syzkaller login: [ 38.796256] BUG: Bad rss-counter state mm:000000009fe9c310 type:MM_FILEPAGES val:33 [ 38.797580] BUG: Bad rss-counter state mm:000000009fe9c310 type:MM_ANONPAGES val:22 [ 38.837813] ================================================================== [ 38.838894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.839831] Read of size 8 at addr ffff888010298140 by task sshd/220 [ 38.840591] [ 38.840808] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.841884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.843088] Call Trace: [ 38.843464] [ 38.843798] dump_stack_lvl+0x91/0xf0 [ 38.844379] print_report+0xcc/0x620 [ 38.844945] ? __virt_addr_valid+0x102/0x340 [ 38.845599] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.846361] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847085] kasan_report+0xbe/0xf0 [ 38.847644] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.848378] vma_interval_tree_remove+0xc75/0xec0 [ 38.849085] vma_prepare+0xc54/0x11a0 [ 38.849653] __split_vma+0x5af/0x950 [ 38.850264] ? __pfx___split_vma+0x10/0x10 [ 38.850895] ? find_held_lock+0x2c/0x110 [ 38.851412] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.851975] ? asm_common_interrupt+0x26/0x40 [ 38.852545] ? lock_is_held_type+0x9f/0x120 [ 38.853084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.853694] ? mtree_range_walk+0x632/0x900 [ 38.854267] ? mas_walk+0x5c7/0x7c0 [ 38.854745] do_vmi_munmap+0x1f1/0x2b0 [ 38.855233] mmap_region+0x1f9/0x2660 [ 38.855713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.856221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.856934] ? __pfx_lock_acquire+0x10/0x10 [ 38.857467] ? __pfx_mmap_region+0x10/0x10 [ 38.857993] ? security_mmap_addr+0x7d/0xa0 [ 38.858554] ? get_unmapped_area+0x1f5/0x3f0 [ 38.859110] do_mmap+0x854/0xf00 [ 38.859551] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.860043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.860610] ksys_mmap_pgoff+0x3af/0x500 [ 38.861116] do_syscall_64+0x3f/0x90 [ 38.861592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862250] RIP: 0033:0x7fee10ca0d82 [ 38.862704] 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 [ 38.864834] RSP: 002b:00007ffe8dc2a928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.865746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee10ca0d82 [ 38.866626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee100da000 [ 38.867484] RBP: 00007fee100da000 R08: 0000000000000009 R09: 0000000000001000 [ 38.868326] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e7b15fec0 [ 38.869175] R13: 00007ffe8dc2a940 R14: 00007ffe8dc2a970 R15: 00007ffe8dc2acd0 [ 38.870049] [ 38.870348] [ 38.870564] Allocated by task 213: [ 38.870985] kasan_save_stack+0x22/0x50 [ 38.871489] kasan_set_track+0x25/0x30 [ 38.871978] __kasan_slab_alloc+0x59/0x70 [ 38.872494] kmem_cache_alloc+0x16b/0x370 [ 38.873007] vm_area_dup+0x20/0x160 [ 38.873467] __split_vma+0x170/0x950 [ 38.873933] split_vma+0xc6/0x110 [ 38.874396] mprotect_fixup+0x8d2/0xb30 [ 38.874899] do_mprotect_pkey+0x87e/0xd40 [ 38.875420] __x64_sys_mprotect+0x78/0xc0 [ 38.875944] do_syscall_64+0x3f/0x90 [ 38.876416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877056] [ 38.877270] Freed by task 213: [ 38.877666] kasan_save_stack+0x22/0x50 [ 38.878202] kasan_set_track+0x25/0x30 [ 38.878696] kasan_save_free_info+0x2b/0x50 [ 38.879233] __kasan_slab_free+0x10a/0x190 [ 38.879764] kmem_cache_free+0x10d/0x4d0 [ 38.880269] rcu_core+0x8c8/0x2860 [ 38.880710] __do_softirq+0x1b7/0x7d4 [ 38.881186] [ 38.881402] Last potentially related work creation: [ 38.881985] kasan_save_stack+0x22/0x50 [ 38.882516] __kasan_record_aux_stack+0x8e/0xa0 [ 38.883093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.883733] remove_vma+0x139/0x170 [ 38.884193] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.884758] do_vmi_munmap+0x1f1/0x2b0 [ 38.885246] __vm_munmap+0x138/0x3a0 [ 38.885713] __x64_sys_munmap+0x59/0x80 [ 38.886243] do_syscall_64+0x3f/0x90 [ 38.886717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887364] [ 38.887579] The buggy address belongs to the object at ffff8880102980e8 [ 38.887579] which belongs to the cache vm_area_struct of size 168 [ 38.889037] The buggy address is located 88 bytes inside of [ 38.889037] freed 168-byte region [ffff8880102980e8, ffff888010298190) [ 38.890482] [ 38.890695] The buggy address belongs to the physical page: [ 38.891357] page:000000004b2295f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10298 [ 38.892447] memcg:ffff88801429b201 [ 38.892870] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.893515] page_type: 0xffffffff() [ 38.893967] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.894931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801429b201 [ 38.895844] page dumped because: kasan: bad access detected [ 38.896504] [ 38.896722] Memory state around the buggy address: [ 38.897306] ffff888010298000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.898187] ffff888010298080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.899044] >ffff888010298100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.899900] ^ [ 38.900535] ffff888010298180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.901383] ffff888010298200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.902259] ================================================================== [ 38.903387] Disabling lock debugging due to kernel taint [ 41.051735] BUG: Bad rss-counter state mm:000000009bd9536c type:MM_FILEPAGES val:33 [ 41.052731] BUG: Bad rss-counter state mm:000000009bd9536c type:MM_ANONPAGES val:22 [ 41.542629] BUG: Bad rss-counter state mm:0000000087af9d84 type:MM_FILEPAGES val:33 [ 41.543568] BUG: Bad rss-counter state mm:0000000087af9d84 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35357' (ECDSA) to the list of known hosts. 2023/06/20 02:27:48 fuzzer started 2023/06/20 02:27:48 dialing manager at localhost:44161 2023/06/20 02:27:49 checking machine... 2023/06/20 02:27:49 checking revisions... [ 42.267273] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:27:49 testing simple program... [ 42.308936] cgroup: Unknown subsys name 'net' [ 42.348793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:27:40 Registers: info registers vcpu 0 RAX=0000000000091be7 RBX=0000000000000001 RCX=ffffffff83874fbb RDX=0000000000000001 RSI=000000000002874f RDI=ffffffff863dcb3c RBP=ffff8880163ff7a0 RSP=ffff8880163ff6d8 R8 =ffffffff863dcb36 R9 =ffff8880163ff788 R10=0000000000038001 R11=0000000000091be7 R12=ffff8880163ff7a8 R13=ffff8880163ff790 R14=ffff8880163ff789 R15=ffff8880163ff748 RIP=ffffffff81130871 RFL=00000202 [-------] 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 00007f627035c900 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=00007f6270913618 CR3=0000000016b20000 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=00007f498433d140 CR3=00000000136fa000 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=bcb7eebd8e5dd89a994e41107adf01d7 XMM02=2c67c8bc2e329bc3000000000011fe60 XMM03=fb795ef6d657705600000000001245c8 XMM04=3db227798aefda7100000000000ae988 XMM05=19e9129bd510f23500000000001342d0 XMM06=4fda316b135da52b0000000000134158 XMM07=e042d86d42eb936e0000000000124848 XMM08=88062686eb3f1c9b000000000011fec0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000