syzkaller login: [ 54.413172] BUG: Bad rss-counter state mm:00000000d26b0cde type:MM_FILEPAGES val:33 [ 54.414198] BUG: Bad rss-counter state mm:00000000d26b0cde type:MM_ANONPAGES val:22 [ 54.586418] ================================================================== [ 54.587363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.588328] Read of size 8 at addr ffff88800c6b0b38 by task sshd/221 [ 54.589250] [ 54.589478] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.590378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.591508] Call Trace: [ 54.591927] <TASK> [ 54.592300] dump_stack_lvl+0x91/0xf0 [ 54.592946] print_report+0xcc/0x620 [ 54.593482] ? __virt_addr_valid+0x102/0x340 [ 54.594085] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.594729] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.595371] kasan_report+0xbe/0xf0 [ 54.595856] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.596499] vma_interval_tree_remove+0xc75/0xec0 [ 54.597145] vma_prepare+0xc54/0x11a0 [ 54.597648] __split_vma+0x5af/0x950 [ 54.598150] ? __pfx___split_vma+0x10/0x10 [ 54.598681] ? find_held_lock+0x2c/0x110 [ 54.599226] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.599796] ? lock_is_held_type+0x9f/0x120 [ 54.600353] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.600961] ? mtree_range_walk+0x632/0x900 [ 54.601547] ? mas_walk+0x5c7/0x7c0 [ 54.602036] do_vmi_munmap+0x1f1/0x2b0 [ 54.602549] mmap_region+0x1f9/0x2660 [ 54.603034] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.603574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.604316] ? __pfx_lock_acquire+0x10/0x10 [ 54.604851] ? __pfx_mmap_region+0x10/0x10 [ 54.605431] ? security_mmap_addr+0x7d/0xa0 [ 54.605994] ? get_unmapped_area+0x1f5/0x3f0 [ 54.606570] do_mmap+0x854/0xf00 [ 54.607014] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.607528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.608105] ksys_mmap_pgoff+0x3af/0x500 [ 54.608622] do_syscall_64+0x3f/0x90 [ 54.609121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.609781] RIP: 0033:0x7f7149db0d82 [ 54.610281] 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 [ 54.612428] RSP: 002b:00007fff33e9c298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.613378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7149db0d82 [ 54.614285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71491ea000 [ 54.615174] RBP: 00007f71491ea000 R08: 0000000000000009 R09: 0000000000001000 [ 54.616037] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563449890ec0 [ 54.616892] R13: 00007fff33e9c2b0 R14: 00007fff33e9c2e0 R15: 00007fff33e9c640 [ 54.617784] </TASK> [ 54.618101] [ 54.618332] Allocated by task 214: [ 54.618771] kasan_save_stack+0x22/0x50 [ 54.619303] kasan_set_track+0x25/0x30 [ 54.619800] __kasan_slab_alloc+0x59/0x70 [ 54.620351] kmem_cache_alloc+0x16b/0x370 [ 54.620871] vm_area_dup+0x20/0x160 [ 54.621337] __split_vma+0x170/0x950 [ 54.621812] split_vma+0xc6/0x110 [ 54.622265] mprotect_fixup+0x8d2/0xb30 [ 54.622775] do_mprotect_pkey+0x87e/0xd40 [ 54.623322] __x64_sys_mprotect+0x78/0xc0 [ 54.623859] do_syscall_64+0x3f/0x90 [ 54.624346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.624994] [ 54.625223] Freed by task 214: [ 54.625617] kasan_save_stack+0x22/0x50 [ 54.626169] kasan_set_track+0x25/0x30 [ 54.626666] kasan_save_free_info+0x2b/0x50 [ 54.627229] __kasan_slab_free+0x10a/0x190 [ 54.627771] kmem_cache_free+0x10d/0x4d0 [ 54.628299] rcu_core+0x8c8/0x2860 [ 54.628753] __do_softirq+0x1b7/0x7d4 [ 54.629261] [ 54.629483] Last potentially related work creation: [ 54.630087] kasan_save_stack+0x22/0x50 [ 54.630600] __kasan_record_aux_stack+0x8e/0xa0 [ 54.631183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.631826] remove_vma+0x139/0x170 [ 54.632311] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.632863] do_vmi_munmap+0x1f1/0x2b0 [ 54.633362] __vm_munmap+0x138/0x3a0 [ 54.633857] __x64_sys_munmap+0x59/0x80 [ 54.634378] do_syscall_64+0x3f/0x90 [ 54.634855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.635518] [ 54.635740] The buggy address belongs to the object at ffff88800c6b0ae0 [ 54.635740] which belongs to the cache vm_area_struct of size 168 [ 54.637264] The buggy address is located 88 bytes inside of [ 54.637264] freed 168-byte region [ffff88800c6b0ae0, ffff88800c6b0b88) [ 54.638706] [ 54.638924] The buggy address belongs to the physical page: [ 54.639614] page:0000000057bf8694 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6b0 [ 54.640718] memcg:ffff888019baa801 [ 54.641178] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.641858] page_type: 0xffffffff() [ 54.642327] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.643269] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019baa801 [ 54.644202] page dumped because: kasan: bad access detected [ 54.644873] [ 54.645107] Memory state around the buggy address: [ 54.645698] ffff88800c6b0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.646601] ffff88800c6b0a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 54.647492] >ffff88800c6b0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.648370] ^ [ 54.648987] ffff88800c6b0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 54.649901] ffff88800c6b0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 54.650779] ================================================================== [ 54.651886] Disabling lock debugging due to kernel taint [ 56.768290] BUG: Bad rss-counter state mm:000000003056b8de type:MM_FILEPAGES val:33 [ 56.769484] BUG: Bad rss-counter state mm:000000003056b8de type:MM_ANONPAGES val:22 [ 57.168325] BUG: Bad rss-counter state mm:00000000755469bf type:MM_FILEPAGES val:33 [ 57.169325] BUG: Bad rss-counter state mm:00000000755469bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24581' (ECDSA) to the list of known hosts. 2023/06/20 02:29:21 fuzzer started 2023/06/20 02:29:21 dialing manager at localhost:44161 2023/06/20 02:29:21 checking machine... 2023/06/20 02:29:21 checking revisions... [ 57.916688] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:29:21 testing simple program... [ 57.973770] cgroup: Unknown subsys name 'net' [ 58.026769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff5b681ca00 CR3=000000000e970000 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=2031323a39323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888014509b40 RSI=ffffffff811431f6 RDI=0000000000000006 RBP=0000000016b18ec0 RSP=ffff88800ff37840 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000800 R14=0000000000000000 R15=ffff88800ea7fc80 RIP=ffffffff814c0800 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 00007fbefcd15900 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=00007ffcec487000 CR3=000000000c50e000 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=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