syzkaller login: [ 35.010608] BUG: Bad rss-counter state mm:00000000a4b13ee1 type:MM_FILEPAGES val:33 [ 35.011848] BUG: Bad rss-counter state mm:00000000a4b13ee1 type:MM_ANONPAGES val:22 [ 35.192158] ================================================================== [ 35.193373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.194710] Read of size 8 at addr ffff88800f68e058 by task sshd/221 [ 35.195592] [ 35.195841] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.196872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.197990] Call Trace: [ 35.198356] [ 35.198687] dump_stack_lvl+0x91/0xf0 [ 35.199236] print_report+0xcc/0x620 [ 35.199778] ? __virt_addr_valid+0x102/0x340 [ 35.200403] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.201084] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.201757] kasan_report+0xbe/0xf0 [ 35.202277] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.202991] vma_interval_tree_remove+0xc75/0xec0 [ 35.203715] vma_prepare+0xc54/0x11a0 [ 35.204247] __split_vma+0x5af/0x950 [ 35.204777] ? __pfx___split_vma+0x10/0x10 [ 35.205368] ? find_held_lock+0x2c/0x110 [ 35.205958] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.206599] ? lock_is_held_type+0x9f/0x120 [ 35.207208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.207881] ? mtree_range_walk+0x632/0x900 [ 35.208504] ? mas_walk+0x5c7/0x7c0 [ 35.209031] do_vmi_munmap+0x1f1/0x2b0 [ 35.209581] mmap_region+0x1f9/0x2660 [ 35.210127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.210711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.211520] ? __pfx_lock_acquire+0x10/0x10 [ 35.212120] ? __pfx_mmap_region+0x10/0x10 [ 35.212743] ? security_mmap_addr+0x7d/0xa0 [ 35.213336] ? get_unmapped_area+0x1f5/0x3f0 [ 35.213949] do_mmap+0x854/0xf00 [ 35.214439] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.215014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.215677] ksys_mmap_pgoff+0x3af/0x500 [ 35.216243] do_syscall_64+0x3f/0x90 [ 35.216779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.217499] RIP: 0033:0x7f6375eccd82 [ 35.217999] 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 [ 35.220335] RSP: 002b:00007ffe100baa88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.221339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6375eccd82 [ 35.222273] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6375306000 [ 35.223200] RBP: 00007f6375306000 R08: 0000000000000009 R09: 0000000000001000 [ 35.224132] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f72e89eec0 [ 35.225069] R13: 00007ffe100baaa0 R14: 00007ffe100baad0 R15: 00007ffe100bae30 [ 35.226013] [ 35.226336] [ 35.226588] Allocated by task 214: [ 35.227064] kasan_save_stack+0x22/0x50 [ 35.227621] kasan_set_track+0x25/0x30 [ 35.228167] __kasan_slab_alloc+0x59/0x70 [ 35.228746] kmem_cache_alloc+0x16b/0x370 [ 35.229312] vm_area_dup+0x20/0x160 [ 35.229823] __split_vma+0x170/0x950 [ 35.230342] split_vma+0xc6/0x110 [ 35.230831] mprotect_fixup+0x8d2/0xb30 [ 35.231395] do_mprotect_pkey+0x87e/0xd40 [ 35.231976] __x64_sys_mprotect+0x78/0xc0 [ 35.232557] do_syscall_64+0x3f/0x90 [ 35.233081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.233793] [ 35.234031] Freed by task 214: [ 35.234462] kasan_save_stack+0x22/0x50 [ 35.235128] kasan_set_track+0x25/0x30 [ 35.235671] kasan_save_free_info+0x2b/0x50 [ 35.236260] __kasan_slab_free+0x10a/0x190 [ 35.236851] kmem_cache_free+0x10d/0x4d0 [ 35.237418] rcu_core+0x8c8/0x2860 [ 35.237896] __do_softirq+0x1b7/0x7d4 [ 35.238410] [ 35.238653] Last potentially related work creation: [ 35.239288] kasan_save_stack+0x22/0x50 [ 35.239833] __kasan_record_aux_stack+0x8e/0xa0 [ 35.240461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.241157] remove_vma+0x139/0x170 [ 35.241649] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.242253] do_vmi_munmap+0x1f1/0x2b0 [ 35.242787] __vm_munmap+0x138/0x3a0 [ 35.243294] __x64_sys_munmap+0x59/0x80 [ 35.243841] do_syscall_64+0x3f/0x90 [ 35.244360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.245060] [ 35.245291] The buggy address belongs to the object at ffff88800f68e000 [ 35.245291] which belongs to the cache vm_area_struct of size 168 [ 35.246914] The buggy address is located 88 bytes inside of [ 35.246914] freed 168-byte region [ffff88800f68e000, ffff88800f68e0a8) [ 35.248538] [ 35.248771] The buggy address belongs to the physical page: [ 35.249478] page:00000000d8dc07a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf68e [ 35.250632] memcg:ffff88800dee8201 [ 35.251087] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.251768] page_type: 0xffffffff() [ 35.252241] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.253219] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee8201 [ 35.254189] page dumped because: kasan: bad access detected [ 35.254898] [ 35.255131] Memory state around the buggy address: [ 35.255756] ffff88800f68df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 35.256690] ffff88800f68df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.257639] >ffff88800f68e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.258593] ^ [ 35.259389] ffff88800f68e080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.260332] ffff88800f68e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.261267] ================================================================== [ 35.262310] Disabling lock debugging due to kernel taint [ 38.015438] BUG: Bad rss-counter state mm:000000004a321c17 type:MM_FILEPAGES val:33 [ 38.016635] BUG: Bad rss-counter state mm:000000004a321c17 type:MM_ANONPAGES val:22 [ 38.415518] BUG: Bad rss-counter state mm:000000009cf7348e type:MM_FILEPAGES val:33 [ 38.416586] BUG: Bad rss-counter state mm:000000009cf7348e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39415' (ECDSA) to the list of known hosts. 2023/06/19 18:31:20 fuzzer started 2023/06/19 18:31:20 dialing manager at localhost:44161 2023/06/19 18:31:20 checking machine... 2023/06/19 18:31:20 checking revisions... [ 39.166949] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:31:20 testing simple program... [ 39.224263] cgroup: Unknown subsys name 'net' [ 39.276558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888006b6f848 RCX=0000000000000001 RDX=1ffff11000d6df14 RSI=ffff888006b6fc18 RDI=ffffffff818470dc RBP=ffff888006b6f8a0 RSP=ffff888006b6f830 R8 =0000000000000001 R9 =ffff888006b6f888 R10=0000000000038001 R11=0000000000020c48 R12=ffff888006b6f910 R13=0000000000000000 R14=ffff888016531b40 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f6ebcfe9900 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=00007f6ebd5a10b0 CR3=000000001a96a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10031d4cc9 RBX=ffffed10031d4cca RCX=ffffffff812e0423 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888018ea6648 RBP=ffffed10031d4cc9 RSP=ffff8880090df7d0 R8 =0000000000000000 R9 =ffffed10031d4cc9 R10=ffff888018ea664b R11=0000000000000001 R12=ffff88801666a000 R13=dffffc0000000000 R14=ffff88801666a058 R15=ffff888018ea6648 RIP=ffffffff8180eff3 RFL=00000283 [--S---C] 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=00007fae94242ba0 CR3=0000000008eda000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fb0b0e4f22a59cd300000000000ae988 XMM05=e475fb3ad745da300000000000135a48 XMM06=c291bd5c70af25b90000000000134838 XMM07=fb795ef6d65770560000000000124e48 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000