syzkaller login: [ 33.004974] BUG: Bad rss-counter state mm:00000000183fe69b type:MM_FILEPAGES val:33 [ 33.005724] BUG: Bad rss-counter state mm:00000000183fe69b type:MM_ANONPAGES val:22 [ 33.209352] ================================================================== [ 33.210035] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.210875] Read of size 8 at addr ffff888019ef4df0 by task sshd/221 [ 33.211384] [ 33.211530] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.212079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.212726] Call Trace: [ 33.212934] [ 33.213119] dump_stack_lvl+0x91/0xf0 [ 33.213463] print_report+0xcc/0x620 [ 33.213802] ? __virt_addr_valid+0x102/0x340 [ 33.214154] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.216123] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.216645] kasan_report+0xbe/0xf0 [ 33.216987] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.217400] vma_interval_tree_remove+0xc75/0xec0 [ 33.217804] vma_prepare+0xc54/0x11a0 [ 33.218122] __split_vma+0x5af/0x950 [ 33.218461] ? __pfx___split_vma+0x10/0x10 [ 33.218813] ? find_held_lock+0x2c/0x110 [ 33.219147] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.219550] ? lock_is_held_type+0x9f/0x120 [ 33.219907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.220302] ? mtree_range_walk+0x632/0x900 [ 33.220681] ? mas_walk+0x5c7/0x7c0 [ 33.220987] do_vmi_munmap+0x1f1/0x2b0 [ 33.221303] mmap_region+0x1f9/0x2660 [ 33.221667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.221998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.222606] ? __pfx_lock_acquire+0x10/0x10 [ 33.222947] ? __pfx_mmap_region+0x10/0x10 [ 33.223279] ? security_mmap_addr+0x7d/0xa0 [ 33.223675] ? get_unmapped_area+0x1f5/0x3f0 [ 33.224032] do_mmap+0x854/0xf00 [ 33.224328] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.224669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.225032] ksys_mmap_pgoff+0x3af/0x500 [ 33.225356] do_syscall_64+0x3f/0x90 [ 33.225674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.226095] RIP: 0033:0x7f824340bd82 [ 33.226838] 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 [ 33.231120] RSP: 002b:00007ffc3788a5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.232841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f824340bd82 [ 33.234538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8242845000 [ 33.236181] RBP: 00007f8242845000 R08: 0000000000000009 R09: 0000000000001000 [ 33.237798] R10: 0000000000000812 R11: 0000000000000206 R12: 000055873bf6aec0 [ 33.239404] R13: 00007ffc3788a5d0 R14: 00007ffc3788a600 R15: 00007ffc3788a960 [ 33.240996] [ 33.241541] [ 33.241919] Allocated by task 212: [ 33.242746] kasan_save_stack+0x22/0x50 [ 33.243692] kasan_set_track+0x25/0x30 [ 33.244592] __kasan_slab_alloc+0x59/0x70 [ 33.245502] kmem_cache_alloc+0x16b/0x370 [ 33.246494] vm_area_dup+0x20/0x160 [ 33.247290] __split_vma+0x170/0x950 [ 33.248152] split_vma+0xc6/0x110 [ 33.248948] mprotect_fixup+0x8d2/0xb30 [ 33.249882] do_mprotect_pkey+0x87e/0xd40 [ 33.250829] __x64_sys_mprotect+0x78/0xc0 [ 33.251789] do_syscall_64+0x3f/0x90 [ 33.252639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.253864] [ 33.254233] Freed by task 220: [ 33.254987] kasan_save_stack+0x22/0x50 [ 33.255938] kasan_set_track+0x25/0x30 [ 33.256853] kasan_save_free_info+0x2b/0x50 [ 33.257873] __kasan_slab_free+0x10a/0x190 [ 33.262926] kmem_cache_free+0x10d/0x4d0 [ 33.263880] rcu_core+0x8c8/0x2860 [ 33.264694] __do_softirq+0x1b7/0x7d4 [ 33.265552] [ 33.265922] Last potentially related work creation: [ 33.267070] kasan_save_stack+0x22/0x50 [ 33.267976] __kasan_record_aux_stack+0x8e/0xa0 [ 33.269018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.270193] remove_vma+0x139/0x170 [ 33.271033] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.272072] do_vmi_munmap+0x1f1/0x2b0 [ 33.272965] __vm_munmap+0x138/0x3a0 [ 33.273815] __x64_sys_munmap+0x59/0x80 [ 33.274744] do_syscall_64+0x3f/0x90 [ 33.275591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.276774] [ 33.277144] The buggy address belongs to the object at ffff888019ef4d98 [ 33.277144] which belongs to the cache vm_area_struct of size 168 [ 33.280003] The buggy address is located 88 bytes inside of [ 33.280003] freed 168-byte region [ffff888019ef4d98, ffff888019ef4e40) [ 33.282801] [ 33.283164] The buggy address belongs to the physical page: [ 33.284448] page:00000000bfd654bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ef4 [ 33.286602] memcg:ffff88800e633301 [ 33.287390] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.288641] page_type: 0xffffffff() [ 33.289447] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.291175] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e633301 [ 33.292893] page dumped because: kasan: bad access detected [ 33.294126] [ 33.294503] Memory state around the buggy address: [ 33.295583] ffff888019ef4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.297195] ffff888019ef4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.298850] >ffff888019ef4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.300467] ^ [ 33.301993] ffff888019ef4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.303655] ffff888019ef4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.305253] ================================================================== [ 33.307278] Disabling lock debugging due to kernel taint [ 35.598946] BUG: Bad rss-counter state mm:0000000092c9e162 type:MM_FILEPAGES val:33 [ 35.601243] BUG: Bad rss-counter state mm:0000000092c9e162 type:MM_ANONPAGES val:22 [ 36.132023] BUG: Bad rss-counter state mm:0000000048ca83fe type:MM_FILEPAGES val:33 [ 36.132657] BUG: Bad rss-counter state mm:0000000048ca83fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56695' (ECDSA) to the list of known hosts. 2023/06/20 09:55:11 fuzzer started 2023/06/20 09:55:11 dialing manager at localhost:44161 2023/06/20 09:55:11 checking machine... 2023/06/20 09:55:11 checking revisions... 2023/06/20 09:55:12 testing simple program... [ 36.923840] kmemleak: Automatic memory scanning thread ended [ 36.995286] cgroup: Unknown subsys name 'net' [ 37.089767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:55:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880169ff9f0 RCX=0000000000000000 RDX=1ffff11002c5ba01 RSI=ffffffff81749744 RDI=ffff8880162dd008 RBP=ffff8880162dd000 RSP=ffff8880169ff608 R8 =0000000000000007 R9 =0000000000000000 R10=ffffffffffffffff R11=0000000000000001 R12=000000000000001a R13=ffffea0001b3fd40 R14=ffff8880169ffa18 R15=dffffc0000000000 RIP=ffffffff81749780 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 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=00007fb857a9b790 CR3=000000001683a000 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=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00005601c8c514d0 CR3=000000000e822000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000