syzkaller login: [ 30.607017] BUG: Bad rss-counter state mm:000000000a8c9d4c type:MM_FILEPAGES val:33 [ 30.608731] BUG: Bad rss-counter state mm:000000000a8c9d4c type:MM_ANONPAGES val:22 [ 30.804431] ================================================================== [ 30.805454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.806716] Read of size 8 at addr ffff88800e8985c8 by task sshd/219 [ 30.807583] [ 30.807844] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.808830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.809925] Call Trace: [ 30.810290] [ 30.810611] dump_stack_lvl+0x91/0xf0 [ 30.811203] print_report+0xcc/0x620 [ 30.811770] ? __virt_addr_valid+0x102/0x340 [ 30.812396] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813112] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813821] kasan_report+0xbe/0xf0 [ 30.814360] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815089] vma_interval_tree_remove+0xc75/0xec0 [ 30.815771] vma_prepare+0xc54/0x11a0 [ 30.816299] __split_vma+0x5af/0x950 [ 30.816838] ? __pfx___split_vma+0x10/0x10 [ 30.817426] ? find_held_lock+0x2c/0x110 [ 30.818018] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.818688] ? lock_is_held_type+0x9f/0x120 [ 30.819310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.820001] ? mtree_range_walk+0x632/0x900 [ 30.820623] ? mas_walk+0x5c7/0x7c0 [ 30.821179] do_vmi_munmap+0x1f1/0x2b0 [ 30.821738] mmap_region+0x1f9/0x2660 [ 30.822286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.822881] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.823690] ? __pfx_lock_acquire+0x10/0x10 [ 30.824290] ? __pfx_mmap_region+0x10/0x10 [ 30.824891] ? security_mmap_addr+0x7d/0xa0 [ 30.825478] ? get_unmapped_area+0x1f5/0x3f0 [ 30.826133] do_mmap+0x854/0xf00 [ 30.826629] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.827216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.827862] ksys_mmap_pgoff+0x3af/0x500 [ 30.828432] do_syscall_64+0x3f/0x90 [ 30.828982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829725] RIP: 0033:0x7fb8581dad82 [ 30.830246] 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 [ 30.832663] RSP: 002b:00007ffcbbef0b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.833697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8581dad82 [ 30.834683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb857614000 [ 30.835648] RBP: 00007fb857614000 R08: 0000000000000009 R09: 0000000000001000 [ 30.836616] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604d6c54ec0 [ 30.837578] R13: 00007ffcbbef0b30 R14: 00007ffcbbef0b60 R15: 00007ffcbbef0ec0 [ 30.838575] [ 30.838932] [ 30.839175] Allocated by task 212: [ 30.839660] kasan_save_stack+0x22/0x50 [ 30.840243] kasan_set_track+0x25/0x30 [ 30.840803] __kasan_slab_alloc+0x59/0x70 [ 30.841390] kmem_cache_alloc+0x16b/0x370 [ 30.841983] vm_area_dup+0x20/0x160 [ 30.842498] __split_vma+0x170/0x950 [ 30.843051] split_vma+0xc6/0x110 [ 30.843538] mprotect_fixup+0x8d2/0xb30 [ 30.844123] do_mprotect_pkey+0x87e/0xd40 [ 30.844739] __x64_sys_mprotect+0x78/0xc0 [ 30.845343] do_syscall_64+0x3f/0x90 [ 30.845895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846637] [ 30.846905] Freed by task 212: [ 30.847347] kasan_save_stack+0x22/0x50 [ 30.847943] kasan_set_track+0x25/0x30 [ 30.848509] kasan_save_free_info+0x2b/0x50 [ 30.849121] __kasan_slab_free+0x10a/0x190 [ 30.849735] kmem_cache_free+0x10d/0x4d0 [ 30.850317] rcu_core+0x8c8/0x2860 [ 30.850852] __do_softirq+0x1b7/0x7d4 [ 30.851390] [ 30.851633] Last potentially related work creation: [ 30.852304] kasan_save_stack+0x22/0x50 [ 30.852877] __kasan_record_aux_stack+0x8e/0xa0 [ 30.853517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.854277] remove_vma+0x139/0x170 [ 30.854811] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.855432] do_vmi_munmap+0x1f1/0x2b0 [ 30.855985] __vm_munmap+0x138/0x3a0 [ 30.856506] __x64_sys_munmap+0x59/0x80 [ 30.857075] do_syscall_64+0x3f/0x90 [ 30.857612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858379] [ 30.858621] The buggy address belongs to the object at ffff88800e898570 [ 30.858621] which belongs to the cache vm_area_struct of size 168 [ 30.860320] The buggy address is located 88 bytes inside of [ 30.860320] freed 168-byte region [ffff88800e898570, ffff88800e898618) [ 30.861934] [ 30.862195] The buggy address belongs to the physical page: [ 30.862965] page:00000000a16f36a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe898 [ 30.864207] memcg:ffff888016617e01 [ 30.864709] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.865440] page_type: 0xffffffff() [ 30.865976] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.867069] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016617e01 [ 30.868123] page dumped because: kasan: bad access detected [ 30.868889] [ 30.869134] Memory state around the buggy address: [ 30.869815] ffff88800e898480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.870828] ffff88800e898500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.871823] >ffff88800e898580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.872810] ^ [ 30.873568] ffff88800e898600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.874584] ffff88800e898680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.875563] ================================================================== [ 30.876765] Disabling lock debugging due to kernel taint [ 32.975893] BUG: Bad rss-counter state mm:00000000e959e1f8 type:MM_FILEPAGES val:33 [ 32.976893] BUG: Bad rss-counter state mm:00000000e959e1f8 type:MM_ANONPAGES val:22 [ 33.413253] BUG: Bad rss-counter state mm:0000000099367076 type:MM_FILEPAGES val:33 [ 33.414260] BUG: Bad rss-counter state mm:0000000099367076 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24070' (ECDSA) to the list of known hosts. 2023/06/20 12:51:40 fuzzer started 2023/06/20 12:51:41 dialing manager at localhost:36067 2023/06/20 12:51:41 checking machine... 2023/06/20 12:51:41 checking revisions... [ 34.132785] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:51:41 testing simple program... [ 34.179071] cgroup: Unknown subsys name 'net' [ 34.231732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800d62f520 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1fc0 R15=0000000000000000 RIP=ffffffff8135b980 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 00007fdfd84fd900 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=00007fdfd792cd70 CR3=0000000013a96000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e57f35ba0ba019ee00000000000ae988 XMM05=c2cab0f7f93975a00000000000132cc0 XMM06=4fda316b135da52b0000000000131ab0 XMM07=fb795ef6d65770560000000000121d50 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c13012 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86098094 RBP=ffff88800fde77b0 RSP=ffff88800fde7698 R8 =ffffffff86098096 R9 =ffff88800fde7798 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fde77b8 R13=ffff88800fde77a0 R14=ffff88800fde7758 R15=ffff88800fde7758 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f7de1f2d900 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=00007fff4b122000 CR3=000000000d59c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000