[ 31.439560] BUG: Bad rss-counter state mm:000000002c1f5b63 type:MM_FILEPAGES val:33 [ 31.440265] BUG: Bad rss-counter state mm:000000002c1f5b63 type:MM_ANONPAGES val:22 [ 31.600595] ================================================================== [ 31.601319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.602056] Read of size 8 at addr ffff888015a99228 by task sshd/219 [ 31.602655] [ 31.602827] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.603493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.604401] Call Trace: [ 31.604652] [ 31.604871] dump_stack_lvl+0x91/0xf0 [ 31.605250] print_report+0xcc/0x620 [ 31.605626] ? __virt_addr_valid+0x102/0x340 [ 31.606069] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.606548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.607020] kasan_report+0xbe/0xf0 [ 31.607387] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.607865] vma_interval_tree_remove+0xc75/0xec0 [ 31.608329] vma_prepare+0xc54/0x11a0 [ 31.608702] __split_vma+0x5af/0x950 [ 31.609064] ? __pfx___split_vma+0x10/0x10 [ 31.609469] ? find_held_lock+0x2c/0x110 [ 31.609884] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.610321] ? lock_is_held_type+0x9f/0x120 [ 31.610740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.611212] ? mtree_range_walk+0x632/0x900 [ 31.611646] ? mas_walk+0x5c7/0x7c0 [ 31.612016] do_vmi_munmap+0x1f1/0x2b0 [ 31.612401] mmap_region+0x1f9/0x2660 [ 31.612779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.613178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.613736] ? __pfx_lock_acquire+0x10/0x10 [ 31.614168] ? __pfx_mmap_region+0x10/0x10 [ 31.614579] ? security_mmap_addr+0x7d/0xa0 [ 31.614993] ? get_unmapped_area+0x1f5/0x3f0 [ 31.615421] do_mmap+0x854/0xf00 [ 31.615763] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.616151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.616591] ksys_mmap_pgoff+0x3af/0x500 [ 31.616985] do_syscall_64+0x3f/0x90 [ 31.617354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.617864] RIP: 0033:0x7fa8eac0fd82 [ 31.618224] 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 [ 31.619876] RSP: 002b:00007ffd123933f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.620580] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8eac0fd82 [ 31.621226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8ea049000 [ 31.621904] RBP: 00007fa8ea049000 R08: 0000000000000009 R09: 0000000000001000 [ 31.622565] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c777439980 [ 31.623227] R13: 00007ffd12393410 R14: 00007ffd12393440 R15: 00007ffd123937a0 [ 31.623896] [ 31.624124] [ 31.624290] Allocated by task 212: [ 31.624626] kasan_save_stack+0x22/0x50 [ 31.625020] kasan_set_track+0x25/0x30 [ 31.625406] __kasan_slab_alloc+0x59/0x70 [ 31.625821] kmem_cache_alloc+0x16b/0x370 [ 31.626220] vm_area_dup+0x20/0x160 [ 31.626577] __split_vma+0x170/0x950 [ 31.626938] split_vma+0xc6/0x110 [ 31.627280] mprotect_fixup+0x8d2/0xb30 [ 31.627670] do_mprotect_pkey+0x87e/0xd40 [ 31.628073] __x64_sys_mprotect+0x78/0xc0 [ 31.628481] do_syscall_64+0x3f/0x90 [ 31.628847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629343] [ 31.629513] Freed by task 212: [ 31.629834] kasan_save_stack+0x22/0x50 [ 31.630219] kasan_set_track+0x25/0x30 [ 31.630609] kasan_save_free_info+0x2b/0x50 [ 31.631026] __kasan_slab_free+0x10a/0x190 [ 31.631437] kmem_cache_free+0x10d/0x4d0 [ 31.631828] rcu_core+0x8c8/0x2860 [ 31.632168] __do_softirq+0x1b7/0x7d4 [ 31.632542] [ 31.632708] Last potentially related work creation: [ 31.633164] kasan_save_stack+0x22/0x50 [ 31.633557] __kasan_record_aux_stack+0x8e/0xa0 [ 31.634010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.634516] remove_vma+0x139/0x170 [ 31.634869] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.635305] do_vmi_munmap+0x1f1/0x2b0 [ 31.635683] __vm_munmap+0x138/0x3a0 [ 31.636050] __x64_sys_munmap+0x59/0x80 [ 31.636439] do_syscall_64+0x3f/0x90 [ 31.636805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.637306] [ 31.637476] The buggy address belongs to the object at ffff888015a991d0 [ 31.637476] which belongs to the cache vm_area_struct of size 168 [ 31.638625] The buggy address is located 88 bytes inside of [ 31.638625] freed 168-byte region [ffff888015a991d0, ffff888015a99278) [ 31.639708] [ 31.639877] The buggy address belongs to the physical page: [ 31.640383] page:00000000c54a00a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a99 [ 31.641234] memcg:ffff88800dee4401 [ 31.641571] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.642131] page_type: 0xffffffff() [ 31.642484] raw: 0100000000000200 ffff88800879fc80 ffffea0000319c80 0000000000000007 [ 31.643195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee4401 [ 31.643896] page dumped because: kasan: bad access detected [ 31.644413] [ 31.644581] Memory state around the buggy address: [ 31.645030] ffff888015a99100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.645798] ffff888015a99180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.646469] >ffff888015a99200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.647127] ^ [ 31.647564] ffff888015a99280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.648232] ffff888015a99300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.648892] ================================================================== [ 31.649592] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.198694] BUG: Bad rss-counter state mm:000000009688890e type:MM_FILEPAGES val:33 [ 34.199694] BUG: Bad rss-counter state mm:000000009688890e type:MM_ANONPAGES val:22 [ 34.687653] BUG: Bad rss-counter state mm:00000000d42efe15 type:MM_FILEPAGES val:33 [ 34.688865] BUG: Bad rss-counter state mm:00000000d42efe15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59778' (ECDSA) to the list of known hosts. 2023/06/19 17:21:33 fuzzer started 2023/06/19 17:21:33 dialing manager at localhost:44161 2023/06/19 17:21:33 checking machine... 2023/06/19 17:21:33 checking revisions... [ 35.524395] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:21:34 testing simple program... [ 35.575837] cgroup: Unknown subsys name 'net' [ 35.624561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:21:25 Registers: info registers vcpu 0 RAX=1ffff110039184ab RBX=ffff88801c8c2528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801c8c2558 RBP=ffff888019037440 RSP=ffff888008d7fcb8 R8 =0000000000000001 R9 =ffffed10011aff8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888019038758 R14=ffffffff813782a8 R15=ffff88800da26c00 RIP=ffffffff81846362 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 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=00007f08ff666f80 CR3=000000000cab0000 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=fe297b28fb81d8b89246d5198a466791 XMM02=000000000011d1e8eff9b2d0a8fce9cb XMM03=000000000011d2b82c67c8bc2e329bc3 XMM04=6f8726e1c58dc65e00000000000ae988 XMM05=528cadee77415f630000000000134580 XMM06=dfcdbad4f1609c3700000000001330a8 XMM07=fb795ef6d65770560000000000123508 XMM08=2c67c8bc2e329bc3000000000011d258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f635e80f0b0 CR3=000000000ee1a000 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=31323a3731203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000