[ 30.301952] BUG: Bad rss-counter state mm:000000000deb9c62 type:MM_FILEPAGES val:33 [ 30.302653] BUG: Bad rss-counter state mm:000000000deb9c62 type:MM_ANONPAGES val:22 [ 30.344906] ================================================================== [ 30.345519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.346104] Read of size 8 at addr ffff8880163f1968 by task sshd/219 [ 30.346759] [ 30.346896] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.358466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.359097] Call Trace: [ 30.359296] [ 30.359475] dump_stack_lvl+0x91/0xf0 [ 30.359784] print_report+0xcc/0x620 [ 30.360086] ? __virt_addr_valid+0x102/0x340 [ 30.360428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361242] kasan_report+0xbe/0xf0 [ 30.361541] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361949] vma_interval_tree_remove+0xc75/0xec0 [ 30.362336] vma_prepare+0xc54/0x11a0 [ 30.374579] __split_vma+0x5af/0x950 [ 30.374887] ? __pfx___split_vma+0x10/0x10 [ 30.375219] ? find_held_lock+0x2c/0x110 [ 30.375546] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.375902] ? lock_is_held_type+0x9f/0x120 [ 30.376238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.376614] ? mtree_range_walk+0x632/0x900 [ 30.376970] ? mas_walk+0x5c7/0x7c0 [ 30.377271] do_vmi_munmap+0x1f1/0x2b0 [ 30.377580] mmap_region+0x1f9/0x2660 [ 30.377888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.378208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.402367] ? __pfx_lock_acquire+0x10/0x10 [ 30.402721] ? __pfx_mmap_region+0x10/0x10 [ 30.403064] ? security_mmap_addr+0x7d/0xa0 [ 30.403396] ? get_unmapped_area+0x1f5/0x3f0 [ 30.403739] do_mmap+0x854/0xf00 [ 30.404018] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.404331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.404685] ksys_mmap_pgoff+0x3af/0x500 [ 30.405003] do_syscall_64+0x3f/0x90 [ 30.405307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.405716] RIP: 0033:0x7f6113d35d82 [ 30.406004] 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 [ 30.407348] RSP: 002b:00007fff6af2c598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.407916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6113d35d82 [ 30.408443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f611316f000 [ 30.408967] RBP: 00007f611316f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.409493] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fec37ebf70 [ 30.410017] R13: 00007fff6af2c5b0 R14: 00007fff6af2c5e0 R15: 00007fff6af2c940 [ 30.410605] [ 30.410788] [ 30.410923] Allocated by task 212: [ 30.411192] kasan_save_stack+0x22/0x50 [ 30.411510] kasan_set_track+0x25/0x30 [ 30.411821] __kasan_slab_alloc+0x59/0x70 [ 30.412148] kmem_cache_alloc+0x16b/0x370 [ 30.412469] vm_area_dup+0x20/0x160 [ 30.412751] __split_vma+0x170/0x950 [ 30.413049] split_vma+0xc6/0x110 [ 30.413322] mprotect_fixup+0x8d2/0xb30 [ 30.413637] do_mprotect_pkey+0x87e/0xd40 [ 30.413961] __x64_sys_mprotect+0x78/0xc0 [ 30.414286] do_syscall_64+0x3f/0x90 [ 30.414598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.414999] [ 30.415135] Freed by task 212: [ 30.415378] kasan_save_stack+0x22/0x50 [ 30.415694] kasan_set_track+0x25/0x30 [ 30.416002] kasan_save_free_info+0x2b/0x50 [ 30.416334] __kasan_slab_free+0x10a/0x190 [ 30.416667] kmem_cache_free+0x10d/0x4d0 [ 30.416985] rcu_core+0x8c8/0x2860 [ 30.417261] __do_softirq+0x1b7/0x7d4 [ 30.417559] [ 30.417693] Last potentially related work creation: [ 30.418060] kasan_save_stack+0x22/0x50 [ 30.418423] __kasan_record_aux_stack+0x8e/0xa0 [ 30.418798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.419209] remove_vma+0x139/0x170 [ 30.419504] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.419861] do_vmi_munmap+0x1f1/0x2b0 [ 30.420175] __vm_munmap+0x138/0x3a0 [ 30.420480] __x64_sys_munmap+0x59/0x80 [ 30.420801] do_syscall_64+0x3f/0x90 [ 30.421107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.421515] [ 30.421655] The buggy address belongs to the object at ffff8880163f1910 [ 30.421655] which belongs to the cache vm_area_struct of size 168 [ 30.422641] The buggy address is located 88 bytes inside of [ 30.422641] freed 168-byte region [ffff8880163f1910, ffff8880163f19b8) [ 30.423511] [ 30.423647] The buggy address belongs to the physical page: [ 30.424057] page:00000000725426e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163f1 [ 30.424735] memcg:ffff88800fd8e201 [ 30.425001] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.425401] page_type: 0xffffffff() [ 30.425683] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.426251] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd8e201 [ 30.426885] page dumped because: kasan: bad access detected [ 30.427300] [ 30.427435] Memory state around the buggy address: [ 30.427795] ffff8880163f1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.428324] ffff8880163f1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.428854] >ffff8880163f1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.429379] ^ [ 30.429866] ffff8880163f1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.430413] ffff8880163f1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.430943] ================================================================== [ 30.431639] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.274453] BUG: Bad rss-counter state mm:000000002b9555f1 type:MM_FILEPAGES val:33 [ 33.275073] BUG: Bad rss-counter state mm:000000002b9555f1 type:MM_ANONPAGES val:22 [ 33.962931] BUG: Bad rss-counter state mm:00000000af0b4d32 type:MM_FILEPAGES val:33 [ 33.963581] BUG: Bad rss-counter state mm:00000000af0b4d32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65310' (ECDSA) to the list of known hosts. 2023/06/21 09:56:49 fuzzer started 2023/06/21 09:56:50 dialing manager at localhost:36067 2023/06/21 09:56:50 checking machine... 2023/06/21 09:56:50 checking revisions... [ 34.781029] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:56:50 testing simple program... [ 34.828767] cgroup: Unknown subsys name 'net' [ 34.904096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f6d36eb1680 CR3=000000000ca56000 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=bf6cc80df7fb2aa32645b733d24a8f11 XMM02=000000000011d630ec2efd57dc4c00df XMM03=00000000001212d8ad844f74a3cc7d05 XMM04=ca2b4530ac9b492400000000000ae988 XMM05=dfcdbad4f1609c3700000000001311c8 XMM06=806171799158d9670000000000131050 XMM07=e042d86d42eb936e00000000001215b0 XMM08=ad844f74a3cc7d05000000000011d690 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff88800fc88000 RSI=ffffffff81164c73 RDI=ffff8880143e8000 RBP=ffff8880143e8000 RSP=ffff88806cf09e18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880143e9548 R13=ffff8880143e8028 R14=ffff88806cf35000 R15=ffff8880143e94d8 RIP=ffffffff812df9d4 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 00007fcd9bad7900 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=00007f43dffc2328 CR3=000000001a5f6000 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=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