[ 30.671717] BUG: Bad rss-counter state mm:00000000be849377 type:MM_FILEPAGES val:33 [ 30.672456] BUG: Bad rss-counter state mm:00000000be849377 type:MM_ANONPAGES val:22 [ 30.754943] ================================================================== [ 30.756078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.756725] Read of size 8 at addr ffff88800ee813f8 by task sshd/220 [ 30.757214] [ 30.757358] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.767755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.768480] Call Trace: [ 30.768716] [ 30.768928] dump_stack_lvl+0x91/0xf0 [ 30.769260] print_report+0xcc/0x620 [ 30.769606] ? __virt_addr_valid+0x102/0x340 [ 30.769962] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770350] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770794] kasan_report+0xbe/0xf0 [ 30.771102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771500] vma_interval_tree_remove+0xc75/0xec0 [ 30.771912] vma_prepare+0xc54/0x11a0 [ 30.772225] __split_vma+0x5af/0x950 [ 30.772534] ? __pfx___split_vma+0x10/0x10 [ 30.772880] ? find_held_lock+0x2c/0x110 [ 30.773227] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.773627] ? lock_is_held_type+0x9f/0x120 [ 30.773980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.774371] ? mtree_range_walk+0x632/0x900 [ 30.774767] ? mas_walk+0x5c7/0x7c0 [ 30.775076] do_vmi_munmap+0x1f1/0x2b0 [ 30.775395] mmap_region+0x1f9/0x2660 [ 30.775744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.776562] ? __pfx_lock_acquire+0x10/0x10 [ 30.776905] ? __pfx_mmap_region+0x10/0x10 [ 30.777244] ? security_mmap_addr+0x7d/0xa0 [ 30.777610] ? get_unmapped_area+0x1f5/0x3f0 [ 30.777985] do_mmap+0x854/0xf00 [ 30.778271] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.778592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.778952] ksys_mmap_pgoff+0x3af/0x500 [ 30.779279] do_syscall_64+0x3f/0x90 [ 30.779598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780020] RIP: 0033:0x7f63e8b8cd82 [ 30.780315] 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 [ 30.781689] RSP: 002b:00007fff74cecde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.782264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63e8b8cd82 [ 30.782803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63e7fc6000 [ 30.783341] RBP: 00007f63e7fc6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.783928] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647eb340ec0 [ 30.784464] R13: 00007fff74cece00 R14: 00007fff74cece30 R15: 00007fff74ced190 [ 30.785055] [ 30.785606] [ 30.785746] Allocated by task 213: [ 30.786022] kasan_save_stack+0x22/0x50 [ 30.786346] kasan_set_track+0x25/0x30 [ 30.786666] __kasan_slab_alloc+0x59/0x70 [ 30.787001] kmem_cache_alloc+0x16b/0x370 [ 30.787329] vm_area_dup+0x20/0x160 [ 30.787659] __split_vma+0x170/0x950 [ 30.787957] split_vma+0xc6/0x110 [ 30.788231] mprotect_fixup+0x8d2/0xb30 [ 30.788549] do_mprotect_pkey+0x87e/0xd40 [ 30.788912] __x64_sys_mprotect+0x78/0xc0 [ 30.789238] do_syscall_64+0x3f/0x90 [ 30.789535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789938] [ 30.790076] Freed by task 19: [ 30.790319] kasan_save_stack+0x22/0x50 [ 30.790664] kasan_set_track+0x25/0x30 [ 30.790971] kasan_save_free_info+0x2b/0x50 [ 30.791302] __kasan_slab_free+0x10a/0x190 [ 30.791700] kmem_cache_free+0x10d/0x4d0 [ 30.792043] rcu_core+0x8c8/0x2860 [ 30.792332] __do_softirq+0x1b7/0x7d4 [ 30.792645] [ 30.792789] Last potentially related work creation: [ 30.793165] kasan_save_stack+0x22/0x50 [ 30.793497] __kasan_record_aux_stack+0x8e/0xa0 [ 30.793868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.794282] remove_vma+0x139/0x170 [ 30.794606] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794958] do_vmi_munmap+0x1f1/0x2b0 [ 30.795275] __vm_munmap+0x138/0x3a0 [ 30.799614] __x64_sys_munmap+0x59/0x80 [ 30.799943] do_syscall_64+0x3f/0x90 [ 30.800244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800647] [ 30.800787] Second to last potentially related work creation: [ 30.801222] kasan_save_stack+0x22/0x50 [ 30.801554] __kasan_record_aux_stack+0x8e/0xa0 [ 30.801914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.802324] remove_vma+0x139/0x170 [ 30.802618] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.802975] do_vmi_munmap+0x1f1/0x2b0 [ 30.803281] __vm_munmap+0x138/0x3a0 [ 30.803575] __x64_sys_munmap+0x59/0x80 [ 30.803922] do_syscall_64+0x3f/0x90 [ 30.804232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804642] [ 30.804778] The buggy address belongs to the object at ffff88800ee813a0 [ 30.804778] which belongs to the cache vm_area_struct of size 168 [ 30.805697] The buggy address is located 88 bytes inside of [ 30.805697] freed 168-byte region [ffff88800ee813a0, ffff88800ee81448) [ 30.806577] [ 30.806715] The buggy address belongs to the physical page: [ 30.807205] page:00000000701b3d20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee81 [ 30.807917] memcg:ffff88800e7f2401 [ 30.808186] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.808619] page_type: 0xffffffff() [ 30.808908] raw: 0100000000000200 ffff8880087a0c80 ffffea000036a880 dead000000000008 [ 30.809488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7f2401 [ 30.810105] page dumped because: kasan: bad access detected [ 30.810532] [ 30.810673] Memory state around the buggy address: [ 30.811039] ffff88800ee81280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.811620] ffff88800ee81300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.812173] >ffff88800ee81380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.812745] ^ [ 30.813288] ffff88800ee81400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.813830] ffff88800ee81480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.814373] ================================================================== [ 30.815188] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.512019] BUG: Bad rss-counter state mm:0000000097547db8 type:MM_FILEPAGES val:33 [ 35.512636] BUG: Bad rss-counter state mm:0000000097547db8 type:MM_ANONPAGES val:22 [ 36.189256] BUG: Bad rss-counter state mm:0000000064121ba9 type:MM_FILEPAGES val:33 [ 36.189941] BUG: Bad rss-counter state mm:0000000064121ba9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53321' (ECDSA) to the list of known hosts. 2023/06/21 10:01:05 fuzzer started 2023/06/21 10:01:06 dialing manager at localhost:36067 2023/06/21 10:01:06 checking machine... 2023/06/21 10:01:06 checking revisions... [ 37.132917] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:01:06 testing simple program... [ 37.191563] cgroup: Unknown subsys name 'net' [ 37.282679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:05 Registers: info registers vcpu 0 RAX=0000000000010001 RBX=ffff88806ce2c250 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffffffff813bdd00 RDI=0000000000000006 RBP=00000000000f4240 RSP=ffff88806ce09dc0 R8 =0000000000000006 R9 =0000000866f33dea R10=0000000866e4a980 R11=00000018d35bcc18 R12=0000000866e4a980 R13=0000000866e4a980 R14=0000000000000003 R15=0000000866e4a980 RIP=ffffffff814c086b RFL=00000006 [-----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=00007f11add4f328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f9af105b450 CR3=000000000d63c000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=134a0efbf9cfc7ee0000000000134360 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=e7a666482d57134d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000