[ 32.773937] BUG: Bad rss-counter state mm:00000000ebc23ecf type:MM_FILEPAGES val:33 [ 32.775571] BUG: Bad rss-counter state mm:00000000ebc23ecf type:MM_ANONPAGES val:22 [ 32.931566] ================================================================== [ 32.932485] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.933435] Read of size 8 at addr ffff88800e51bd08 by task sshd/219 [ 32.934307] [ 32.934574] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.935436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.936445] Call Trace: [ 32.936766] [ 32.937052] dump_stack_lvl+0x91/0xf0 [ 32.937546] print_report+0xcc/0x620 [ 32.938037] ? __virt_addr_valid+0x102/0x340 [ 32.938585] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.939202] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.939834] kasan_report+0xbe/0xf0 [ 32.940311] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.940939] vma_interval_tree_remove+0xc75/0xec0 [ 32.941539] vma_prepare+0xc54/0x11a0 [ 32.942023] __split_vma+0x5af/0x950 [ 32.942498] ? __pfx___split_vma+0x10/0x10 [ 32.943031] ? find_held_lock+0x2c/0x110 [ 32.943559] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.944127] ? lock_is_held_type+0x9f/0x120 [ 32.944664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.945278] ? mtree_range_walk+0x632/0x900 [ 32.945831] ? mas_walk+0x5c7/0x7c0 [ 32.946309] do_vmi_munmap+0x1f1/0x2b0 [ 32.946803] mmap_region+0x1f9/0x2660 [ 32.947286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.947818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.948527] ? __pfx_lock_acquire+0x10/0x10 [ 32.949060] ? __pfx_mmap_region+0x10/0x10 [ 32.949585] ? security_mmap_addr+0x7d/0xa0 [ 32.950114] ? get_unmapped_area+0x1f5/0x3f0 [ 32.950663] do_mmap+0x854/0xf00 [ 32.951112] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.951615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.952184] ksys_mmap_pgoff+0x3af/0x500 [ 32.952689] do_syscall_64+0x3f/0x90 [ 32.953172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.953818] RIP: 0033:0x7f1e22163d82 [ 32.954276] 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 [ 32.956426] RSP: 002b:00007ffc7c5493e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.957333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e22163d82 [ 32.958187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e2159d000 [ 32.959037] RBP: 00007f1e2159d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.959896] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f485e6ec0 [ 32.960746] R13: 00007ffc7c549400 R14: 00007ffc7c549430 R15: 00007ffc7c549790 [ 32.961603] [ 32.961897] [ 32.962113] Allocated by task 212: [ 32.962544] kasan_save_stack+0x22/0x50 [ 32.963048] kasan_set_track+0x25/0x30 [ 32.963547] __kasan_slab_alloc+0x59/0x70 [ 32.964066] kmem_cache_alloc+0x16b/0x370 [ 32.964581] vm_area_dup+0x20/0x160 [ 32.965034] __split_vma+0x170/0x950 [ 32.965503] split_vma+0xc6/0x110 [ 32.965942] mprotect_fixup+0x8d2/0xb30 [ 32.966441] do_mprotect_pkey+0x87e/0xd40 [ 32.966962] __x64_sys_mprotect+0x78/0xc0 [ 32.967481] do_syscall_64+0x3f/0x90 [ 32.967984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.968621] [ 32.968837] Freed by task 203: [ 32.969229] kasan_save_stack+0x22/0x50 [ 32.969732] kasan_set_track+0x25/0x30 [ 32.970259] kasan_save_free_info+0x2b/0x50 [ 32.970799] __kasan_slab_free+0x10a/0x190 [ 32.971335] kmem_cache_free+0x10d/0x4d0 [ 32.971850] rcu_core+0x8c8/0x2860 [ 32.972295] __do_softirq+0x1b7/0x7d4 [ 32.972777] [ 32.972995] Last potentially related work creation: [ 32.973586] kasan_save_stack+0x22/0x50 [ 32.974093] __kasan_record_aux_stack+0x8e/0xa0 [ 32.974671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.975312] remove_vma+0x139/0x170 [ 32.975772] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.976337] do_vmi_munmap+0x1f1/0x2b0 [ 32.976825] __vm_munmap+0x138/0x3a0 [ 32.977294] __x64_sys_munmap+0x59/0x80 [ 32.977790] do_syscall_64+0x3f/0x90 [ 32.978270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.978915] [ 32.979129] Second to last potentially related work creation: [ 32.979834] kasan_save_stack+0x22/0x50 [ 32.980343] __kasan_record_aux_stack+0x8e/0xa0 [ 32.980916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.981556] remove_vma+0x139/0x170 [ 32.982008] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.982564] do_vmi_munmap+0x1f1/0x2b0 [ 32.983058] __vm_munmap+0x138/0x3a0 [ 32.983546] __x64_sys_munmap+0x59/0x80 [ 32.984044] do_syscall_64+0x3f/0x90 [ 32.984517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.985168] [ 32.985386] The buggy address belongs to the object at ffff88800e51bcb0 [ 32.985386] which belongs to the cache vm_area_struct of size 168 [ 32.986860] The buggy address is located 88 bytes inside of [ 32.986860] freed 168-byte region [ffff88800e51bcb0, ffff88800e51bd58) [ 32.988299] [ 32.988515] The buggy address belongs to the physical page: [ 32.989187] page:000000004126a142 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe51b [ 32.990270] memcg:ffff88800e35b101 [ 32.990698] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.991394] page_type: 0xffffffff() [ 32.991850] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.992763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e35b101 [ 32.993674] page dumped because: kasan: bad access detected [ 32.994334] [ 32.994548] Memory state around the buggy address: [ 32.995135] ffff88800e51bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.996005] ffff88800e51bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.996861] >ffff88800e51bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.997717] ^ [ 32.998160] ffff88800e51bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.999024] ffff88800e51be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.999874] ================================================================== [ 33.001148] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.336786] BUG: Bad rss-counter state mm:0000000044891681 type:MM_FILEPAGES val:33 [ 35.337762] BUG: Bad rss-counter state mm:0000000044891681 type:MM_ANONPAGES val:22 [ 35.795906] BUG: Bad rss-counter state mm:00000000c621fb0b type:MM_FILEPAGES val:33 [ 35.796894] BUG: Bad rss-counter state mm:00000000c621fb0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48984' (ECDSA) to the list of known hosts. 2023/06/20 06:22:53 fuzzer started 2023/06/20 06:22:53 dialing manager at localhost:44161 2023/06/20 06:22:53 checking machine... 2023/06/20 06:22:53 checking revisions... [ 36.559377] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:22:54 testing simple program... [ 36.609113] cgroup: Unknown subsys name 'net' [ 36.673479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:52 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e05f24 RSI=ffffffff846000aa RDI=ffff88800f02f990 RBP=ffff88800f02f960 RSP=ffff88800f02f8c0 R8 =0000000000000001 R9 =ffff88800f02f908 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800f02f990 R13=0000000000000000 R14=ffff888016471b40 R15=0000000000092c40 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fd3b17be900 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=00007fd3b1d73650 CR3=000000000d9c0000 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=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 info registers vcpu 1 RAX=ffffffff8450b075 RBX=ffffffff8604dcec RCX=ffffffff8450b05d RDX=0000000000000000 RSI=ffffffff864b1140 RDI=ffffffff8604dccc RBP=ffffffff8604dccc RSP=ffff88806cf099b8 R8 =ffffffff864b1140 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b523e R12=ffffffff8604dd10 R13=ffffffff8604dccc R14=ffffffff8604dccc R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000287 [--S--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 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=00007f5965924880 CR3=000000000dc12000 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=2033353a32323a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000