[ 23.726630] BUG: Bad rss-counter state mm:00000000544c6b76 type:MM_FILEPAGES val:33 [ 23.727709] BUG: Bad rss-counter state mm:00000000544c6b76 type:MM_ANONPAGES val:22 [ 23.893712] ================================================================== [ 23.894623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.895577] Read of size 8 at addr ffff88800ed28228 by task sshd/220 [ 23.896346] [ 23.896689] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.897568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.898565] Call Trace: [ 23.899029] [ 23.899324] dump_stack_lvl+0x91/0xf0 [ 23.899818] print_report+0xcc/0x620 [ 23.900319] ? __virt_addr_valid+0x102/0x340 [ 23.900873] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.901499] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.902121] kasan_report+0xbe/0xf0 [ 23.902594] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.903234] vma_interval_tree_remove+0xc75/0xec0 [ 23.903846] vma_prepare+0xc54/0x11a0 [ 23.904320] __split_vma+0x5af/0x950 [ 23.904785] ? __pfx___split_vma+0x10/0x10 [ 23.905317] ? find_held_lock+0x2c/0x110 [ 23.905832] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.906395] ? lock_is_held_type+0x9f/0x120 [ 23.906939] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.907545] ? mtree_range_walk+0x632/0x900 [ 23.908104] ? mas_walk+0x5c7/0x7c0 [ 23.908584] do_vmi_munmap+0x1f1/0x2b0 [ 23.909081] mmap_region+0x1f9/0x2660 [ 23.909564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.910078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.910787] ? __pfx_lock_acquire+0x10/0x10 [ 23.911334] ? __pfx_mmap_region+0x10/0x10 [ 23.911863] ? security_mmap_addr+0x7d/0xa0 [ 23.912391] ? get_unmapped_area+0x1f5/0x3f0 [ 23.912938] do_mmap+0x854/0xf00 [ 23.913380] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.913871] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.914428] ksys_mmap_pgoff+0x3af/0x500 [ 23.914963] do_syscall_64+0x3f/0x90 [ 23.915440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.916084] RIP: 0033:0x7f0693618d82 [ 23.916540] 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 [ 23.918664] RSP: 002b:00007fff343dbc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.919592] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0693618d82 [ 23.920440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0692a52000 [ 23.921284] RBP: 00007f0692a52000 R08: 0000000000000009 R09: 0000000000001000 [ 23.922125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5e537dec0 [ 23.922985] R13: 00007fff343dbca0 R14: 00007fff343dbcd0 R15: 00007fff343dc030 [ 23.923840] [ 23.924133] [ 23.924351] Allocated by task 213: [ 23.924776] kasan_save_stack+0x22/0x50 [ 23.925280] kasan_set_track+0x25/0x30 [ 23.925774] __kasan_slab_alloc+0x59/0x70 [ 23.926296] kmem_cache_alloc+0x16b/0x370 [ 23.926816] vm_area_dup+0x20/0x160 [ 23.927283] __split_vma+0x170/0x950 [ 23.927757] split_vma+0xc6/0x110 [ 23.928193] mprotect_fixup+0x8d2/0xb30 [ 23.928700] do_mprotect_pkey+0x87e/0xd40 [ 23.929225] __x64_sys_mprotect+0x78/0xc0 [ 23.929750] do_syscall_64+0x3f/0x90 [ 23.930227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.930886] [ 23.931119] Freed by task 13: [ 23.931501] kasan_save_stack+0x22/0x50 [ 23.932008] kasan_set_track+0x25/0x30 [ 23.932499] kasan_save_free_info+0x2b/0x50 [ 23.933042] __kasan_slab_free+0x10a/0x190 [ 23.933569] kmem_cache_free+0x10d/0x4d0 [ 23.934076] rcu_core+0x8c8/0x2860 [ 23.934520] __do_softirq+0x1b7/0x7d4 [ 23.935023] [ 23.935242] Last potentially related work creation: [ 23.935826] kasan_save_stack+0x22/0x50 [ 23.936331] __kasan_record_aux_stack+0x8e/0xa0 [ 23.936901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.937549] remove_vma+0x139/0x170 [ 23.938004] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.938561] do_vmi_munmap+0x1f1/0x2b0 [ 23.939051] __vm_munmap+0x138/0x3a0 [ 23.939523] __x64_sys_munmap+0x59/0x80 [ 23.940016] do_syscall_64+0x3f/0x90 [ 23.940494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.941139] [ 23.941351] The buggy address belongs to the object at ffff88800ed281d0 [ 23.941351] which belongs to the cache vm_area_struct of size 168 [ 23.942818] The buggy address is located 88 bytes inside of [ 23.942818] freed 168-byte region [ffff88800ed281d0, ffff88800ed28278) [ 23.944238] [ 23.944459] The buggy address belongs to the physical page: [ 23.945115] page:000000004bf63580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed28 [ 23.946200] memcg:ffff888014053901 [ 23.946633] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.947342] page_type: 0xffffffff() [ 23.947792] raw: 0100000000000200 ffff8880087a0c80 ffffea00003260c0 dead000000000005 [ 23.948710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014053901 [ 23.949619] page dumped because: kasan: bad access detected [ 23.950276] [ 23.950497] Memory state around the buggy address: [ 23.951091] ffff88800ed28100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.951950] ffff88800ed28180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.952809] >ffff88800ed28200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.953673] ^ [ 23.954234] ffff88800ed28280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.955097] ffff88800ed28300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.955954] ================================================================== [ 23.957187] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.924259] BUG: Bad rss-counter state mm:0000000062cfda7a type:MM_FILEPAGES val:33 [ 25.925275] BUG: Bad rss-counter state mm:0000000062cfda7a type:MM_ANONPAGES val:22 [ 26.384473] BUG: Bad rss-counter state mm:00000000286f0c14 type:MM_FILEPAGES val:33 [ 26.385495] BUG: Bad rss-counter state mm:00000000286f0c14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46604' (ECDSA) to the list of known hosts. 2023/06/20 15:29:35 fuzzer started 2023/06/20 15:29:35 dialing manager at localhost:36067 2023/06/20 15:29:35 checking machine... 2023/06/20 15:29:35 checking revisions... [ 27.088669] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:29:36 testing simple program... [ 27.137357] cgroup: Unknown subsys name 'net' [ 27.191530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b08 RCX=ffffffff860d8201 RDX=1ffff1100d9c137d RSI=ffffffff81846194 RDI=ffff88806ce09b14 RBP=ffff88806ce09be8 RSP=ffff88806ce09a20 R8 =ffffffff860d825a R9 =ffff88806ce09a80 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09b08 R13=0000000000000000 R14=ffff8880168c51c0 R15=ffff888015803e00 RIP=ffffffff813ad547 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 00007f269225a900 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=00007f269280f650 CR3=000000000edfe000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffe9522c578 CR3=000000000d6ee000 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=2035333a39323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a39323a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000