syzkaller login: [ 78.735921] BUG: Bad rss-counter state mm:00000000bde9a5a1 type:MM_FILEPAGES val:33 [ 78.737371] BUG: Bad rss-counter state mm:00000000bde9a5a1 type:MM_ANONPAGES val:22 [ 78.787331] ================================================================== [ 78.788729] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.790141] Read of size 8 at addr ffff888016bd9140 by task sshd/219 [ 78.791151] [ 78.791439] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 78.792817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.794111] Call Trace: [ 78.794530] [ 78.794897] dump_stack_lvl+0x91/0xf0 [ 78.795674] print_report+0xcc/0x620 [ 78.796319] ? __virt_addr_valid+0x102/0x340 [ 78.797060] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.797878] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.798681] kasan_report+0xbe/0xf0 [ 78.799306] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.800158] vma_interval_tree_remove+0xc75/0xec0 [ 78.800942] vma_prepare+0xc54/0x11a0 [ 78.801553] __split_vma+0x5af/0x950 [ 78.802181] ? __pfx___split_vma+0x10/0x10 [ 78.802861] ? find_held_lock+0x2c/0x110 [ 78.803546] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.804283] ? lock_is_held_type+0x9f/0x120 [ 78.804973] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.805752] ? mtree_range_walk+0x632/0x900 [ 78.806460] ? mas_walk+0x5c7/0x7c0 [ 78.807074] do_vmi_munmap+0x1f1/0x2b0 [ 78.807714] mmap_region+0x1f9/0x2660 [ 78.808339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.809011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.809943] ? __pfx_lock_acquire+0x10/0x10 [ 78.810626] ? __pfx_mmap_region+0x10/0x10 [ 78.811320] ? security_mmap_addr+0x7d/0xa0 [ 78.812042] ? get_unmapped_area+0x1f5/0x3f0 [ 78.812606] do_mmap+0x854/0xf00 [ 78.813055] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.813558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.814133] ksys_mmap_pgoff+0x3af/0x500 [ 78.814647] do_syscall_64+0x3f/0x90 [ 78.815134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.815786] RIP: 0033:0x7f28488add82 [ 78.816272] 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 [ 78.818405] RSP: 002b:00007ffe58daf7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.819311] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28488add82 [ 78.820173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2847ce7000 [ 78.821033] RBP: 00007f2847ce7000 R08: 0000000000000009 R09: 0000000000001000 [ 78.821885] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e385c9f70 [ 78.822763] R13: 00007ffe58daf800 R14: 00007ffe58daf830 R15: 00007ffe58dafb90 [ 78.823670] [ 78.823993] [ 78.824227] Allocated by task 212: [ 78.824687] kasan_save_stack+0x22/0x50 [ 78.825217] kasan_set_track+0x25/0x30 [ 78.825742] __kasan_slab_alloc+0x59/0x70 [ 78.826300] kmem_cache_alloc+0x16b/0x370 [ 78.826858] vm_area_dup+0x20/0x160 [ 78.827345] __split_vma+0x170/0x950 [ 78.827835] split_vma+0xc6/0x110 [ 78.828311] mprotect_fixup+0x8d2/0xb30 [ 78.828849] do_mprotect_pkey+0x87e/0xd40 [ 78.829405] __x64_sys_mprotect+0x78/0xc0 [ 78.829959] do_syscall_64+0x3f/0x90 [ 78.830460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.831132] [ 78.831358] Freed by task 212: [ 78.831775] kasan_save_stack+0x22/0x50 [ 78.832320] kasan_set_track+0x25/0x30 [ 78.832841] kasan_save_free_info+0x2b/0x50 [ 78.833400] __kasan_slab_free+0x10a/0x190 [ 78.833965] kmem_cache_free+0x10d/0x4d0 [ 78.834497] rcu_core+0x8c8/0x2860 [ 78.834976] __do_softirq+0x1b7/0x7d4 [ 78.835474] [ 78.835706] Last potentially related work creation: [ 78.836343] kasan_save_stack+0x22/0x50 [ 78.836871] __kasan_record_aux_stack+0x8e/0xa0 [ 78.837475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.838154] remove_vma+0x139/0x170 [ 78.838634] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.839224] do_vmi_munmap+0x1f1/0x2b0 [ 78.839739] __vm_munmap+0x138/0x3a0 [ 78.840244] __x64_sys_munmap+0x59/0x80 [ 78.840766] do_syscall_64+0x3f/0x90 [ 78.841263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.841932] [ 78.842167] The buggy address belongs to the object at ffff888016bd90e8 [ 78.842167] which belongs to the cache vm_area_struct of size 168 [ 78.843708] The buggy address is located 88 bytes inside of [ 78.843708] freed 168-byte region [ffff888016bd90e8, ffff888016bd9190) [ 78.845199] [ 78.845427] The buggy address belongs to the physical page: [ 78.846136] page:00000000276bb381 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bd9 [ 78.847290] memcg:ffff888019638701 [ 78.847741] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.848432] page_type: 0xffffffff() [ 78.848909] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 78.849889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019638701 [ 78.850840] page dumped because: kasan: bad access detected [ 78.851530] [ 78.851754] Memory state around the buggy address: [ 78.852368] ffff888016bd9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 78.853280] ffff888016bd9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 78.854176] >ffff888016bd9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.855067] ^ [ 78.855734] ffff888016bd9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 78.856645] ffff888016bd9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 78.857539] ================================================================== [ 78.859122] Disabling lock debugging due to kernel taint [ 81.063484] BUG: Bad rss-counter state mm:000000001a601974 type:MM_FILEPAGES val:33 [ 81.064430] BUG: Bad rss-counter state mm:000000001a601974 type:MM_ANONPAGES val:22 [ 81.650916] BUG: Bad rss-counter state mm:00000000f5881e1c type:MM_FILEPAGES val:33 [ 81.652259] BUG: Bad rss-counter state mm:00000000f5881e1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17186' (ECDSA) to the list of known hosts. 2023/06/20 00:35:26 fuzzer started 2023/06/20 00:35:27 dialing manager at localhost:44161 2023/06/20 00:35:27 checking machine... 2023/06/20 00:35:27 checking revisions... [ 82.303398] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:35:27 testing simple program... [ 82.344672] cgroup: Unknown subsys name 'net' [ 82.401014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86137736 RDX=1ffff11001b10eeb RSI=1ffff11001b10eea RDI=1ffff11001b10eea RBP=ffff88800d887750 RSP=ffff88800d887688 R8 =ffffffff8613773a R9 =ffff88800d887738 R10=0000000000038001 R11=0000000000020de7 R12=ffff88800d887758 R13=ffff88800d887740 R14=ffff88800d887a80 R15=ffff88800d8876f8 RIP=ffffffff811310ce 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 00007fa0a6050900 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=0000560b2d1af218 CR3=000000000c556000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e771e75a05dc69b400000000000ae988 XMM05=a66d9114f08cd0bb000000000013ad68 XMM06=e215d17578275d3f0000000000139aa0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000045 RCX=ffffffff8372651a RDX=ffff888016c43680 RSI=0000000000000045 RDI=000000000000000a RBP=0000000000000046 RSP=ffff88800f0af7b8 R8 =0000000000000005 R9 =0000000000000082 R10=0000000000000045 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96d08 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c02c8 RFL=00000293 [--S-A-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 00007ff36f50c900 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=00007ff36fac3618 CR3=000000001999a000 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