syzkaller login: [ 34.119796] BUG: Bad rss-counter state mm:00000000de9785e2 type:MM_FILEPAGES val:33 [ 34.121100] BUG: Bad rss-counter state mm:00000000de9785e2 type:MM_ANONPAGES val:22 [ 34.280576] ================================================================== [ 34.281573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.282622] Read of size 8 at addr ffff88800bb03058 by task sshd/220 [ 34.283460] [ 34.283699] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.284719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.285798] Call Trace: [ 34.286162] [ 34.286495] dump_stack_lvl+0x91/0xf0 [ 34.287044] print_report+0xcc/0x620 [ 34.287581] ? __virt_addr_valid+0x102/0x340 [ 34.288191] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.288863] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.289544] kasan_report+0xbe/0xf0 [ 34.290076] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.290771] vma_interval_tree_remove+0xc75/0xec0 [ 34.291431] vma_prepare+0xc54/0x11a0 [ 34.291963] __split_vma+0x5af/0x950 [ 34.292482] ? __pfx___split_vma+0x10/0x10 [ 34.293061] ? find_held_lock+0x2c/0x110 [ 34.293629] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.294273] ? lock_is_held_type+0x9f/0x120 [ 34.294872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.295538] ? mtree_range_walk+0x632/0x900 [ 34.296139] ? mas_walk+0x5c7/0x7c0 [ 34.296656] do_vmi_munmap+0x1f1/0x2b0 [ 34.297195] mmap_region+0x1f9/0x2660 [ 34.297721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.298290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.299084] ? __pfx_lock_acquire+0x10/0x10 [ 34.299666] ? __pfx_mmap_region+0x10/0x10 [ 34.300245] ? security_mmap_addr+0x7d/0xa0 [ 34.300828] ? get_unmapped_area+0x1f5/0x3f0 [ 34.301424] do_mmap+0x854/0xf00 [ 34.301906] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.302455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.303068] ksys_mmap_pgoff+0x3af/0x500 [ 34.303620] do_syscall_64+0x3f/0x90 [ 34.304141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.304848] RIP: 0033:0x7f68f5963d82 [ 34.305354] 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 [ 34.307706] RSP: 002b:00007ffd05c42868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.308714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68f5963d82 [ 34.309653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68f4d9d000 [ 34.310574] RBP: 00007f68f4d9d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.311478] R10: 0000000000000812 R11: 0000000000000206 R12: 000055998ea42ec0 [ 34.312391] R13: 00007ffd05c42880 R14: 00007ffd05c428b0 R15: 00007ffd05c42c10 [ 34.313307] [ 34.313617] [ 34.313850] Allocated by task 213: [ 34.314320] kasan_save_stack+0x22/0x50 [ 34.314861] kasan_set_track+0x25/0x30 [ 34.315402] __kasan_slab_alloc+0x59/0x70 [ 34.315970] kmem_cache_alloc+0x16b/0x370 [ 34.316512] vm_area_dup+0x20/0x160 [ 34.317004] __split_vma+0x170/0x950 [ 34.317518] split_vma+0xc6/0x110 [ 34.318000] mprotect_fixup+0x8d2/0xb30 [ 34.318575] do_mprotect_pkey+0x87e/0xd40 [ 34.319151] __x64_sys_mprotect+0x78/0xc0 [ 34.319727] do_syscall_64+0x3f/0x90 [ 34.320256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.320963] [ 34.321200] Freed by task 213: [ 34.321635] kasan_save_stack+0x22/0x50 [ 34.322191] kasan_set_track+0x25/0x30 [ 34.322753] kasan_save_free_info+0x2b/0x50 [ 34.323345] __kasan_slab_free+0x10a/0x190 [ 34.323933] kmem_cache_free+0x10d/0x4d0 [ 34.324497] rcu_core+0x8c8/0x2860 [ 34.324991] __do_softirq+0x1b7/0x7d4 [ 34.325521] [ 34.325759] Last potentially related work creation: [ 34.326421] kasan_save_stack+0x22/0x50 [ 34.326972] __kasan_record_aux_stack+0x8e/0xa0 [ 34.327608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.328319] remove_vma+0x139/0x170 [ 34.328816] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.329433] do_vmi_munmap+0x1f1/0x2b0 [ 34.329972] __vm_munmap+0x138/0x3a0 [ 34.330490] __x64_sys_munmap+0x59/0x80 [ 34.331038] do_syscall_64+0x3f/0x90 [ 34.331559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.332257] [ 34.332496] The buggy address belongs to the object at ffff88800bb03000 [ 34.332496] which belongs to the cache vm_area_struct of size 168 [ 34.334125] The buggy address is located 88 bytes inside of [ 34.334125] freed 168-byte region [ffff88800bb03000, ffff88800bb030a8) [ 34.335678] [ 34.335916] The buggy address belongs to the physical page: [ 34.336647] page:00000000420e4555 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbb03 [ 34.337846] memcg:ffff888018e18701 [ 34.338335] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.339062] page_type: 0xffffffff() [ 34.339568] raw: 0100000000000200 ffff88800879fc80 ffffea00003a33c0 dead000000000006 [ 34.340588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e18701 [ 34.341584] page dumped because: kasan: bad access detected [ 34.342322] [ 34.342561] Memory state around the buggy address: [ 34.343205] ffff88800bb02f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.344155] ffff88800bb02f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.345104] >ffff88800bb03000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.346049] ^ [ 34.346878] ffff88800bb03080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.347857] ffff88800bb03100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.348808] ================================================================== [ 34.350270] Disabling lock debugging due to kernel taint [ 36.181344] BUG: Bad rss-counter state mm:000000005581bddb type:MM_FILEPAGES val:33 [ 36.182181] BUG: Bad rss-counter state mm:000000005581bddb type:MM_ANONPAGES val:22 [ 36.646045] BUG: Bad rss-counter state mm:0000000093168f89 type:MM_FILEPAGES val:33 [ 36.647198] BUG: Bad rss-counter state mm:0000000093168f89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5984' (ECDSA) to the list of known hosts. 2023/06/19 14:28:58 fuzzer started 2023/06/19 14:28:58 dialing manager at localhost:44161 2023/06/19 14:28:58 checking machine... 2023/06/19 14:28:58 checking revisions... [ 37.322694] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:28:58 testing simple program... [ 37.376309] cgroup: Unknown subsys name 'net' [ 37.414589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:28:54 Registers: info registers vcpu 0 RAX=ffff88801674f4a8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801674f401 RSI=ffff88801674f440 RDI=ffff88801674f440 RBP=ffff88801674f130 RSP=ffff88801674f068 R8 =0000000000000001 R9 =ffff88801674f118 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801674f138 R13=ffff88801674f120 R14=ffff88801674f440 R15=ffff88801674f0d8 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f8717867900 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=00007fff36782000 CR3=000000000fd6a000 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=ffff888008c58400 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=00007f5efe132000 CR3=000000000ce3c000 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=2037353a38323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a38323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000