syzkaller login: [ 30.999411] BUG: Bad rss-counter state mm:000000000d2035bb type:MM_FILEPAGES val:33 [ 31.001623] BUG: Bad rss-counter state mm:000000000d2035bb type:MM_ANONPAGES val:22 [ 31.154132] ================================================================== [ 31.154834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.156498] Read of size 8 at addr ffff8880164833f8 by task sshd/220 [ 31.158019] [ 31.158415] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.160134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.162108] Call Trace: [ 31.162718] [ 31.163287] dump_stack_lvl+0x91/0xf0 [ 31.164207] print_report+0xcc/0x620 [ 31.165107] ? __virt_addr_valid+0x102/0x340 [ 31.166141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167332] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168505] kasan_report+0xbe/0xf0 [ 31.169380] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170560] vma_interval_tree_remove+0xc75/0xec0 [ 31.171734] vma_prepare+0xc54/0x11a0 [ 31.172636] __split_vma+0x5af/0x950 [ 31.173521] ? __pfx___split_vma+0x10/0x10 [ 31.174535] ? find_held_lock+0x2c/0x110 [ 31.175535] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.176600] ? lock_is_held_type+0x9f/0x120 [ 31.177611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.178787] ? mtree_range_walk+0x632/0x900 [ 31.179848] ? mas_walk+0x5c7/0x7c0 [ 31.180735] do_vmi_munmap+0x1f1/0x2b0 [ 31.181657] mmap_region+0x1f9/0x2660 [ 31.182571] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.183732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.185151] ? __pfx_lock_acquire+0x10/0x10 [ 31.186139] ? __pfx_mmap_region+0x10/0x10 [ 31.187120] ? security_mmap_addr+0x7d/0xa0 [ 31.188127] ? get_unmapped_area+0x1f5/0x3f0 [ 31.189141] do_mmap+0x854/0xf00 [ 31.189919] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.190820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.191852] ksys_mmap_pgoff+0x3af/0x500 [ 31.192782] do_syscall_64+0x3f/0x90 [ 31.193645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.194850] RIP: 0033:0x7f8608ebed82 [ 31.195742] 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 [ 31.200133] RSP: 002b:00007ffe74768a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.201894] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8608ebed82 [ 31.203562] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86082f8000 [ 31.205257] RBP: 00007f86082f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.206984] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7d176aec0 [ 31.208715] R13: 00007ffe74768a30 R14: 00007ffe74768a60 R15: 00007ffe74768dc0 [ 31.210448] [ 31.211000] [ 31.211407] Allocated by task 213: [ 31.212241] kasan_save_stack+0x22/0x50 [ 31.213188] kasan_set_track+0x25/0x30 [ 31.214113] __kasan_slab_alloc+0x59/0x70 [ 31.215109] kmem_cache_alloc+0x16b/0x370 [ 31.216104] vm_area_dup+0x20/0x160 [ 31.216985] __split_vma+0x170/0x950 [ 31.217855] split_vma+0xc6/0x110 [ 31.218670] mprotect_fixup+0x8d2/0xb30 [ 31.219647] do_mprotect_pkey+0x87e/0xd40 [ 31.220658] __x64_sys_mprotect+0x78/0xc0 [ 31.221672] do_syscall_64+0x3f/0x90 [ 31.222579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223871] [ 31.224260] Freed by task 213: [ 31.225032] kasan_save_stack+0x22/0x50 [ 31.226005] kasan_set_track+0x25/0x30 [ 31.226918] kasan_save_free_info+0x2b/0x50 [ 31.227308] __kasan_slab_free+0x10a/0x190 [ 31.227665] kmem_cache_free+0x10d/0x4d0 [ 31.228008] rcu_core+0x8c8/0x2860 [ 31.228313] __do_softirq+0x1b7/0x7d4 [ 31.228640] [ 31.228788] Last potentially related work creation: [ 31.229196] kasan_save_stack+0x22/0x50 [ 31.229540] __kasan_record_aux_stack+0x8e/0xa0 [ 31.229930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230363] remove_vma+0x139/0x170 [ 31.230672] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231055] do_vmi_munmap+0x1f1/0x2b0 [ 31.231404] __vm_munmap+0x138/0x3a0 [ 31.231717] __x64_sys_munmap+0x59/0x80 [ 31.232062] do_syscall_64+0x3f/0x90 [ 31.232387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232824] [ 31.232971] The buggy address belongs to the object at ffff8880164833a0 [ 31.232971] which belongs to the cache vm_area_struct of size 168 [ 31.233951] The buggy address is located 88 bytes inside of [ 31.233951] freed 168-byte region [ffff8880164833a0, ffff888016483448) [ 31.234898] [ 31.235044] The buggy address belongs to the physical page: [ 31.235493] page:000000007b36dd28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16483 [ 31.236209] memcg:ffff88800f21fe01 [ 31.236489] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.236919] page_type: 0xffffffff() [ 31.237219] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.237848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f21fe01 [ 31.238457] page dumped because: kasan: bad access detected [ 31.238904] [ 31.239050] Memory state around the buggy address: [ 31.239461] ffff888016483280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.240029] ffff888016483300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.240592] >ffff888016483380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.241161] ^ [ 31.241724] ffff888016483400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.242293] ffff888016483480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.242860] ================================================================== [ 31.243860] Disabling lock debugging due to kernel taint [ 33.778711] BUG: Bad rss-counter state mm:0000000039cbac3d type:MM_FILEPAGES val:33 [ 33.779493] BUG: Bad rss-counter state mm:0000000039cbac3d type:MM_ANONPAGES val:22 [ 34.242031] BUG: Bad rss-counter state mm:00000000d73f30b8 type:MM_FILEPAGES val:33 [ 34.242741] BUG: Bad rss-counter state mm:00000000d73f30b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30514' (ECDSA) to the list of known hosts. 2023/06/21 00:11:55 fuzzer started 2023/06/21 00:11:55 dialing manager at localhost:36067 2023/06/21 00:11:55 checking machine... 2023/06/21 00:11:55 checking revisions... [ 34.911184] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:11:56 testing simple program... [ 34.944861] cgroup: Unknown subsys name 'net' [ 34.996091] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:11:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fcd2816e9d0 CR3=000000000d7d2000 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=646390ce9f2af78991465e639d3cc613 XMM02=0000000000119f80eff9b2d0a8fce9cb XMM03=000000000011a0502c67c8bc2e329bc3 XMM04=8d2de5e35220607e00000000000ae988 XMM05=59d5b690e0af863b0000000000131788 XMM06=00c3ffa147b8d8570000000000131610 XMM07=e042d86d42eb936e0000000000121b18 XMM08=0ad300f68fe3ea91000000000011a050 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9e1353 RSI=ffffffff8180c705 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a70 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016a7d1c0 R15=ffff88806cf09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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=00007f9982f95328 CR3=0000000005482000 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=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