syzkaller login: [ 34.238571] BUG: Bad rss-counter state mm:000000003ece131b type:MM_FILEPAGES val:33 [ 34.239986] BUG: Bad rss-counter state mm:000000003ece131b type:MM_ANONPAGES val:22 [ 34.269308] ================================================================== [ 34.270097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.270808] Read of size 8 at addr ffff888006af2b38 by task sshd/221 [ 34.271392] [ 34.271579] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.272191] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.272841] Call Trace: [ 34.273057] [ 34.273246] dump_stack_lvl+0x91/0xf0 [ 34.273573] print_report+0xcc/0x620 [ 34.273887] ? __virt_addr_valid+0x102/0x340 [ 34.274251] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.274662] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.275068] kasan_report+0xbe/0xf0 [ 34.275383] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.275797] vma_interval_tree_remove+0xc75/0xec0 [ 34.276194] vma_prepare+0xc54/0x11a0 [ 34.276519] __split_vma+0x5af/0x950 [ 34.276830] ? __pfx___split_vma+0x10/0x10 [ 34.277186] ? find_held_lock+0x2c/0x110 [ 34.277543] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.277920] ? lock_is_held_type+0x9f/0x120 [ 34.278278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.278687] ? mtree_range_walk+0x632/0x900 [ 34.279057] ? mas_walk+0x5c7/0x7c0 [ 34.279373] do_vmi_munmap+0x1f1/0x2b0 [ 34.279707] mmap_region+0x1f9/0x2660 [ 34.280030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.280375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.280857] ? __pfx_lock_acquire+0x10/0x10 [ 34.281216] ? __pfx_mmap_region+0x10/0x10 [ 34.281574] ? security_mmap_addr+0x7d/0xa0 [ 34.282066] ? get_unmapped_area+0x1f5/0x3f0 [ 34.282446] do_mmap+0x854/0xf00 [ 34.282746] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.283076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.283458] ksys_mmap_pgoff+0x3af/0x500 [ 34.283808] do_syscall_64+0x3f/0x90 [ 34.284135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.284568] RIP: 0033:0x7f0df4dadd82 [ 34.284878] 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 [ 34.286308] RSP: 002b:00007ffdb5a5fa48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.286921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0df4dadd82 [ 34.287495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0df41e7000 [ 34.288063] RBP: 00007f0df41e7000 R08: 0000000000000009 R09: 0000000000001000 [ 34.288643] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e728e14ec0 [ 34.289217] R13: 00007ffdb5a5fa60 R14: 00007ffdb5a5fa90 R15: 00007ffdb5a5fdf0 [ 34.289798] [ 34.289995] [ 34.290138] Allocated by task 214: [ 34.290431] kasan_save_stack+0x22/0x50 [ 34.290768] kasan_set_track+0x25/0x30 [ 34.291095] __kasan_slab_alloc+0x59/0x70 [ 34.291452] kmem_cache_alloc+0x16b/0x370 [ 34.291811] vm_area_dup+0x20/0x160 [ 34.292120] __split_vma+0x170/0x950 [ 34.292435] split_vma+0xc6/0x110 [ 34.292726] mprotect_fixup+0x8d2/0xb30 [ 34.293065] do_mprotect_pkey+0x87e/0xd40 [ 34.293415] __x64_sys_mprotect+0x78/0xc0 [ 34.293765] do_syscall_64+0x3f/0x90 [ 34.294082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.294516] [ 34.294659] Freed by task 214: [ 34.294925] kasan_save_stack+0x22/0x50 [ 34.295267] kasan_set_track+0x25/0x30 [ 34.295602] kasan_save_free_info+0x2b/0x50 [ 34.295958] __kasan_slab_free+0x10a/0x190 [ 34.296319] kmem_cache_free+0x10d/0x4d0 [ 34.296665] rcu_core+0x8c8/0x2860 [ 34.296962] __do_softirq+0x1b7/0x7d4 [ 34.297284] [ 34.297429] Last potentially related work creation: [ 34.297821] kasan_save_stack+0x22/0x50 [ 34.298157] __kasan_record_aux_stack+0x8e/0xa0 [ 34.298548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.298981] remove_vma+0x139/0x170 [ 34.299279] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.299665] do_vmi_munmap+0x1f1/0x2b0 [ 34.299992] __vm_munmap+0x138/0x3a0 [ 34.300308] __x64_sys_munmap+0x59/0x80 [ 34.300641] do_syscall_64+0x3f/0x90 [ 34.300955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.301382] [ 34.301525] Second to last potentially related work creation: [ 34.301987] kasan_save_stack+0x22/0x50 [ 34.302323] __kasan_record_aux_stack+0x8e/0xa0 [ 34.302710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.303139] remove_vma+0x139/0x170 [ 34.303445] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.303828] do_vmi_munmap+0x1f1/0x2b0 [ 34.304159] mmap_region+0x1f9/0x2660 [ 34.304479] do_mmap+0x854/0xf00 [ 34.304768] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.305099] ksys_mmap_pgoff+0x3af/0x500 [ 34.305429] do_syscall_64+0x3f/0x90 [ 34.305742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.306173] [ 34.306317] The buggy address belongs to the object at ffff888006af2ae0 [ 34.306317] which belongs to the cache vm_area_struct of size 168 [ 34.307315] The buggy address is located 88 bytes inside of [ 34.307315] freed 168-byte region [ffff888006af2ae0, ffff888006af2b88) [ 34.308274] [ 34.308419] The buggy address belongs to the physical page: [ 34.308861] page:00000000cf147110 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6af2 [ 34.309590] memcg:ffff888015a81801 [ 34.309873] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.310307] page_type: 0xffffffff() [ 34.310605] raw: 0100000000000200 ffff88800879fc80 ffffea000051bb40 dead000000000004 [ 34.311216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a81801 [ 34.311826] page dumped because: kasan: bad access detected [ 34.312267] [ 34.312412] Memory state around the buggy address: [ 34.312796] ffff888006af2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.313362] ffff888006af2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.313932] >ffff888006af2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.314495] ^ [ 34.314900] ffff888006af2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.315467] ffff888006af2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.316041] ================================================================== [ 34.316833] Disabling lock debugging due to kernel taint [ 36.603243] BUG: Bad rss-counter state mm:0000000007d75072 type:MM_FILEPAGES val:33 [ 36.604250] BUG: Bad rss-counter state mm:0000000007d75072 type:MM_ANONPAGES val:22 [ 37.162110] BUG: Bad rss-counter state mm:00000000b5267ecd type:MM_FILEPAGES val:33 [ 37.163097] BUG: Bad rss-counter state mm:00000000b5267ecd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61394' (ECDSA) to the list of known hosts. 2023/06/19 13:29:38 fuzzer started 2023/06/19 13:29:38 dialing manager at localhost:44161 2023/06/19 13:29:38 checking machine... 2023/06/19 13:29:38 checking revisions... [ 37.789805] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:29:38 testing simple program... [ 37.835379] cgroup: Unknown subsys name 'net' [ 37.876279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:29:34 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=00007f3a4ab37160 CR3=00000000145ee000 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=203da1627a3e9499824f788fb4640338 XMM02=000000000011c898ec2efd57dc4c00df XMM03=00000000001241080e0fcae5faf25457 XMM04=d7bb8bc082305c6100000000000ae988 XMM05=83b054bf15e9deb70000000000135ee0 XMM06=c291bd5c70af25b90000000000134fd8 XMM07=e042d86d42eb936e0000000000124388 XMM08=0e0fcae5faf25457000000000011c8f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff83640764 RCX=0000000000000001 RDX=1ffff110037d4e9e RSI=ffff88801bea7ce8 RDI=ffffffff83640764 RBP=ffffffff83640764 RSP=ffff88801bea7448 R8 =0000000000000001 R9 =ffff88801bea74d8 R10=0000000000038001 R11=000000000008a899 R12=0000000000000001 R13=0000000000000000 R14=ffff88801a1c1b40 R15=0000000000000cc0 RIP=ffffffff811fc772 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 00007f5ea51c9900 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=00007ffd7acdb000 CR3=0000000019ec2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000