syzkaller login: [ 30.856505] BUG: Bad rss-counter state mm:000000009c862f37 type:MM_FILEPAGES val:33 [ 30.857598] BUG: Bad rss-counter state mm:000000009c862f37 type:MM_ANONPAGES val:22 [ 31.027198] ================================================================== [ 31.028111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.029034] Read of size 8 at addr ffff88800e2be5c8 by task sshd/220 [ 31.029788] [ 31.030004] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.031030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.032017] Call Trace: [ 31.032331] [ 31.032621] dump_stack_lvl+0x91/0xf0 [ 31.033108] print_report+0xcc/0x620 [ 31.033582] ? __virt_addr_valid+0x102/0x340 [ 31.034124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034737] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035340] kasan_report+0xbe/0xf0 [ 31.035821] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036444] vma_interval_tree_remove+0xc75/0xec0 [ 31.037041] vma_prepare+0xc54/0x11a0 [ 31.037514] __split_vma+0x5af/0x950 [ 31.037983] ? __pfx___split_vma+0x10/0x10 [ 31.038504] ? find_held_lock+0x2c/0x110 [ 31.039021] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.039583] ? lock_is_held_type+0x9f/0x120 [ 31.040124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.040723] ? mtree_range_walk+0x632/0x900 [ 31.041270] ? mas_walk+0x5c7/0x7c0 [ 31.041738] do_vmi_munmap+0x1f1/0x2b0 [ 31.042228] mmap_region+0x1f9/0x2660 [ 31.042698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.043204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.043924] ? __pfx_lock_acquire+0x10/0x10 [ 31.044443] ? __pfx_mmap_region+0x10/0x10 [ 31.044966] ? security_mmap_addr+0x7d/0xa0 [ 31.045485] ? get_unmapped_area+0x1f5/0x3f0 [ 31.046034] do_mmap+0x854/0xf00 [ 31.046464] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.047502] ksys_mmap_pgoff+0x3af/0x500 [ 31.048012] do_syscall_64+0x3f/0x90 [ 31.048489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049129] RIP: 0033:0x7f3ebe209d82 [ 31.049576] 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 [ 31.051673] RSP: 002b:00007fff63b4acd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.052559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ebe209d82 [ 31.053391] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ebd643000 [ 31.054212] RBP: 00007f3ebd643000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055028] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a213289b20 [ 31.055875] R13: 00007fff63b4acf0 R14: 00007fff63b4ad20 R15: 00007fff63b4b080 [ 31.056705] [ 31.056989] [ 31.057199] Allocated by task 213: [ 31.057617] kasan_save_stack+0x22/0x50 [ 31.058110] kasan_set_track+0x25/0x30 [ 31.058592] __kasan_slab_alloc+0x59/0x70 [ 31.059101] kmem_cache_alloc+0x16b/0x370 [ 31.059607] vm_area_dup+0x20/0x160 [ 31.060055] __split_vma+0x170/0x950 [ 31.060513] split_vma+0xc6/0x110 [ 31.060943] mprotect_fixup+0x8d2/0xb30 [ 31.061435] do_mprotect_pkey+0x87e/0xd40 [ 31.061950] __x64_sys_mprotect+0x78/0xc0 [ 31.062454] do_syscall_64+0x3f/0x90 [ 31.062919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063548] [ 31.063758] Freed by task 213: [ 31.064155] kasan_save_stack+0x22/0x50 [ 31.064648] kasan_set_track+0x25/0x30 [ 31.065127] kasan_save_free_info+0x2b/0x50 [ 31.065647] __kasan_slab_free+0x10a/0x190 [ 31.066167] kmem_cache_free+0x10d/0x4d0 [ 31.066665] rcu_core+0x8c8/0x2860 [ 31.067096] __do_softirq+0x1b7/0x7d4 [ 31.067561] [ 31.067770] Last potentially related work creation: [ 31.068366] kasan_save_stack+0x22/0x50 [ 31.068858] __kasan_record_aux_stack+0x8e/0xa0 [ 31.069424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.070050] remove_vma+0x139/0x170 [ 31.070489] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.071031] do_vmi_munmap+0x1f1/0x2b0 [ 31.071587] __vm_munmap+0x138/0x3a0 [ 31.072050] __x64_sys_munmap+0x59/0x80 [ 31.072536] do_syscall_64+0x3f/0x90 [ 31.072997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073621] [ 31.073831] Second to last potentially related work creation: [ 31.074504] kasan_save_stack+0x22/0x50 [ 31.074993] __kasan_record_aux_stack+0x8e/0xa0 [ 31.075558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.076188] remove_vma+0x139/0x170 [ 31.076632] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.077181] do_vmi_munmap+0x1f1/0x2b0 [ 31.077654] mmap_region+0x1f9/0x2660 [ 31.078125] do_mmap+0x854/0xf00 [ 31.078551] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.079029] ksys_mmap_pgoff+0x3af/0x500 [ 31.079519] do_syscall_64+0x3f/0x90 [ 31.080001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080632] [ 31.080843] The buggy address belongs to the object at ffff88800e2be570 [ 31.080843] which belongs to the cache vm_area_struct of size 168 [ 31.082266] The buggy address is located 88 bytes inside of [ 31.082266] freed 168-byte region [ffff88800e2be570, ffff88800e2be618) [ 31.083633] [ 31.083848] The buggy address belongs to the physical page: [ 31.084492] page:00000000cb959156 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2be [ 31.085545] memcg:ffff88800d143401 [ 31.085959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.086636] page_type: 0xffffffff() [ 31.087080] raw: 0100000000000200 ffff8880087a0c80 ffffea00003391c0 dead000000000007 [ 31.087990] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d143401 [ 31.088871] page dumped because: kasan: bad access detected [ 31.089513] [ 31.089723] Memory state around the buggy address: [ 31.090287] ffff88800e2be480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.091113] ffff88800e2be500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.091949] >ffff88800e2be580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.092769] ^ [ 31.093419] ffff88800e2be600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.094250] ffff88800e2be680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.095082] ================================================================== [ 31.095992] Disabling lock debugging due to kernel taint [ 33.163479] BUG: Bad rss-counter state mm:00000000009e111e type:MM_FILEPAGES val:33 [ 33.164600] BUG: Bad rss-counter state mm:00000000009e111e type:MM_ANONPAGES val:22 [ 33.733439] BUG: Bad rss-counter state mm:0000000093a0073e type:MM_FILEPAGES val:33 [ 33.734595] BUG: Bad rss-counter state mm:0000000093a0073e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39466' (ECDSA) to the list of known hosts. 2023/06/20 16:08:36 fuzzer started 2023/06/20 16:08:36 dialing manager at localhost:36067 2023/06/20 16:08:36 checking machine... 2023/06/20 16:08:36 checking revisions... [ 34.385533] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:08:36 testing simple program... [ 34.435576] cgroup: Unknown subsys name 'net' [ 34.475004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:08:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffffffff8460144a RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff8880159f9b40 R15=ffff88801a27f000 RIP=ffffffff813ad47e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f224c9e2900 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=00007f224cf97650 CR3=000000000f108000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f14d7251690 CR3=000000000ea08000 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=b312f85f02aab686604bb085d65ce03b XMM02=2c67c8bc2e329bc3000000000011cd08 XMM03=fb795ef6d65770560000000000123680 XMM04=dd89e4fc5af1231100000000000ae988 XMM05=ccace72a6ee1413d0000000000135270 XMM06=4fda316b135da52b0000000000134698 XMM07=e042d86d42eb936e0000000000123900 XMM08=12d31e563d7cc971000000000011cd68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000