[ 41.344579] BUG: Bad rss-counter state mm:000000002b08cd58 type:MM_FILEPAGES val:33 [ 41.346096] BUG: Bad rss-counter state mm:000000002b08cd58 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.520428] ================================================================== [ 41.521414] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.522429] Read of size 8 at addr ffff88800d693140 by task sshd/220 [ 41.523386] [ 41.523619] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.524542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.525586] Call Trace: [ 41.525929] [ 41.526233] dump_stack_lvl+0x91/0xf0 [ 41.526766] print_report+0xcc/0x620 [ 41.527298] ? __virt_addr_valid+0x102/0x340 [ 41.527888] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.528552] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.529213] kasan_report+0xbe/0xf0 [ 41.529724] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.530390] vma_interval_tree_remove+0xc75/0xec0 [ 41.531039] vma_prepare+0xc54/0x11a0 [ 41.531548] __split_vma+0x5af/0x950 [ 41.532056] ? __pfx___split_vma+0x10/0x10 [ 41.532626] ? find_held_lock+0x2c/0x110 [ 41.533194] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.533807] ? lock_is_held_type+0x9f/0x120 [ 41.534390] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.535064] ? mtree_range_walk+0x632/0x900 [ 41.535656] ? mas_walk+0x5c7/0x7c0 [ 41.536172] do_vmi_munmap+0x1f1/0x2b0 [ 41.536706] mmap_region+0x1f9/0x2660 [ 41.537228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.537785] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.538560] ? __pfx_lock_acquire+0x10/0x10 [ 41.539150] ? __pfx_mmap_region+0x10/0x10 [ 41.539735] ? security_mmap_addr+0x7d/0xa0 [ 41.540312] ? get_unmapped_area+0x1f5/0x3f0 [ 41.540900] do_mmap+0x854/0xf00 [ 41.541374] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.541908] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.542523] ksys_mmap_pgoff+0x3af/0x500 [ 41.543086] do_syscall_64+0x3f/0x90 [ 41.543603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.544286] RIP: 0033:0x7f96d27eed82 [ 41.544768] 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 [ 41.547058] RSP: 002b:00007ffdc17fac48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.548019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96d27eed82 [ 41.548930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96d1c28000 [ 41.549832] RBP: 00007f96d1c28000 R08: 0000000000000009 R09: 0000000000001000 [ 41.550744] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568514b3ec0 [ 41.551643] R13: 00007ffdc17fac60 R14: 00007ffdc17fac90 R15: 00007ffdc17faff0 [ 41.552557] [ 41.552869] [ 41.553102] Allocated by task 213: [ 41.553552] kasan_save_stack+0x22/0x50 [ 41.554093] kasan_set_track+0x25/0x30 [ 41.554641] __kasan_slab_alloc+0x59/0x70 [ 41.555201] kmem_cache_alloc+0x16b/0x370 [ 41.555749] vm_area_dup+0x20/0x160 [ 41.556228] __split_vma+0x170/0x950 [ 41.556720] split_vma+0xc6/0x110 [ 41.557182] mprotect_fixup+0x8d2/0xb30 [ 41.557708] do_mprotect_pkey+0x87e/0xd40 [ 41.558260] __x64_sys_mprotect+0x78/0xc0 [ 41.558819] do_syscall_64+0x3f/0x90 [ 41.559327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.560002] [ 41.560230] Freed by task 213: [ 41.560641] kasan_save_stack+0x22/0x50 [ 41.561176] kasan_set_track+0x25/0x30 [ 41.561693] kasan_save_free_info+0x2b/0x50 [ 41.562254] __kasan_slab_free+0x10a/0x190 [ 41.562833] kmem_cache_free+0x10d/0x4d0 [ 41.563370] rcu_core+0x8c8/0x2860 [ 41.563837] __do_softirq+0x1b7/0x7d4 [ 41.564339] [ 41.564569] Last potentially related work creation: [ 41.565190] kasan_save_stack+0x22/0x50 [ 41.565732] __kasan_record_aux_stack+0x8e/0xa0 [ 41.566329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.567013] remove_vma+0x139/0x170 [ 41.567486] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.568067] do_vmi_munmap+0x1f1/0x2b0 [ 41.568571] __vm_munmap+0x138/0x3a0 [ 41.569059] __x64_sys_munmap+0x59/0x80 [ 41.569574] do_syscall_64+0x3f/0x90 [ 41.570069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.570752] [ 41.570974] The buggy address belongs to the object at ffff88800d6930e8 [ 41.570974] which belongs to the cache vm_area_struct of size 168 [ 41.572505] The buggy address is located 88 bytes inside of [ 41.572505] freed 168-byte region [ffff88800d6930e8, ffff88800d693190) [ 41.573991] [ 41.574217] The buggy address belongs to the physical page: [ 41.574924] page:000000009fdd52fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd693 [ 41.576071] memcg:ffff88800dcaf801 [ 41.576522] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.577262] page_type: 0xffffffff() [ 41.577741] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 41.578743] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcaf801 [ 41.579704] page dumped because: kasan: bad access detected [ 41.580397] [ 41.580616] Memory state around the buggy address: [ 41.581213] ffff88800d693000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.582082] ffff88800d693080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 41.582968] >ffff88800d693100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.583825] ^ [ 41.584464] ffff88800d693180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 41.585324] ffff88800d693200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 41.586187] ================================================================== [ 41.587243] Disabling lock debugging due to kernel taint [ 43.526006] BUG: Bad rss-counter state mm:00000000a0b6c1a8 type:MM_FILEPAGES val:33 [ 43.527782] BUG: Bad rss-counter state mm:00000000a0b6c1a8 type:MM_ANONPAGES val:22 [ 44.009138] BUG: Bad rss-counter state mm:00000000521f107a type:MM_FILEPAGES val:33 [ 44.010452] BUG: Bad rss-counter state mm:00000000521f107a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30272' (ECDSA) to the list of known hosts. 2023/06/19 16:44:53 fuzzer started 2023/06/19 16:44:53 dialing manager at localhost:44161 2023/06/19 16:44:53 checking machine... 2023/06/19 16:44:53 checking revisions... [ 44.807496] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:44:53 testing simple program... [ 44.855393] cgroup: Unknown subsys name 'net' [ 44.915401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:44:41 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff810ac4e5 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800db53680 RBP=ffff88800db53680 RSP=ffff888019e1fec8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffff88800db53687 R11=00000000000b6996 R12=ffff888019e1ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180eef9 RFL=00000016 [----AP-] 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 00007f12ca8ce900 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=00007f12cae85618 CR3=000000000e798000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007fb5c93e2000 CR3=00000000094ec000 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=1a347a9d5144309a5348c2c756e5ffd0 XMM02=000000000011d960ec2efd57dc4c00df XMM03=0000000000124e909f075a8c6bd83399 XMM04=45d7f2050bde465e00000000000ae988 XMM05=19e9129bd510f2350000000000134a30 XMM06=d9ce05809b5386a10000000000133898 XMM07=e042d86d42eb936e0000000000125110 XMM08=9f075a8c6bd83399000000000011d9c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000