syzkaller login: [ 38.727989] BUG: Bad rss-counter state mm:00000000ad7e4b7c type:MM_FILEPAGES val:33 [ 38.729342] BUG: Bad rss-counter state mm:00000000ad7e4b7c type:MM_ANONPAGES val:22 [ 38.832518] ================================================================== [ 38.833597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.834803] Read of size 8 at addr ffff888018c1a310 by task sshd/226 [ 38.835421] [ 38.835541] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.836014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.836545] Call Trace: [ 38.836721] [ 38.836880] dump_stack_lvl+0x91/0xf0 [ 38.837169] print_report+0xcc/0x620 [ 38.837434] ? __virt_addr_valid+0x102/0x340 [ 38.837734] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838076] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838411] kasan_report+0xbe/0xf0 [ 38.838670] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.839015] vma_interval_tree_remove+0xc75/0xec0 [ 38.839352] vma_prepare+0xc54/0x11a0 [ 38.839611] __split_vma+0x5af/0x950 [ 38.839870] ? __pfx___split_vma+0x10/0x10 [ 38.840165] ? find_held_lock+0x2c/0x110 [ 38.840450] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.840754] ? lock_is_held_type+0x9f/0x120 [ 38.841048] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.841391] ? mtree_range_walk+0x632/0x900 [ 38.841700] ? mas_walk+0x5c7/0x7c0 [ 38.841967] do_vmi_munmap+0x1f1/0x2b0 [ 38.842239] mmap_region+0x1f9/0x2660 [ 38.842511] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.842809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.843216] ? __pfx_lock_acquire+0x10/0x10 [ 38.843515] ? __pfx_mmap_region+0x10/0x10 [ 38.843814] ? security_mmap_addr+0x7d/0xa0 [ 38.844119] ? get_unmapped_area+0x1f5/0x3f0 [ 38.844431] do_mmap+0x854/0xf00 [ 38.844677] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.844952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.845266] ksys_mmap_pgoff+0x3af/0x500 [ 38.845561] do_syscall_64+0x3f/0x90 [ 38.845826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.846197] RIP: 0033:0x7fd0cff08d82 [ 38.846452] 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 [ 38.847648] RSP: 002b:00007ffe831352f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.848164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0cff08d82 [ 38.848650] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0cf342000 [ 38.849131] RBP: 00007fd0cf342000 R08: 0000000000000009 R09: 0000000000001000 [ 38.849608] R10: 0000000000000812 R11: 0000000000000206 R12: 000055766f85fec0 [ 38.850093] R13: 00007ffe83135310 R14: 00007ffe83135340 R15: 00007ffe831356a0 [ 38.850583] [ 38.850761] [ 38.850883] Allocated by task 219: [ 38.851127] kasan_save_stack+0x22/0x50 [ 38.851414] kasan_set_track+0x25/0x30 [ 38.851693] __kasan_slab_alloc+0x59/0x70 [ 38.851992] kmem_cache_alloc+0x16b/0x370 [ 38.852285] vm_area_dup+0x20/0x160 [ 38.852540] __split_vma+0x170/0x950 [ 38.852804] split_vma+0xc6/0x110 [ 38.853047] mprotect_fixup+0x8d2/0xb30 [ 38.853339] do_mprotect_pkey+0x87e/0xd40 [ 38.853636] __x64_sys_mprotect+0x78/0xc0 [ 38.853927] do_syscall_64+0x3f/0x90 [ 38.854191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854551] [ 38.854670] Freed by task 219: [ 38.854904] kasan_save_stack+0x22/0x50 [ 38.855193] kasan_set_track+0x25/0x30 [ 38.855467] kasan_save_free_info+0x2b/0x50 [ 38.855764] __kasan_slab_free+0x10a/0x190 [ 38.856069] kmem_cache_free+0x10d/0x4d0 [ 38.856360] rcu_core+0x8c8/0x2860 [ 38.856607] __do_softirq+0x1b7/0x7d4 [ 38.856889] [ 38.857007] Last potentially related work creation: [ 38.857344] kasan_save_stack+0x22/0x50 [ 38.857629] __kasan_record_aux_stack+0x8e/0xa0 [ 38.857953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.858320] remove_vma+0x139/0x170 [ 38.858570] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.858888] do_vmi_munmap+0x1f1/0x2b0 [ 38.859168] __vm_munmap+0x138/0x3a0 [ 38.859438] __x64_sys_munmap+0x59/0x80 [ 38.859724] do_syscall_64+0x3f/0x90 [ 38.859984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860331] [ 38.860449] The buggy address belongs to the object at ffff888018c1a2b8 [ 38.860449] which belongs to the cache vm_area_struct of size 168 [ 38.861245] The buggy address is located 88 bytes inside of [ 38.861245] freed 168-byte region [ffff888018c1a2b8, ffff888018c1a360) [ 38.861996] [ 38.862123] The buggy address belongs to the physical page: [ 38.862478] page:0000000067f57ea6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c1a [ 38.863077] memcg:ffff888019f64801 [ 38.863312] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.863663] page_type: 0xffffffff() [ 38.863911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.864402] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f64801 [ 38.864891] page dumped because: kasan: bad access detected [ 38.865259] [ 38.865383] Memory state around the buggy address: [ 38.865721] ffff888018c1a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.866216] ffff888018c1a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.866677] >ffff888018c1a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.867146] ^ [ 38.867396] ffff888018c1a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.867876] ffff888018c1a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.868400] ================================================================== [ 38.869007] Disabling lock debugging due to kernel taint [ 40.836552] BUG: Bad rss-counter state mm:000000007d19f917 type:MM_FILEPAGES val:33 [ 40.837656] BUG: Bad rss-counter state mm:000000007d19f917 type:MM_ANONPAGES val:22 [ 41.313231] BUG: Bad rss-counter state mm:00000000aaa91204 type:MM_FILEPAGES val:33 [ 41.314268] BUG: Bad rss-counter state mm:00000000aaa91204 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55710' (ECDSA) to the list of known hosts. 2023/06/19 15:59:03 fuzzer started 2023/06/19 15:59:04 dialing manager at localhost:44161 2023/06/19 15:59:04 checking machine... 2023/06/19 15:59:04 checking revisions... [ 41.963827] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:59:04 testing simple program... [ 42.020641] cgroup: Unknown subsys name 'net' [ 42.058393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:03 Registers: info registers vcpu 0 RAX=1ffffffff0bf8065 RBX=ffffffff85fc032c RCX=ffffffff83874351 RDX=0000000000000000 RSI=ffffffff863dcad0 RDI=ffffffff85fc032c RBP=ffffffff85fc032c RSP=ffff88806ce09998 R8 =ffffffff863dcad0 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000091bd6 R12=ffffffff85fc032c R13=ffffffff85fc032c R14=ffffffff85fc032c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007ff624b3e900 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=00007ff6250f5618 CR3=000000000fda2000 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=00007f436ca475e0 CR3=000000000c83c000 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=e202c8ceb75c75a41640e69a906e5c64 XMM02=000000000011da20eff9b2d0a8fce9cb XMM03=000000000011daf02c67c8bc2e329bc3 XMM04=52cc0a488006041200000000000ae988 XMM05=6860aeb314f8829d0000000000133d58 XMM06=13e856d8d71426c80000000000133be0 XMM07=e042d86d42eb936e0000000000124708 XMM08=92110a4788544f68000000000011daf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000