syzkaller login: [ 152.921774] BUG: Bad rss-counter state mm:000000009779ea64 type:MM_FILEPAGES val:33 [ 152.922355] BUG: Bad rss-counter state mm:000000009779ea64 type:MM_ANONPAGES val:22 [ 153.072061] ================================================================== [ 153.072974] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 153.073913] Read of size 8 at addr ffff88800ebe8a50 by task sshd/222 [ 153.074687] [ 153.074902] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 153.076114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 153.077104] Call Trace: [ 153.077426] [ 153.077717] dump_stack_lvl+0x91/0xf0 [ 153.078206] print_report+0xcc/0x620 [ 153.078713] ? __virt_addr_valid+0x102/0x340 [ 153.079268] ? vma_interval_tree_remove+0xc75/0xec0 [ 153.079888] ? vma_interval_tree_remove+0xc75/0xec0 [ 153.080506] kasan_report+0xbe/0xf0 [ 153.080984] ? vma_interval_tree_remove+0xc75/0xec0 [ 153.081603] vma_interval_tree_remove+0xc75/0xec0 [ 153.082211] vma_prepare+0xc54/0x11a0 [ 153.082694] __split_vma+0x5af/0x950 [ 153.083169] ? __pfx___split_vma+0x10/0x10 [ 153.083693] ? find_held_lock+0x2c/0x110 [ 153.084210] do_vmi_align_munmap+0x2ba/0x11f0 [ 153.084771] ? lock_is_held_type+0x9f/0x120 [ 153.085315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 153.085920] ? mtree_range_walk+0x632/0x900 [ 153.086477] ? mas_walk+0x5c7/0x7c0 [ 153.086950] do_vmi_munmap+0x1f1/0x2b0 [ 153.087440] mmap_region+0x1f9/0x2660 [ 153.087918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 153.088434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 153.089148] ? __pfx_lock_acquire+0x10/0x10 [ 153.089676] ? __pfx_mmap_region+0x10/0x10 [ 153.090206] ? security_mmap_addr+0x7d/0xa0 [ 153.090755] ? get_unmapped_area+0x1f5/0x3f0 [ 153.091309] do_mmap+0x854/0xf00 [ 153.091746] vm_mmap_pgoff+0x1a6/0x3a0 [ 153.092242] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 153.092809] ksys_mmap_pgoff+0x3af/0x500 [ 153.093326] do_syscall_64+0x3f/0x90 [ 153.093800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 153.094454] RIP: 0033:0x7f5d668bcd82 [ 153.094912] 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 [ 153.097059] RSP: 002b:00007ffed259a328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 153.097969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d668bcd82 [ 153.098829] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d65cf6000 [ 153.099683] RBP: 00007f5d65cf6000 R08: 0000000000000009 R09: 0000000000001000 [ 153.100529] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecaf05dec0 [ 153.101375] R13: 00007ffed259a340 R14: 00007ffed259a370 R15: 00007ffed259a6d0 [ 153.102229] [ 153.102542] [ 153.102760] Allocated by task 215: [ 153.103198] kasan_save_stack+0x22/0x50 [ 153.103705] kasan_set_track+0x25/0x30 [ 153.104198] __kasan_slab_alloc+0x59/0x70 [ 153.104722] kmem_cache_alloc+0x16b/0x370 [ 153.105235] vm_area_dup+0x20/0x160 [ 153.105687] __split_vma+0x170/0x950 [ 153.106154] split_vma+0xc6/0x110 [ 153.106602] mprotect_fixup+0x8d2/0xb30 [ 153.107109] do_mprotect_pkey+0x87e/0xd40 [ 153.107632] __x64_sys_mprotect+0x78/0xc0 [ 153.108150] do_syscall_64+0x3f/0x90 [ 153.108620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 153.109261] [ 153.109477] Freed by task 28: [ 153.109858] kasan_save_stack+0x22/0x50 [ 153.110361] kasan_set_track+0x25/0x30 [ 153.110862] kasan_save_free_info+0x2b/0x50 [ 153.111404] __kasan_slab_free+0x10a/0x190 [ 153.111946] kmem_cache_free+0x10d/0x4d0 [ 153.112455] rcu_core+0x8c8/0x2860 [ 153.112905] __do_softirq+0x1b7/0x7d4 [ 153.113387] [ 153.113608] Last potentially related work creation: [ 153.114196] kasan_save_stack+0x22/0x50 [ 153.114721] __kasan_record_aux_stack+0x8e/0xa0 [ 153.115296] __call_rcu_common.constprop.0+0x6a/0xb90 [ 153.115940] remove_vma+0x139/0x170 [ 153.116393] do_vmi_align_munmap+0xd4a/0x11f0 [ 153.117039] do_vmi_munmap+0x1f1/0x2b0 [ 153.117526] __vm_munmap+0x138/0x3a0 [ 153.117995] __x64_sys_munmap+0x59/0x80 [ 153.118504] do_syscall_64+0x3f/0x90 [ 153.118976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 153.119621] [ 153.119837] The buggy address belongs to the object at ffff88800ebe89f8 [ 153.119837] which belongs to the cache vm_area_struct of size 168 [ 153.121308] The buggy address is located 88 bytes inside of [ 153.121308] freed 168-byte region [ffff88800ebe89f8, ffff88800ebe8aa0) [ 153.122725] [ 153.122945] The buggy address belongs to the physical page: [ 153.123607] page:00000000d3c2e8c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebe8 [ 153.124697] memcg:ffff888019a6b401 [ 153.125125] flags: 0x100000000000200(slab|node=0|zone=1) [ 153.125769] page_type: 0xffffffff() [ 153.126225] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 153.127167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a6b401 [ 153.128076] page dumped because: kasan: bad access detected [ 153.128745] [ 153.128971] Memory state around the buggy address: [ 153.129560] ffff88800ebe8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 153.130429] ffff88800ebe8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 153.131296] >ffff88800ebe8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 153.132148] ^ [ 153.132861] ffff88800ebe8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 153.133722] ffff88800ebe8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 153.134610] ================================================================== [ 153.135646] Disabling lock debugging due to kernel taint [ 154.478561] BUG: Bad rss-counter state mm:00000000f9554b34 type:MM_FILEPAGES val:33 [ 154.479154] BUG: Bad rss-counter state mm:00000000f9554b34 type:MM_ANONPAGES val:22 [ 154.802484] BUG: Bad rss-counter state mm:000000000eb8cceb type:MM_FILEPAGES val:33 [ 154.803570] BUG: Bad rss-counter state mm:000000000eb8cceb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7314' (ECDSA) to the list of known hosts. 2023/06/19 15:13:26 fuzzer started 2023/06/19 15:13:26 dialing manager at localhost:44161 2023/06/19 15:13:26 checking machine... 2023/06/19 15:13:26 checking revisions... [ 155.465388] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:13:26 testing simple program... [ 155.521724] cgroup: Unknown subsys name 'net' [ 155.579478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:11:23 Registers: info registers vcpu 0 RAX=000000000008abed RBX=0000000000000001 RCX=ffffffff83644343 RDX=000000000008abf5 RSI=0000000000026443 RDI=ffffffff863b2b8a RBP=ffff8880175d75d8 RSP=ffff8880175d7510 R8 =ffffffff863b2b5a R9 =ffff8880175d75c0 R10=0000000000038001 R11=000000000008abed R12=ffff8880175d75e0 R13=ffff8880175d75c8 R14=ffff8880175d75c1 R15=ffff8880175d7580 RIP=ffffffff81130868 RFL=00000287 [--S--PC] 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 00007f2469f82900 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=00007ffc8c1e4000 CR3=000000001cd06000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fd6b33ce510 CR3=000000000dad2000 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=33313a3531203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383031 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000