[ 32.030507] BUG: Bad rss-counter state mm:00000000eb114ae5 type:MM_FILEPAGES val:33 [ 32.031534] BUG: Bad rss-counter state mm:00000000eb114ae5 type:MM_ANONPAGES val:22 [ 32.195759] ================================================================== [ 32.196700] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.197659] Read of size 8 at addr ffff88800e191798 by task sshd/219 [ 32.198572] [ 32.198798] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.199688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.200683] Call Trace: [ 32.201007] [ 32.201290] dump_stack_lvl+0x91/0xf0 [ 32.201791] print_report+0xcc/0x620 [ 32.202303] ? __virt_addr_valid+0x102/0x340 [ 32.202850] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.203483] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.204112] kasan_report+0xbe/0xf0 [ 32.204595] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.205245] vma_interval_tree_remove+0xc75/0xec0 [ 32.205885] vma_prepare+0xc54/0x11a0 [ 32.206387] __split_vma+0x5af/0x950 [ 32.206883] ? __pfx___split_vma+0x10/0x10 [ 32.207464] ? find_held_lock+0x2c/0x110 [ 32.208016] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.208615] ? lock_is_held_type+0x9f/0x120 [ 32.209186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.209837] ? mtree_range_walk+0x632/0x900 [ 32.210418] ? mas_walk+0x5c7/0x7c0 [ 32.210918] do_vmi_munmap+0x1f1/0x2b0 [ 32.211452] mmap_region+0x1f9/0x2660 [ 32.211955] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.212499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.213272] ? __pfx_lock_acquire+0x10/0x10 [ 32.213836] ? __pfx_mmap_region+0x10/0x10 [ 32.214395] ? security_mmap_addr+0x7d/0xa0 [ 32.214957] ? get_unmapped_area+0x1f5/0x3f0 [ 32.215550] do_mmap+0x854/0xf00 [ 32.216021] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.216544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.217137] ksys_mmap_pgoff+0x3af/0x500 [ 32.217671] do_syscall_64+0x3f/0x90 [ 32.218171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.218860] RIP: 0033:0x7f377ecf5d82 [ 32.219358] 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 [ 32.221627] RSP: 002b:00007ffe2cb49468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.222596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f377ecf5d82 [ 32.223512] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f377e12f000 [ 32.224418] RBP: 00007f377e12f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.225328] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564c889bec0 [ 32.226233] R13: 00007ffe2cb49480 R14: 00007ffe2cb494b0 R15: 00007ffe2cb49810 [ 32.227163] [ 32.227481] [ 32.227703] Allocated by task 211: [ 32.228157] kasan_save_stack+0x22/0x50 [ 32.228695] kasan_set_track+0x25/0x30 [ 32.229222] __kasan_slab_alloc+0x59/0x70 [ 32.229776] kmem_cache_alloc+0x16b/0x370 [ 32.230322] vm_area_dup+0x20/0x160 [ 32.230799] __split_vma+0x170/0x950 [ 32.231325] split_vma+0xc6/0x110 [ 32.231781] mprotect_fixup+0x8d2/0xb30 [ 32.232317] do_mprotect_pkey+0x87e/0xd40 [ 32.232861] __x64_sys_mprotect+0x78/0xc0 [ 32.233403] do_syscall_64+0x3f/0x90 [ 32.233908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.234593] [ 32.234820] Freed by task 203: [ 32.235261] kasan_save_stack+0x22/0x50 [ 32.235789] kasan_set_track+0x25/0x30 [ 32.236315] kasan_save_free_info+0x2b/0x50 [ 32.236881] __kasan_slab_free+0x10a/0x190 [ 32.237443] kmem_cache_free+0x10d/0x4d0 [ 32.237979] rcu_core+0x8c8/0x2860 [ 32.238452] __do_softirq+0x1b7/0x7d4 [ 32.238957] [ 32.239196] Last potentially related work creation: [ 32.239808] kasan_save_stack+0x22/0x50 [ 32.240337] __kasan_record_aux_stack+0x8e/0xa0 [ 32.240945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.241630] remove_vma+0x139/0x170 [ 32.242107] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.242693] do_vmi_munmap+0x1f1/0x2b0 [ 32.243216] __vm_munmap+0x138/0x3a0 [ 32.243710] __x64_sys_munmap+0x59/0x80 [ 32.244227] do_syscall_64+0x3f/0x90 [ 32.244729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.245406] [ 32.245635] Second to last potentially related work creation: [ 32.246359] kasan_save_stack+0x22/0x50 [ 32.246902] __kasan_record_aux_stack+0x8e/0xa0 [ 32.247527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.248208] remove_vma+0x139/0x170 [ 32.248686] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.249281] do_vmi_munmap+0x1f1/0x2b0 [ 32.249787] mmap_region+0x1f9/0x2660 [ 32.250289] do_mmap+0x854/0xf00 [ 32.250741] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.251271] ksys_mmap_pgoff+0x3af/0x500 [ 32.251807] do_syscall_64+0x3f/0x90 [ 32.252311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.252997] [ 32.253226] The buggy address belongs to the object at ffff88800e191740 [ 32.253226] which belongs to the cache vm_area_struct of size 168 [ 32.254790] The buggy address is located 88 bytes inside of [ 32.254790] freed 168-byte region [ffff88800e191740, ffff88800e1917e8) [ 32.256306] [ 32.256534] The buggy address belongs to the physical page: [ 32.257236] page:00000000594a9854 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe191 [ 32.258402] memcg:ffff88800ddf6401 [ 32.258860] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.259563] page_type: 0xffffffff() [ 32.260035] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.261003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddf6401 [ 32.261979] page dumped because: kasan: bad access detected [ 32.262684] [ 32.262907] Memory state around the buggy address: [ 32.263535] ffff88800e191680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.264432] ffff88800e191700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.265329] >ffff88800e191780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.266228] ^ [ 32.266750] ffff88800e191800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.267676] ffff88800e191880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.268569] ================================================================== [ 32.269662] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.934410] BUG: Bad rss-counter state mm:00000000d973b38e type:MM_FILEPAGES val:33 [ 33.935713] BUG: Bad rss-counter state mm:00000000d973b38e type:MM_ANONPAGES val:22 [ 34.361016] BUG: Bad rss-counter state mm:0000000067d14c86 type:MM_FILEPAGES val:33 [ 34.362317] BUG: Bad rss-counter state mm:0000000067d14c86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34574' (ECDSA) to the list of known hosts. 2023/06/20 07:09:24 fuzzer started 2023/06/20 07:09:24 dialing manager at localhost:44161 2023/06/20 07:09:24 checking machine... 2023/06/20 07:09:24 checking revisions... [ 34.961006] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:09:24 testing simple program... [ 35.004170] cgroup: Unknown subsys name 'net' [ 35.036646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:09:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=ffff888014790000 RSI=ffffffff814c83e7 RDI=ffffffff856528e0 RBP=00007f0fb27f019d RSP=ffff88801478f270 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f0fb27f019d R13=0000000000000000 R14=ffff888014790000 R15=0000000000092820 RIP=ffffffff8135bcf0 RFL=00000293 [--S-A-C] 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 00007f0fb1f26900 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=00007f0fb1383200 CR3=000000000ea70000 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=6a2eec0ea33ff783c44b9bc68446565b XMM02=ec2efd57dc4c00df0000000000120508 XMM03=7eafac4288b12e8100000000001205d8 XMM04=8308b3772e49ac8c00000000000ae988 XMM05=7ca6052f390bf6c80000000000137998 XMM06=dfcdbad4f1609c3700000000001364e0 XMM07=fb795ef6d657705600000000001258d0 XMM08=2c67c8bc2e329bc30000000000120578 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a5883f RBX=ffff8880000003d0 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffff8880167713d0 RDI=0000000000000000 RBP=0000000000000043 RSP=ffff88800ecffcf8 R8 =0000000000000007 R9 =0000000000000043 R10=0000000000000043 R11=0000000000000000 R12=0000000016771067 R13=ffff8880167713d0 R14=ffff88800ecffdf0 R15=0000000000000000 RIP=ffffffff814c03b0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1879bb8900 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=00007fff2747a000 CR3=0000000018eda000 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=e01e4bf77faac73d2e1cb76b8102f597 XMM03=aba8111b6df89c9926936bcca969eedb XMM04=3e7a7e99e9f5b9c9410dfd11159acf75 XMM05=00000000000000000000000000000000 XMM06=3e7a111b6df59c99260d6b111569cf75 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000