[ 31.553414] BUG: Bad rss-counter state mm:000000003c542e7c type:MM_FILEPAGES val:33 [ 31.554878] BUG: Bad rss-counter state mm:000000003c542e7c type:MM_ANONPAGES val:22 [ 31.716179] ================================================================== [ 31.717083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.718023] Read of size 8 at addr ffff88800e97fdf0 by task sshd/219 [ 31.718937] [ 31.719171] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.720062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.721058] Call Trace: [ 31.721387] [ 31.721675] dump_stack_lvl+0x91/0xf0 [ 31.722171] print_report+0xcc/0x620 [ 31.722660] ? __virt_addr_valid+0x102/0x340 [ 31.723223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.723888] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.724523] kasan_report+0xbe/0xf0 [ 31.724999] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.725629] vma_interval_tree_remove+0xc75/0xec0 [ 31.726232] vma_prepare+0xc54/0x11a0 [ 31.726716] __split_vma+0x5af/0x950 [ 31.727190] ? __pfx___split_vma+0x10/0x10 [ 31.727733] ? find_held_lock+0x2c/0x110 [ 31.728262] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.728829] ? lock_is_held_type+0x9f/0x120 [ 31.729379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.729986] ? mtree_range_walk+0x632/0x900 [ 31.730545] ? mas_walk+0x5c7/0x7c0 [ 31.731024] do_vmi_munmap+0x1f1/0x2b0 [ 31.731529] mmap_region+0x1f9/0x2660 [ 31.732019] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.732534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.733248] ? __pfx_lock_acquire+0x10/0x10 [ 31.733791] ? __pfx_mmap_region+0x10/0x10 [ 31.734335] ? security_mmap_addr+0x7d/0xa0 [ 31.734874] ? get_unmapped_area+0x1f5/0x3f0 [ 31.735451] do_mmap+0x854/0xf00 [ 31.735893] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.736395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.736970] ksys_mmap_pgoff+0x3af/0x500 [ 31.737486] do_syscall_64+0x3f/0x90 [ 31.737968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.738635] RIP: 0033:0x7f257fb07d82 [ 31.739093] 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 [ 31.741332] RSP: 002b:00007ffe821f2968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.742311] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f257fb07d82 [ 31.743255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f257ef41000 [ 31.744159] RBP: 00007f257ef41000 R08: 0000000000000009 R09: 0000000000001000 [ 31.745068] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585fd0afec0 [ 31.745999] R13: 00007ffe821f2980 R14: 00007ffe821f29b0 R15: 00007ffe821f2d10 [ 31.746908] [ 31.747221] [ 31.747461] Allocated by task 211: [ 31.747920] kasan_save_stack+0x22/0x50 [ 31.748454] kasan_set_track+0x25/0x30 [ 31.748991] __kasan_slab_alloc+0x59/0x70 [ 31.749557] kmem_cache_alloc+0x16b/0x370 [ 31.750114] vm_area_dup+0x20/0x160 [ 31.750604] __split_vma+0x170/0x950 [ 31.751095] split_vma+0xc6/0x110 [ 31.751567] mprotect_fixup+0x8d2/0xb30 [ 31.752098] do_mprotect_pkey+0x87e/0xd40 [ 31.752653] __x64_sys_mprotect+0x78/0xc0 [ 31.753207] do_syscall_64+0x3f/0x90 [ 31.753708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.754377] [ 31.754605] Freed by task 211: [ 31.755024] kasan_save_stack+0x22/0x50 [ 31.755581] kasan_set_track+0x25/0x30 [ 31.756108] kasan_save_free_info+0x2b/0x50 [ 31.756680] __kasan_slab_free+0x10a/0x190 [ 31.757259] kmem_cache_free+0x10d/0x4d0 [ 31.757830] rcu_core+0x8c8/0x2860 [ 31.758300] __do_softirq+0x1b7/0x7d4 [ 31.758806] [ 31.759034] Last potentially related work creation: [ 31.759720] kasan_save_stack+0x22/0x50 [ 31.760262] __kasan_record_aux_stack+0x8e/0xa0 [ 31.760883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.761562] remove_vma+0x139/0x170 [ 31.762037] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.762620] do_vmi_munmap+0x1f1/0x2b0 [ 31.763134] __vm_munmap+0x138/0x3a0 [ 31.763654] __x64_sys_munmap+0x59/0x80 [ 31.764191] do_syscall_64+0x3f/0x90 [ 31.764683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.765365] [ 31.765591] Second to last potentially related work creation: [ 31.766313] kasan_save_stack+0x22/0x50 [ 31.766849] __kasan_record_aux_stack+0x8e/0xa0 [ 31.767485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.768161] remove_vma+0x139/0x170 [ 31.768639] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.769228] do_vmi_munmap+0x1f1/0x2b0 [ 31.769735] mmap_region+0x1f9/0x2660 [ 31.770239] do_mmap+0x854/0xf00 [ 31.770694] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.771187] ksys_mmap_pgoff+0x3af/0x500 [ 31.771719] do_syscall_64+0x3f/0x90 [ 31.772224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.772915] [ 31.773144] The buggy address belongs to the object at ffff88800e97fd98 [ 31.773144] which belongs to the cache vm_area_struct of size 168 [ 31.774767] The buggy address is located 88 bytes inside of [ 31.774767] freed 168-byte region [ffff88800e97fd98, ffff88800e97fe40) [ 31.776397] [ 31.776625] The buggy address belongs to the physical page: [ 31.777359] page:000000003ac7d118 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe97f [ 31.778581] memcg:ffff88800e09f301 [ 31.779045] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.779817] page_type: 0xffffffff() [ 31.780307] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393cc0 dead000000000004 [ 31.781283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e09f301 [ 31.782288] page dumped because: kasan: bad access detected [ 31.783019] [ 31.783266] Memory state around the buggy address: [ 31.783938] ffff88800e97fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.784922] ffff88800e97fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.785818] >ffff88800e97fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.786737] ^ [ 31.787614] ffff88800e97fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.788531] ffff88800e97fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.789488] ================================================================== [ 31.790481] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.263388] BUG: Bad rss-counter state mm:000000007b0ccecc type:MM_FILEPAGES val:33 [ 34.264657] BUG: Bad rss-counter state mm:000000007b0ccecc type:MM_ANONPAGES val:22 [ 34.736573] BUG: Bad rss-counter state mm:00000000a1c102e8 type:MM_FILEPAGES val:33 [ 34.737579] BUG: Bad rss-counter state mm:00000000a1c102e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36166' (ECDSA) to the list of known hosts. 2023/06/20 18:38:09 fuzzer started 2023/06/20 18:38:10 dialing manager at localhost:36067 2023/06/20 18:38:10 checking machine... 2023/06/20 18:38:10 checking revisions... [ 35.498327] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:38:10 testing simple program... [ 35.537961] cgroup: Unknown subsys name 'net' [ 35.598535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:38:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff8450cc7f RDI=ffff88806ce09b68 RBP=0000000000000019 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008abe0 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801026b680 R15=ffff88801a3f42e0 RIP=ffffffff813ad4cf RFL=00000283 [--S---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 00007f51804ed900 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=00007f517f933cc0 CR3=000000000e4b4000 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=86450dfc04ec6d9b6c4e29e6a93ccc6b XMM02=eff9b2d0a8fce9cb000000000011bda0 XMM03=2c67c8bc2e329bc3000000000011bec8 XMM04=e1a33ee751d04a6a00000000000ae988 XMM05=a00f86196ef653cb0000000000134448 XMM06=93c3553cc2c3b42c0000000000132e78 XMM07=fb795ef6d65770560000000000122068 XMM08=2c67c8bc2e329bc3000000000011bec8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809add RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d62f5f0 RSI=ffffffff81809add RDI=ffff88800d62f5a8 RBP=ffff88800d62f600 RSP=ffff88800d62f538 R8 =0000000000000001 R9 =ffff88800d62f5e8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88800d62f670 R13=ffff88800d62f5f0 R14=ffff888019c5d1c0 R15=ffff88800d62f5a8 RIP=ffffffff81130641 RFL=00000246 [---Z-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 00007ff9b8737900 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=00007ff9b8cee618 CR3=000000000ce8c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000