syzkaller login: [ 35.581649] BUG: Bad rss-counter state mm:000000001dadf961 type:MM_FILEPAGES val:33 [ 35.583173] BUG: Bad rss-counter state mm:000000001dadf961 type:MM_ANONPAGES val:22 [ 35.752993] ================================================================== [ 35.753947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.754928] Read of size 8 at addr ffff8880099bbdf0 by task sshd/221 [ 35.755750] [ 35.755981] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.757058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.758101] Call Trace: [ 35.758464] [ 35.758763] dump_stack_lvl+0x91/0xf0 [ 35.759284] print_report+0xcc/0x620 [ 35.759830] ? __virt_addr_valid+0x102/0x340 [ 35.760413] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.761065] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.761717] kasan_report+0xbe/0xf0 [ 35.762219] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.762895] vma_interval_tree_remove+0xc75/0xec0 [ 35.763564] vma_prepare+0xc54/0x11a0 [ 35.764108] __split_vma+0x5af/0x950 [ 35.764633] ? __pfx___split_vma+0x10/0x10 [ 35.765223] ? find_held_lock+0x2c/0x110 [ 35.765797] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.766425] ? lock_is_held_type+0x9f/0x120 [ 35.767027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.767728] ? mtree_range_walk+0x632/0x900 [ 35.768346] ? mas_walk+0x5c7/0x7c0 [ 35.768871] do_vmi_munmap+0x1f1/0x2b0 [ 35.769424] mmap_region+0x1f9/0x2660 [ 35.769961] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.770522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.771317] ? __pfx_lock_acquire+0x10/0x10 [ 35.771930] ? __pfx_mmap_region+0x10/0x10 [ 35.772519] ? security_mmap_addr+0x7d/0xa0 [ 35.773110] ? get_unmapped_area+0x1f5/0x3f0 [ 35.773721] do_mmap+0x854/0xf00 [ 35.774211] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.774766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.775392] ksys_mmap_pgoff+0x3af/0x500 [ 35.775961] do_syscall_64+0x3f/0x90 [ 35.776494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.777217] RIP: 0033:0x7f0b247c6d82 [ 35.777721] 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 [ 35.780117] RSP: 002b:00007fff61e9a9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.781129] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b247c6d82 [ 35.782073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b23c00000 [ 35.782998] RBP: 00007f0b23c00000 R08: 0000000000000009 R09: 0000000000001000 [ 35.783959] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589e7613d90 [ 35.784900] R13: 00007fff61e9a9c0 R14: 00007fff61e9a9f0 R15: 00007fff61e9ad50 [ 35.785858] [ 35.786180] [ 35.786415] Allocated by task 214: [ 35.786896] kasan_save_stack+0x22/0x50 [ 35.787461] kasan_set_track+0x25/0x30 [ 35.788030] __kasan_slab_alloc+0x59/0x70 [ 35.788613] kmem_cache_alloc+0x16b/0x370 [ 35.789190] vm_area_dup+0x20/0x160 [ 35.789696] __split_vma+0x170/0x950 [ 35.790217] split_vma+0xc6/0x110 [ 35.790703] mprotect_fixup+0x8d2/0xb30 [ 35.791260] do_mprotect_pkey+0x87e/0xd40 [ 35.791851] __x64_sys_mprotect+0x78/0xc0 [ 35.792431] do_syscall_64+0x3f/0x90 [ 35.792959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.793671] [ 35.793908] Freed by task 214: [ 35.794338] kasan_save_stack+0x22/0x50 [ 35.794905] kasan_set_track+0x25/0x30 [ 35.795451] kasan_save_free_info+0x2b/0x50 [ 35.796050] __kasan_slab_free+0x10a/0x190 [ 35.796645] kmem_cache_free+0x10d/0x4d0 [ 35.797210] rcu_core+0x8c8/0x2860 [ 35.797755] __do_softirq+0x1b7/0x7d4 [ 35.798291] [ 35.798531] Last potentially related work creation: [ 35.799179] kasan_save_stack+0x22/0x50 [ 35.799747] __kasan_record_aux_stack+0x8e/0xa0 [ 35.800393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.801105] remove_vma+0x139/0x170 [ 35.801607] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.802230] do_vmi_munmap+0x1f1/0x2b0 [ 35.802766] __vm_munmap+0x138/0x3a0 [ 35.803284] __x64_sys_munmap+0x59/0x80 [ 35.803840] do_syscall_64+0x3f/0x90 [ 35.804364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.805079] [ 35.805320] The buggy address belongs to the object at ffff8880099bbd98 [ 35.805320] which belongs to the cache vm_area_struct of size 168 [ 35.806961] The buggy address is located 88 bytes inside of [ 35.806961] freed 168-byte region [ffff8880099bbd98, ffff8880099bbe40) [ 35.808549] [ 35.808789] The buggy address belongs to the physical page: [ 35.809520] page:00000000b3379169 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99bb [ 35.810718] memcg:ffff88800c5fb601 [ 35.811193] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.811932] page_type: 0xffffffff() [ 35.812433] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.813462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5fb601 [ 35.814476] page dumped because: kasan: bad access detected [ 35.815212] [ 35.815451] Memory state around the buggy address: [ 35.816107] ffff8880099bbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.817062] ffff8880099bbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.818017] >ffff8880099bbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.818959] ^ [ 35.819877] ffff8880099bbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.820823] ffff8880099bbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.821767] ================================================================== [ 35.822869] Disabling lock debugging due to kernel taint [ 38.305164] BUG: Bad rss-counter state mm:0000000037aaa1f6 type:MM_FILEPAGES val:33 [ 38.306155] BUG: Bad rss-counter state mm:0000000037aaa1f6 type:MM_ANONPAGES val:22 [ 38.753171] BUG: Bad rss-counter state mm:0000000097e68c10 type:MM_FILEPAGES val:33 [ 38.754177] BUG: Bad rss-counter state mm:0000000097e68c10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30654' (ECDSA) to the list of known hosts. 2023/06/20 10:58:20 fuzzer started 2023/06/20 10:58:20 dialing manager at localhost:36067 2023/06/20 10:58:20 checking machine... 2023/06/20 10:58:20 checking revisions... [ 39.396106] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:58:20 testing simple program... [ 39.448895] cgroup: Unknown subsys name 'net' [ 39.491304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d5820 RDX=1ffff1100d9c1358 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff860d5824 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000010484 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=0000000000000005 R15=ffff88806ce09a78 RIP=ffffffff81130b54 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 00007f84644ad900 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=00007ffc8479e000 CR3=000000000e90c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001e163db RBX=ffff88800f0b1ea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f0b1eb8 RBP=ffff888019ef82a0 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888018ce4500 R14=ffffffff818c72a3 R15=ffff88800c8afd00 RIP=ffffffff818464b7 RFL=00000006 [-----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 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=00007f5682a7c000 CR3=000000000d446000 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=65b878032cef519b834da347f55f1195 XMM02=2c67c8bc2e329bc3000000000011b5e8 XMM03=fb795ef6d65770560000000000121ba0 XMM04=4f340dc48addcde800000000000ae988 XMM05=e4cb8bb95a7664b60000000000131758 XMM06=14be3c7d829b56820000000000130930 XMM07=e042d86d42eb936e0000000000121e20 XMM08=a2440b9e8e124fc9000000000011b648 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000