[ 158.300956] BUG: Bad rss-counter state mm:00000000144c0564 type:MM_FILEPAGES val:33 [ 158.302190] BUG: Bad rss-counter state mm:00000000144c0564 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 158.350004] ================================================================== [ 158.351000] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 158.351928] Read of size 8 at addr ffff88801a0f53f8 by task sshd/228 [ 158.352710] [ 158.352924] CPU: 0 PID: 228 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 158.353948] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 158.354922] Call Trace: [ 158.355237] [ 158.355520] dump_stack_lvl+0x91/0xf0 [ 158.356000] print_report+0xcc/0x620 [ 158.356477] ? __virt_addr_valid+0x102/0x340 [ 158.357031] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.357646] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.358281] kasan_report+0xbe/0xf0 [ 158.358753] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.359373] vma_interval_tree_remove+0xc75/0xec0 [ 158.359971] vma_prepare+0xc54/0x11a0 [ 158.360452] __split_vma+0x5af/0x950 [ 158.360924] ? __pfx___split_vma+0x10/0x10 [ 158.361449] ? find_held_lock+0x2c/0x110 [ 158.361964] do_vmi_align_munmap+0x2ba/0x11f0 [ 158.362557] ? lock_is_held_type+0x9f/0x120 [ 158.363090] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 158.363691] ? mtree_range_walk+0x632/0x900 [ 158.364244] ? mas_walk+0x5c7/0x7c0 [ 158.364719] do_vmi_munmap+0x1f1/0x2b0 [ 158.365208] mmap_region+0x1f9/0x2660 [ 158.365684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 158.366191] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 158.366899] ? __pfx_lock_acquire+0x10/0x10 [ 158.367425] ? __pfx_mmap_region+0x10/0x10 [ 158.367947] ? security_mmap_addr+0x7d/0xa0 [ 158.368477] ? get_unmapped_area+0x1f5/0x3f0 [ 158.369025] do_mmap+0x854/0xf00 [ 158.369461] vm_mmap_pgoff+0x1a6/0x3a0 [ 158.369951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 158.370523] ksys_mmap_pgoff+0x3af/0x500 [ 158.371028] do_syscall_64+0x3f/0x90 [ 158.371504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.372140] RIP: 0033:0x7f3016f96d82 [ 158.372595] 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 [ 158.374761] RSP: 002b:00007ffdf8289a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 158.375677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3016f96d82 [ 158.376560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30163d0000 [ 158.377435] RBP: 00007f30163d0000 R08: 0000000000000009 R09: 0000000000001000 [ 158.378296] R10: 0000000000000812 R11: 0000000000000206 R12: 000055751f0a5980 [ 158.379145] R13: 00007ffdf8289a30 R14: 00007ffdf8289a60 R15: 00007ffdf8289dc0 [ 158.380033] [ 158.380334] [ 158.380545] Allocated by task 221: [ 158.380969] kasan_save_stack+0x22/0x50 [ 158.381484] kasan_set_track+0x25/0x30 [ 158.381982] __kasan_slab_alloc+0x59/0x70 [ 158.382532] kmem_cache_alloc+0x16b/0x370 [ 158.383064] vm_area_dup+0x20/0x160 [ 158.383523] __split_vma+0x170/0x950 [ 158.383987] split_vma+0xc6/0x110 [ 158.384443] mprotect_fixup+0x8d2/0xb30 [ 158.384952] do_mprotect_pkey+0x87e/0xd40 [ 158.385485] __x64_sys_mprotect+0x78/0xc0 [ 158.386017] do_syscall_64+0x3f/0x90 [ 158.386497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.387156] [ 158.387379] Freed by task 221: [ 158.387779] kasan_save_stack+0x22/0x50 [ 158.388285] kasan_set_track+0x25/0x30 [ 158.388786] kasan_save_free_info+0x2b/0x50 [ 158.389332] __kasan_slab_free+0x10a/0x190 [ 158.389877] kmem_cache_free+0x10d/0x4d0 [ 158.390400] rcu_core+0x8c8/0x2860 [ 158.390860] __do_softirq+0x1b7/0x7d4 [ 158.391351] [ 158.391569] Last potentially related work creation: [ 158.392169] kasan_save_stack+0x22/0x50 [ 158.392684] __kasan_record_aux_stack+0x8e/0xa0 [ 158.393266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 158.393916] remove_vma+0x139/0x170 [ 158.394381] do_vmi_align_munmap+0xd4a/0x11f0 [ 158.394963] do_vmi_munmap+0x1f1/0x2b0 [ 158.395461] __vm_munmap+0x138/0x3a0 [ 158.395944] __x64_sys_munmap+0x59/0x80 [ 158.396455] do_syscall_64+0x3f/0x90 [ 158.396933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.397593] [ 158.397815] The buggy address belongs to the object at ffff88801a0f53a0 [ 158.397815] which belongs to the cache vm_area_struct of size 168 [ 158.399331] The buggy address is located 88 bytes inside of [ 158.399331] freed 168-byte region [ffff88801a0f53a0, ffff88801a0f5448) [ 158.400761] [ 158.400982] The buggy address belongs to the physical page: [ 158.401646] page:00000000971b6a09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0f5 [ 158.402760] memcg:ffff8880100a0e01 [ 158.403196] flags: 0x100000000000200(slab|node=0|zone=1) [ 158.403862] page_type: 0xffffffff() [ 158.404329] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 158.405275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100a0e01 [ 158.406213] page dumped because: kasan: bad access detected [ 158.406871] [ 158.407088] Memory state around the buggy address: [ 158.407667] ffff88801a0f5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 158.408529] ffff88801a0f5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 158.409404] >ffff88801a0f5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 158.410277] ^ [ 158.411134] ffff88801a0f5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 158.412010] ffff88801a0f5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 158.412889] ================================================================== [ 158.413875] Disabling lock debugging due to kernel taint [ 160.785404] BUG: Bad rss-counter state mm:0000000071f75b5c type:MM_FILEPAGES val:33 [ 160.786597] BUG: Bad rss-counter state mm:0000000071f75b5c type:MM_ANONPAGES val:22 [ 161.134993] BUG: Bad rss-counter state mm:00000000c9057a46 type:MM_FILEPAGES val:33 [ 161.136002] BUG: Bad rss-counter state mm:00000000c9057a46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23562' (ECDSA) to the list of known hosts. 2023/06/20 04:28:59 fuzzer started 2023/06/20 04:29:00 dialing manager at localhost:44161 2023/06/20 04:29:00 checking machine... 2023/06/20 04:29:00 checking revisions... [ 161.894290] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:29:00 testing simple program... [ 161.946381] cgroup: Unknown subsys name 'net' [ 161.981770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:27:22 Registers: info registers vcpu 0 RAX=ffffffff849f3f54 RBX=00000000923cb907 RCX=0000000000000007 RDX=ffff8880102e3680 RSI=0000000000000000 RDI=0000000000000000 RBP=000000001215553c RSP=ffff8880147c7540 R8 =0000000000000006 R9 =000000001c08b7d6 R10=000000000e850f3d R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=0000000000000004 R15=ffff88800d4d41a8 RIP=ffffffff8219deaa 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 00007f87fa7ea900 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=00007f87f9c18aa0 CR3=000000000c4e4000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=01d3b6ef202a506500000000000ae988 XMM05=82741d3065e429600000000000140678 XMM06=94aac670ef06ff65000000000013f3a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ff08000 RCX=0000000000000000 RDX=ffff8880102e1b40 RSI=ffffffff83653b29 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801457fb50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800ff08000 R13=ffff88800c6c33c0 R14=ffff88801457fc48 R15=0000000000000053 RIP=ffffffff83653b29 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 00007ffa5c447900 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=00007ffa5c9fc650 CR3=000000001bbc8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000