syzkaller login: [ 31.200225] BUG: Bad rss-counter state mm:000000005ad6999d type:MM_FILEPAGES val:33 [ 31.201775] BUG: Bad rss-counter state mm:000000005ad6999d type:MM_ANONPAGES val:22 [ 31.260673] ================================================================== [ 31.261596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.262540] Read of size 8 at addr ffff88800dfa03f8 by task sshd/221 [ 31.263314] [ 31.263530] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.264500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.265498] Call Trace: [ 31.265814] [ 31.266108] dump_stack_lvl+0x91/0xf0 [ 31.266594] print_report+0xcc/0x620 [ 31.267078] ? __virt_addr_valid+0x102/0x340 [ 31.267636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268245] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268893] kasan_report+0xbe/0xf0 [ 31.269376] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269995] vma_interval_tree_remove+0xc75/0xec0 [ 31.270602] vma_prepare+0xc54/0x11a0 [ 31.271081] __split_vma+0x5af/0x950 [ 31.271551] ? __pfx___split_vma+0x10/0x10 [ 31.272080] ? find_held_lock+0x2c/0x110 [ 31.272604] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.273181] ? lock_is_held_type+0x9f/0x120 [ 31.273721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.274337] ? mtree_range_walk+0x632/0x900 [ 31.274901] ? mas_walk+0x5c7/0x7c0 [ 31.275380] do_vmi_munmap+0x1f1/0x2b0 [ 31.275882] mmap_region+0x1f9/0x2660 [ 31.276370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.276902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.277619] ? __pfx_lock_acquire+0x10/0x10 [ 31.278151] ? __pfx_mmap_region+0x10/0x10 [ 31.278682] ? security_mmap_addr+0x7d/0xa0 [ 31.279213] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279762] do_mmap+0x854/0xf00 [ 31.280206] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.280696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.281277] ksys_mmap_pgoff+0x3af/0x500 [ 31.281798] do_syscall_64+0x3f/0x90 [ 31.282281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282933] RIP: 0033:0x7ff28ab0fd82 [ 31.283387] 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 [ 31.285511] RSP: 002b:00007ffc055df398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.286412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff28ab0fd82 [ 31.287258] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff289f49000 [ 31.288110] RBP: 00007ff289f49000 R08: 0000000000000009 R09: 0000000000001000 [ 31.288971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c03516ef70 [ 31.289823] R13: 00007ffc055df3b0 R14: 00007ffc055df3e0 R15: 00007ffc055df740 [ 31.290688] [ 31.290978] [ 31.291192] Allocated by task 214: [ 31.291618] kasan_save_stack+0x22/0x50 [ 31.292122] kasan_set_track+0x25/0x30 [ 31.292611] __kasan_slab_alloc+0x59/0x70 [ 31.293154] kmem_cache_alloc+0x16b/0x370 [ 31.293666] vm_area_dup+0x20/0x160 [ 31.294116] __split_vma+0x170/0x950 [ 31.294592] split_vma+0xc6/0x110 [ 31.295032] mprotect_fixup+0x8d2/0xb30 [ 31.295538] do_mprotect_pkey+0x87e/0xd40 [ 31.296060] __x64_sys_mprotect+0x78/0xc0 [ 31.296576] do_syscall_64+0x3f/0x90 [ 31.297059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297702] [ 31.297915] Freed by task 214: [ 31.298307] kasan_save_stack+0x22/0x50 [ 31.298814] kasan_set_track+0x25/0x30 [ 31.299307] kasan_save_free_info+0x2b/0x50 [ 31.299846] __kasan_slab_free+0x10a/0x190 [ 31.300384] kmem_cache_free+0x10d/0x4d0 [ 31.300906] rcu_core+0x8c8/0x2860 [ 31.301354] __do_softirq+0x1b7/0x7d4 [ 31.301842] [ 31.302061] Last potentially related work creation: [ 31.302668] kasan_save_stack+0x22/0x50 [ 31.303177] __kasan_record_aux_stack+0x8e/0xa0 [ 31.303750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.304399] remove_vma+0x139/0x170 [ 31.304861] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.305433] do_vmi_munmap+0x1f1/0x2b0 [ 31.305927] __vm_munmap+0x138/0x3a0 [ 31.306401] __x64_sys_munmap+0x59/0x80 [ 31.306911] do_syscall_64+0x3f/0x90 [ 31.307389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308049] [ 31.308264] Second to last potentially related work creation: [ 31.308975] kasan_save_stack+0x22/0x50 [ 31.309487] __kasan_record_aux_stack+0x8e/0xa0 [ 31.310062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.310706] remove_vma+0x139/0x170 [ 31.311160] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311726] do_vmi_munmap+0x1f1/0x2b0 [ 31.312216] mmap_region+0x1f9/0x2660 [ 31.312694] do_mmap+0x854/0xf00 [ 31.313128] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.313612] ksys_mmap_pgoff+0x3af/0x500 [ 31.314115] do_syscall_64+0x3f/0x90 [ 31.314590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315235] [ 31.315454] The buggy address belongs to the object at ffff88800dfa03a0 [ 31.315454] which belongs to the cache vm_area_struct of size 168 [ 31.316933] The buggy address is located 88 bytes inside of [ 31.316933] freed 168-byte region [ffff88800dfa03a0, ffff88800dfa0448) [ 31.318334] [ 31.318550] The buggy address belongs to the physical page: [ 31.319214] page:000000003f5a5498 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfa0 [ 31.320289] memcg:ffff8880140e0801 [ 31.320717] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.321388] page_type: 0xffffffff() [ 31.321839] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4000 dead000000000002 [ 31.322756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140e0801 [ 31.323660] page dumped because: kasan: bad access detected [ 31.324322] [ 31.324535] Memory state around the buggy address: [ 31.325128] ffff88800dfa0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.325975] ffff88800dfa0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.326839] >ffff88800dfa0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.327685] ^ [ 31.328530] ffff88800dfa0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.329410] ffff88800dfa0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.330257] ================================================================== [ 31.331225] Disabling lock debugging due to kernel taint [ 33.280454] BUG: Bad rss-counter state mm:0000000038382346 type:MM_FILEPAGES val:33 [ 33.281681] BUG: Bad rss-counter state mm:0000000038382346 type:MM_ANONPAGES val:22 [ 33.675363] BUG: Bad rss-counter state mm:00000000ef10c46a type:MM_FILEPAGES val:33 [ 33.676344] BUG: Bad rss-counter state mm:00000000ef10c46a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16536' (ECDSA) to the list of known hosts. 2023/06/20 23:38:19 fuzzer started 2023/06/20 23:38:19 dialing manager at localhost:36067 2023/06/20 23:38:19 checking machine... 2023/06/20 23:38:19 checking revisions... [ 34.426674] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:38:20 testing simple program... [ 34.478765] cgroup: Unknown subsys name 'net' [ 34.524038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:38:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135f RSI=1ffff1100d9c1355 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce09a98 R11=00000000000b6a61 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff81130682 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 00007faed56b9700 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=00007ff48c01d618 CR3=000000000fe9e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ff3cc358d00 CR3=000000000d6aa000 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=d68249266b858291b547958c0a32f25f XMM02=000000000011a4e8eff9b2d0a8fce9cb XMM03=000000000011a5b82c67c8bc2e329bc3 XMM04=b76c9480ea2a1da000000000000ae988 XMM05=834db22cefcb056d0000000000133430 XMM06=c291bd5c70af25b90000000000132e28 XMM07=e042d86d42eb936e0000000000121fe0 XMM08=dcf20ff0dc593558000000000011a5b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000