syzkaller login: [ 33.153566] BUG: Bad rss-counter state mm:00000000c2dbeed9 type:MM_FILEPAGES val:33 [ 33.154870] BUG: Bad rss-counter state mm:00000000c2dbeed9 type:MM_ANONPAGES val:22 [ 33.307339] ================================================================== [ 33.308419] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.309520] Read of size 8 at addr ffff888017f0f310 by task sshd/220 [ 33.310599] [ 33.310862] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.311876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.313016] Call Trace: [ 33.313336] [ 33.313617] dump_stack_lvl+0x91/0xf0 [ 33.314105] print_report+0xcc/0x620 [ 33.314599] ? __virt_addr_valid+0x102/0x340 [ 33.315150] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.315759] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.316384] kasan_report+0xbe/0xf0 [ 33.316858] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.317505] vma_interval_tree_remove+0xc75/0xec0 [ 33.318135] vma_prepare+0xc54/0x11a0 [ 33.318640] __split_vma+0x5af/0x950 [ 33.319131] ? __pfx___split_vma+0x10/0x10 [ 33.319681] ? find_held_lock+0x2c/0x110 [ 33.320222] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.320805] ? lock_is_held_type+0x9f/0x120 [ 33.321366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.321993] ? mtree_range_walk+0x632/0x900 [ 33.322593] ? mas_walk+0x5c7/0x7c0 [ 33.323088] do_vmi_munmap+0x1f1/0x2b0 [ 33.323597] mmap_region+0x1f9/0x2660 [ 33.324093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.324630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.325374] ? __pfx_lock_acquire+0x10/0x10 [ 33.325922] ? __pfx_mmap_region+0x10/0x10 [ 33.326481] ? security_mmap_addr+0x7d/0xa0 [ 33.327034] ? get_unmapped_area+0x1f5/0x3f0 [ 33.327605] do_mmap+0x854/0xf00 [ 33.328060] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.328572] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.329155] ksys_mmap_pgoff+0x3af/0x500 [ 33.329682] do_syscall_64+0x3f/0x90 [ 33.330177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.330848] RIP: 0033:0x7ff965d65d82 [ 33.331322] 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 [ 33.333549] RSP: 002b:00007ffedddb0a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.334505] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff965d65d82 [ 33.335391] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff96519f000 [ 33.336269] RBP: 00007ff96519f000 R08: 0000000000000009 R09: 0000000000001000 [ 33.337157] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605929b4ec0 [ 33.338042] R13: 00007ffedddb0a30 R14: 00007ffedddb0a60 R15: 00007ffedddb0dc0 [ 33.338941] [ 33.339241] [ 33.339466] Allocated by task 212: [ 33.339917] kasan_save_stack+0x22/0x50 [ 33.340441] kasan_set_track+0x25/0x30 [ 33.340947] __kasan_slab_alloc+0x59/0x70 [ 33.341495] kmem_cache_alloc+0x16b/0x370 [ 33.342029] vm_area_dup+0x20/0x160 [ 33.342499] __split_vma+0x170/0x950 [ 33.342984] split_vma+0xc6/0x110 [ 33.343443] mprotect_fixup+0x8d2/0xb30 [ 33.343969] do_mprotect_pkey+0x87e/0xd40 [ 33.344503] __x64_sys_mprotect+0x78/0xc0 [ 33.345045] do_syscall_64+0x3f/0x90 [ 33.345541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.346219] [ 33.346447] Freed by task 212: [ 33.346863] kasan_save_stack+0x22/0x50 [ 33.347385] kasan_set_track+0x25/0x30 [ 33.347900] kasan_save_free_info+0x2b/0x50 [ 33.348451] __kasan_slab_free+0x10a/0x190 [ 33.349001] kmem_cache_free+0x10d/0x4d0 [ 33.349529] rcu_core+0x8c8/0x2860 [ 33.349991] __do_softirq+0x1b7/0x7d4 [ 33.350491] [ 33.350713] Last potentially related work creation: [ 33.351314] kasan_save_stack+0x22/0x50 [ 33.351917] __kasan_record_aux_stack+0x8e/0xa0 [ 33.352511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.353180] remove_vma+0x139/0x170 [ 33.353650] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.354249] do_vmi_munmap+0x1f1/0x2b0 [ 33.354757] __vm_munmap+0x138/0x3a0 [ 33.355242] __x64_sys_munmap+0x59/0x80 [ 33.355753] do_syscall_64+0x3f/0x90 [ 33.356242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.356906] [ 33.357130] The buggy address belongs to the object at ffff888017f0f2b8 [ 33.357130] which belongs to the cache vm_area_struct of size 168 [ 33.358660] The buggy address is located 88 bytes inside of [ 33.358660] freed 168-byte region [ffff888017f0f2b8, ffff888017f0f360) [ 33.360114] [ 33.360337] The buggy address belongs to the physical page: [ 33.361024] page:000000002715e410 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f0f [ 33.362164] memcg:ffff88800e063201 [ 33.362613] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.363284] page_type: 0xffffffff() [ 33.363749] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.364704] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e063201 [ 33.365644] page dumped because: kasan: bad access detected [ 33.366350] [ 33.366572] Memory state around the buggy address: [ 33.367170] ffff888017f0f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.368058] ffff888017f0f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.368950] >ffff888017f0f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.369839] ^ [ 33.370330] ffff888017f0f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.371252] ffff888017f0f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.372149] ================================================================== [ 33.373108] Disabling lock debugging due to kernel taint [ 35.851599] BUG: Bad rss-counter state mm:000000005164b30b type:MM_FILEPAGES val:33 [ 35.852610] BUG: Bad rss-counter state mm:000000005164b30b type:MM_ANONPAGES val:22 [ 36.341568] BUG: Bad rss-counter state mm:00000000f631aa06 type:MM_FILEPAGES val:33 [ 36.342588] BUG: Bad rss-counter state mm:00000000f631aa06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41132' (ECDSA) to the list of known hosts. 2023/06/19 23:53:51 fuzzer started 2023/06/19 23:53:51 dialing manager at localhost:44161 2023/06/19 23:53:51 checking machine... 2023/06/19 23:53:51 checking revisions... [ 37.079751] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:53:51 testing simple program... [ 37.127739] cgroup: Unknown subsys name 'net' [ 37.177649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:53:48 Registers: info registers vcpu 0 RAX=00007f3d5804b1a0 RBX=0000000000000000 RCX=0000000000000d68 RDX=00007f3d5804b608 RSI=00007f3d5804a8a0 RDI=0000559a6268af08 RBP=00007ffdf10d7cd0 RSP=00007ffdf10d7780 R8 =0000000000000000 R9 =00007ffdf10d7de0 R10=00007ffdf10d81e0 R11=0000000000000000 R12=00007ffdf10d7cf0 R13=0000559a6268af08 R14=00007ffdf10d7e70 R15=0000000000008000 RIP=00007f3d57ef4d54 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3d576c0900 00000000 00000000 GS =0000 0000000000000000 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=00007f3d56b0fd50 CR3=000000000c966000 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=25252525252525252525252525252525 XMM01=00000000ff00ff000000000000000000 XMM02=00000000ff0000000000000000000000 XMM03=006c616e72756f6a2f646d6574737973 XMM04=3276efa95625c28b00000000000ae988 XMM05=f3088bc3351bec030000000000134fc8 XMM06=19e9129bd510f2350000000000133e60 XMM07=fb795ef6d657705600000000001242d8 XMM08=4c5359530069253d595449524f495250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=8e89456e21a76700 RBX=0000557cd9731ec0 RCX=0000557cd96ee010 RDX=0000000000000003 RSI=0000000000000007 RDI=0000557cd9712c50 RBP=0000000000000008 RSP=00007fff3335f610 R8 =0000557cd9732150 R9 =00322e322e302e30 R10=00007fff3335f2d7 R11=0000000000000000 R12=0000557cd9731ec0 R13=00007fff3335f6d0 R14=0000557cd9734f50 R15=00007fff3335f6d0 RIP=00007fae1e253342 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fae1d717900 00000000 00000000 GS =0000 0000000000000000 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=00007fae1dcce618 CR3=000000001abb6000 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=00000000000000ff0000000000000000 XMM02=d87be81168a95d728ab26c755195277c XMM03=985a0d96244d0200322e322e302e3031 XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000