syzkaller login: [ 60.729948] BUG: Bad rss-counter state mm:000000004e2305e0 type:MM_FILEPAGES val:33 [ 60.730728] BUG: Bad rss-counter state mm:000000004e2305e0 type:MM_ANONPAGES val:22 [ 60.798175] ================================================================== [ 60.798852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.799504] Read of size 8 at addr ffff8880183f4ed8 by task sshd/220 [ 60.800052] [ 60.800207] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.800939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.801633] Call Trace: [ 60.801863] [ 60.802081] dump_stack_lvl+0x91/0xf0 [ 60.802423] print_report+0xcc/0x620 [ 60.802907] ? __virt_addr_valid+0x102/0x340 [ 60.803289] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.803738] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.804178] kasan_report+0xbe/0xf0 [ 60.804517] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.804978] vma_interval_tree_remove+0xc75/0xec0 [ 60.805417] vma_prepare+0xc54/0x11a0 [ 60.805765] __split_vma+0x5af/0x950 [ 60.806107] ? __pfx___split_vma+0x10/0x10 [ 60.806486] ? find_held_lock+0x2c/0x110 [ 60.806873] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.807271] ? lock_is_held_type+0x9f/0x120 [ 60.807665] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.808105] ? mtree_range_walk+0x632/0x900 [ 60.808504] ? mas_walk+0x5c7/0x7c0 [ 60.808847] do_vmi_munmap+0x1f1/0x2b0 [ 60.809208] mmap_region+0x1f9/0x2660 [ 60.809551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.809915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.810427] ? __pfx_lock_acquire+0x10/0x10 [ 60.810833] ? __pfx_mmap_region+0x10/0x10 [ 60.811206] ? security_mmap_addr+0x7d/0xa0 [ 60.811587] ? get_unmapped_area+0x1f5/0x3f0 [ 60.811980] do_mmap+0x854/0xf00 [ 60.812291] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.812648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.813062] ksys_mmap_pgoff+0x3af/0x500 [ 60.813426] do_syscall_64+0x3f/0x90 [ 60.813774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.814230] RIP: 0033:0x7f1824e17d82 [ 60.814572] 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 [ 60.816116] RSP: 002b:00007fff9588c968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.816765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1824e17d82 [ 60.817386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1824251000 [ 60.817997] RBP: 00007f1824251000 R08: 0000000000000009 R09: 0000000000001000 [ 60.818622] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560388d36b20 [ 60.819238] R13: 00007fff9588c980 R14: 00007fff9588c9b0 R15: 00007fff9588cd10 [ 60.819846] [ 60.820055] [ 60.820210] Allocated by task 213: [ 60.820520] kasan_save_stack+0x22/0x50 [ 60.820887] kasan_set_track+0x25/0x30 [ 60.821242] __kasan_slab_alloc+0x59/0x70 [ 60.821614] kmem_cache_alloc+0x16b/0x370 [ 60.821984] vm_area_dup+0x20/0x160 [ 60.822302] __split_vma+0x170/0x950 [ 60.822663] split_vma+0xc6/0x110 [ 60.822991] mprotect_fixup+0x8d2/0xb30 [ 60.823347] do_mprotect_pkey+0x87e/0xd40 [ 60.823717] __x64_sys_mprotect+0x78/0xc0 [ 60.824096] do_syscall_64+0x3f/0x90 [ 60.824436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.824897] [ 60.825055] Freed by task 213: [ 60.825340] kasan_save_stack+0x22/0x50 [ 60.825705] kasan_set_track+0x25/0x30 [ 60.826063] kasan_save_free_info+0x2b/0x50 [ 60.826450] __kasan_slab_free+0x10a/0x190 [ 60.826861] kmem_cache_free+0x10d/0x4d0 [ 60.827224] rcu_core+0x8c8/0x2860 [ 60.827549] __do_softirq+0x1b7/0x7d4 [ 60.827896] [ 60.828050] Last potentially related work creation: [ 60.828469] kasan_save_stack+0x22/0x50 [ 60.828834] __kasan_record_aux_stack+0x8e/0xa0 [ 60.829257] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.829730] remove_vma+0x139/0x170 [ 60.830053] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.830448] do_vmi_munmap+0x1f1/0x2b0 [ 60.830817] __vm_munmap+0x138/0x3a0 [ 60.831153] __x64_sys_munmap+0x59/0x80 [ 60.831504] do_syscall_64+0x3f/0x90 [ 60.831838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.832294] [ 60.832449] The buggy address belongs to the object at ffff8880183f4e80 [ 60.832449] which belongs to the cache vm_area_struct of size 168 [ 60.833515] The buggy address is located 88 bytes inside of [ 60.833515] freed 168-byte region [ffff8880183f4e80, ffff8880183f4f28) [ 60.834526] [ 60.834700] The buggy address belongs to the physical page: [ 60.835178] page:000000001557145d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183f4 [ 60.835964] memcg:ffff888009873501 [ 60.836267] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.836732] page_type: 0xffffffff() [ 60.837056] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.837721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009873501 [ 60.838372] page dumped because: kasan: bad access detected [ 60.838861] [ 60.839020] Memory state around the buggy address: [ 60.839441] ffff8880183f4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.840069] ffff8880183f4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 60.840699] >ffff8880183f4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.841315] ^ [ 60.841848] ffff8880183f4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.842465] ffff8880183f4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.843099] ================================================================== [ 60.843841] Disabling lock debugging due to kernel taint [ 62.393856] BUG: Bad rss-counter state mm:000000008cd874c7 type:MM_FILEPAGES val:33 [ 62.394593] BUG: Bad rss-counter state mm:000000008cd874c7 type:MM_ANONPAGES val:22 [ 62.709842] BUG: Bad rss-counter state mm:000000004feefef4 type:MM_FILEPAGES val:33 [ 62.710528] BUG: Bad rss-counter state mm:000000004feefef4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51114' (ECDSA) to the list of known hosts. 2023/06/20 09:11:47 fuzzer started 2023/06/20 09:11:47 dialing manager at localhost:44161 2023/06/20 09:11:47 checking machine... 2023/06/20 09:11:47 checking revisions... [ 63.337291] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:11:47 testing simple program... [ 63.373421] cgroup: Unknown subsys name 'net' [ 63.419112] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:11:16 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=00007fc1c0e858b0 CR3=000000000c9d8000 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=f1026cd1f1ac4e98d84629c468b18658 XMM02=00000000001260f0ec2efd57dc4c00df XMM03=000000000012d59084c8514828024e03 XMM04=0d892d81687fbd7f00000000000ae988 XMM05=19e9129bd510f235000000000013cfd0 XMM06=53b1f447e0fbcc0d000000000013be38 XMM07=e042d86d42eb936e000000000012d810 XMM08=84c8514828024e030000000000126150 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff888016b77880 RSP=ffff888016b777b8 R8 =0000000000000000 R9 =ffff888016b77868 R10=0000000000038001 R11=0000000000010b7e R12=ffff888016b77888 R13=ffff888016b77870 R14=ffff888016b77869 R15=ffff888016b77828 RIP=ffffffff8113077a RFL=00000213 [----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 00007f8bc2222900 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=00007fff6901c000 CR3=000000000d928000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000