syzkaller login: [ 60.386655] BUG: Bad rss-counter state mm:0000000076eda691 type:MM_FILEPAGES val:33 [ 60.387775] BUG: Bad rss-counter state mm:0000000076eda691 type:MM_ANONPAGES val:22 [ 60.548095] ================================================================== [ 60.548957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.549832] Read of size 8 at addr ffff88800948adf0 by task sshd/220 [ 60.550553] [ 60.550758] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.551700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.552601] Call Trace: [ 60.552900] [ 60.553165] dump_stack_lvl+0x91/0xf0 [ 60.553657] print_report+0xcc/0x620 [ 60.554110] ? __virt_addr_valid+0x102/0x340 [ 60.554626] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.555230] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.555840] kasan_report+0xbe/0xf0 [ 60.556291] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.556871] vma_interval_tree_remove+0xc75/0xec0 [ 60.557440] vma_prepare+0xc54/0x11a0 [ 60.557892] __split_vma+0x5af/0x950 [ 60.558333] ? __pfx___split_vma+0x10/0x10 [ 60.558829] ? find_held_lock+0x2c/0x110 [ 60.559332] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.559864] ? lock_is_held_type+0x9f/0x120 [ 60.560370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.560940] ? mtree_range_walk+0x632/0x900 [ 60.561459] ? mas_walk+0x5c7/0x7c0 [ 60.561911] do_vmi_munmap+0x1f1/0x2b0 [ 60.562374] mmap_region+0x1f9/0x2660 [ 60.562827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.563344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.564008] ? __pfx_lock_acquire+0x10/0x10 [ 60.564509] ? __pfx_mmap_region+0x10/0x10 [ 60.565005] ? security_mmap_addr+0x7d/0xa0 [ 60.565499] ? get_unmapped_area+0x1f5/0x3f0 [ 60.566008] do_mmap+0x854/0xf00 [ 60.566421] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.566894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.567423] ksys_mmap_pgoff+0x3af/0x500 [ 60.567895] do_syscall_64+0x3f/0x90 [ 60.568345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.568955] RIP: 0033:0x7faf6b3abd82 [ 60.569385] 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 [ 60.571384] RSP: 002b:00007ffd70c5c378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.572234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf6b3abd82 [ 60.573018] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf6a7e5000 [ 60.573807] RBP: 00007faf6a7e5000 R08: 0000000000000009 R09: 0000000000001000 [ 60.574606] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574d11d3980 [ 60.575415] R13: 00007ffd70c5c390 R14: 00007ffd70c5c3c0 R15: 00007ffd70c5c720 [ 60.576217] [ 60.576491] [ 60.576693] Allocated by task 213: [ 60.577096] kasan_save_stack+0x22/0x50 [ 60.577569] kasan_set_track+0x25/0x30 [ 60.578034] __kasan_slab_alloc+0x59/0x70 [ 60.578526] kmem_cache_alloc+0x16b/0x370 [ 60.579017] vm_area_dup+0x20/0x160 [ 60.579445] __split_vma+0x170/0x950 [ 60.579882] split_vma+0xc6/0x110 [ 60.580294] mprotect_fixup+0x8d2/0xb30 [ 60.580768] do_mprotect_pkey+0x87e/0xd40 [ 60.581257] __x64_sys_mprotect+0x78/0xc0 [ 60.581743] do_syscall_64+0x3f/0x90 [ 60.582189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.582792] [ 60.583013] Freed by task 213: [ 60.583383] kasan_save_stack+0x22/0x50 [ 60.583862] kasan_set_track+0x25/0x30 [ 60.584324] kasan_save_free_info+0x2b/0x50 [ 60.584819] __kasan_slab_free+0x10a/0x190 [ 60.585318] kmem_cache_free+0x10d/0x4d0 [ 60.585796] rcu_core+0x8c8/0x2860 [ 60.586217] __do_softirq+0x1b7/0x7d4 [ 60.586668] [ 60.586879] Last potentially related work creation: [ 60.587425] kasan_save_stack+0x22/0x50 [ 60.587899] __kasan_record_aux_stack+0x8e/0xa0 [ 60.588432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.589033] remove_vma+0x139/0x170 [ 60.589458] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.589983] do_vmi_munmap+0x1f1/0x2b0 [ 60.590437] __vm_munmap+0x138/0x3a0 [ 60.590886] __x64_sys_munmap+0x59/0x80 [ 60.591348] do_syscall_64+0x3f/0x90 [ 60.591793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.592462] [ 60.592665] Second to last potentially related work creation: [ 60.593303] kasan_save_stack+0x22/0x50 [ 60.593776] __kasan_record_aux_stack+0x8e/0xa0 [ 60.594317] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.594929] remove_vma+0x139/0x170 [ 60.595353] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.595872] do_vmi_munmap+0x1f1/0x2b0 [ 60.596326] __vm_munmap+0x138/0x3a0 [ 60.596765] __x64_sys_munmap+0x59/0x80 [ 60.597235] do_syscall_64+0x3f/0x90 [ 60.597682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.598287] [ 60.598489] The buggy address belongs to the object at ffff88800948ad98 [ 60.598489] which belongs to the cache vm_area_struct of size 168 [ 60.599925] The buggy address is located 88 bytes inside of [ 60.599925] freed 168-byte region [ffff88800948ad98, ffff88800948ae40) [ 60.601326] [ 60.601542] The buggy address belongs to the physical page: [ 60.602204] page:000000008e22cb23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x948a [ 60.603308] memcg:ffff88800d189801 [ 60.603739] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.604435] page_type: 0xffffffff() [ 60.604883] raw: 0100000000000200 ffff8880087a0c80 ffffea0000267540 dead000000000007 [ 60.605808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d189801 [ 60.606709] page dumped because: kasan: bad access detected [ 60.607373] [ 60.607587] Memory state around the buggy address: [ 60.608163] ffff88800948ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 60.609028] ffff88800948ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 60.609880] >ffff88800948ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.610720] ^ [ 60.611534] ffff88800948ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.612386] ffff88800948ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.613238] ================================================================== [ 60.614267] Disabling lock debugging due to kernel taint [ 62.299989] BUG: Bad rss-counter state mm:000000002fd66c0e type:MM_FILEPAGES val:33 [ 62.301037] BUG: Bad rss-counter state mm:000000002fd66c0e type:MM_ANONPAGES val:22 [ 62.717813] BUG: Bad rss-counter state mm:00000000e6f11b73 type:MM_FILEPAGES val:33 [ 62.718742] BUG: Bad rss-counter state mm:00000000e6f11b73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31580' (ECDSA) to the list of known hosts. 2023/06/21 01:45:25 fuzzer started 2023/06/21 01:45:26 dialing manager at localhost:36067 2023/06/21 01:45:26 checking machine... 2023/06/21 01:45:26 checking revisions... [ 63.431610] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:45:26 testing simple program... [ 63.478836] cgroup: Unknown subsys name 'net' [ 63.536323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:45:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd207464e8 CR3=0000000015f4c000 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=2035323a35343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a35343a3130203132 XMM08=6e3d6469756120726f66207d20737574 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed100d9e13b8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8562be48 R15=0000000000000000 RIP=ffffffff812d9031 RFL=00000086 [--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 00007f979d4a9900 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=00007ffe73b4e000 CR3=000000000ee6a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000