syzkaller login: [ 30.777572] BUG: Bad rss-counter state mm:00000000e0cdf2df type:MM_FILEPAGES val:33 [ 30.778761] BUG: Bad rss-counter state mm:00000000e0cdf2df type:MM_ANONPAGES val:22 [ 30.818426] ================================================================== [ 30.819533] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.820762] Read of size 8 at addr ffff888019cdfd08 by task sshd/222 [ 30.821659] [ 30.821903] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.822967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.824172] Call Trace: [ 30.824539] [ 30.824905] dump_stack_lvl+0x91/0xf0 [ 30.825519] print_report+0xcc/0x620 [ 30.826100] ? __virt_addr_valid+0x102/0x340 [ 30.826771] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827525] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828186] kasan_report+0xbe/0xf0 [ 30.828757] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829531] vma_interval_tree_remove+0xc75/0xec0 [ 30.830183] vma_prepare+0xc54/0x11a0 [ 30.830699] __split_vma+0x5af/0x950 [ 30.831204] ? __pfx___split_vma+0x10/0x10 [ 30.831782] ? find_held_lock+0x2c/0x110 [ 30.832337] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.832937] ? lock_is_held_type+0x9f/0x120 [ 30.833512] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.834156] ? mtree_range_walk+0x632/0x900 [ 30.834738] ? mas_walk+0x5c7/0x7c0 [ 30.835243] do_vmi_munmap+0x1f1/0x2b0 [ 30.835775] mmap_region+0x1f9/0x2660 [ 30.836288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.836831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.837605] ? __pfx_lock_acquire+0x10/0x10 [ 30.838166] ? __pfx_mmap_region+0x10/0x10 [ 30.838734] ? security_mmap_addr+0x7d/0xa0 [ 30.839309] ? get_unmapped_area+0x1f5/0x3f0 [ 30.839889] do_mmap+0x854/0xf00 [ 30.840361] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.840888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.841491] ksys_mmap_pgoff+0x3af/0x500 [ 30.842030] do_syscall_64+0x3f/0x90 [ 30.842545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843236] RIP: 0033:0x7f9ffb29ad82 [ 30.843728] 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 [ 30.846029] RSP: 002b:00007ffe2ef399a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.847001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ffb29ad82 [ 30.847925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ffa6d4000 [ 30.848855] RBP: 00007f9ffa6d4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.849769] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624d01b0ec0 [ 30.850682] R13: 00007ffe2ef399c0 R14: 00007ffe2ef399f0 R15: 00007ffe2ef39d50 [ 30.851618] [ 30.851929] [ 30.852157] Allocated by task 215: [ 30.852623] kasan_save_stack+0x22/0x50 [ 30.853155] kasan_set_track+0x25/0x30 [ 30.853675] __kasan_slab_alloc+0x59/0x70 [ 30.854229] kmem_cache_alloc+0x16b/0x370 [ 30.854778] vm_area_dup+0x20/0x160 [ 30.855270] __split_vma+0x170/0x950 [ 30.855775] split_vma+0xc6/0x110 [ 30.856242] mprotect_fixup+0x8d2/0xb30 [ 30.856775] do_mprotect_pkey+0x87e/0xd40 [ 30.857321] __x64_sys_mprotect+0x78/0xc0 [ 30.857874] do_syscall_64+0x3f/0x90 [ 30.858380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859066] [ 30.859307] Freed by task 215: [ 30.859720] kasan_save_stack+0x22/0x50 [ 30.860252] kasan_set_track+0x25/0x30 [ 30.860780] kasan_save_free_info+0x2b/0x50 [ 30.861362] __kasan_slab_free+0x10a/0x190 [ 30.861924] kmem_cache_free+0x10d/0x4d0 [ 30.862459] rcu_core+0x8c8/0x2860 [ 30.862938] __do_softirq+0x1b7/0x7d4 [ 30.863457] [ 30.863684] Last potentially related work creation: [ 30.864353] kasan_save_stack+0x22/0x50 [ 30.864894] __kasan_record_aux_stack+0x8e/0xa0 [ 30.865511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.866199] remove_vma+0x139/0x170 [ 30.866682] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.867300] do_vmi_munmap+0x1f1/0x2b0 [ 30.867825] __vm_munmap+0x138/0x3a0 [ 30.868322] __x64_sys_munmap+0x59/0x80 [ 30.868855] do_syscall_64+0x3f/0x90 [ 30.869361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870049] [ 30.870277] Second to last potentially related work creation: [ 30.871008] kasan_save_stack+0x22/0x50 [ 30.871554] __kasan_record_aux_stack+0x8e/0xa0 [ 30.872165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.872857] remove_vma+0x139/0x170 [ 30.873334] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.873926] do_vmi_munmap+0x1f1/0x2b0 [ 30.874445] mmap_region+0x1f9/0x2660 [ 30.874955] do_mmap+0x854/0xf00 [ 30.875432] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875949] ksys_mmap_pgoff+0x3af/0x500 [ 30.876482] do_syscall_64+0x3f/0x90 [ 30.876990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877672] [ 30.877903] The buggy address belongs to the object at ffff888019cdfcb0 [ 30.877903] which belongs to the cache vm_area_struct of size 168 [ 30.879481] The buggy address is located 88 bytes inside of [ 30.879481] freed 168-byte region [ffff888019cdfcb0, ffff888019cdfd58) [ 30.880970] [ 30.881202] The buggy address belongs to the physical page: [ 30.881903] page:00000000678b1d72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cdf [ 30.883073] memcg:ffff888016944801 [ 30.883534] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.884225] page_type: 0xffffffff() [ 30.884712] raw: 0100000000000200 ffff8880087a0c80 ffffea00003735c0 0000000000000004 [ 30.885691] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016944801 [ 30.886649] page dumped because: kasan: bad access detected [ 30.887372] [ 30.887600] Memory state around the buggy address: [ 30.888218] ffff888019cdfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.889138] ffff888019cdfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.890057] >ffff888019cdfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.890965] ^ [ 30.891445] ffff888019cdfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.892355] ffff888019cdfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.893267] ================================================================== [ 30.894389] Disabling lock debugging due to kernel taint [ 32.978431] BUG: Bad rss-counter state mm:000000004b233c96 type:MM_FILEPAGES val:33 [ 32.979558] BUG: Bad rss-counter state mm:000000004b233c96 type:MM_ANONPAGES val:22 [ 33.493746] BUG: Bad rss-counter state mm:0000000024e8c1cb type:MM_FILEPAGES val:33 [ 33.494939] BUG: Bad rss-counter state mm:0000000024e8c1cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44307' (ECDSA) to the list of known hosts. 2023/06/20 14:21:23 fuzzer started 2023/06/20 14:21:23 dialing manager at localhost:36067 2023/06/20 14:21:23 checking machine... 2023/06/20 14:21:23 checking revisions... [ 34.267998] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:21:24 testing simple program... [ 34.315892] cgroup: Unknown subsys name 'net' [ 34.369458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:21:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f435cbb2700 RCX=ffffffff8107f98e RDX=1ffff11001895cf5 RSI=0000000000000008 RDI=ffff88800c4ae7a8 RBP=ffff88800c4a9b40 RSP=ffff88801a01fa08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800c4ad1c0 R13=0000000000000000 R14=ffff88800c4ae780 R15=ffff88800c4ae840 RIP=ffffffff8450ce7a RFL=00000046 [---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 00007f435cbb2700 00000000 00000000 GS =0000 0000000000000000 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=00007f0ac150f650 CR3=000000000f5f6000 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=31323a3431203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732033323a3132 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f9b8c783ba0 CR3=000000000c6ee000 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=556bd8083c22c7ac7d4df08f5ad43c85 XMM02=000000000011ecd0eff9b2d0a8fce9cb XMM03=000000000011eda02c67c8bc2e329bc3 XMM04=6a806a144cc3295300000000000ae988 XMM05=8bfa0de1177294170000000000134490 XMM06=00c3ffa147b8d8570000000000133530 XMM07=e042d86d42eb936e00000000001227b8 XMM08=d47d5eb758b0c092000000000011eda0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000