syzkaller login: [ 150.902485] BUG: Bad rss-counter state mm:0000000013b5a712 type:MM_FILEPAGES val:33 [ 150.903937] BUG: Bad rss-counter state mm:0000000013b5a712 type:MM_ANONPAGES val:22 [ 151.065476] ================================================================== [ 151.066417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 151.067332] Read of size 8 at addr ffff88801454fdf0 by task sshd/220 [ 151.068075] [ 151.068288] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 151.069485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 151.070510] Call Trace: [ 151.070823] [ 151.071099] dump_stack_lvl+0x91/0xf0 [ 151.071589] print_report+0xcc/0x620 [ 151.072083] ? __virt_addr_valid+0x102/0x340 [ 151.072622] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.073227] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.073831] kasan_report+0xbe/0xf0 [ 151.074306] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.074917] vma_interval_tree_remove+0xc75/0xec0 [ 151.075509] vma_prepare+0xc54/0x11a0 [ 151.075977] __split_vma+0x5af/0x950 [ 151.076443] ? __pfx___split_vma+0x10/0x10 [ 151.076962] ? find_held_lock+0x2c/0x110 [ 151.077474] do_vmi_align_munmap+0x2ba/0x11f0 [ 151.078031] ? lock_is_held_type+0x9f/0x120 [ 151.078573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 151.079171] ? mtree_range_walk+0x632/0x900 [ 151.079711] ? mas_walk+0x5c7/0x7c0 [ 151.080178] do_vmi_munmap+0x1f1/0x2b0 [ 151.080664] mmap_region+0x1f9/0x2660 [ 151.081139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 151.081642] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 151.082358] ? __pfx_lock_acquire+0x10/0x10 [ 151.082884] ? __pfx_mmap_region+0x10/0x10 [ 151.083407] ? security_mmap_addr+0x7d/0xa0 [ 151.083930] ? get_unmapped_area+0x1f5/0x3f0 [ 151.084472] do_mmap+0x854/0xf00 [ 151.084904] vm_mmap_pgoff+0x1a6/0x3a0 [ 151.085392] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 151.085946] ksys_mmap_pgoff+0x3af/0x500 [ 151.086457] do_syscall_64+0x3f/0x90 [ 151.086926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.087562] RIP: 0033:0x7fe6184d9d82 [ 151.088015] 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 [ 151.090128] RSP: 002b:00007ffe35afc5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 151.091022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6184d9d82 [ 151.091858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe617913000 [ 151.092695] RBP: 00007fe617913000 R08: 0000000000000009 R09: 0000000000001000 [ 151.093528] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d1a2a6d90 [ 151.094370] R13: 00007ffe35afc5e0 R14: 00007ffe35afc610 R15: 00007ffe35afc970 [ 151.095205] [ 151.095494] [ 151.095705] Allocated by task 213: [ 151.096124] kasan_save_stack+0x22/0x50 [ 151.096618] kasan_set_track+0x25/0x30 [ 151.097103] __kasan_slab_alloc+0x59/0x70 [ 151.097620] kmem_cache_alloc+0x16b/0x370 [ 151.098134] vm_area_dup+0x20/0x160 [ 151.098581] __split_vma+0x170/0x950 [ 151.099038] split_vma+0xc6/0x110 [ 151.099469] mprotect_fixup+0x8d2/0xb30 [ 151.099960] do_mprotect_pkey+0x87e/0xd40 [ 151.100471] __x64_sys_mprotect+0x78/0xc0 [ 151.100982] do_syscall_64+0x3f/0x90 [ 151.101449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.102075] [ 151.102309] Freed by task 213: [ 151.102698] kasan_save_stack+0x22/0x50 [ 151.103194] kasan_set_track+0x25/0x30 [ 151.103680] kasan_save_free_info+0x2b/0x50 [ 151.104203] __kasan_slab_free+0x10a/0x190 [ 151.104726] kmem_cache_free+0x10d/0x4d0 [ 151.105224] rcu_core+0x8c8/0x2860 [ 151.105661] __do_softirq+0x1b7/0x7d4 [ 151.106158] [ 151.106376] Last potentially related work creation: [ 151.106954] kasan_save_stack+0x22/0x50 [ 151.107453] __kasan_record_aux_stack+0x8e/0xa0 [ 151.108016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 151.108650] remove_vma+0x139/0x170 [ 151.109093] do_vmi_align_munmap+0xd4a/0x11f0 [ 151.109642] do_vmi_munmap+0x1f1/0x2b0 [ 151.110208] __vm_munmap+0x138/0x3a0 [ 151.110671] __x64_sys_munmap+0x59/0x80 [ 151.111157] do_syscall_64+0x3f/0x90 [ 151.111626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.112422] [ 151.112652] The buggy address belongs to the object at ffff88801454fd98 [ 151.112652] which belongs to the cache vm_area_struct of size 168 [ 151.114185] The buggy address is located 88 bytes inside of [ 151.114185] freed 168-byte region [ffff88801454fd98, ffff88801454fe40) [ 151.115618] [ 151.115843] The buggy address belongs to the physical page: [ 151.116512] page:000000008697437f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1454f [ 151.117625] memcg:ffff88800ed75801 [ 151.118056] flags: 0x100000000000200(slab|node=0|zone=1) [ 151.118742] page_type: 0xffffffff() [ 151.119203] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 151.120143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed75801 [ 151.121060] page dumped because: kasan: bad access detected [ 151.121732] [ 151.121955] Memory state around the buggy address: [ 151.122552] ffff88801454fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 151.123418] ffff88801454fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 151.124278] >ffff88801454fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 151.125139] ^ [ 151.125946] ffff88801454fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 151.126824] ffff88801454fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 151.127676] ================================================================== [ 151.128679] Disabling lock debugging due to kernel taint [ 153.110336] BUG: Bad rss-counter state mm:00000000e54a9979 type:MM_FILEPAGES val:33 [ 153.111332] BUG: Bad rss-counter state mm:00000000e54a9979 type:MM_ANONPAGES val:22 [ 153.571340] BUG: Bad rss-counter state mm:00000000e1b58333 type:MM_FILEPAGES val:33 [ 153.572338] BUG: Bad rss-counter state mm:00000000e1b58333 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22172' (ECDSA) to the list of known hosts. 2023/06/19 14:41:55 fuzzer started 2023/06/19 14:41:55 dialing manager at localhost:44161 2023/06/19 14:41:55 checking machine... 2023/06/19 14:41:55 checking revisions... [ 154.298922] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:41:55 testing simple program... [ 154.348840] cgroup: Unknown subsys name 'net' [ 154.385937] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:39:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86137501 RDX=1ffff110032bbe5b RSI=ffffffff8180c585 RDI=ffff8880195df2d8 RBP=ffff8880195df370 RSP=ffff8880195df268 R8 =ffffffff8613751e R9 =ffff8880195df318 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880195df3a0 R13=0000000000000000 R14=ffff888019688000 R15=ffff8880195df2d8 RIP=ffffffff8113060b 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 00007f8b07ee4900 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=00007f8b0849b618 CR3=00000000164fe000 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=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 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=00007f39526ef320 CR3=0000000008ed2000 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=678350c616fdcfb7f343af8b7ee98d79 XMM02=0000000000128688ec2efd57dc4c00df XMM03=0000000000130030f6e716452f6d71e3 XMM04=e2b5f1ead9610f6600000000000ae988 XMM05=19e9129bd510f235000000000013fc70 XMM06=b43a4ee7fee89681000000000013ead8 XMM07=e042d86d42eb936e00000000001302b0 XMM08=f6e716452f6d71e300000000001286e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000