syzkaller login: [ 50.062247] BUG: Bad rss-counter state mm:0000000008b9397b type:MM_FILEPAGES val:33 [ 50.063475] BUG: Bad rss-counter state mm:0000000008b9397b type:MM_ANONPAGES val:22 [ 50.214893] ================================================================== [ 50.215799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.216775] Read of size 8 at addr ffff888014134b38 by task sshd/220 [ 50.217557] [ 50.217787] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.218751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.219736] Call Trace: [ 50.220052] [ 50.220355] dump_stack_lvl+0x91/0xf0 [ 50.220841] print_report+0xcc/0x620 [ 50.221322] ? __virt_addr_valid+0x102/0x340 [ 50.221871] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.222492] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.223111] kasan_report+0xbe/0xf0 [ 50.223584] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.224207] vma_interval_tree_remove+0xc75/0xec0 [ 50.224810] vma_prepare+0xc54/0x11a0 [ 50.225288] __split_vma+0x5af/0x950 [ 50.225760] ? __pfx___split_vma+0x10/0x10 [ 50.226290] ? find_held_lock+0x2c/0x110 [ 50.226807] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.227387] ? lock_is_held_type+0x9f/0x120 [ 50.227925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.228547] ? mtree_range_walk+0x632/0x900 [ 50.229104] ? mas_walk+0x5c7/0x7c0 [ 50.229579] do_vmi_munmap+0x1f1/0x2b0 [ 50.230071] mmap_region+0x1f9/0x2660 [ 50.230554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.231083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.231793] ? __pfx_lock_acquire+0x10/0x10 [ 50.232330] ? __pfx_mmap_region+0x10/0x10 [ 50.232859] ? security_mmap_addr+0x7d/0xa0 [ 50.233387] ? get_unmapped_area+0x1f5/0x3f0 [ 50.233931] do_mmap+0x854/0xf00 [ 50.234369] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.234870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.235433] ksys_mmap_pgoff+0x3af/0x500 [ 50.235937] do_syscall_64+0x3f/0x90 [ 50.236411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.237054] RIP: 0033:0x7fa497ad1d82 [ 50.237512] 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 [ 50.239656] RSP: 002b:00007ffe3066a548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.240565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa497ad1d82 [ 50.241416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa496f0b000 [ 50.242255] RBP: 00007fa496f0b000 R08: 0000000000000009 R09: 0000000000001000 [ 50.243118] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d906222f70 [ 50.243968] R13: 00007ffe3066a560 R14: 00007ffe3066a590 R15: 00007ffe3066a8f0 [ 50.244828] [ 50.245120] [ 50.245334] Allocated by task 213: [ 50.245761] kasan_save_stack+0x22/0x50 [ 50.246264] kasan_set_track+0x25/0x30 [ 50.246752] __kasan_slab_alloc+0x59/0x70 [ 50.247285] kmem_cache_alloc+0x16b/0x370 [ 50.247799] vm_area_dup+0x20/0x160 [ 50.248273] __split_vma+0x170/0x950 [ 50.248745] split_vma+0xc6/0x110 [ 50.249181] mprotect_fixup+0x8d2/0xb30 [ 50.249688] do_mprotect_pkey+0x87e/0xd40 [ 50.250209] __x64_sys_mprotect+0x78/0xc0 [ 50.250730] do_syscall_64+0x3f/0x90 [ 50.251224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.251879] [ 50.252094] Freed by task 213: [ 50.252492] kasan_save_stack+0x22/0x50 [ 50.253000] kasan_set_track+0x25/0x30 [ 50.253505] kasan_save_free_info+0x2b/0x50 [ 50.254047] __kasan_slab_free+0x10a/0x190 [ 50.254588] kmem_cache_free+0x10d/0x4d0 [ 50.255102] rcu_core+0x8c8/0x2860 [ 50.255549] __do_softirq+0x1b7/0x7d4 [ 50.256019] [ 50.256233] Last potentially related work creation: [ 50.256820] kasan_save_stack+0x22/0x50 [ 50.257325] __kasan_record_aux_stack+0x8e/0xa0 [ 50.257904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.258547] remove_vma+0x139/0x170 [ 50.259015] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.259570] do_vmi_munmap+0x1f1/0x2b0 [ 50.260064] __vm_munmap+0x138/0x3a0 [ 50.260544] __x64_sys_munmap+0x59/0x80 [ 50.261039] do_syscall_64+0x3f/0x90 [ 50.261522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.262162] [ 50.262376] The buggy address belongs to the object at ffff888014134ae0 [ 50.262376] which belongs to the cache vm_area_struct of size 168 [ 50.263862] The buggy address is located 88 bytes inside of [ 50.263862] freed 168-byte region [ffff888014134ae0, ffff888014134b88) [ 50.265289] [ 50.265506] The buggy address belongs to the physical page: [ 50.266165] page:000000005c12ac16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14134 [ 50.267281] memcg:ffff88800d6b4c01 [ 50.267709] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.268359] page_type: 0xffffffff() [ 50.268807] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.269728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6b4c01 [ 50.270635] page dumped because: kasan: bad access detected [ 50.271321] [ 50.271548] Memory state around the buggy address: [ 50.272129] ffff888014134a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.272979] ffff888014134a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 50.273841] >ffff888014134b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.274700] ^ [ 50.275322] ffff888014134b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 50.276173] ffff888014134c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 50.277033] ================================================================== [ 50.278041] Disabling lock debugging due to kernel taint [ 51.532693] BUG: Bad rss-counter state mm:00000000473dec23 type:MM_FILEPAGES val:167 [ 51.533824] BUG: Bad rss-counter state mm:00000000473dec23 type:MM_ANONPAGES val:50 [ 51.535463] BUG: non-zero pgtables_bytes on freeing mm: 4096 [ 52.235936] BUG: Bad rss-counter state mm:0000000080a4d994 type:MM_FILEPAGES val:33 [ 52.236934] BUG: Bad rss-counter state mm:0000000080a4d994 type:MM_ANONPAGES val:22 [ 52.743918] BUG: Bad rss-counter state mm:00000000b7759036 type:MM_FILEPAGES val:33 [ 52.745567] BUG: Bad rss-counter state mm:00000000b7759036 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22839' (ECDSA) to the list of known hosts. 2023/06/19 15:17:02 fuzzer started 2023/06/19 15:17:03 dialing manager at localhost:44161 2023/06/19 15:17:03 checking machine... 2023/06/19 15:17:03 checking revisions... [ 53.516232] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:17:03 testing simple program... [ 53.572631] cgroup: Unknown subsys name 'net' [ 53.625130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:16:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81af6b94 RDX=ffff88800903b680 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888013fabb98 RSP=ffff8880090df2a0 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000001000 R11=0000000000000128 R12=0000000000001000 R13=0000000000000000 R14=ffff888019f36528 R15=ffff8880090df674 RIP=ffffffff814c07e4 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 0000000000000000 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=00007f21e09cc040 CR3=000000000ddd8000 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=2032303a37313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=1ffff1100d9e135c RSI=ffff88806cf09f50 RDI=ffff88806cf09ae8 RBP=ffffffff8540a108 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f50 R15=ffff88806cf09a98 RIP=ffffffff81131c60 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 00007fcd54faa900 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=00007ffebdb24000 CR3=000000000ec08000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000