syzkaller login: [ 30.715024] BUG: Bad rss-counter state mm:000000002f4757be type:MM_FILEPAGES val:33 [ 30.716014] BUG: Bad rss-counter state mm:000000002f4757be type:MM_ANONPAGES val:22 [ 30.879007] ================================================================== [ 30.879903] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.880841] Read of size 8 at addr ffff8880147e2a50 by task sshd/220 [ 30.881612] [ 30.881932] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.882788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.883756] Call Trace: [ 30.884084] [ 30.884370] dump_stack_lvl+0x91/0xf0 [ 30.884858] print_report+0xcc/0x620 [ 30.885365] ? __virt_addr_valid+0x102/0x340 [ 30.885907] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886520] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887127] kasan_report+0xbe/0xf0 [ 30.887598] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888230] vma_interval_tree_remove+0xc75/0xec0 [ 30.888866] vma_prepare+0xc54/0x11a0 [ 30.889379] __split_vma+0x5af/0x950 [ 30.889888] ? __pfx___split_vma+0x10/0x10 [ 30.890439] ? find_held_lock+0x2c/0x110 [ 30.890976] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.891562] ? lock_is_held_type+0x9f/0x120 [ 30.892128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.892753] ? mtree_range_walk+0x632/0x900 [ 30.893330] ? mas_walk+0x5c7/0x7c0 [ 30.893819] do_vmi_munmap+0x1f1/0x2b0 [ 30.894326] mmap_region+0x1f9/0x2660 [ 30.894821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.895349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.896075] ? __pfx_lock_acquire+0x10/0x10 [ 30.896604] ? __pfx_mmap_region+0x10/0x10 [ 30.897151] ? security_mmap_addr+0x7d/0xa0 [ 30.897679] ? get_unmapped_area+0x1f5/0x3f0 [ 30.898223] do_mmap+0x854/0xf00 [ 30.898658] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.899149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.899705] ksys_mmap_pgoff+0x3af/0x500 [ 30.900207] do_syscall_64+0x3f/0x90 [ 30.900682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901337] RIP: 0033:0x7f5e814bbd82 [ 30.901795] 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 [ 30.903925] RSP: 002b:00007ffc0d5444d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.904830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e814bbd82 [ 30.905712] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e808f5000 [ 30.906563] RBP: 00007f5e808f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.907416] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623b324e980 [ 30.908267] R13: 00007ffc0d5444f0 R14: 00007ffc0d544520 R15: 00007ffc0d544880 [ 30.909136] [ 30.909427] [ 30.909640] Allocated by task 213: [ 30.910074] kasan_save_stack+0x22/0x50 [ 30.910574] kasan_set_track+0x25/0x30 [ 30.911067] __kasan_slab_alloc+0x59/0x70 [ 30.911589] kmem_cache_alloc+0x16b/0x370 [ 30.912103] vm_area_dup+0x20/0x160 [ 30.912554] __split_vma+0x170/0x950 [ 30.913026] split_vma+0xc6/0x110 [ 30.913459] mprotect_fixup+0x8d2/0xb30 [ 30.913973] do_mprotect_pkey+0x87e/0xd40 [ 30.914493] __x64_sys_mprotect+0x78/0xc0 [ 30.915009] do_syscall_64+0x3f/0x90 [ 30.915478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916117] [ 30.916334] Freed by task 213: [ 30.916720] kasan_save_stack+0x22/0x50 [ 30.917243] kasan_set_track+0x25/0x30 [ 30.917730] kasan_save_free_info+0x2b/0x50 [ 30.918256] __kasan_slab_free+0x10a/0x190 [ 30.918782] kmem_cache_free+0x10d/0x4d0 [ 30.919290] rcu_core+0x8c8/0x2860 [ 30.919730] __do_softirq+0x1b7/0x7d4 [ 30.920207] [ 30.920421] Last potentially related work creation: [ 30.921010] kasan_save_stack+0x22/0x50 [ 30.921504] __kasan_record_aux_stack+0x8e/0xa0 [ 30.922073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922708] remove_vma+0x139/0x170 [ 30.923155] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923705] do_vmi_munmap+0x1f1/0x2b0 [ 30.924193] __vm_munmap+0x138/0x3a0 [ 30.924656] __x64_sys_munmap+0x59/0x80 [ 30.925171] do_syscall_64+0x3f/0x90 [ 30.925639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926271] [ 30.926483] The buggy address belongs to the object at ffff8880147e29f8 [ 30.926483] which belongs to the cache vm_area_struct of size 168 [ 30.927939] The buggy address is located 88 bytes inside of [ 30.927939] freed 168-byte region [ffff8880147e29f8, ffff8880147e2aa0) [ 30.929347] [ 30.929561] The buggy address belongs to the physical page: [ 30.930215] page:00000000b6ccbce4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147e2 [ 30.931299] memcg:ffff888016893201 [ 30.931725] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.932367] page_type: 0xffffffff() [ 30.932816] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.933728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016893201 [ 30.934633] page dumped because: kasan: bad access detected [ 30.935281] [ 30.935493] Memory state around the buggy address: [ 30.936067] ffff8880147e2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.936931] ffff8880147e2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.937786] >ffff8880147e2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.938632] ^ [ 30.939332] ffff8880147e2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.940180] ffff8880147e2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.941038] ================================================================== [ 30.942021] Disabling lock debugging due to kernel taint [ 32.549306] BUG: Bad rss-counter state mm:00000000d6393d9f type:MM_FILEPAGES val:33 [ 32.549905] BUG: Bad rss-counter state mm:00000000d6393d9f type:MM_ANONPAGES val:22 [ 33.023932] BUG: Bad rss-counter state mm:00000000fefa3421 type:MM_FILEPAGES val:33 [ 33.024953] BUG: Bad rss-counter state mm:00000000fefa3421 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13710' (ECDSA) to the list of known hosts. 2023/06/21 06:02:30 fuzzer started 2023/06/21 06:02:30 dialing manager at localhost:36067 2023/06/21 06:02:30 checking machine... 2023/06/21 06:02:30 checking revisions... [ 33.706718] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:02:30 testing simple program... [ 33.753394] cgroup: Unknown subsys name 'net' [ 33.799494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:30 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=00007f9d2f3c4e90 CR3=000000000e20e000 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=32303a3630203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3230 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363635 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=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88801643ff30 RSI=ffff88801643ff08 RDI=ffff88801643fab0 RBP=ffff88801643fb38 RSP=ffff88801643faa0 R8 =0000000000000001 R9 =ffff88801643fae0 R10=0000000000038001 R11=000000000002494a R12=ffff88801643fb68 R13=0000000000000000 R14=ffff88800dcab680 R15=dffffc0000000000 RIP=ffffffff810bd05d RFL=00000282 [--S----] 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 00007f5397f8c900 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=00007f5398543618 CR3=000000001652a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000