syzkaller login: [ 30.616197] BUG: Bad rss-counter state mm:000000001e62490a type:MM_FILEPAGES val:33 [ 30.617533] BUG: Bad rss-counter state mm:000000001e62490a type:MM_ANONPAGES val:22 [ 30.777360] ================================================================== [ 30.778344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.779346] Read of size 8 at addr ffff888016afa798 by task sshd/220 [ 30.780270] [ 30.780496] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.781402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.782428] Call Trace: [ 30.782759] [ 30.783057] dump_stack_lvl+0x91/0xf0 [ 30.783619] print_report+0xcc/0x620 [ 30.784135] ? __virt_addr_valid+0x102/0x340 [ 30.784729] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785369] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786030] kasan_report+0xbe/0xf0 [ 30.786534] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787227] vma_interval_tree_remove+0xc75/0xec0 [ 30.787854] vma_prepare+0xc54/0x11a0 [ 30.788366] __split_vma+0x5af/0x950 [ 30.788871] ? __pfx___split_vma+0x10/0x10 [ 30.789422] ? find_held_lock+0x2c/0x110 [ 30.789964] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.790551] ? lock_is_held_type+0x9f/0x120 [ 30.791124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.791755] ? mtree_range_walk+0x632/0x900 [ 30.792330] ? mas_walk+0x5c7/0x7c0 [ 30.792831] do_vmi_munmap+0x1f1/0x2b0 [ 30.793346] mmap_region+0x1f9/0x2660 [ 30.793854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.794387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.795159] ? __pfx_lock_acquire+0x10/0x10 [ 30.795717] ? __pfx_mmap_region+0x10/0x10 [ 30.796268] ? security_mmap_addr+0x7d/0xa0 [ 30.796823] ? get_unmapped_area+0x1f5/0x3f0 [ 30.797405] do_mmap+0x854/0xf00 [ 30.797879] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.798400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.798983] ksys_mmap_pgoff+0x3af/0x500 [ 30.799534] do_syscall_64+0x3f/0x90 [ 30.800033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800704] RIP: 0033:0x7f4695593d82 [ 30.801185] 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 [ 30.803457] RSP: 002b:00007ffd4f6c4378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.804409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4695593d82 [ 30.805288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46949cd000 [ 30.806191] RBP: 00007f46949cd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.807069] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625f6896ec0 [ 30.807979] R13: 00007ffd4f6c4390 R14: 00007ffd4f6c43c0 R15: 00007ffd4f6c4720 [ 30.808869] [ 30.809177] [ 30.809404] Allocated by task 213: [ 30.809858] kasan_save_stack+0x22/0x50 [ 30.810378] kasan_set_track+0x25/0x30 [ 30.810890] __kasan_slab_alloc+0x59/0x70 [ 30.811444] kmem_cache_alloc+0x16b/0x370 [ 30.811988] vm_area_dup+0x20/0x160 [ 30.812471] __split_vma+0x170/0x950 [ 30.812966] split_vma+0xc6/0x110 [ 30.813424] mprotect_fixup+0x8d2/0xb30 [ 30.813965] do_mprotect_pkey+0x87e/0xd40 [ 30.814507] __x64_sys_mprotect+0x78/0xc0 [ 30.815045] do_syscall_64+0x3f/0x90 [ 30.815563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816233] [ 30.816460] Freed by task 213: [ 30.816869] kasan_save_stack+0x22/0x50 [ 30.817404] kasan_set_track+0x25/0x30 [ 30.817926] kasan_save_free_info+0x2b/0x50 [ 30.818479] __kasan_slab_free+0x10a/0x190 [ 30.819043] kmem_cache_free+0x10d/0x4d0 [ 30.819600] rcu_core+0x8c8/0x2860 [ 30.820071] __do_softirq+0x1b7/0x7d4 [ 30.820581] [ 30.820808] Last potentially related work creation: [ 30.821428] kasan_save_stack+0x22/0x50 [ 30.821952] __kasan_record_aux_stack+0x8e/0xa0 [ 30.822558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823256] remove_vma+0x139/0x170 [ 30.823731] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824306] do_vmi_munmap+0x1f1/0x2b0 [ 30.824813] __vm_munmap+0x138/0x3a0 [ 30.825311] __x64_sys_munmap+0x59/0x80 [ 30.825827] do_syscall_64+0x3f/0x90 [ 30.826334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827007] [ 30.827250] The buggy address belongs to the object at ffff888016afa740 [ 30.827250] which belongs to the cache vm_area_struct of size 168 [ 30.828809] The buggy address is located 88 bytes inside of [ 30.828809] freed 168-byte region [ffff888016afa740, ffff888016afa7e8) [ 30.830264] [ 30.830487] The buggy address belongs to the physical page: [ 30.831186] page:00000000e37408a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16afa [ 30.832328] memcg:ffff888015c72401 [ 30.832775] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833467] page_type: 0xffffffff() [ 30.833940] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.834899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c72401 [ 30.835862] page dumped because: kasan: bad access detected [ 30.836557] [ 30.836798] Memory state around the buggy address: [ 30.837403] ffff888016afa680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.838298] ffff888016afa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.839221] >ffff888016afa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.840117] ^ [ 30.840632] ffff888016afa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.841549] ffff888016afa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.842437] ================================================================== [ 30.843466] Disabling lock debugging due to kernel taint [ 32.807276] BUG: Bad rss-counter state mm:000000006e5284ce type:MM_FILEPAGES val:33 [ 32.808334] BUG: Bad rss-counter state mm:000000006e5284ce type:MM_ANONPAGES val:22 [ 33.284768] BUG: Bad rss-counter state mm:000000003931a6ca type:MM_FILEPAGES val:33 [ 33.285274] BUG: Bad rss-counter state mm:000000003931a6ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61394' (ECDSA) to the list of known hosts. 2023/06/20 12:58:01 fuzzer started 2023/06/20 12:58:02 dialing manager at localhost:36067 2023/06/20 12:58:02 checking machine... 2023/06/20 12:58:02 checking revisions... [ 34.043368] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:58:02 testing simple program... [ 34.098545] cgroup: Unknown subsys name 'net' [ 34.135631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:58:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016938000 RSI=ffffffff81ef0fa7 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888016d0fd10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000004 R14=ffff88800eae3680 R15=0000000000000001 RIP=ffffffff814c089b 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 00007f5335e57900 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=00007f533640c650 CR3=000000000eb1a000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007ffe09b1af58 CR3=000000000fdc2000 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=2031303a38353a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a38353a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000