[ 47.602805] BUG: Bad rss-counter state mm:00000000734da209 type:MM_FILEPAGES val:33 [ 47.603983] BUG: Bad rss-counter state mm:00000000734da209 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 47.765305] ================================================================== [ 47.766205] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.767142] Read of size 8 at addr ffff888016c154e0 by task sshd/220 [ 47.767930] [ 47.768147] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.769213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.770213] Call Trace: [ 47.770532] [ 47.770825] dump_stack_lvl+0x91/0xf0 [ 47.771400] print_report+0xcc/0x620 [ 47.771887] ? __virt_addr_valid+0x102/0x340 [ 47.772446] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.773075] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.773705] kasan_report+0xbe/0xf0 [ 47.774191] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.774825] vma_interval_tree_remove+0xc75/0xec0 [ 47.775449] vma_prepare+0xc54/0x11a0 [ 47.775927] __split_vma+0x5af/0x950 [ 47.776403] ? __pfx___split_vma+0x10/0x10 [ 47.776936] ? find_held_lock+0x2c/0x110 [ 47.777454] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.778021] ? lock_is_held_type+0x9f/0x120 [ 47.778558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.779165] ? mtree_range_walk+0x632/0x900 [ 47.779743] ? mas_walk+0x5c7/0x7c0 [ 47.780221] do_vmi_munmap+0x1f1/0x2b0 [ 47.780711] mmap_region+0x1f9/0x2660 [ 47.781190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.781700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.782414] ? __pfx_lock_acquire+0x10/0x10 [ 47.782952] ? __pfx_mmap_region+0x10/0x10 [ 47.783494] ? security_mmap_addr+0x7d/0xa0 [ 47.784036] ? get_unmapped_area+0x1f5/0x3f0 [ 47.784599] do_mmap+0x854/0xf00 [ 47.785045] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.785544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.786108] ksys_mmap_pgoff+0x3af/0x500 [ 47.786616] do_syscall_64+0x3f/0x90 [ 47.787110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.787772] RIP: 0033:0x7fca5a293d82 [ 47.788231] 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 [ 47.790387] RSP: 002b:00007ffc58d4e8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.791318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca5a293d82 [ 47.792172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca596cd000 [ 47.793027] RBP: 00007fca596cd000 R08: 0000000000000009 R09: 0000000000001000 [ 47.793881] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b87025b980 [ 47.794732] R13: 00007ffc58d4e8f0 R14: 00007ffc58d4e920 R15: 00007ffc58d4ec80 [ 47.795596] [ 47.795887] [ 47.796103] Allocated by task 213: [ 47.796543] kasan_save_stack+0x22/0x50 [ 47.797049] kasan_set_track+0x25/0x30 [ 47.797542] __kasan_slab_alloc+0x59/0x70 [ 47.798074] kmem_cache_alloc+0x16b/0x370 [ 47.798591] vm_area_dup+0x20/0x160 [ 47.799048] __split_vma+0x170/0x950 [ 47.799527] split_vma+0xc6/0x110 [ 47.799965] mprotect_fixup+0x8d2/0xb30 [ 47.800465] do_mprotect_pkey+0x87e/0xd40 [ 47.800985] __x64_sys_mprotect+0x78/0xc0 [ 47.801502] do_syscall_64+0x3f/0x90 [ 47.801973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.802610] [ 47.802829] Freed by task 213: [ 47.803247] kasan_save_stack+0x22/0x50 [ 47.803750] kasan_set_track+0x25/0x30 [ 47.804240] kasan_save_free_info+0x2b/0x50 [ 47.804769] __kasan_slab_free+0x10a/0x190 [ 47.805304] kmem_cache_free+0x10d/0x4d0 [ 47.805815] rcu_core+0x8c8/0x2860 [ 47.806267] __do_softirq+0x1b7/0x7d4 [ 47.806739] [ 47.806957] Last potentially related work creation: [ 47.807579] kasan_save_stack+0x22/0x50 [ 47.808083] __kasan_record_aux_stack+0x8e/0xa0 [ 47.808655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.809297] remove_vma+0x139/0x170 [ 47.809758] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.810384] do_vmi_munmap+0x1f1/0x2b0 [ 47.810871] __vm_munmap+0x138/0x3a0 [ 47.811361] __x64_sys_munmap+0x59/0x80 [ 47.811857] do_syscall_64+0x3f/0x90 [ 47.812329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.812969] [ 47.813184] Second to last potentially related work creation: [ 47.813863] kasan_save_stack+0x22/0x50 [ 47.814362] __kasan_record_aux_stack+0x8e/0xa0 [ 47.814932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.815584] remove_vma+0x139/0x170 [ 47.816036] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.816592] do_vmi_munmap+0x1f1/0x2b0 [ 47.817075] __vm_munmap+0x138/0x3a0 [ 47.817539] __x64_sys_munmap+0x59/0x80 [ 47.818034] do_syscall_64+0x3f/0x90 [ 47.818510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.819153] [ 47.819380] The buggy address belongs to the object at ffff888016c15488 [ 47.819380] which belongs to the cache vm_area_struct of size 168 [ 47.820862] The buggy address is located 88 bytes inside of [ 47.820862] freed 168-byte region [ffff888016c15488, ffff888016c15530) [ 47.822259] [ 47.822475] The buggy address belongs to the physical page: [ 47.823134] page:0000000079bddbf3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c15 [ 47.824244] memcg:ffff888019822601 [ 47.824671] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.825371] page_type: 0xffffffff() [ 47.825822] raw: 0100000000000200 ffff88800879fc80 ffffea00003839c0 dead000000000003 [ 47.826738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019822601 [ 47.827658] page dumped because: kasan: bad access detected [ 47.828323] [ 47.828539] Memory state around the buggy address: [ 47.829119] ffff888016c15380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.829982] ffff888016c15400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 47.830836] >ffff888016c15480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.831707] ^ [ 47.832464] ffff888016c15500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 47.833319] ffff888016c15580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.834170] ================================================================== [ 47.835085] Disabling lock debugging due to kernel taint [ 50.006928] BUG: Bad rss-counter state mm:0000000068f4661b type:MM_FILEPAGES val:33 [ 50.007918] BUG: Bad rss-counter state mm:0000000068f4661b type:MM_ANONPAGES val:22 [ 50.448089] BUG: Bad rss-counter state mm:00000000bf7b44ae type:MM_FILEPAGES val:33 [ 50.449080] BUG: Bad rss-counter state mm:00000000bf7b44ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25635' (ECDSA) to the list of known hosts. 2023/06/19 23:10:12 fuzzer started 2023/06/19 23:10:12 dialing manager at localhost:44161 2023/06/19 23:10:12 checking machine... 2023/06/19 23:10:12 checking revisions... [ 51.128935] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:10:12 testing simple program... [ 51.187164] cgroup: Unknown subsys name 'net' [ 51.236728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:09:48 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000e5e6789f RCX=ffff88806c73c4f8 RDX=0000000000000009 RSI=0000000000000003 RDI=0000000039d42106 RBP=ffff88801011d200 RSP=ffff888016f4fa80 R8 =00000000cbc73dda R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888016f4fae8 R15=0000000000000009 RIP=ffffffff82270f13 RFL=00000206 [-----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 00007f3d2be53900 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=00007f3d2c40b0b0 CR3=000000000d6ba000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd7dc40ae8 CR3=000000000e99e000 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=2031313a30313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a30313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000