[ 39.335767] BUG: Bad rss-counter state mm:000000004e857c50 type:MM_FILEPAGES val:33 [ 39.337051] BUG: Bad rss-counter state mm:000000004e857c50 type:MM_ANONPAGES val:22 [ 39.372651] ================================================================== [ 39.373667] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.374607] Read of size 8 at addr ffff88800eb46d08 by task sshd/219 [ 39.375381] [ 39.375601] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.376469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.377445] Call Trace: [ 39.377762] [ 39.378046] dump_stack_lvl+0x91/0xf0 [ 39.378541] print_report+0xcc/0x620 [ 39.379025] ? __virt_addr_valid+0x102/0x340 [ 39.379586] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.380212] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.380839] kasan_report+0xbe/0xf0 [ 39.381314] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.381938] vma_interval_tree_remove+0xc75/0xec0 [ 39.382546] vma_prepare+0xc54/0x11a0 [ 39.383022] __split_vma+0x5af/0x950 [ 39.383523] ? __pfx___split_vma+0x10/0x10 [ 39.384062] ? find_held_lock+0x2c/0x110 [ 39.384587] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.385155] ? lock_is_held_type+0x9f/0x120 [ 39.385694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.386313] ? mtree_range_walk+0x632/0x900 [ 39.386875] ? mas_walk+0x5c7/0x7c0 [ 39.387370] do_vmi_munmap+0x1f1/0x2b0 [ 39.387868] mmap_region+0x1f9/0x2660 [ 39.388360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.388875] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.389598] ? __pfx_lock_acquire+0x10/0x10 [ 39.390138] ? __pfx_mmap_region+0x10/0x10 [ 39.390665] ? security_mmap_addr+0x7d/0xa0 [ 39.391199] ? get_unmapped_area+0x1f5/0x3f0 [ 39.391763] do_mmap+0x854/0xf00 [ 39.392211] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.392703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.393265] ksys_mmap_pgoff+0x3af/0x500 [ 39.393779] do_syscall_64+0x3f/0x90 [ 39.394260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.394908] RIP: 0033:0x7f72305d8d82 [ 39.395392] 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 [ 39.397544] RSP: 002b:00007fff135c41e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.398457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72305d8d82 [ 39.399322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f722fa12000 [ 39.400333] RBP: 00007f722fa12000 R08: 0000000000000009 R09: 0000000000001000 [ 39.401192] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dda0e6aec0 [ 39.402050] R13: 00007fff135c4200 R14: 00007fff135c4230 R15: 00007fff135c4590 [ 39.402928] [ 39.403222] [ 39.403458] Allocated by task 212: [ 39.403891] kasan_save_stack+0x22/0x50 [ 39.404396] kasan_set_track+0x25/0x30 [ 39.404888] __kasan_slab_alloc+0x59/0x70 [ 39.405423] kmem_cache_alloc+0x16b/0x370 [ 39.405962] vm_area_dup+0x20/0x160 [ 39.406433] __split_vma+0x170/0x950 [ 39.406924] split_vma+0xc6/0x110 [ 39.407394] mprotect_fixup+0x8d2/0xb30 [ 39.407905] do_mprotect_pkey+0x87e/0xd40 [ 39.408461] __x64_sys_mprotect+0x78/0xc0 [ 39.409003] do_syscall_64+0x3f/0x90 [ 39.409479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.410147] [ 39.410362] Freed by task 212: [ 39.410774] kasan_save_stack+0x22/0x50 [ 39.411298] kasan_set_track+0x25/0x30 [ 39.411793] kasan_save_free_info+0x2b/0x50 [ 39.412334] __kasan_slab_free+0x10a/0x190 [ 39.412865] kmem_cache_free+0x10d/0x4d0 [ 39.413379] rcu_core+0x8c8/0x2860 [ 39.413833] __do_softirq+0x1b7/0x7d4 [ 39.414323] [ 39.414548] Last potentially related work creation: [ 39.415158] kasan_save_stack+0x22/0x50 [ 39.415692] __kasan_record_aux_stack+0x8e/0xa0 [ 39.416272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.416947] remove_vma+0x139/0x170 [ 39.417414] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.417976] do_vmi_munmap+0x1f1/0x2b0 [ 39.418469] __vm_munmap+0x138/0x3a0 [ 39.418946] __x64_sys_munmap+0x59/0x80 [ 39.419448] do_syscall_64+0x3f/0x90 [ 39.419920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.420563] [ 39.420788] Second to last potentially related work creation: [ 39.421493] kasan_save_stack+0x22/0x50 [ 39.422001] __kasan_record_aux_stack+0x8e/0xa0 [ 39.422586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.423229] remove_vma+0x139/0x170 [ 39.423691] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.424257] do_vmi_munmap+0x1f1/0x2b0 [ 39.424741] mmap_region+0x1f9/0x2660 [ 39.425219] do_mmap+0x854/0xf00 [ 39.425655] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.426144] ksys_mmap_pgoff+0x3af/0x500 [ 39.426649] do_syscall_64+0x3f/0x90 [ 39.427122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.427782] [ 39.427997] The buggy address belongs to the object at ffff88800eb46cb0 [ 39.427997] which belongs to the cache vm_area_struct of size 168 [ 39.429475] The buggy address is located 88 bytes inside of [ 39.429475] freed 168-byte region [ffff88800eb46cb0, ffff88800eb46d58) [ 39.430886] [ 39.431104] The buggy address belongs to the physical page: [ 39.431784] page:00000000c400bdaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb46 [ 39.432873] memcg:ffff88800eb42501 [ 39.433299] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.433944] page_type: 0xffffffff() [ 39.434398] raw: 0100000000000200 ffff88800879fc80 ffffea00003fb7c0 dead000000000008 [ 39.435342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb42501 [ 39.436252] page dumped because: kasan: bad access detected [ 39.436921] [ 39.437137] Memory state around the buggy address: [ 39.437725] ffff88800eb46c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.438586] ffff88800eb46c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.439462] >ffff88800eb46d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.440312] ^ [ 39.440757] ffff88800eb46d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.441618] ffff88800eb46e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.442472] ================================================================== [ 39.443705] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.380625] BUG: Bad rss-counter state mm:0000000083e2f4f4 type:MM_FILEPAGES val:33 [ 41.381850] BUG: Bad rss-counter state mm:0000000083e2f4f4 type:MM_ANONPAGES val:22 [ 41.909500] BUG: Bad rss-counter state mm:00000000394283fa type:MM_FILEPAGES val:33 [ 41.910620] BUG: Bad rss-counter state mm:00000000394283fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9151' (ECDSA) to the list of known hosts. 2023/06/19 21:07:34 fuzzer started 2023/06/19 21:07:35 dialing manager at localhost:44161 2023/06/19 21:07:35 checking machine... 2023/06/19 21:07:35 checking revisions... [ 42.552956] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:07:35 testing simple program... [ 42.601113] cgroup: Unknown subsys name 'net' [ 42.655175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:07:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a21a910 RCX=0000000000000000 RDX=ffff88801bc351c0 RSI=ffffffff8449f362 RDI=ffff888006bcfe30 RBP=00007f0eeca30000 RSP=ffff888006bcfce0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000003 R13=ffff88800dd21c00 R14=ffff88801a21a910 R15=00007f0eeca30fff RIP=ffffffff814c081b 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 00007f0eebedc900 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=00007f0eeca30044 CR3=000000001a1d4000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=ffff888008c58400 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=00007f66ff0a59a0 CR3=000000000ccc0000 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=aeb11301cb6c96a3674e82288c5fe678 XMM02=ec2efd57dc4c00df000000000011deb8 XMM03=b4ae7a4ac7af920d000000000011df88 XMM04=6223c6dd7ba20f2800000000000ae988 XMM05=dfcdbad4f1609c370000000000135600 XMM06=e98f378b8373258f00000000001347b8 XMM07=e042d86d42eb936e0000000000124ba0 XMM08=b4ae7a4ac7af920d000000000011df88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000