syzkaller login: [ 31.031174] BUG: Bad rss-counter state mm:00000000aaae4266 type:MM_FILEPAGES val:33 [ 31.032537] BUG: Bad rss-counter state mm:00000000aaae4266 type:MM_ANONPAGES val:22 [ 31.190682] ================================================================== [ 31.191818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.193059] Read of size 8 at addr ffff888016b6ced8 by task sshd/218 [ 31.193897] [ 31.194123] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.195047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.196072] Call Trace: [ 31.196418] [ 31.196715] dump_stack_lvl+0x91/0xf0 [ 31.197241] print_report+0xcc/0x620 [ 31.197759] ? __virt_addr_valid+0x102/0x340 [ 31.198340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.199018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.199685] kasan_report+0xbe/0xf0 [ 31.200180] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200836] vma_interval_tree_remove+0xc75/0xec0 [ 31.201520] vma_prepare+0xc54/0x11a0 [ 31.202031] __split_vma+0x5af/0x950 [ 31.202537] ? __pfx___split_vma+0x10/0x10 [ 31.203103] ? find_held_lock+0x2c/0x110 [ 31.203671] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.204265] ? lock_is_held_type+0x9f/0x120 [ 31.204844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.205506] ? mtree_range_walk+0x632/0x900 [ 31.206085] ? mas_walk+0x5c7/0x7c0 [ 31.206602] do_vmi_munmap+0x1f1/0x2b0 [ 31.207118] mmap_region+0x1f9/0x2660 [ 31.207666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.208214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.209012] ? __pfx_lock_acquire+0x10/0x10 [ 31.209758] ? __pfx_mmap_region+0x10/0x10 [ 31.210489] ? security_mmap_addr+0x7d/0xa0 [ 31.211193] ? get_unmapped_area+0x1f5/0x3f0 [ 31.211925] do_mmap+0x854/0xf00 [ 31.212500] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213894] ksys_mmap_pgoff+0x3af/0x500 [ 31.214578] do_syscall_64+0x3f/0x90 [ 31.215216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216093] RIP: 0033:0x7fb0a1de9d82 [ 31.216709] 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 [ 31.219168] RSP: 002b:00007ffdb22723f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.220147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0a1de9d82 [ 31.221045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0a1223000 [ 31.221960] RBP: 00007fb0a1223000 R08: 0000000000000009 R09: 0000000000001000 [ 31.222866] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558594ee3ec0 [ 31.223758] R13: 00007ffdb2272410 R14: 00007ffdb2272440 R15: 00007ffdb22727a0 [ 31.224672] [ 31.224980] [ 31.225229] Allocated by task 211: [ 31.225699] kasan_save_stack+0x22/0x50 [ 31.226233] kasan_set_track+0x25/0x30 [ 31.226780] __kasan_slab_alloc+0x59/0x70 [ 31.227345] kmem_cache_alloc+0x16b/0x370 [ 31.227902] vm_area_dup+0x20/0x160 [ 31.228382] __split_vma+0x170/0x950 [ 31.228883] split_vma+0xc6/0x110 [ 31.229361] mprotect_fixup+0x8d2/0xb30 [ 31.229898] do_mprotect_pkey+0x87e/0xd40 [ 31.230472] __x64_sys_mprotect+0x78/0xc0 [ 31.231031] do_syscall_64+0x3f/0x90 [ 31.231534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232214] [ 31.232467] Freed by task 211: [ 31.232881] kasan_save_stack+0x22/0x50 [ 31.233434] kasan_set_track+0x25/0x30 [ 31.233951] kasan_save_free_info+0x2b/0x50 [ 31.234525] __kasan_slab_free+0x10a/0x190 [ 31.235077] kmem_cache_free+0x10d/0x4d0 [ 31.235650] rcu_core+0x8c8/0x2860 [ 31.236116] __do_softirq+0x1b7/0x7d4 [ 31.236641] [ 31.236867] Last potentially related work creation: [ 31.237520] kasan_save_stack+0x22/0x50 [ 31.238047] __kasan_record_aux_stack+0x8e/0xa0 [ 31.238653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.239324] remove_vma+0x139/0x170 [ 31.239826] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.240425] do_vmi_munmap+0x1f1/0x2b0 [ 31.240941] __vm_munmap+0x138/0x3a0 [ 31.241456] __x64_sys_munmap+0x59/0x80 [ 31.241979] do_syscall_64+0x3f/0x90 [ 31.242483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243167] [ 31.243400] The buggy address belongs to the object at ffff888016b6ce80 [ 31.243400] which belongs to the cache vm_area_struct of size 168 [ 31.244970] The buggy address is located 88 bytes inside of [ 31.244970] freed 168-byte region [ffff888016b6ce80, ffff888016b6cf28) [ 31.246490] [ 31.246720] The buggy address belongs to the physical page: [ 31.247409] page:000000002fccb985 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b6c [ 31.248587] memcg:ffff88800f1e3701 [ 31.249040] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.249802] page_type: 0xffffffff() [ 31.250274] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ce00 dead000000000005 [ 31.251242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1e3701 [ 31.252197] page dumped because: kasan: bad access detected [ 31.252918] [ 31.253141] Memory state around the buggy address: [ 31.253794] ffff888016b6cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.254699] ffff888016b6ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.255611] >ffff888016b6ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.256506] ^ [ 31.257280] ffff888016b6cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.258215] ffff888016b6cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.259124] ================================================================== [ 31.260218] Disabling lock debugging due to kernel taint [ 33.766079] BUG: Bad rss-counter state mm:00000000b7623e61 type:MM_FILEPAGES val:33 [ 33.767167] BUG: Bad rss-counter state mm:00000000b7623e61 type:MM_ANONPAGES val:22 [ 34.263888] BUG: Bad rss-counter state mm:00000000bfec7729 type:MM_FILEPAGES val:33 [ 34.264884] BUG: Bad rss-counter state mm:00000000bfec7729 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54674' (ECDSA) to the list of known hosts. 2023/06/20 12:36:37 fuzzer started 2023/06/20 12:36:38 dialing manager at localhost:36067 2023/06/20 12:36:38 checking machine... 2023/06/20 12:36:38 checking revisions... [ 34.973924] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:36:38 testing simple program... [ 35.027272] cgroup: Unknown subsys name 'net' [ 35.066010] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:36:37 Registers: info registers vcpu 0 RAX=ffffffff81809add RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff81809add RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e022d90 RIP=ffffffff810bd06d 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 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=00007ffc3488fcc8 CR3=0000000013a98000 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=2037333a36333a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11003068e85 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888018347418 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000aa400000aa4 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f18 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 00007f5786603900 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=00007f5786bba618 CR3=0000000008edc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000