syzkaller login: [ 30.632405] BUG: Bad rss-counter state mm:000000001c6d44f9 type:MM_FILEPAGES val:33 [ 30.633212] BUG: Bad rss-counter state mm:000000001c6d44f9 type:MM_ANONPAGES val:22 [ 30.768201] ================================================================== [ 30.768999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.769786] Read of size 8 at addr ffff88800f69db38 by task sshd/221 [ 30.770432] [ 30.770692] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.771545] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.772393] Call Trace: [ 30.772662] [ 30.772904] dump_stack_lvl+0x91/0xf0 [ 30.773347] print_report+0xcc/0x620 [ 30.773759] ? __virt_addr_valid+0x102/0x340 [ 30.774222] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775272] kasan_report+0xbe/0xf0 [ 30.775695] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776227] vma_interval_tree_remove+0xc75/0xec0 [ 30.776746] vma_prepare+0xc54/0x11a0 [ 30.777160] __split_vma+0x5af/0x950 [ 30.777564] ? __pfx___split_vma+0x10/0x10 [ 30.778018] ? find_held_lock+0x2c/0x110 [ 30.778473] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778958] ? lock_is_held_type+0x9f/0x120 [ 30.779423] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.779967] ? mtree_range_walk+0x632/0x900 [ 30.780444] ? mas_walk+0x5c7/0x7c0 [ 30.780848] do_vmi_munmap+0x1f1/0x2b0 [ 30.781262] mmap_region+0x1f9/0x2660 [ 30.781676] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.782117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.782726] ? __pfx_lock_acquire+0x10/0x10 [ 30.783181] ? __pfx_mmap_region+0x10/0x10 [ 30.783645] ? security_mmap_addr+0x7d/0xa0 [ 30.784106] ? get_unmapped_area+0x1f5/0x3f0 [ 30.784584] do_mmap+0x854/0xf00 [ 30.784956] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785380] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.785860] ksys_mmap_pgoff+0x3af/0x500 [ 30.786290] do_syscall_64+0x3f/0x90 [ 30.786702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787253] RIP: 0033:0x7f5b5a4b9d82 [ 30.787669] 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 [ 30.789514] RSP: 002b:00007ffcdfff7138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.790289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b5a4b9d82 [ 30.791019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b598f3000 [ 30.791754] RBP: 00007f5b598f3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.792490] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea78702ec0 [ 30.793219] R13: 00007ffcdfff7150 R14: 00007ffcdfff7180 R15: 00007ffcdfff74e0 [ 30.793964] [ 30.794214] [ 30.794402] Allocated by task 214: [ 30.794768] kasan_save_stack+0x22/0x50 [ 30.795205] kasan_set_track+0x25/0x30 [ 30.795641] __kasan_slab_alloc+0x59/0x70 [ 30.796085] kmem_cache_alloc+0x16b/0x370 [ 30.796525] vm_area_dup+0x20/0x160 [ 30.796914] __split_vma+0x170/0x950 [ 30.797373] split_vma+0xc6/0x110 [ 30.797790] mprotect_fixup+0x8d2/0xb30 [ 30.798479] do_mprotect_pkey+0x87e/0xd40 [ 30.799157] __x64_sys_mprotect+0x78/0xc0 [ 30.799847] do_syscall_64+0x3f/0x90 [ 30.800462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801285] [ 30.801559] Freed by task 214: [ 30.802070] kasan_save_stack+0x22/0x50 [ 30.802721] kasan_set_track+0x25/0x30 [ 30.803358] kasan_save_free_info+0x2b/0x50 [ 30.804061] __kasan_slab_free+0x10a/0x190 [ 30.804753] kmem_cache_free+0x10d/0x4d0 [ 30.805415] rcu_core+0x8c8/0x2860 [ 30.805997] __do_softirq+0x1b7/0x7d4 [ 30.806625] [ 30.806907] Last potentially related work creation: [ 30.807700] kasan_save_stack+0x22/0x50 [ 30.808358] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.809603] remove_vma+0x139/0x170 [ 30.810055] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810612] do_vmi_munmap+0x1f1/0x2b0 [ 30.811095] __vm_munmap+0x138/0x3a0 [ 30.811578] __x64_sys_munmap+0x59/0x80 [ 30.812083] do_syscall_64+0x3f/0x90 [ 30.812665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813319] [ 30.813534] The buggy address belongs to the object at ffff88800f69dae0 [ 30.813534] which belongs to the cache vm_area_struct of size 168 [ 30.815008] The buggy address is located 88 bytes inside of [ 30.815008] freed 168-byte region [ffff88800f69dae0, ffff88800f69db88) [ 30.816452] [ 30.816666] The buggy address belongs to the physical page: [ 30.817334] page:000000005561ce66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf69d [ 30.818426] memcg:ffff88800e3cab01 [ 30.818855] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.819510] page_type: 0xffffffff() [ 30.819978] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.820906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3cab01 [ 30.821825] page dumped because: kasan: bad access detected [ 30.822497] [ 30.822714] Memory state around the buggy address: [ 30.823303] ffff88800f69da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.824169] ffff88800f69da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.825036] >ffff88800f69db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.825907] ^ [ 30.826531] ffff88800f69db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.827392] ffff88800f69dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.828273] ================================================================== [ 30.829247] Disabling lock debugging due to kernel taint [ 32.780090] BUG: Bad rss-counter state mm:000000003e2c32ea type:MM_FILEPAGES val:33 [ 32.781136] BUG: Bad rss-counter state mm:000000003e2c32ea type:MM_ANONPAGES val:22 [ 33.319078] BUG: Bad rss-counter state mm:00000000aeb52785 type:MM_FILEPAGES val:33 [ 33.320084] BUG: Bad rss-counter state mm:00000000aeb52785 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43191' (ECDSA) to the list of known hosts. 2023/06/21 03:32:01 fuzzer started 2023/06/21 03:32:01 dialing manager at localhost:36067 2023/06/21 03:32:01 checking machine... 2023/06/21 03:32:01 checking revisions... [ 34.015111] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:32:01 testing simple program... [ 34.056387] cgroup: Unknown subsys name 'net' [ 34.096773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:32:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=1ffff1100289eeb0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880144f75d8 RSP=ffff8880144f7510 R8 =ffffffff860d825a R9 =ffff8880144f75c0 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880144f75e0 R13=ffff8880144f75c8 R14=ffff8880144f76b8 R15=ffff8880144f7580 RIP=ffffffff81131271 RFL=00000212 [----A--] 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 00007fbcf8f63900 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=00007fbcf8481000 CR3=0000000008dc8000 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=b7ddf230a5ff0e9c0f4383c3de03cc52 XMM02=eff9b2d0a8fce9cb000000000011a560 XMM03=2c67c8bc2e329bc3000000000011a688 XMM04=a5dfeb196533dd4b00000000000ae988 XMM05=3c11a8bf089e77b70000000000132e68 XMM06=e4cb8bb95a7664b60000000000131d00 XMM07=fb795ef6d65770560000000000121f30 XMM08=2c67c8bc2e329bc3000000000011a688 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8180a924 RCX=0000000000000001 RDX=1ffff1100193fdee RSI=ffff88800c9ff328 RDI=ffffffff8180a924 RBP=ffffffff8180a924 RSP=ffff88800c9feec8 R8 =0000000000000001 R9 =ffff88800c9fef58 R10=0000000000038001 R11=0000000000021ee8 R12=0000000000000001 R13=0000000000000000 R14=ffff88800d959b40 R15=0000000000092800 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f5d943f4900 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=00007f5d943be008 CR3=000000000d89e000 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=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