[ 30.522759] BUG: Bad rss-counter state mm:000000000b666862 type:MM_FILEPAGES val:33 [ 30.523489] BUG: Bad rss-counter state mm:000000000b666862 type:MM_ANONPAGES val:22 [ 30.617579] ================================================================== [ 30.618164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.618753] Read of size 8 at addr ffff88800e2ee5c8 by task sshd/219 [ 30.619230] [ 30.619369] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.619937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.620541] Call Trace: [ 30.620742] [ 30.620921] dump_stack_lvl+0x91/0xf0 [ 30.621231] print_report+0xcc/0x620 [ 30.621539] ? __virt_addr_valid+0x102/0x340 [ 30.621886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.622272] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.622659] kasan_report+0xbe/0xf0 [ 30.622959] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.623351] vma_interval_tree_remove+0xc75/0xec0 [ 30.624062] vma_prepare+0xc54/0x11a0 [ 30.624430] __split_vma+0x5af/0x950 [ 30.624730] ? __pfx___split_vma+0x10/0x10 [ 30.625061] ? find_held_lock+0x2c/0x110 [ 30.625445] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.625803] ? lock_is_held_type+0x9f/0x120 [ 30.626164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.626599] ? mtree_range_walk+0x632/0x900 [ 30.626947] ? mas_walk+0x5c7/0x7c0 [ 30.627338] do_vmi_munmap+0x1f1/0x2b0 [ 30.627672] mmap_region+0x1f9/0x2660 [ 30.627978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.628400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.628848] ? __pfx_lock_acquire+0x10/0x10 [ 30.629187] ? __pfx_mmap_region+0x10/0x10 [ 30.629579] ? security_mmap_addr+0x7d/0xa0 [ 30.629915] ? get_unmapped_area+0x1f5/0x3f0 [ 30.630318] do_mmap+0x854/0xf00 [ 30.630598] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.630909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.631315] ksys_mmap_pgoff+0x3af/0x500 [ 30.631697] do_syscall_64+0x3f/0x90 [ 30.631999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.632491] RIP: 0033:0x7fc7da153d82 [ 30.632781] 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 [ 30.634143] RSP: 002b:00007ffee12934a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.634766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7da153d82 [ 30.635350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7d958d000 [ 30.635899] RBP: 00007fc7d958d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.636501] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb160a1ec0 [ 30.637028] R13: 00007ffee12934c0 R14: 00007ffee12934f0 R15: 00007ffee1293850 [ 30.637615] [ 30.637801] [ 30.637936] Allocated by task 212: [ 30.638253] kasan_save_stack+0x22/0x50 [ 30.638584] kasan_set_track+0x25/0x30 [ 30.638893] __kasan_slab_alloc+0x59/0x70 [ 30.639299] kmem_cache_alloc+0x16b/0x370 [ 30.639635] vm_area_dup+0x20/0x160 [ 30.639922] __split_vma+0x170/0x950 [ 30.640336] split_vma+0xc6/0x110 [ 30.640613] mprotect_fixup+0x8d2/0xb30 [ 30.640928] do_mprotect_pkey+0x87e/0xd40 [ 30.641314] __x64_sys_mprotect+0x78/0xc0 [ 30.641642] do_syscall_64+0x3f/0x90 [ 30.641938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642399] [ 30.642536] Freed by task 210: [ 30.642780] kasan_save_stack+0x22/0x50 [ 30.643097] kasan_set_track+0x25/0x30 [ 30.643460] kasan_save_free_info+0x2b/0x50 [ 30.643818] __kasan_slab_free+0x10a/0x190 [ 30.644152] kmem_cache_free+0x10d/0x4d0 [ 30.644547] rcu_core+0x8c8/0x2860 [ 30.644828] __do_softirq+0x1b7/0x7d4 [ 30.645127] [ 30.645317] Last potentially related work creation: [ 30.645682] kasan_save_stack+0x22/0x50 [ 30.645998] __kasan_record_aux_stack+0x8e/0xa0 [ 30.646415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.646821] remove_vma+0x139/0x170 [ 30.647103] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.647504] do_vmi_munmap+0x1f1/0x2b0 [ 30.647833] __vm_munmap+0x138/0x3a0 [ 30.648130] __x64_sys_munmap+0x59/0x80 [ 30.648517] do_syscall_64+0x3f/0x90 [ 30.648815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.649271] [ 30.649411] Second to last potentially related work creation: [ 30.649833] kasan_save_stack+0x22/0x50 [ 30.650149] __kasan_record_aux_stack+0x8e/0xa0 [ 30.650563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.650967] remove_vma+0x139/0x170 [ 30.651305] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.651676] do_vmi_munmap+0x1f1/0x2b0 [ 30.651978] mmap_region+0x1f9/0x2660 [ 30.652400] do_mmap+0x854/0xf00 [ 30.652672] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.652978] ksys_mmap_pgoff+0x3af/0x500 [ 30.653346] do_syscall_64+0x3f/0x90 [ 30.653645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.654044] [ 30.654179] The buggy address belongs to the object at ffff88800e2ee570 [ 30.654179] which belongs to the cache vm_area_struct of size 168 [ 30.655146] The buggy address is located 88 bytes inside of [ 30.655146] freed 168-byte region [ffff88800e2ee570, ffff88800e2ee618) [ 30.656170] [ 30.656386] The buggy address belongs to the physical page: [ 30.656798] page:0000000009897613 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ee [ 30.657525] memcg:ffff88800d9a0801 [ 30.657792] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.658194] page_type: 0xffffffff() [ 30.658541] raw: 0100000000000200 ffff88800879fc80 ffffea0000383cc0 dead000000000002 [ 30.659110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9a0801 [ 30.659751] page dumped because: kasan: bad access detected [ 30.660162] [ 30.660374] Memory state around the buggy address: [ 30.660737] ffff88800e2ee480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.661321] ffff88800e2ee500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.661852] >ffff88800e2ee580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.662461] ^ [ 30.662873] ffff88800e2ee600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.663500] ffff88800e2ee680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.664052] ================================================================== [ 30.688122] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.697506] BUG: Bad rss-counter state mm:0000000012066294 type:MM_FILEPAGES val:33 [ 32.698292] BUG: Bad rss-counter state mm:0000000012066294 type:MM_ANONPAGES val:22 [ 33.736996] BUG: Bad rss-counter state mm:0000000062853f79 type:MM_FILEPAGES val:33 [ 33.737667] BUG: Bad rss-counter state mm:0000000062853f79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5761' (ECDSA) to the list of known hosts. 2023/06/20 08:07:47 fuzzer started 2023/06/20 08:07:48 dialing manager at localhost:44161 2023/06/20 08:07:48 checking machine... 2023/06/20 08:07:48 checking revisions... [ 34.871653] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:07:48 testing simple program... [ 34.925688] cgroup: Unknown subsys name 'net' [ 35.018372] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:07:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002feeef7 RSP=ffff888017f777a8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856cd420 R13=ffffffff81787baa R14=0000000000000000 R15=ffffffff818470dc RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007fe82087d900 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=00007fe82087d6f8 CR3=000000000f7a6000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=000000000000000c RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000d RDI=ffff88800fe6f7e0 RBP=dffffc0000000000 RSP=ffff88800fe6f6f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000d R13=0000000000092cc0 R14=ffff88800fe6f780 R15=0000000000092cc0 RIP=ffffffff813ad601 RFL=00000202 [-------] 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 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=00007fff19536f50 CR3=000000000caca000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000ff000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000