[ 37.238398] BUG: Bad rss-counter state mm:00000000012c63f8 type:MM_FILEPAGES val:33 [ 37.239562] BUG: Bad rss-counter state mm:00000000012c63f8 type:MM_ANONPAGES val:22 [ 37.275897] ================================================================== [ 37.277022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.278113] Read of size 8 at addr ffff88800d867968 by task sshd/226 [ 37.279151] [ 37.279384] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.280341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.281524] Call Trace: [ 37.281934] [ 37.282231] dump_stack_lvl+0x91/0xf0 [ 37.282793] print_report+0xcc/0x620 [ 37.283366] ? __virt_addr_valid+0x102/0x340 [ 37.284038] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.284745] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.285446] kasan_report+0xbe/0xf0 [ 37.286007] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.286742] vma_interval_tree_remove+0xc75/0xec0 [ 37.287337] vma_prepare+0xc54/0x11a0 [ 37.287973] __split_vma+0x5af/0x950 [ 37.288503] ? __pfx___split_vma+0x10/0x10 [ 37.289029] ? find_held_lock+0x2c/0x110 [ 37.289566] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.290129] ? lock_is_held_type+0x9f/0x120 [ 37.290667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.291280] ? mtree_range_walk+0x632/0x900 [ 37.291834] ? mas_walk+0x5c7/0x7c0 [ 37.292305] do_vmi_munmap+0x1f1/0x2b0 [ 37.292801] mmap_region+0x1f9/0x2660 [ 37.293297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.293804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.294518] ? __pfx_lock_acquire+0x10/0x10 [ 37.295048] ? __pfx_mmap_region+0x10/0x10 [ 37.295581] ? security_mmap_addr+0x7d/0xa0 [ 37.296113] ? get_unmapped_area+0x1f5/0x3f0 [ 37.296667] do_mmap+0x854/0xf00 [ 37.297104] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.297604] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.298168] ksys_mmap_pgoff+0x3af/0x500 [ 37.298675] do_syscall_64+0x3f/0x90 [ 37.299148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.299793] RIP: 0033:0x7f88cf31ed82 [ 37.300249] 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 [ 37.302404] RSP: 002b:00007ffccd167218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.303309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88cf31ed82 [ 37.304170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88ce758000 [ 37.305019] RBP: 00007f88ce758000 R08: 0000000000000009 R09: 0000000000001000 [ 37.305879] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564924fd4d90 [ 37.306726] R13: 00007ffccd167230 R14: 00007ffccd167260 R15: 00007ffccd1675c0 [ 37.307584] [ 37.307876] [ 37.308093] Allocated by task 213: [ 37.308526] kasan_save_stack+0x22/0x50 [ 37.309042] kasan_set_track+0x25/0x30 [ 37.309538] __kasan_slab_alloc+0x59/0x70 [ 37.310078] kmem_cache_alloc+0x16b/0x370 [ 37.310593] vm_area_dup+0x20/0x160 [ 37.311055] __split_vma+0x170/0x950 [ 37.311525] split_vma+0xc6/0x110 [ 37.311963] mprotect_fixup+0x8d2/0xb30 [ 37.312468] do_mprotect_pkey+0x87e/0xd40 [ 37.312980] __x64_sys_mprotect+0x78/0xc0 [ 37.313530] do_syscall_64+0x3f/0x90 [ 37.314002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.314654] [ 37.314870] Freed by task 13: [ 37.315253] kasan_save_stack+0x22/0x50 [ 37.315760] kasan_set_track+0x25/0x30 [ 37.316252] kasan_save_free_info+0x2b/0x50 [ 37.316868] __kasan_slab_free+0x10a/0x190 [ 37.317407] kmem_cache_free+0x10d/0x4d0 [ 37.317918] rcu_core+0x8c8/0x2860 [ 37.318361] __do_softirq+0x1b7/0x7d4 [ 37.318846] [ 37.319066] Last potentially related work creation: [ 37.319644] kasan_save_stack+0x22/0x50 [ 37.320154] __kasan_record_aux_stack+0x8e/0xa0 [ 37.320732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.321387] remove_vma+0x139/0x170 [ 37.321845] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.322395] do_vmi_munmap+0x1f1/0x2b0 [ 37.322877] __vm_munmap+0x138/0x3a0 [ 37.323354] __x64_sys_munmap+0x59/0x80 [ 37.323856] do_syscall_64+0x3f/0x90 [ 37.324330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.324968] [ 37.325183] Second to last potentially related work creation: [ 37.325894] kasan_save_stack+0x22/0x50 [ 37.326409] __kasan_record_aux_stack+0x8e/0xa0 [ 37.326999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.327646] remove_vma+0x139/0x170 [ 37.328103] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.328656] do_vmi_munmap+0x1f1/0x2b0 [ 37.329143] mmap_region+0x1f9/0x2660 [ 37.329628] do_mmap+0x854/0xf00 [ 37.330057] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.330544] ksys_mmap_pgoff+0x3af/0x500 [ 37.331042] do_syscall_64+0x3f/0x90 [ 37.331514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.332162] [ 37.332376] The buggy address belongs to the object at ffff88800d867910 [ 37.332376] which belongs to the cache vm_area_struct of size 168 [ 37.333857] The buggy address is located 88 bytes inside of [ 37.333857] freed 168-byte region [ffff88800d867910, ffff88800d8679b8) [ 37.335274] [ 37.335490] The buggy address belongs to the physical page: [ 37.336144] page:00000000fd22afb6 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800d867000 pfn:0xd867 [ 37.337378] memcg:ffff88800d496501 [ 37.337805] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.338507] page_type: 0xffffffff() [ 37.338960] raw: 0100000000000200 ffff88800879fc80 ffffea000036ef80 dead000000000003 [ 37.339879] raw: ffff88800d867000 000000008011000e 00000001ffffffff ffff88800d496501 [ 37.340771] page dumped because: kasan: bad access detected [ 37.341438] [ 37.341652] Memory state around the buggy address: [ 37.342235] ffff88800d867800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.343096] ffff88800d867880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.343944] >ffff88800d867900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.344788] ^ [ 37.345584] ffff88800d867980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 37.346433] ffff88800d867a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.347278] ================================================================== [ 37.348201] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.049313] BUG: Bad rss-counter state mm:00000000d2bb09a8 type:MM_FILEPAGES val:33 [ 40.050256] BUG: Bad rss-counter state mm:00000000d2bb09a8 type:MM_ANONPAGES val:22 [ 40.541408] BUG: Bad rss-counter state mm:000000002440cb63 type:MM_FILEPAGES val:33 [ 40.542432] BUG: Bad rss-counter state mm:000000002440cb63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6534' (ECDSA) to the list of known hosts. 2023/06/19 13:19:43 fuzzer started 2023/06/19 13:19:43 dialing manager at localhost:44161 2023/06/19 13:19:43 checking machine... 2023/06/19 13:19:43 checking revisions... [ 41.274723] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:19:43 testing simple program... [ 41.326557] cgroup: Unknown subsys name 'net' [ 41.397831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcdbfa9e98 CR3=000000000e000000 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=2032343a39313a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39313a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800d90d1c0 RSI=ffffffff8171698d RDI=ffff888016467b18 RBP=00007ffdb087690c RSP=ffff88800d75fde8 R8 =0000000000000006 R9 =00007ffdb0880000 R10=00007ffdb087690c R11=0000000000000000 R12=ffff888016467ae0 R13=0000000000000000 R14=0000000000000001 R15=ffff888016467b10 RIP=ffffffff817169ad 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f80416b4900 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=00007ffdb087690c CR3=000000000dc8a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c616e626d3f657420322e322e301900 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000