syzkaller login: [ 2371.761238] BUG: Bad rss-counter state mm:0000000058846fae type:MM_FILEPAGES val:33 [ 2371.762256] BUG: Bad rss-counter state mm:0000000058846fae type:MM_ANONPAGES val:22 [ 2371.798893] ================================================================== [ 2371.799848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 2371.800910] Read of size 8 at addr ffff88800c760968 by task sshd/224 [ 2371.801682] [ 2371.801901] CPU: 0 PID: 224 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 2371.802967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 2371.803957] Call Trace: [ 2371.804278] <TASK> [ 2371.804576] dump_stack_lvl+0x91/0xf0 [ 2371.805069] print_report+0xcc/0x620 [ 2371.805551] ? __virt_addr_valid+0x102/0x340 [ 2371.806104] ? vma_interval_tree_remove+0xc75/0xec0 [ 2371.806729] ? vma_interval_tree_remove+0xc75/0xec0 [ 2371.807373] kasan_report+0xbe/0xf0 [ 2371.807849] ? vma_interval_tree_remove+0xc75/0xec0 [ 2371.808466] vma_interval_tree_remove+0xc75/0xec0 [ 2371.809073] vma_prepare+0xc54/0x11a0 [ 2371.809547] __split_vma+0x5af/0x950 [ 2371.810023] ? __pfx___split_vma+0x10/0x10 [ 2371.810552] ? find_held_lock+0x2c/0x110 [ 2371.811099] do_vmi_align_munmap+0x2ba/0x11f0 [ 2371.811662] ? lock_is_held_type+0x9f/0x120 [ 2371.812213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 2371.812816] ? mtree_range_walk+0x632/0x900 [ 2371.813363] ? mas_walk+0x5c7/0x7c0 [ 2371.813840] do_vmi_munmap+0x1f1/0x2b0 [ 2371.814329] mmap_region+0x1f9/0x2660 [ 2371.814819] ? vm_mmap_pgoff+0x15c/0x3a0 [ 2371.815356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 2371.816095] ? __pfx_lock_acquire+0x10/0x10 [ 2371.816636] ? __pfx_mmap_region+0x10/0x10 [ 2371.817179] ? security_mmap_addr+0x7d/0xa0 [ 2371.817716] ? get_unmapped_area+0x1f5/0x3f0 [ 2371.818270] do_mmap+0x854/0xf00 [ 2371.818710] vm_mmap_pgoff+0x1a6/0x3a0 [ 2371.819230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 2371.819802] ksys_mmap_pgoff+0x3af/0x500 [ 2371.820312] do_syscall_64+0x3f/0x90 [ 2371.820806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 2371.821461] RIP: 0033:0x7f6e0e9d4d82 [ 2371.821935] 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 [ 2371.824098] RSP: 002b:00007ffde10ef168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 2371.825009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e0e9d4d82 [ 2371.825880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e0de0e000 [ 2371.826734] RBP: 00007f6e0de0e000 R08: 0000000000000009 R09: 0000000000001000 [ 2371.827607] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b87d61ec0 [ 2371.828454] R13: 00007ffde10ef180 R14: 00007ffde10ef1b0 R15: 00007ffde10ef510 [ 2371.829306] </TASK> [ 2371.829600] [ 2371.829818] Allocated by task 217: [ 2371.830249] kasan_save_stack+0x22/0x50 [ 2371.830752] kasan_set_track+0x25/0x30 [ 2371.831260] __kasan_slab_alloc+0x59/0x70 [ 2371.831796] kmem_cache_alloc+0x16b/0x370 [ 2371.832322] vm_area_dup+0x20/0x160 [ 2371.832776] __split_vma+0x170/0x950 [ 2371.833251] split_vma+0xc6/0x110 [ 2371.833691] mprotect_fixup+0x8d2/0xb30 [ 2371.834196] do_mprotect_pkey+0x87e/0xd40 [ 2371.834719] __x64_sys_mprotect+0x78/0xc0 [ 2371.835261] do_syscall_64+0x3f/0x90 [ 2371.835732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 2371.836379] [ 2371.836594] Freed by task 217: [ 2371.836983] kasan_save_stack+0x22/0x50 [ 2371.837489] kasan_set_track+0x25/0x30 [ 2371.837986] kasan_save_free_info+0x2b/0x50 [ 2371.838517] __kasan_slab_free+0x10a/0x190 [ 2371.839068] kmem_cache_free+0x10d/0x4d0 [ 2371.839577] rcu_core+0x8c8/0x2860 [ 2371.840033] __do_softirq+0x1b7/0x7d4 [ 2371.840509] [ 2371.840723] Last potentially related work creation: [ 2371.841305] kasan_save_stack+0x22/0x50 [ 2371.841812] __kasan_record_aux_stack+0x8e/0xa0 [ 2371.842384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 2371.843049] remove_vma+0x139/0x170 [ 2371.843502] do_vmi_align_munmap+0xd4a/0x11f0 [ 2371.844057] do_vmi_munmap+0x1f1/0x2b0 [ 2371.844542] __vm_munmap+0x138/0x3a0 [ 2371.845016] __x64_sys_munmap+0x59/0x80 [ 2371.845515] do_syscall_64+0x3f/0x90 [ 2371.845987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 2371.846626] [ 2371.846843] The buggy address belongs to the object at ffff88800c760910 [ 2371.846843] which belongs to the cache vm_area_struct of size 168 [ 2371.848325] The buggy address is located 88 bytes inside of [ 2371.848325] freed 168-byte region [ffff88800c760910, ffff88800c7609b8) [ 2371.849731] [ 2371.849953] The buggy address belongs to the physical page: [ 2371.850607] page:00000000bfaa6168 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc760 [ 2371.851715] memcg:ffff88800fde3101 [ 2371.852144] flags: 0x100000000000200(slab|node=0|zone=1) [ 2371.852797] page_type: 0xffffffff() [ 2371.853246] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 2371.854166] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fde3101 [ 2371.855091] page dumped because: kasan: bad access detected [ 2371.855756] [ 2371.855973] Memory state around the buggy address: [ 2371.856550] ffff88800c760800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 2371.857402] ffff88800c760880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 2371.858259] >ffff88800c760900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2371.859127] ^ [ 2371.859917] ffff88800c760980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 2371.860770] ffff88800c760a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2371.861631] ================================================================== [ 2371.862687] Disabling lock debugging due to kernel taint [ 2374.749651] BUG: Bad rss-counter state mm:00000000ffe6e590 type:MM_FILEPAGES val:33 [ 2374.750555] BUG: Bad rss-counter state mm:00000000ffe6e590 type:MM_ANONPAGES val:22 [ 2375.239630] BUG: Bad rss-counter state mm:000000002690fd80 type:MM_FILEPAGES val:33 [ 2375.240684] BUG: Bad rss-counter state mm:000000002690fd80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3035' (ECDSA) to the list of known hosts. 2023/06/20 05:47:34 fuzzer started 2023/06/20 05:47:34 dialing manager at localhost:44161 2023/06/20 05:47:35 checking machine... 2023/06/20 05:47:35 checking revisions... [ 2375.936793] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:47:35 testing simple program... [ 2375.985191] cgroup: Unknown subsys name 'net' [ 2376.021112] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:09:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce361a0 RCX=1ffffffff0f6ce40 RDX=1ffff1100d9c6c39 RSI=1ffff1100d9c6c3e RDI=ffff88806ce361f0 RBP=ffff888008cd3000 RSP=ffff8880169178e8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce361c8 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81830651 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 00007f3897692700 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=00007f0296b34ab0 CR3=000000000ca76000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30343631352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303436 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=0000000000000007 RBX=0000000000000001 RCX=ffffffff8121b36a RDX=00000000000021b3 RSI=00000000000021b3 RDI=ffffffff864f028c RBP=ffff888008e779b0 RSP=ffff888008e778e8 R8 =0000000000000000 R9 =ffff888008e77998 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e779b8 R13=ffff888008e779a0 R14=ffff888008e77999 R15=ffff888008e77958 RIP=ffffffff8113078b 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 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=00007fffe56ab000 CR3=000000000e3d2000 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