syzkaller login: [ 31.259518] BUG: Bad rss-counter state mm:0000000096fd67e4 type:MM_FILEPAGES val:33 [ 31.260732] BUG: Bad rss-counter state mm:0000000096fd67e4 type:MM_ANONPAGES val:22 [ 31.299192] ================================================================== [ 31.300285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.301225] Read of size 8 at addr ffff88800df27058 by task sshd/219 [ 31.302007] [ 31.302226] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.303087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.304068] Call Trace: [ 31.304404] [ 31.304689] dump_stack_lvl+0x91/0xf0 [ 31.305178] print_report+0xcc/0x620 [ 31.305667] ? __virt_addr_valid+0x102/0x340 [ 31.306216] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306831] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307445] kasan_report+0xbe/0xf0 [ 31.307917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.308662] vma_interval_tree_remove+0xc75/0xec0 [ 31.309271] vma_prepare+0xc54/0x11a0 [ 31.309766] __split_vma+0x5af/0x950 [ 31.310240] ? __pfx___split_vma+0x10/0x10 [ 31.310790] ? find_held_lock+0x2c/0x110 [ 31.311315] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.311882] ? lock_is_held_type+0x9f/0x120 [ 31.312447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.313055] ? mtree_range_walk+0x632/0x900 [ 31.313616] ? mas_walk+0x5c7/0x7c0 [ 31.314090] do_vmi_munmap+0x1f1/0x2b0 [ 31.314579] mmap_region+0x1f9/0x2660 [ 31.315071] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.315590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.316309] ? __pfx_lock_acquire+0x10/0x10 [ 31.316856] ? __pfx_mmap_region+0x10/0x10 [ 31.317387] ? security_mmap_addr+0x7d/0xa0 [ 31.317920] ? get_unmapped_area+0x1f5/0x3f0 [ 31.318467] do_mmap+0x854/0xf00 [ 31.318904] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.319396] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.319953] ksys_mmap_pgoff+0x3af/0x500 [ 31.320500] do_syscall_64+0x3f/0x90 [ 31.320994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321633] RIP: 0033:0x7fe44a6c4d82 [ 31.322088] 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 [ 31.324245] RSP: 002b:00007fff342d5f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.325161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe44a6c4d82 [ 31.326012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe449afe000 [ 31.326870] RBP: 00007fe449afe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.327737] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3a4f7aec0 [ 31.328611] R13: 00007fff342d5f60 R14: 00007fff342d5f90 R15: 00007fff342d62f0 [ 31.329493] [ 31.329789] [ 31.330005] Allocated by task 212: [ 31.330445] kasan_save_stack+0x22/0x50 [ 31.330958] kasan_set_track+0x25/0x30 [ 31.331456] __kasan_slab_alloc+0x59/0x70 [ 31.331994] kmem_cache_alloc+0x16b/0x370 [ 31.332540] vm_area_dup+0x20/0x160 [ 31.333005] __split_vma+0x170/0x950 [ 31.333471] split_vma+0xc6/0x110 [ 31.333922] mprotect_fixup+0x8d2/0xb30 [ 31.334432] do_mprotect_pkey+0x87e/0xd40 [ 31.334964] __x64_sys_mprotect+0x78/0xc0 [ 31.335493] do_syscall_64+0x3f/0x90 [ 31.335972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336648] [ 31.336868] Freed by task 212: [ 31.337258] kasan_save_stack+0x22/0x50 [ 31.337775] kasan_set_track+0x25/0x30 [ 31.338272] kasan_save_free_info+0x2b/0x50 [ 31.338820] __kasan_slab_free+0x10a/0x190 [ 31.339354] kmem_cache_free+0x10d/0x4d0 [ 31.339862] rcu_core+0x8c8/0x2860 [ 31.340324] __do_softirq+0x1b7/0x7d4 [ 31.340804] [ 31.341018] Last potentially related work creation: [ 31.341606] kasan_save_stack+0x22/0x50 [ 31.342113] __kasan_record_aux_stack+0x8e/0xa0 [ 31.342689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.343348] remove_vma+0x139/0x170 [ 31.343809] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.344397] do_vmi_munmap+0x1f1/0x2b0 [ 31.344895] __vm_munmap+0x138/0x3a0 [ 31.345368] __x64_sys_munmap+0x59/0x80 [ 31.345873] do_syscall_64+0x3f/0x90 [ 31.346342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346985] [ 31.347203] Second to last potentially related work creation: [ 31.347886] kasan_save_stack+0x22/0x50 [ 31.348565] __kasan_record_aux_stack+0x8e/0xa0 [ 31.349287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.350100] remove_vma+0x139/0x170 [ 31.350651] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.351329] do_vmi_munmap+0x1f1/0x2b0 [ 31.351949] __vm_munmap+0x138/0x3a0 [ 31.352590] __x64_sys_munmap+0x59/0x80 [ 31.353154] do_syscall_64+0x3f/0x90 [ 31.353636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.354283] [ 31.354500] The buggy address belongs to the object at ffff88800df27000 [ 31.354500] which belongs to the cache vm_area_struct of size 168 [ 31.355979] The buggy address is located 88 bytes inside of [ 31.355979] freed 168-byte region [ffff88800df27000, ffff88800df270a8) [ 31.357412] [ 31.357631] The buggy address belongs to the physical page: [ 31.358290] page:00000000aa804d63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf27 [ 31.359400] memcg:ffff88800e0bb201 [ 31.359820] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.360482] page_type: 0xffffffff() [ 31.360934] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.361852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0bb201 [ 31.362759] page dumped because: kasan: bad access detected [ 31.363452] [ 31.363668] Memory state around the buggy address: [ 31.364268] ffff88800df26f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.365130] ffff88800df26f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.365980] >ffff88800df27000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.366832] ^ [ 31.367593] ffff88800df27080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.368465] ffff88800df27100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.369323] ================================================================== [ 31.370378] Disabling lock debugging due to kernel taint [ 33.322443] BUG: Bad rss-counter state mm:0000000057ac8ebf type:MM_FILEPAGES val:33 [ 33.323576] BUG: Bad rss-counter state mm:0000000057ac8ebf type:MM_ANONPAGES val:22 [ 33.917278] BUG: Bad rss-counter state mm:00000000cbc1c708 type:MM_FILEPAGES val:33 [ 33.918473] BUG: Bad rss-counter state mm:00000000cbc1c708 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41807' (ECDSA) to the list of known hosts. 2023/06/19 22:20:19 fuzzer started 2023/06/19 22:20:20 dialing manager at localhost:44161 2023/06/19 22:20:20 checking machine... 2023/06/19 22:20:20 checking revisions... [ 34.575685] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:20:20 testing simple program... [ 34.620800] cgroup: Unknown subsys name 'net' [ 34.665258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:20:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801425b680 RSI=0000000000000800 RDI=0000000000000000 RBP=000000000ed9d900 RSP=ffff88801ca0fda0 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000800 R14=0000000000000001 R15=ffff88800ed9d900 RIP=ffffffff814c02f0 RFL=00000293 [--S-A-C] 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 00007efc9f7e9900 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=00007efc9fd9e650 CR3=0000000016dda000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100284ae99 RBX=ffff888014257558 RCX=ffff888014258000 RDX=0000000000000001 RSI=1ffff1100284ae9a RDI=ffff888014257470 RBP=dffffc0000000000 RSP=ffff888014257470 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880142574c0 R11=0030733a745f6c65 R12=ffffed100284ae9a R13=ffffed100284ae99 R14=ffff888014257508 R15=ffff8880142574c0 RIP=ffffffff81132faa 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 00007f7099608900 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=00007f7098b29000 CR3=000000001029c000 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=5fd12b80541491b0b74cc83d002ff8c3 XMM02=000000000011ce00eff9b2d0a8fce9cb XMM03=000000000011ced02c67c8bc2e329bc3 XMM04=ac19d4fa85185c1100000000000ae988 XMM05=281e89124a7173da0000000000135d80 XMM06=806171799158d9670000000000134800 XMM07=fb795ef6d65770560000000000123fc8 XMM08=2c67c8bc2e329bc3000000000011ce70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000