syzkaller login: [ 41.150751] BUG: Bad rss-counter state mm:0000000076af05d6 type:MM_FILEPAGES val:33 [ 41.151673] BUG: Bad rss-counter state mm:0000000076af05d6 type:MM_ANONPAGES val:22 [ 41.307459] ================================================================== [ 41.308599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.309589] Read of size 8 at addr ffff888018cf5140 by task sshd/226 [ 41.310449] [ 41.310671] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.311598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.312645] Call Trace: [ 41.312975] [ 41.313266] dump_stack_lvl+0x91/0xf0 [ 41.313772] print_report+0xcc/0x620 [ 41.314280] ? __virt_addr_valid+0x102/0x340 [ 41.314856] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.315490] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.316154] kasan_report+0xbe/0xf0 [ 41.316657] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.317313] vma_interval_tree_remove+0xc75/0xec0 [ 41.317952] vma_prepare+0xc54/0x11a0 [ 41.318455] __split_vma+0x5af/0x950 [ 41.318947] ? __pfx___split_vma+0x10/0x10 [ 41.319493] ? find_held_lock+0x2c/0x110 [ 41.320058] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.320639] ? lock_is_held_type+0x9f/0x120 [ 41.321201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.321839] ? mtree_range_walk+0x632/0x900 [ 41.322415] ? mas_walk+0x5c7/0x7c0 [ 41.322905] do_vmi_munmap+0x1f1/0x2b0 [ 41.323411] mmap_region+0x1f9/0x2660 [ 41.323923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.324446] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.325175] ? __pfx_lock_acquire+0x10/0x10 [ 41.325729] ? __pfx_mmap_region+0x10/0x10 [ 41.326284] ? security_mmap_addr+0x7d/0xa0 [ 41.326845] ? get_unmapped_area+0x1f5/0x3f0 [ 41.327417] do_mmap+0x854/0xf00 [ 41.327893] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.328409] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.328999] ksys_mmap_pgoff+0x3af/0x500 [ 41.329522] do_syscall_64+0x3f/0x90 [ 41.330022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.330700] RIP: 0033:0x7ff693934d82 [ 41.331178] 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 [ 41.333415] RSP: 002b:00007ffd6b0befe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.334359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff693934d82 [ 41.335243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff692d6e000 [ 41.336126] RBP: 00007ff692d6e000 R08: 0000000000000009 R09: 0000000000001000 [ 41.337012] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ab3283ec0 [ 41.337886] R13: 00007ffd6b0bf000 R14: 00007ffd6b0bf030 R15: 00007ffd6b0bf390 [ 41.338787] [ 41.339089] [ 41.339313] Allocated by task 219: [ 41.339762] kasan_save_stack+0x22/0x50 [ 41.340303] kasan_set_track+0x25/0x30 [ 41.340815] __kasan_slab_alloc+0x59/0x70 [ 41.341358] kmem_cache_alloc+0x16b/0x370 [ 41.341894] vm_area_dup+0x20/0x160 [ 41.342364] __split_vma+0x170/0x950 [ 41.342850] split_vma+0xc6/0x110 [ 41.343307] mprotect_fixup+0x8d2/0xb30 [ 41.343835] do_mprotect_pkey+0x87e/0xd40 [ 41.344400] __x64_sys_mprotect+0x78/0xc0 [ 41.344941] do_syscall_64+0x3f/0x90 [ 41.345434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.346100] [ 41.346318] Freed by task 13: [ 41.346722] kasan_save_stack+0x22/0x50 [ 41.347252] kasan_set_track+0x25/0x30 [ 41.347762] kasan_save_free_info+0x2b/0x50 [ 41.348330] __kasan_slab_free+0x10a/0x190 [ 41.348894] kmem_cache_free+0x10d/0x4d0 [ 41.349426] rcu_core+0x8c8/0x2860 [ 41.349892] __do_softirq+0x1b7/0x7d4 [ 41.350382] [ 41.350606] Last potentially related work creation: [ 41.351217] kasan_save_stack+0x22/0x50 [ 41.351740] __kasan_record_aux_stack+0x8e/0xa0 [ 41.352355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.353033] remove_vma+0x139/0x170 [ 41.353499] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.354076] do_vmi_munmap+0x1f1/0x2b0 [ 41.354578] __vm_munmap+0x138/0x3a0 [ 41.355064] __x64_sys_munmap+0x59/0x80 [ 41.355581] do_syscall_64+0x3f/0x90 [ 41.356089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.356758] [ 41.356985] The buggy address belongs to the object at ffff888018cf50e8 [ 41.356985] which belongs to the cache vm_area_struct of size 168 [ 41.358517] The buggy address is located 88 bytes inside of [ 41.358517] freed 168-byte region [ffff888018cf50e8, ffff888018cf5190) [ 41.359974] [ 41.360198] The buggy address belongs to the physical page: [ 41.360883] page:00000000e27f6d5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cf5 [ 41.362019] memcg:ffff8880164d4a01 [ 41.362466] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.363138] page_type: 0xffffffff() [ 41.363603] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.364571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164d4a01 [ 41.365528] page dumped because: kasan: bad access detected [ 41.366218] [ 41.366441] Memory state around the buggy address: [ 41.367129] ffff888018cf5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.368038] ffff888018cf5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 41.368936] >ffff888018cf5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.369823] ^ [ 41.370489] ffff888018cf5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.371407] ffff888018cf5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.372306] ================================================================== [ 41.373315] Disabling lock debugging due to kernel taint [ 43.546016] BUG: Bad rss-counter state mm:000000004a045d29 type:MM_FILEPAGES val:33 [ 43.547431] BUG: Bad rss-counter state mm:000000004a045d29 type:MM_ANONPAGES val:22 [ 43.948001] BUG: Bad rss-counter state mm:00000000f49fb3e0 type:MM_FILEPAGES val:32 [ 43.949000] BUG: Bad rss-counter state mm:00000000f49fb3e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53457' (ECDSA) to the list of known hosts. 2023/06/20 05:37:01 fuzzer started 2023/06/20 05:37:02 dialing manager at localhost:44161 2023/06/20 05:37:02 checking machine... 2023/06/20 05:37:02 checking revisions... [ 44.710248] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:37:02 testing simple program... [ 44.756953] cgroup: Unknown subsys name 'net' [ 44.810163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:52 Registers: info registers vcpu 0 RAX=ffff88800dac7400 RBX=0000000000000024 RCX=1ffff11001b58e8f RDX=dffffc0000000000 RSI=ffffffff81f17cfc RDI=ffff88800dac7478 RBP=ffff888019370c98 RSP=ffff888016b8f968 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000002 R14=1ffff11002d71f2f R15=0000000000000000 RIP=ffffffff81f17d46 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 00007f19d2023900 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=00007fff964ce000 CR3=000000000d612000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=00000000000018de RSI=00000000000018dd RDI=ffffffff864edf38 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307e3 RFL=00000216 [----AP-] 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 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=00007f587626e940 CR3=00000000198cc000 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=2031303a37333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a37333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000