syzkaller login: [ 44.380549] BUG: Bad rss-counter state mm:00000000da3f2b64 type:MM_FILEPAGES val:33 [ 44.382080] BUG: Bad rss-counter state mm:00000000da3f2b64 type:MM_ANONPAGES val:22 [ 44.536657] ================================================================== [ 44.537624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.538554] Read of size 8 at addr ffff88800c5fd4e0 by task sshd/219 [ 44.539418] [ 44.539638] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.540506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.541479] Call Trace: [ 44.541798] [ 44.542079] dump_stack_lvl+0x91/0xf0 [ 44.542562] print_report+0xcc/0x620 [ 44.543050] ? __virt_addr_valid+0x102/0x340 [ 44.543604] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.544226] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.544835] kasan_report+0xbe/0xf0 [ 44.545304] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.545922] vma_interval_tree_remove+0xc75/0xec0 [ 44.546521] vma_prepare+0xc54/0x11a0 [ 44.547002] __split_vma+0x5af/0x950 [ 44.547468] ? __pfx___split_vma+0x10/0x10 [ 44.548008] ? find_held_lock+0x2c/0x110 [ 44.548530] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.549097] ? lock_is_held_type+0x9f/0x120 [ 44.549627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.550239] ? mtree_range_walk+0x632/0x900 [ 44.550791] ? mas_walk+0x5c7/0x7c0 [ 44.551261] do_vmi_munmap+0x1f1/0x2b0 [ 44.551754] mmap_region+0x1f9/0x2660 [ 44.552247] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.552761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.553480] ? __pfx_lock_acquire+0x10/0x10 [ 44.554006] ? __pfx_mmap_region+0x10/0x10 [ 44.554537] ? security_mmap_addr+0x7d/0xa0 [ 44.555060] ? get_unmapped_area+0x1f5/0x3f0 [ 44.555619] do_mmap+0x854/0xf00 [ 44.556074] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.556564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.557118] ksys_mmap_pgoff+0x3af/0x500 [ 44.557624] do_syscall_64+0x3f/0x90 [ 44.558101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.558749] RIP: 0033:0x7fde0bcedd82 [ 44.559210] 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 [ 44.561340] RSP: 002b:00007fff25bf84b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.562262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde0bcedd82 [ 44.563107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde0b127000 [ 44.563946] RBP: 00007fde0b127000 R08: 0000000000000009 R09: 0000000000001000 [ 44.564820] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d49d538980 [ 44.565661] R13: 00007fff25bf84d0 R14: 00007fff25bf8500 R15: 00007fff25bf8860 [ 44.566516] [ 44.566806] [ 44.567023] Allocated by task 212: [ 44.567440] kasan_save_stack+0x22/0x50 [ 44.567948] kasan_set_track+0x25/0x30 [ 44.568458] __kasan_slab_alloc+0x59/0x70 [ 44.568977] kmem_cache_alloc+0x16b/0x370 [ 44.569490] vm_area_dup+0x20/0x160 [ 44.569943] __split_vma+0x170/0x950 [ 44.570414] split_vma+0xc6/0x110 [ 44.570843] mprotect_fixup+0x8d2/0xb30 [ 44.571341] do_mprotect_pkey+0x87e/0xd40 [ 44.571870] __x64_sys_mprotect+0x78/0xc0 [ 44.572396] do_syscall_64+0x3f/0x90 [ 44.572862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.573512] [ 44.573735] Freed by task 212: [ 44.574122] kasan_save_stack+0x22/0x50 [ 44.574633] kasan_set_track+0x25/0x30 [ 44.575115] kasan_save_free_info+0x2b/0x50 [ 44.575644] __kasan_slab_free+0x10a/0x190 [ 44.576198] kmem_cache_free+0x10d/0x4d0 [ 44.576706] rcu_core+0x8c8/0x2860 [ 44.577149] __do_softirq+0x1b7/0x7d4 [ 44.577615] [ 44.577831] Last potentially related work creation: [ 44.578416] kasan_save_stack+0x22/0x50 [ 44.578909] __kasan_record_aux_stack+0x8e/0xa0 [ 44.579479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.580137] remove_vma+0x139/0x170 [ 44.580590] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.581156] do_vmi_munmap+0x1f1/0x2b0 [ 44.581640] __vm_munmap+0x138/0x3a0 [ 44.582103] __x64_sys_munmap+0x59/0x80 [ 44.582599] do_syscall_64+0x3f/0x90 [ 44.583072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.583728] [ 44.583942] The buggy address belongs to the object at ffff88800c5fd488 [ 44.583942] which belongs to the cache vm_area_struct of size 168 [ 44.585446] The buggy address is located 88 bytes inside of [ 44.585446] freed 168-byte region [ffff88800c5fd488, ffff88800c5fd530) [ 44.586851] [ 44.587062] The buggy address belongs to the physical page: [ 44.587719] page:00000000279b8df9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5fd [ 44.588810] memcg:ffff888019fc3701 [ 44.589231] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.589878] page_type: 0xffffffff() [ 44.590334] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.591249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fc3701 [ 44.592169] page dumped because: kasan: bad access detected [ 44.592829] [ 44.593036] Memory state around the buggy address: [ 44.593618] ffff88800c5fd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.594472] ffff88800c5fd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 44.595334] >ffff88800c5fd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.596191] ^ [ 44.596921] ffff88800c5fd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 44.597774] ffff88800c5fd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.598628] ================================================================== [ 44.599601] Disabling lock debugging due to kernel taint [ 46.910995] BUG: Bad rss-counter state mm:0000000065d9d9c1 type:MM_FILEPAGES val:33 [ 46.912131] BUG: Bad rss-counter state mm:0000000065d9d9c1 type:MM_ANONPAGES val:22 [ 47.456174] BUG: Bad rss-counter state mm:00000000a07acbcb type:MM_FILEPAGES val:33 [ 47.457338] BUG: Bad rss-counter state mm:00000000a07acbcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47718' (ECDSA) to the list of known hosts. 2023/06/19 16:59:53 fuzzer started 2023/06/19 16:59:53 dialing manager at localhost:44161 2023/06/19 16:59:53 checking machine... 2023/06/19 16:59:53 checking revisions... [ 48.109177] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:59:53 testing simple program... [ 48.171211] cgroup: Unknown subsys name 'net' [ 48.216810] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:59:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f225ec28010 CR3=000000000e190000 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=2033353a39353a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a39353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110011d2e06 RBX=ffff888008e97000 RCX=0000000000000000 RDX=ffff88800f15b680 RSI=0000000000000009 RDI=0000000000000005 RBP=0000000000000040 RSP=ffff888014517870 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019e82b40 R14=1ffff110011d2e71 R15=ffff88800c9f4900 RIP=ffffffff83874031 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 00007fc3db067900 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=00007fff89227000 CR3=00000000181d0000 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=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