x1f5/0x3f0 [ 30.611290] do_mmap+0x854/0xf00 [ 30.611718] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.612217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.612771] ksys_mmap_pgoff+0x3af/0x500 [ 30.613276] do_syscall_64+0x3f/0x90 [ 30.613753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.614411] RIP: 0033:0x7f21bb0a0d82 [ 30.614857] 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 [ 30.616979] RSP: 002b:00007ffeb4829368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.617885] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21bb0a0d82 [ 30.618733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21ba4da000 [ 30.619570] RBP: 00007f21ba4da000 R08: 0000000000000009 R09: 0000000000001000 [ 30.620402] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ab8880f70 [ 30.621258] R13: 00007ffeb4829380 R14: 00007ffeb48293b0 R15: 00007ffeb4829710 [ 30.622118] [ 30.622460] [ 30.622680] Allocated by task 213: [ 30.623116] kasan_save_stack+0x22/0x50 [ 30.623621] kasan_set_track+0x25/0x30 [ 30.624125] __kasan_slab_alloc+0x59/0x70 [ 30.624654] kmem_cache_alloc+0x16b/0x370 [ 30.625176] vm_area_dup+0x20/0x160 [ 30.625637] __split_vma+0x170/0x950 [ 30.626115] split_vma+0xc6/0x110 [ 30.626566] mprotect_fixup+0x8d2/0xb30 [ 30.627079] do_mprotect_pkey+0x87e/0xd40 [ 30.627611] __x64_sys_mprotect+0x78/0xc0 [ 30.628136] do_syscall_64+0x3f/0x90 [ 30.628613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.629261] [ 30.629475] Freed by task 213: [ 30.629876] kasan_save_stack+0x22/0x50 [ 30.630401] kasan_set_track+0x25/0x30 [ 30.630901] kasan_save_free_info+0x2b/0x50 [ 30.631444] __kasan_slab_free+0x10a/0x190 [ 30.631981] kmem_cache_free+0x10d/0x4d0 [ 30.632493] rcu_core+0x8c8/0x2860 [ 30.632941] __do_softirq+0x1b7/0x7d4 [ 30.633417] [ 30.633642] Last potentially related work creation: [ 30.634241] kasan_save_stack+0x22/0x50 [ 30.634747] __kasan_record_aux_stack+0x8e/0xa0 [ 30.635326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.635978] remove_vma+0x139/0x170 [ 30.636439] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.637013] do_vmi_munmap+0x1f1/0x2b0 [ 30.637503] __vm_munmap+0x138/0x3a0 [ 30.637967] __x64_sys_munmap+0x59/0x80 [ 30.638487] do_syscall_64+0x3f/0x90 [ 30.638962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.639612] [ 30.639838] The buggy address belongs to the object at ffff88801012f2b8 [ 30.639838] which belongs to the cache vm_area_struct of size 168 [ 30.641332] The buggy address is located 88 bytes inside of [ 30.641332] freed 168-byte region [ffff88801012f2b8, ffff88801012f360) [ 30.642760] [ 30.642980] The buggy address belongs to the physical page: [ 30.643650] page:0000000053fa99d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1012f [ 30.644765] memcg:ffff888016100101 [ 30.645197] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.645842] page_type: 0xffffffff() [ 30.646308] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.647229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016100101 [ 30.648135] page dumped because: kasan: bad access detected [ 30.648789] [ 30.649010] Memory state around the buggy address: [ 30.649590] ffff88801012f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.650457] ffff88801012f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.651314] >ffff88801012f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.652170] ^ [ 30.652640] ffff88801012f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.653508] ffff88801012f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.654392] ================================================================== [ 30.655765] Disabling lock debugging due to kernel taint [ 32.824916] BUG: Bad rss-counter state mm:00000000d4d78033 type:MM_FILEPAGES val:33 [ 32.826111] BUG: Bad rss-counter state mm:00000000d4d78033 type:MM_ANONPAGES val:22 [ 33.304928] BUG: Bad rss-counter state mm:000000005e6be3f6 type:MM_FILEPAGES val:33 [ 33.305938] BUG: Bad rss-counter state mm:000000005e6be3f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47612' (ECDSA) to the list of known hosts. 2023/06/20 12:24:09 fuzzer started 2023/06/20 12:24:09 dialing manager at localhost:36067 2023/06/20 12:24:09 checking machine... 2023/06/20 12:24:09 checking revisions... [ 33.946910] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:24:09 testing simple program... [ 33.992361] cgroup: Unknown subsys name 'net' [ 34.041026] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:09 Registers: info registers vcpu 0 RAX=00007fc0cb21e6a0 RBX=0000562ab66cdeb0 RCX=000000000000002f RDX=00007fc0cb2224a0 RSI=00007fc0cac4ab22 RDI=0000562ab66cdeb0 RBP=000000000000001a RSP=00007ffea94491b8 R8 =0000562ab66fa3ba R9 =00007fc0cb221be0 R10=0000000000100000 R11=0000000000000246 R12=0000562ab66ebed0 R13=00007ffea94491c8 R14=00007fc0cac4ab22 R15=00007fc0cac6f710 RIP=00007fc0cb1bf4c3 RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc0cac6f900 00000000 00000000 GS =0000 0000000000000000 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=00007fc0cb224650 CR3=000000000cc3a000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=0000000000ffff000000000000000000 XMM03=20202020202020205249445f4c49414d XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=612064646100006c69616d2f7261762f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=0000562ab66f8768 CR3=00000000199aa000 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=2038303a34323a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a34323a3231203032 XMM08=00007f516c0159400000005d00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000