syzkaller login: [ 38.521198] BUG: Bad rss-counter state mm:0000000017fcc811 type:MM_FILEPAGES val:33 [ 38.523576] BUG: Bad rss-counter state mm:0000000017fcc811 type:MM_ANONPAGES val:22 [ 38.744978] ================================================================== [ 38.745666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.754388] Read of size 8 at addr ffff88800ee11140 by task sshd/221 [ 38.754967] [ 38.755129] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.755769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.756493] Call Trace: [ 38.756733] [ 38.756948] dump_stack_lvl+0x91/0xf0 [ 38.757324] print_report+0xcc/0x620 [ 38.757694] ? __virt_addr_valid+0x102/0x340 [ 38.758131] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.758599] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.759058] kasan_report+0xbe/0xf0 [ 38.759414] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.759875] vma_interval_tree_remove+0xc75/0xec0 [ 38.760324] vma_prepare+0xc54/0x11a0 [ 38.760675] __split_vma+0x5af/0x950 [ 38.761026] ? __pfx___split_vma+0x10/0x10 [ 38.761430] ? find_held_lock+0x2c/0x110 [ 38.761818] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.762278] ? lock_is_held_type+0x9f/0x120 [ 38.762692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.763154] ? mtree_range_walk+0x632/0x900 [ 38.763570] ? mas_walk+0x5c7/0x7c0 [ 38.763921] do_vmi_munmap+0x1f1/0x2b0 [ 38.764295] mmap_region+0x1f9/0x2660 [ 38.764659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.765041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.765578] ? __pfx_lock_acquire+0x10/0x10 [ 38.765989] ? __pfx_mmap_region+0x10/0x10 [ 38.766412] ? security_mmap_addr+0x7d/0xa0 [ 38.766812] ? get_unmapped_area+0x1f5/0x3f0 [ 38.767217] do_mmap+0x854/0xf00 [ 38.767542] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.767909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.768338] ksys_mmap_pgoff+0x3af/0x500 [ 38.768712] do_syscall_64+0x3f/0x90 [ 38.769079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.769540] RIP: 0033:0x7f652c9fdd82 [ 38.769843] 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 [ 38.771219] RSP: 002b:00007ffe42727088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.771803] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f652c9fdd82 [ 38.772350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f652be37000 [ 38.772896] RBP: 00007f652be37000 R08: 0000000000000009 R09: 0000000000001000 [ 38.773438] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ec80c9b20 [ 38.773979] R13: 00007ffe427270a0 R14: 00007ffe427270d0 R15: 00007ffe42727430 [ 38.774597] [ 38.774811] [ 38.774969] Allocated by task 212: [ 38.775295] kasan_save_stack+0x22/0x50 [ 38.775674] kasan_set_track+0x25/0x30 [ 38.776054] __kasan_slab_alloc+0x59/0x70 [ 38.776458] kmem_cache_alloc+0x16b/0x370 [ 38.776845] vm_area_dup+0x20/0x160 [ 38.777185] __split_vma+0x170/0x950 [ 38.777542] split_vma+0xc6/0x110 [ 38.777880] mprotect_fixup+0x8d2/0xb30 [ 38.778288] do_mprotect_pkey+0x87e/0xd40 [ 38.778693] __x64_sys_mprotect+0x78/0xc0 [ 38.779084] do_syscall_64+0x3f/0x90 [ 38.779432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.779918] [ 38.780083] Freed by task 212: [ 38.780388] kasan_save_stack+0x22/0x50 [ 38.780766] kasan_set_track+0x25/0x30 [ 38.781139] kasan_save_free_info+0x2b/0x50 [ 38.781551] __kasan_slab_free+0x10a/0x190 [ 38.781945] kmem_cache_free+0x10d/0x4d0 [ 38.782343] rcu_core+0x8c8/0x2860 [ 38.782680] __do_softirq+0x1b7/0x7d4 [ 38.783033] [ 38.783190] Last potentially related work creation: [ 38.783598] kasan_save_stack+0x22/0x50 [ 38.783921] __kasan_record_aux_stack+0x8e/0xa0 [ 38.784288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.784703] remove_vma+0x139/0x170 [ 38.784981] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.785322] do_vmi_munmap+0x1f1/0x2b0 [ 38.785614] __vm_munmap+0x138/0x3a0 [ 38.785916] __x64_sys_munmap+0x59/0x80 [ 38.786272] do_syscall_64+0x3f/0x90 [ 38.786588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.787003] [ 38.787149] Second to last potentially related work creation: [ 38.787586] kasan_save_stack+0x22/0x50 [ 38.787915] __kasan_record_aux_stack+0x8e/0xa0 [ 38.788288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.788709] remove_vma+0x139/0x170 [ 38.789003] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.789365] do_vmi_munmap+0x1f1/0x2b0 [ 38.789684] __vm_munmap+0x138/0x3a0 [ 38.789988] __x64_sys_munmap+0x59/0x80 [ 38.790326] do_syscall_64+0x3f/0x90 [ 38.790638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.791057] [ 38.791208] The buggy address belongs to the object at ffff88800ee110e8 [ 38.791208] which belongs to the cache vm_area_struct of size 168 [ 38.792152] The buggy address is located 88 bytes inside of [ 38.792152] freed 168-byte region [ffff88800ee110e8, ffff88800ee11190) [ 38.793055] [ 38.793201] The buggy address belongs to the physical page: [ 38.793631] page:000000009b0f8502 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee11 [ 38.794369] memcg:ffff88800f2e5001 [ 38.794690] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.795190] page_type: 0xffffffff() [ 38.795527] raw: 0100000000000200 ffff8880087a0c80 ffffea00004ea780 dead000000000008 [ 38.796222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2e5001 [ 38.796896] page dumped because: kasan: bad access detected [ 38.797401] [ 38.797564] Memory state around the buggy address: [ 38.798001] ffff88800ee11000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.798687] ffff88800ee11080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.799328] >ffff88800ee11100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.799964] ^ [ 38.800435] ffff88800ee11180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.801065] ffff88800ee11200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.801716] ================================================================== [ 38.802621] Disabling lock debugging due to kernel taint [ 40.751321] BUG: Bad rss-counter state mm:000000000c2ba463 type:MM_FILEPAGES val:33 [ 40.753124] BUG: Bad rss-counter state mm:000000000c2ba463 type:MM_ANONPAGES val:22 [ 41.858241] BUG: Bad rss-counter state mm:00000000f52968c0 type:MM_FILEPAGES val:33 [ 41.858922] BUG: Bad rss-counter state mm:00000000f52968c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63257' (ECDSA) to the list of known hosts. 2023/06/21 08:18:18 fuzzer started 2023/06/21 08:18:18 dialing manager at localhost:36067 2023/06/21 08:18:18 checking machine... 2023/06/21 08:18:18 checking revisions... [ 42.850201] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:18:19 testing simple program... [ 42.907580] cgroup: Unknown subsys name 'net' [ 43.009063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:18:18 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff8880169f9b40 RSI=ffffffff8170daf5 RDI=0000000000000007 RBP=ffff88800edb8570 RSP=ffff888019f77ad8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f101986e000 R13=00007f1019891000 R14=ffff888019f77b80 R15=ffff88800edb85f8 RIP=ffffffff814c0871 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 0000000000000000 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=00007f1019679328 CR3=000000000e502000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff8880102e7de0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800d5c5540 RSP=ffff8880102e7c88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800d5c54d0 R13=ffff88800d5c54d0 R14=dffffc0000000000 R15=ffff88800d5c54d0 RIP=ffffffff84534f64 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 00007f19b7795900 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=00007f19b6ca3238 CR3=000000000c916000 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=ede3c0231e115eb6d74b639da25d506a XMM02=2c67c8bc2e329bc3000000000011eae0 XMM03=e042d86d42eb936e0000000000121ab0 XMM04=0ce9d960c9e2afa600000000000ae988 XMM05=1319e678c5640f8a00000000001331b8 XMM06=c291bd5c70af25b90000000000133060 XMM07=139997807ff5a4420000000000123200 XMM08=e1353cc91df538a70000000000122810 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000