syzkaller login: [ 39.161801] BUG: Bad rss-counter state mm:0000000036f80b6e type:MM_FILEPAGES val:33 [ 39.163068] BUG: Bad rss-counter state mm:0000000036f80b6e type:MM_ANONPAGES val:22 [ 39.313751] ================================================================== [ 39.314838] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.315775] Read of size 8 at addr ffff88800d5b2a50 by task sshd/220 [ 39.316695] [ 39.316921] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.317787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.318786] Call Trace: [ 39.319113] [ 39.319399] dump_stack_lvl+0x91/0xf0 [ 39.319895] print_report+0xcc/0x620 [ 39.320381] ? __virt_addr_valid+0x102/0x340 [ 39.320931] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.321547] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.322191] kasan_report+0xbe/0xf0 [ 39.322667] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.323315] vma_interval_tree_remove+0xc75/0xec0 [ 39.323935] vma_prepare+0xc54/0x11a0 [ 39.324432] __split_vma+0x5af/0x950 [ 39.324922] ? __pfx___split_vma+0x10/0x10 [ 39.325472] ? find_held_lock+0x2c/0x110 [ 39.326048] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.326647] ? lock_is_held_type+0x9f/0x120 [ 39.327210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.327837] ? mtree_range_walk+0x632/0x900 [ 39.328409] ? mas_walk+0x5c7/0x7c0 [ 39.328902] do_vmi_munmap+0x1f1/0x2b0 [ 39.329420] mmap_region+0x1f9/0x2660 [ 39.329923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.330471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.331226] ? __pfx_lock_acquire+0x10/0x10 [ 39.331784] ? __pfx_mmap_region+0x10/0x10 [ 39.332335] ? security_mmap_addr+0x7d/0xa0 [ 39.332893] ? get_unmapped_area+0x1f5/0x3f0 [ 39.333457] do_mmap+0x854/0xf00 [ 39.333907] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.334429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.335015] ksys_mmap_pgoff+0x3af/0x500 [ 39.335540] do_syscall_64+0x3f/0x90 [ 39.336040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.336712] RIP: 0033:0x7feccc19dd82 [ 39.337194] 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 [ 39.339430] RSP: 002b:00007ffcfbc9a538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.340380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feccc19dd82 [ 39.341272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feccb5d7000 [ 39.342164] RBP: 00007feccb5d7000 R08: 0000000000000009 R09: 0000000000001000 [ 39.343049] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636c8470ec0 [ 39.343927] R13: 00007ffcfbc9a550 R14: 00007ffcfbc9a580 R15: 00007ffcfbc9a8e0 [ 39.344822] [ 39.345125] [ 39.345342] Allocated by task 212: [ 39.345784] kasan_save_stack+0x22/0x50 [ 39.346335] kasan_set_track+0x25/0x30 [ 39.346845] __kasan_slab_alloc+0x59/0x70 [ 39.347399] kmem_cache_alloc+0x16b/0x370 [ 39.347939] vm_area_dup+0x20/0x160 [ 39.348404] __split_vma+0x170/0x950 [ 39.348889] split_vma+0xc6/0x110 [ 39.349344] mprotect_fixup+0x8d2/0xb30 [ 39.349864] do_mprotect_pkey+0x87e/0xd40 [ 39.350418] __x64_sys_mprotect+0x78/0xc0 [ 39.350961] do_syscall_64+0x3f/0x90 [ 39.351454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.352118] [ 39.352339] Freed by task 212: [ 39.352750] kasan_save_stack+0x22/0x50 [ 39.353273] kasan_set_track+0x25/0x30 [ 39.353783] kasan_save_free_info+0x2b/0x50 [ 39.354357] __kasan_slab_free+0x10a/0x190 [ 39.354909] kmem_cache_free+0x10d/0x4d0 [ 39.355429] rcu_core+0x8c8/0x2860 [ 39.355888] __do_softirq+0x1b7/0x7d4 [ 39.356383] [ 39.356599] Last potentially related work creation: [ 39.357207] kasan_save_stack+0x22/0x50 [ 39.357773] __kasan_record_aux_stack+0x8e/0xa0 [ 39.358384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.359048] remove_vma+0x139/0x170 [ 39.359518] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.360099] do_vmi_munmap+0x1f1/0x2b0 [ 39.360609] __vm_munmap+0x138/0x3a0 [ 39.361090] __x64_sys_munmap+0x59/0x80 [ 39.361611] do_syscall_64+0x3f/0x90 [ 39.362114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.362778] [ 39.362999] Second to last potentially related work creation: [ 39.363714] kasan_save_stack+0x22/0x50 [ 39.364237] __kasan_record_aux_stack+0x8e/0xa0 [ 39.364837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.365509] remove_vma+0x139/0x170 [ 39.365990] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.366572] do_vmi_munmap+0x1f1/0x2b0 [ 39.367072] mmap_region+0x1f9/0x2660 [ 39.367561] do_mmap+0x854/0xf00 [ 39.368004] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.368512] ksys_mmap_pgoff+0x3af/0x500 [ 39.369034] do_syscall_64+0x3f/0x90 [ 39.369527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.370198] [ 39.370417] The buggy address belongs to the object at ffff88800d5b29f8 [ 39.370417] which belongs to the cache vm_area_struct of size 168 [ 39.371959] The buggy address is located 88 bytes inside of [ 39.371959] freed 168-byte region [ffff88800d5b29f8, ffff88800d5b2aa0) [ 39.373446] [ 39.373669] The buggy address belongs to the physical page: [ 39.374379] page:000000005be4d742 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5b2 [ 39.375518] memcg:ffff88800cf7ac01 [ 39.375971] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.376697] page_type: 0xffffffff() [ 39.377161] raw: 0100000000000200 ffff88800879fc80 ffffea00003c53c0 dead000000000005 [ 39.378144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf7ac01 [ 39.379089] page dumped because: kasan: bad access detected [ 39.379766] [ 39.379992] Memory state around the buggy address: [ 39.380595] ffff88800d5b2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.381489] ffff88800d5b2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.382399] >ffff88800d5b2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.383270] ^ [ 39.383999] ffff88800d5b2a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 39.384891] ffff88800d5b2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.385785] ================================================================== [ 39.386761] Disabling lock debugging due to kernel taint [ 42.055216] BUG: Bad rss-counter state mm:00000000223dca17 type:MM_FILEPAGES val:33 [ 42.056231] BUG: Bad rss-counter state mm:00000000223dca17 type:MM_ANONPAGES val:22 [ 42.618194] BUG: Bad rss-counter state mm:00000000b97fe210 type:MM_FILEPAGES val:33 [ 42.619179] BUG: Bad rss-counter state mm:00000000b97fe210 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37420' (ECDSA) to the list of known hosts. 2023/06/19 12:59:38 fuzzer started 2023/06/19 12:59:38 dialing manager at localhost:44161 2023/06/19 12:59:39 checking machine... 2023/06/19 12:59:39 checking revisions... [ 43.284226] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:59:39 testing simple program... [ 43.346508] cgroup: Unknown subsys name 'net' [ 43.435124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806192 RDI=ffff88806ce40d70 RBP=ffff88806ce40d70 RSP=ffff888009537ad0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888019123028 R12=ffff8880087b6500 R13=ffffea0000644880 R14=0000000000000000 R15=0000000000000003 RIP=ffffffff812d860e RFL=00000046 [---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 00007f34778da900 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=0000555cd3727954 CR3=000000000e5a2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fd10f3e6018 CR3=000000000d64e000 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=b876f3ff9a623c81524805d3ccb35ddd XMM02=2c67c8bc2e329bc3000000000011d760 XMM03=fb795ef6d65770560000000000124508 XMM04=3d9942914eba138e00000000000ae988 XMM05=59d5b690e0af863b0000000000135c28 XMM06=085971ff14225a4f0000000000135078 XMM07=e042d86d42eb936e00000000001247e0 XMM08=6cf2e8d041a7397c000000000011d7c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000