syzkaller login: [ 33.151250] BUG: Bad rss-counter state mm:0000000053f6846e type:MM_FILEPAGES val:33 [ 33.153125] BUG: Bad rss-counter state mm:0000000053f6846e type:MM_ANONPAGES val:22 [ 33.316417] ================================================================== [ 33.317326] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.318264] Read of size 8 at addr ffff8880197d8798 by task sshd/219 [ 33.319027] [ 33.319248] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.320198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.321215] Call Trace: [ 33.321623] [ 33.321941] dump_stack_lvl+0x91/0xf0 [ 33.322424] print_report+0xcc/0x620 [ 33.322906] ? __virt_addr_valid+0x102/0x340 [ 33.323454] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.324068] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.324677] kasan_report+0xbe/0xf0 [ 33.325154] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.325768] vma_interval_tree_remove+0xc75/0xec0 [ 33.326364] vma_prepare+0xc54/0x11a0 [ 33.326845] __split_vma+0x5af/0x950 [ 33.327314] ? __pfx___split_vma+0x10/0x10 [ 33.327840] ? find_held_lock+0x2c/0x110 [ 33.328360] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.328918] ? lock_is_held_type+0x9f/0x120 [ 33.329463] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.330069] ? mtree_range_walk+0x632/0x900 [ 33.330614] ? mas_walk+0x5c7/0x7c0 [ 33.331095] do_vmi_munmap+0x1f1/0x2b0 [ 33.331583] mmap_region+0x1f9/0x2660 [ 33.332064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.332570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.333290] ? __pfx_lock_acquire+0x10/0x10 [ 33.333821] ? __pfx_mmap_region+0x10/0x10 [ 33.334375] ? security_mmap_addr+0x7d/0xa0 [ 33.334919] ? get_unmapped_area+0x1f5/0x3f0 [ 33.335474] do_mmap+0x854/0xf00 [ 33.335908] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.336408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.336961] ksys_mmap_pgoff+0x3af/0x500 [ 33.337478] do_syscall_64+0x3f/0x90 [ 33.337957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.338604] RIP: 0033:0x7f1add270d82 [ 33.339061] 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 [ 33.341204] RSP: 002b:00007ffcdd8e25a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.342107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1add270d82 [ 33.342949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1adc6aa000 [ 33.343802] RBP: 00007f1adc6aa000 R08: 0000000000000009 R09: 0000000000001000 [ 33.344642] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562588788ec0 [ 33.345495] R13: 00007ffcdd8e25c0 R14: 00007ffcdd8e25f0 R15: 00007ffcdd8e2950 [ 33.346374] [ 33.346684] [ 33.346910] Allocated by task 212: [ 33.347348] kasan_save_stack+0x22/0x50 [ 33.347851] kasan_set_track+0x25/0x30 [ 33.348349] __kasan_slab_alloc+0x59/0x70 [ 33.348870] kmem_cache_alloc+0x16b/0x370 [ 33.349391] vm_area_dup+0x20/0x160 [ 33.349852] __split_vma+0x170/0x950 [ 33.350316] split_vma+0xc6/0x110 [ 33.350755] mprotect_fixup+0x8d2/0xb30 [ 33.351253] do_mprotect_pkey+0x87e/0xd40 [ 33.351771] __x64_sys_mprotect+0x78/0xc0 [ 33.352289] do_syscall_64+0x3f/0x90 [ 33.352760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.353423] [ 33.353637] Freed by task 212: [ 33.354031] kasan_save_stack+0x22/0x50 [ 33.354530] kasan_set_track+0x25/0x30 [ 33.355019] kasan_save_free_info+0x2b/0x50 [ 33.355546] __kasan_slab_free+0x10a/0x190 [ 33.356088] kmem_cache_free+0x10d/0x4d0 [ 33.356591] rcu_core+0x8c8/0x2860 [ 33.357032] __do_softirq+0x1b7/0x7d4 [ 33.357513] [ 33.357726] Last potentially related work creation: [ 33.358305] kasan_save_stack+0x22/0x50 [ 33.358805] __kasan_record_aux_stack+0x8e/0xa0 [ 33.359380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.360030] remove_vma+0x139/0x170 [ 33.360505] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.361089] do_vmi_munmap+0x1f1/0x2b0 [ 33.361622] __vm_munmap+0x138/0x3a0 [ 33.362113] __x64_sys_munmap+0x59/0x80 [ 33.362618] do_syscall_64+0x3f/0x90 [ 33.363097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.363739] [ 33.363954] Second to last potentially related work creation: [ 33.364640] kasan_save_stack+0x22/0x50 [ 33.365159] __kasan_record_aux_stack+0x8e/0xa0 [ 33.365735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.366370] remove_vma+0x139/0x170 [ 33.366823] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.367377] do_vmi_munmap+0x1f1/0x2b0 [ 33.367862] mmap_region+0x1f9/0x2660 [ 33.368339] do_mmap+0x854/0xf00 [ 33.368773] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.369268] ksys_mmap_pgoff+0x3af/0x500 [ 33.369768] do_syscall_64+0x3f/0x90 [ 33.370246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.370887] [ 33.371104] The buggy address belongs to the object at ffff8880197d8740 [ 33.371104] which belongs to the cache vm_area_struct of size 168 [ 33.372577] The buggy address is located 88 bytes inside of [ 33.372577] freed 168-byte region [ffff8880197d8740, ffff8880197d87e8) [ 33.374009] [ 33.374226] The buggy address belongs to the physical page: [ 33.374889] page:00000000d36da5cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197d8 [ 33.375986] memcg:ffff888019802101 [ 33.376418] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.377068] page_type: 0xffffffff() [ 33.377530] raw: 0100000000000200 ffff88800879fc80 ffffea000065edc0 000000000000000e [ 33.378450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019802101 [ 33.379360] page dumped because: kasan: bad access detected [ 33.380020] [ 33.380238] Memory state around the buggy address: [ 33.380820] ffff8880197d8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.381697] ffff8880197d8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.382558] >ffff8880197d8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.383413] ^ [ 33.383905] ffff8880197d8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.384771] ffff8880197d8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.385637] ================================================================== [ 33.386624] Disabling lock debugging due to kernel taint [ 35.305849] BUG: Bad rss-counter state mm:000000006cefdcdb type:MM_FILEPAGES val:33 [ 35.306782] BUG: Bad rss-counter state mm:000000006cefdcdb type:MM_ANONPAGES val:22 [ 35.753607] BUG: Bad rss-counter state mm:00000000c39b2bcd type:MM_FILEPAGES val:33 [ 35.754636] BUG: Bad rss-counter state mm:00000000c39b2bcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39779' (ECDSA) to the list of known hosts. 2023/06/19 17:28:56 fuzzer started 2023/06/19 17:28:56 dialing manager at localhost:44161 2023/06/19 17:28:56 checking machine... 2023/06/19 17:28:56 checking revisions... [ 36.469871] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:28:56 testing simple program... [ 36.514927] cgroup: Unknown subsys name 'net' [ 36.559133] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:28:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864eab00 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f4217656900 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=00007f4217c0b650 CR3=000000000ced6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffd8fe989b8 CR3=000000000e7ce000 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=2035353a38323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000