syzkaller login: [ 31.199456] BUG: Bad rss-counter state mm:000000006a1ab9b8 type:MM_FILEPAGES val:33 [ 31.200693] BUG: Bad rss-counter state mm:000000006a1ab9b8 type:MM_ANONPAGES val:22 [ 31.239088] ================================================================== [ 31.240332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.241618] Read of size 8 at addr ffff888018ded310 by task sshd/220 [ 31.242550] [ 31.242816] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.243877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.245069] Call Trace: [ 31.245471] [ 31.245816] dump_stack_lvl+0x91/0xf0 [ 31.246422] print_report+0xcc/0x620 [ 31.247018] ? __virt_addr_valid+0x102/0x340 [ 31.247689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248446] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249231] kasan_report+0xbe/0xf0 [ 31.249802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250558] vma_interval_tree_remove+0xc75/0xec0 [ 31.251298] vma_prepare+0xc54/0x11a0 [ 31.251881] __split_vma+0x5af/0x950 [ 31.252453] ? __pfx___split_vma+0x10/0x10 [ 31.253120] ? find_held_lock+0x2c/0x110 [ 31.253753] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.254437] ? lock_is_held_type+0x9f/0x120 [ 31.255088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.255825] ? mtree_range_walk+0x632/0x900 [ 31.256496] ? mas_walk+0x5c7/0x7c0 [ 31.257080] do_vmi_munmap+0x1f1/0x2b0 [ 31.257630] mmap_region+0x1f9/0x2660 [ 31.258166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.258721] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.259479] ? __pfx_lock_acquire+0x10/0x10 [ 31.260058] ? __pfx_mmap_region+0x10/0x10 [ 31.260644] ? security_mmap_addr+0x7d/0xa0 [ 31.261218] ? get_unmapped_area+0x1f5/0x3f0 [ 31.261814] do_mmap+0x854/0xf00 [ 31.262290] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.262818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.263451] ksys_mmap_pgoff+0x3af/0x500 [ 31.263991] do_syscall_64+0x3f/0x90 [ 31.264481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265152] RIP: 0033:0x7f7997689d82 [ 31.265623] 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 [ 31.267786] RSP: 002b:00007fff37c5a2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.268796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7997689d82 [ 31.269698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7996ac3000 [ 31.270604] RBP: 00007f7996ac3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.271503] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e32fbaaec0 [ 31.272427] R13: 00007fff37c5a2f0 R14: 00007fff37c5a320 R15: 00007fff37c5a680 [ 31.273379] [ 31.273709] [ 31.273950] Allocated by task 213: [ 31.274434] kasan_save_stack+0x22/0x50 [ 31.274998] kasan_set_track+0x25/0x30 [ 31.275549] __kasan_slab_alloc+0x59/0x70 [ 31.276136] kmem_cache_alloc+0x16b/0x370 [ 31.276727] vm_area_dup+0x20/0x160 [ 31.277234] __split_vma+0x170/0x950 [ 31.277758] split_vma+0xc6/0x110 [ 31.278255] mprotect_fixup+0x8d2/0xb30 [ 31.278808] do_mprotect_pkey+0x87e/0xd40 [ 31.279392] __x64_sys_mprotect+0x78/0xc0 [ 31.279974] do_syscall_64+0x3f/0x90 [ 31.280510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281253] [ 31.281492] Freed by task 213: [ 31.281931] kasan_save_stack+0x22/0x50 [ 31.282490] kasan_set_track+0x25/0x30 [ 31.283039] kasan_save_free_info+0x2b/0x50 [ 31.283638] __kasan_slab_free+0x10a/0x190 [ 31.284308] kmem_cache_free+0x10d/0x4d0 [ 31.284886] rcu_core+0x8c8/0x2860 [ 31.285374] __do_softirq+0x1b7/0x7d4 [ 31.285906] [ 31.286143] Last potentially related work creation: [ 31.286778] kasan_save_stack+0x22/0x50 [ 31.287310] __kasan_record_aux_stack+0x8e/0xa0 [ 31.287917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288608] remove_vma+0x139/0x170 [ 31.289092] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289680] do_vmi_munmap+0x1f1/0x2b0 [ 31.290193] __vm_munmap+0x138/0x3a0 [ 31.290693] __x64_sys_munmap+0x59/0x80 [ 31.291227] do_syscall_64+0x3f/0x90 [ 31.291736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292418] [ 31.292670] The buggy address belongs to the object at ffff888018ded2b8 [ 31.292670] which belongs to the cache vm_area_struct of size 168 [ 31.294239] The buggy address is located 88 bytes inside of [ 31.294239] freed 168-byte region [ffff888018ded2b8, ffff888018ded360) [ 31.295732] [ 31.295964] The buggy address belongs to the physical page: [ 31.296679] page:00000000ebbedea3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ded [ 31.297834] memcg:ffff88800f800701 [ 31.298269] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298924] page_type: 0xffffffff() [ 31.299408] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.300442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f800701 [ 31.301450] page dumped because: kasan: bad access detected [ 31.302177] [ 31.302411] Memory state around the buggy address: [ 31.303051] ffff888018ded200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.304000] ffff888018ded280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.304966] >ffff888018ded300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.305897] ^ [ 31.306417] ffff888018ded380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.307381] ffff888018ded400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.308337] ================================================================== [ 31.309432] Disabling lock debugging due to kernel taint [ 33.077069] BUG: Bad rss-counter state mm:00000000f41ae693 type:MM_FILEPAGES val:33 [ 33.078101] BUG: Bad rss-counter state mm:00000000f41ae693 type:MM_ANONPAGES val:22 [ 33.620240] BUG: Bad rss-counter state mm:00000000e91b80dc type:MM_FILEPAGES val:33 [ 33.621625] BUG: Bad rss-counter state mm:00000000e91b80dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9397' (ECDSA) to the list of known hosts. 2023/06/21 05:12:50 fuzzer started 2023/06/21 05:12:51 dialing manager at localhost:36067 2023/06/21 05:12:51 checking machine... 2023/06/21 05:12:51 checking revisions... [ 34.313448] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:12:51 testing simple program... [ 34.357385] cgroup: Unknown subsys name 'net' [ 34.404422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:50 Registers: info registers vcpu 0 RAX=0000000000800604 RBX=000055be5c829c20 RCX=000055be5c7e7010 RDX=00007ffcb4492ec8 RSI=0000000000000000 RDI=000055be5c82d180 RBP=000055be5c806350 RSP=00007ffcb4492eb0 R8 =000055be5c82c2c0 R9 =0000000000000000 R10=00007f5f9fbd1e10 R11=0000000000000000 R12=0000000000000006 R13=000055be5c806350 R14=0000000000000000 R15=0000000000000001 RIP=00007f5f9f654910 RFL=00000206 [-----P-] 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 00007f5f9f67f900 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=00007f5f9fc34650 CR3=000000000e900000 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=ffffffffffffffffffff000000000000 XMM01=01000101010101010100ffffffffffff XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007fa636391000 CR3=000000000c536000 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=bc2a62ef952bc897d647e0392ae86586 XMM02=000000000011a678eff9b2d0a8fce9cb XMM03=000000000011a7482c67c8bc2e329bc3 XMM04=403f807570baf3c900000000000ae988 XMM05=59d5b690e0af863b0000000000131ae0 XMM06=995941d367430f990000000000130948 XMM07=e042d86d42eb936e0000000000121ea8 XMM08=29680b2afc41e7de000000000011a748 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000