syzkaller login: [ 31.024427] BUG: Bad rss-counter state mm:0000000001455ce9 type:MM_FILEPAGES val:33 [ 31.025707] BUG: Bad rss-counter state mm:0000000001455ce9 type:MM_ANONPAGES val:22 [ 31.200770] ================================================================== [ 31.201714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.202714] Read of size 8 at addr ffff88800ed0dd08 by task sshd/220 [ 31.203514] [ 31.203809] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.204713] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.205734] Call Trace: [ 31.206086] [ 31.206379] dump_stack_lvl+0x91/0xf0 [ 31.206897] print_report+0xcc/0x620 [ 31.207393] ? __virt_addr_valid+0x102/0x340 [ 31.207952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208591] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209210] kasan_report+0xbe/0xf0 [ 31.209701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210336] vma_interval_tree_remove+0xc75/0xec0 [ 31.210959] vma_prepare+0xc54/0x11a0 [ 31.211439] __split_vma+0x5af/0x950 [ 31.211916] ? __pfx___split_vma+0x10/0x10 [ 31.212447] ? find_held_lock+0x2c/0x110 [ 31.212978] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.213543] ? lock_is_held_type+0x9f/0x120 [ 31.214105] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.214723] ? mtree_range_walk+0x632/0x900 [ 31.215271] ? mas_walk+0x5c7/0x7c0 [ 31.215752] do_vmi_munmap+0x1f1/0x2b0 [ 31.216249] mmap_region+0x1f9/0x2660 [ 31.216727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.217243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.217981] ? __pfx_lock_acquire+0x10/0x10 [ 31.218521] ? __pfx_mmap_region+0x10/0x10 [ 31.219065] ? security_mmap_addr+0x7d/0xa0 [ 31.219605] ? get_unmapped_area+0x1f5/0x3f0 [ 31.220161] do_mmap+0x854/0xf00 [ 31.220606] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.221108] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.221679] ksys_mmap_pgoff+0x3af/0x500 [ 31.222209] do_syscall_64+0x3f/0x90 [ 31.222700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223360] RIP: 0033:0x7f4c05909d82 [ 31.223819] 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 [ 31.225963] RSP: 002b:00007ffce7b26df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.226884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c05909d82 [ 31.227734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c04d43000 [ 31.228582] RBP: 00007f4c04d43000 R08: 0000000000000009 R09: 0000000000001000 [ 31.229443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a76a40cec0 [ 31.230291] R13: 00007ffce7b26e10 R14: 00007ffce7b26e40 R15: 00007ffce7b271a0 [ 31.231154] [ 31.231452] [ 31.231670] Allocated by task 213: [ 31.232101] kasan_save_stack+0x22/0x50 [ 31.232612] kasan_set_track+0x25/0x30 [ 31.233108] __kasan_slab_alloc+0x59/0x70 [ 31.233638] kmem_cache_alloc+0x16b/0x370 [ 31.234179] vm_area_dup+0x20/0x160 [ 31.234633] __split_vma+0x170/0x950 [ 31.235103] split_vma+0xc6/0x110 [ 31.235545] mprotect_fixup+0x8d2/0xb30 [ 31.236049] do_mprotect_pkey+0x87e/0xd40 [ 31.236572] __x64_sys_mprotect+0x78/0xc0 [ 31.237090] do_syscall_64+0x3f/0x90 [ 31.237567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238226] [ 31.238439] Freed by task 213: [ 31.238834] kasan_save_stack+0x22/0x50 [ 31.239344] kasan_set_track+0x25/0x30 [ 31.239839] kasan_save_free_info+0x2b/0x50 [ 31.240376] __kasan_slab_free+0x10a/0x190 [ 31.240925] kmem_cache_free+0x10d/0x4d0 [ 31.241436] rcu_core+0x8c8/0x2860 [ 31.241882] __do_softirq+0x1b7/0x7d4 [ 31.242365] [ 31.242578] Last potentially related work creation: [ 31.243178] kasan_save_stack+0x22/0x50 [ 31.243683] __kasan_record_aux_stack+0x8e/0xa0 [ 31.244251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.244894] remove_vma+0x139/0x170 [ 31.245346] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.245919] do_vmi_munmap+0x1f1/0x2b0 [ 31.246419] __vm_munmap+0x138/0x3a0 [ 31.246891] __x64_sys_munmap+0x59/0x80 [ 31.247396] do_syscall_64+0x3f/0x90 [ 31.247872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248529] [ 31.248747] The buggy address belongs to the object at ffff88800ed0dcb0 [ 31.248747] which belongs to the cache vm_area_struct of size 168 [ 31.250217] The buggy address is located 88 bytes inside of [ 31.250217] freed 168-byte region [ffff88800ed0dcb0, ffff88800ed0dd58) [ 31.251646] [ 31.251866] The buggy address belongs to the physical page: [ 31.252530] page:000000001cbc9069 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed0d [ 31.253619] memcg:ffff88800ee1a701 [ 31.254067] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.254709] page_type: 0xffffffff() [ 31.255169] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.256105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1a701 [ 31.257028] page dumped because: kasan: bad access detected [ 31.257684] [ 31.257906] Memory state around the buggy address: [ 31.258492] ffff88800ed0dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.259348] ffff88800ed0dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.260209] >ffff88800ed0dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.261069] ^ [ 31.261531] ffff88800ed0dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.262425] ffff88800ed0de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.263273] ================================================================== [ 31.264235] Disabling lock debugging due to kernel taint [ 33.293023] BUG: Bad rss-counter state mm:00000000e2b3805a type:MM_FILEPAGES val:33 [ 33.293762] BUG: Bad rss-counter state mm:00000000e2b3805a type:MM_ANONPAGES val:22 [ 33.726091] BUG: Bad rss-counter state mm:000000004e7a3236 type:MM_FILEPAGES val:33 [ 33.726874] BUG: Bad rss-counter state mm:000000004e7a3236 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46765' (ECDSA) to the list of known hosts. 2023/06/21 02:19:05 fuzzer started 2023/06/21 02:19:05 dialing manager at localhost:36067 2023/06/21 02:19:05 checking machine... 2023/06/21 02:19:05 checking revisions... [ 34.376661] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:19:05 testing simple program... [ 34.425434] cgroup: Unknown subsys name 'net' [ 34.462808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:19:05 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888019981a10 RCX=0000000000000009 RDX=0000000000002800 RSI=0000000000000000 RDI=ffff8880084c6140 RBP=ffff8880084c6140 RSP=ffff88801cac73a8 R8 =ffff888019981a10 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000009 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff81803ee3 RFL=00000286 [--S--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 00007f7786d95900 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=00007f7786d74020 CR3=0000000019b7e000 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=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 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=00007f9dc8d3f4e0 CR3=000000000cad4000 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=2035303a39313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39313a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000