syzkaller login: [ 25.810402] BUG: Bad rss-counter state mm:00000000bceb3430 type:MM_FILEPAGES val:33 [ 25.811567] BUG: Bad rss-counter state mm:00000000bceb3430 type:MM_ANONPAGES val:22 [ 25.958603] ================================================================== [ 25.959621] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.960615] Read of size 8 at addr ffff88800e5303f8 by task sshd/219 [ 25.961667] [ 25.962028] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.963003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.964136] Call Trace: [ 25.964537] [ 25.964877] dump_stack_lvl+0x91/0xf0 [ 25.965482] print_report+0xcc/0x620 [ 25.966095] ? __virt_addr_valid+0x102/0x340 [ 25.966726] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.967385] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.968013] kasan_report+0xbe/0xf0 [ 25.968507] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.969150] vma_interval_tree_remove+0xc75/0xec0 [ 25.969777] vma_prepare+0xc54/0x11a0 [ 25.970302] __split_vma+0x5af/0x950 [ 25.970780] ? __pfx___split_vma+0x10/0x10 [ 25.971328] ? find_held_lock+0x2c/0x110 [ 25.971852] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.972440] ? lock_is_held_type+0x9f/0x120 [ 25.972992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.973614] ? mtree_range_walk+0x632/0x900 [ 25.974198] ? mas_walk+0x5c7/0x7c0 [ 25.974687] do_vmi_munmap+0x1f1/0x2b0 [ 25.975185] mmap_region+0x1f9/0x2660 [ 25.975683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.976203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.976912] ? __pfx_lock_acquire+0x10/0x10 [ 25.977542] ? __pfx_mmap_region+0x10/0x10 [ 25.978197] ? security_mmap_addr+0x7d/0xa0 [ 25.978784] ? get_unmapped_area+0x1f5/0x3f0 [ 25.979336] do_mmap+0x854/0xf00 [ 25.979798] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.980348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.980999] ksys_mmap_pgoff+0x3af/0x500 [ 25.981616] do_syscall_64+0x3f/0x90 [ 25.982213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.982943] RIP: 0033:0x7fca91b11d82 [ 25.983467] 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 [ 25.985859] RSP: 002b:00007ffec0335e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.986884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca91b11d82 [ 25.987810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca90f4b000 [ 25.988774] RBP: 00007fca90f4b000 R08: 0000000000000009 R09: 0000000000001000 [ 25.989761] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555ed355ec0 [ 25.990764] R13: 00007ffec0335e60 R14: 00007ffec0335e90 R15: 00007ffec03361f0 [ 25.991643] [ 25.991939] [ 25.992149] Allocated by task 212: [ 25.992600] kasan_save_stack+0x22/0x50 [ 25.993107] kasan_set_track+0x25/0x30 [ 25.993608] __kasan_slab_alloc+0x59/0x70 [ 25.994229] kmem_cache_alloc+0x16b/0x370 [ 25.994803] vm_area_dup+0x20/0x160 [ 25.995305] __split_vma+0x170/0x950 [ 25.995792] split_vma+0xc6/0x110 [ 25.996289] mprotect_fixup+0x8d2/0xb30 [ 25.996793] do_mprotect_pkey+0x87e/0xd40 [ 25.997324] __x64_sys_mprotect+0x78/0xc0 [ 25.997839] do_syscall_64+0x3f/0x90 [ 25.998346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.999029] [ 25.999276] Freed by task 212: [ 25.999726] kasan_save_stack+0x22/0x50 [ 26.000313] kasan_set_track+0x25/0x30 [ 26.000793] kasan_save_free_info+0x2b/0x50 [ 26.001379] __kasan_slab_free+0x10a/0x190 [ 26.002005] kmem_cache_free+0x10d/0x4d0 [ 26.002627] rcu_core+0x8c8/0x2860 [ 26.003123] __do_softirq+0x1b7/0x7d4 [ 26.003633] [ 26.003854] Last potentially related work creation: [ 26.004508] kasan_save_stack+0x22/0x50 [ 26.005112] __kasan_record_aux_stack+0x8e/0xa0 [ 26.005804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.006574] remove_vma+0x139/0x170 [ 26.007119] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.007761] do_vmi_munmap+0x1f1/0x2b0 [ 26.008304] __vm_munmap+0x138/0x3a0 [ 26.008829] __x64_sys_munmap+0x59/0x80 [ 26.009363] do_syscall_64+0x3f/0x90 [ 26.009909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.010635] [ 26.010873] The buggy address belongs to the object at ffff88800e5303a0 [ 26.010873] which belongs to the cache vm_area_struct of size 168 [ 26.012592] The buggy address is located 88 bytes inside of [ 26.012592] freed 168-byte region [ffff88800e5303a0, ffff88800e530448) [ 26.014090] [ 26.014324] The buggy address belongs to the physical page: [ 26.015086] page:000000006c37e3d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe530 [ 26.016219] memcg:ffff88800e5c2501 [ 26.016642] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.017298] page_type: 0xffffffff() [ 26.017821] raw: 0100000000000200 ffff88800879fc80 ffffea00003901c0 dead000000000004 [ 26.018869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5c2501 [ 26.019872] page dumped because: kasan: bad access detected [ 26.020699] [ 26.020963] Memory state around the buggy address: [ 26.021677] ffff88800e530280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 26.022612] ffff88800e530300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 26.023561] >ffff88800e530380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 26.024534] ^ [ 26.025381] ffff88800e530400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.026233] ffff88800e530480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.027101] ================================================================== [ 26.028260] Disabling lock debugging due to kernel taint [ 28.388514] BUG: Bad rss-counter state mm:00000000e28c154f type:MM_FILEPAGES val:33 [ 28.389687] BUG: Bad rss-counter state mm:00000000e28c154f type:MM_ANONPAGES val:22 [ 28.854387] BUG: Bad rss-counter state mm:000000005bdcb9ef type:MM_FILEPAGES val:33 [ 28.855696] BUG: Bad rss-counter state mm:000000005bdcb9ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21674' (ECDSA) to the list of known hosts. 2023/06/20 01:59:41 fuzzer started 2023/06/20 01:59:41 dialing manager at localhost:44161 2023/06/20 01:59:41 checking machine... 2023/06/20 01:59:41 checking revisions... [ 29.596794] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:59:41 testing simple program... [ 29.657604] cgroup: Unknown subsys name 'net' [ 29.746027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:59:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5cebbc4ad0 CR3=000000000c918000 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=58cf88a7ab593387274f7c0d67a60889 XMM02=000000000011c400ec2efd57dc4c00df XMM03=00000000001232889981f04b13f4fb43 XMM04=8d34a2f0a7ed9c4b00000000000ae988 XMM05=dfcdbad4f1609c370000000000132e40 XMM06=8ad3a84c531ec7440000000000132018 XMM07=e042d86d42eb936e0000000000123508 XMM08=9981f04b13f4fb43000000000011c460 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff8170f069 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800fe57d90 RSP=ffff88800fe57bf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800e4da778 R13=ffff88800c4eabc8 R14=ffff88800fe57db8 R15=000000000febc067 RIP=ffffffff814c01d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f570b032900 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=00007f570b0ef50c CR3=0000000016e38000 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=6720646572637465733a4d41503d706f 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