[ 54.882213] BUG: Bad rss-counter state mm:000000007bb9f690 type:MM_FILEPAGES val:33 [ 54.883262] BUG: Bad rss-counter state mm:000000007bb9f690 type:MM_ANONPAGES val:22 [ 55.049172] ================================================================== [ 55.050099] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.051041] Read of size 8 at addr ffff88800e3add08 by task sshd/219 [ 55.051939] [ 55.052162] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.053039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.054000] Call Trace: [ 55.054326] [ 55.054614] dump_stack_lvl+0x91/0xf0 [ 55.055108] print_report+0xcc/0x620 [ 55.055593] ? __virt_addr_valid+0x102/0x340 [ 55.056140] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.056761] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.057379] kasan_report+0xbe/0xf0 [ 55.057856] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.058489] vma_interval_tree_remove+0xc75/0xec0 [ 55.059116] vma_prepare+0xc54/0x11a0 [ 55.059605] __split_vma+0x5af/0x950 [ 55.060084] ? __pfx___split_vma+0x10/0x10 [ 55.060615] ? find_held_lock+0x2c/0x110 [ 55.061145] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.061718] ? lock_is_held_type+0x9f/0x120 [ 55.062263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.062875] ? mtree_range_walk+0x632/0x900 [ 55.063449] ? mas_walk+0x5c7/0x7c0 [ 55.063929] do_vmi_munmap+0x1f1/0x2b0 [ 55.064425] mmap_region+0x1f9/0x2660 [ 55.064918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.065440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.066165] ? __pfx_lock_acquire+0x10/0x10 [ 55.066709] ? __pfx_mmap_region+0x10/0x10 [ 55.067259] ? security_mmap_addr+0x7d/0xa0 [ 55.067790] ? get_unmapped_area+0x1f5/0x3f0 [ 55.068344] do_mmap+0x854/0xf00 [ 55.068784] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.069287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.069850] ksys_mmap_pgoff+0x3af/0x500 [ 55.070356] do_syscall_64+0x3f/0x90 [ 55.070835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.071496] RIP: 0033:0x7fa769c89d82 [ 55.071952] 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 [ 55.073952] RSP: 002b:00007ffd6cb16668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.074802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa769c89d82 [ 55.075609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7690c3000 [ 55.076402] RBP: 00007fa7690c3000 R08: 0000000000000009 R09: 0000000000001000 [ 55.077197] R10: 0000000000000812 R11: 0000000000000206 R12: 000056043e949ec0 [ 55.077990] R13: 00007ffd6cb16680 R14: 00007ffd6cb166b0 R15: 00007ffd6cb16a10 [ 55.078790] [ 55.079093] [ 55.079297] Allocated by task 212: [ 55.079705] kasan_save_stack+0x22/0x50 [ 55.080179] kasan_set_track+0x25/0x30 [ 55.080671] __kasan_slab_alloc+0x59/0x70 [ 55.081196] kmem_cache_alloc+0x16b/0x370 [ 55.081708] vm_area_dup+0x20/0x160 [ 55.082156] __split_vma+0x170/0x950 [ 55.082617] split_vma+0xc6/0x110 [ 55.083062] mprotect_fixup+0x8d2/0xb30 [ 55.083567] do_mprotect_pkey+0x87e/0xd40 [ 55.084077] __x64_sys_mprotect+0x78/0xc0 [ 55.084598] do_syscall_64+0x3f/0x90 [ 55.085081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.085715] [ 55.085933] Freed by task 203: [ 55.086320] kasan_save_stack+0x22/0x50 [ 55.086824] kasan_set_track+0x25/0x30 [ 55.087328] kasan_save_free_info+0x2b/0x50 [ 55.087870] __kasan_slab_free+0x10a/0x190 [ 55.088386] kmem_cache_free+0x10d/0x4d0 [ 55.088893] rcu_core+0x8c8/0x2860 [ 55.089338] __do_softirq+0x1b7/0x7d4 [ 55.089818] [ 55.090038] Last potentially related work creation: [ 55.090621] kasan_save_stack+0x22/0x50 [ 55.091137] __kasan_record_aux_stack+0x8e/0xa0 [ 55.091720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.092359] remove_vma+0x139/0x170 [ 55.092818] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.093474] do_vmi_munmap+0x1f1/0x2b0 [ 55.093959] __vm_munmap+0x138/0x3a0 [ 55.094423] __x64_sys_munmap+0x59/0x80 [ 55.094922] do_syscall_64+0x3f/0x90 [ 55.095423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.096053] [ 55.096265] Second to last potentially related work creation: [ 55.096950] kasan_save_stack+0x22/0x50 [ 55.097461] __kasan_record_aux_stack+0x8e/0xa0 [ 55.098034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.098674] remove_vma+0x139/0x170 [ 55.099127] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.099681] do_vmi_munmap+0x1f1/0x2b0 [ 55.100164] mmap_region+0x1f9/0x2660 [ 55.100632] do_mmap+0x854/0xf00 [ 55.101054] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.101540] ksys_mmap_pgoff+0x7d/0x500 [ 55.102026] do_syscall_64+0x3f/0x90 [ 55.102496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.103134] [ 55.103344] The buggy address belongs to the object at ffff88800e3adcb0 [ 55.103344] which belongs to the cache vm_area_struct of size 168 [ 55.104807] The buggy address is located 88 bytes inside of [ 55.104807] freed 168-byte region [ffff88800e3adcb0, ffff88800e3add58) [ 55.106222] [ 55.106441] The buggy address belongs to the physical page: [ 55.107116] page:00000000832e79c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ad [ 55.108187] memcg:ffff88800e0de801 [ 55.108617] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 55.109342] page_type: 0xffffffff() [ 55.109871] raw: 0100000000000200 ffff88800879fc80 ffffea000038e300 dead000000000003 [ 55.110981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0de801 [ 55.111943] page dumped because: kasan: bad access detected [ 55.112606] [ 55.112819] Memory state around the buggy address: [ 55.113393] ffff88800e3adc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 55.114244] ffff88800e3adc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 55.115117] >ffff88800e3add00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 55.115956] ^ [ 55.116390] ffff88800e3add80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 55.117232] ffff88800e3ade00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 55.118079] ================================================================== [ 55.119116] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.139055] BUG: Bad rss-counter state mm:0000000046be3e45 type:MM_FILEPAGES val:33 [ 57.140079] BUG: Bad rss-counter state mm:0000000046be3e45 type:MM_ANONPAGES val:22 [ 57.705009] BUG: Bad rss-counter state mm:00000000e256f14b type:MM_FILEPAGES val:33 [ 57.706193] BUG: Bad rss-counter state mm:00000000e256f14b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4765' (ECDSA) to the list of known hosts. 2023/06/20 03:13:06 fuzzer started 2023/06/20 03:13:06 dialing manager at localhost:44161 2023/06/20 03:13:06 checking machine... 2023/06/20 03:13:06 checking revisions... [ 58.381899] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:13:06 testing simple program... [ 58.417899] cgroup: Unknown subsys name 'net' [ 58.454703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:12:35 Registers: info registers vcpu 0 RAX=ffffffff810001ce RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff810001ce RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d24f080 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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=00007ffe2832aff8 CR3=000000000c49c000 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=2036303a33313a3330203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a363639303420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33313a3330203032 XMM08=7465672f6d65747379732f646d657473 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10028f6f86 RBX=0000000000000038 RCX=ffffffff8217c554 RDX=ffffed10028f6f86 RSI=0000000000000038 RDI=ffff8880147b7bf8 RBP=ffffed10028f6f7f RSP=ffff8880147b7b90 R8 =0000000000000001 R9 =ffffed10028f6f85 R10=ffff8880147b7c2f R11=0000000000000000 R12=00007ffd06365650 R13=ffff8880147b7bf8 R14=0000000000000000 R15=ffff8880147b7cd8 RIP=ffffffff8180efaf 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 00007ffa642da900 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=00007ffa6374ed80 CR3=000000000c9f0000 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=815b0e543b4afdb45e42c2483c2ea5f9 XMM02=000000000011d148eff9b2d0a8fce9cb XMM03=000000000011d2182c67c8bc2e329bc3 XMM04=f88af92ef1c2e96b00000000000ae988 XMM05=169fa0004a2c8d060000000000135f80 XMM06=dfcdbad4f1609c3700000000001347d8 XMM07=fb795ef6d65770560000000000123c38 XMM08=2c67c8bc2e329bc3000000000011d1b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000