syzkaller login: [ 30.434784] BUG: Bad rss-counter state mm:000000006ba3c478 type:MM_FILEPAGES val:33 [ 30.435752] BUG: Bad rss-counter state mm:000000006ba3c478 type:MM_ANONPAGES val:22 [ 30.547467] ================================================================== [ 30.548081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.548944] Read of size 8 at addr ffff88800f265968 by task sshd/221 [ 30.549534] [ 30.549697] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.550311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.550972] Call Trace: [ 30.551190] [ 30.551471] dump_stack_lvl+0x91/0xf0 [ 30.551833] print_report+0xcc/0x620 [ 30.552307] ? __virt_addr_valid+0x102/0x340 [ 30.552691] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.553102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.553503] kasan_report+0xbe/0xf0 [ 30.553866] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.554284] vma_interval_tree_remove+0xc75/0xec0 [ 30.554668] vma_prepare+0xc54/0x11a0 [ 30.554983] __split_vma+0x5af/0x950 [ 30.555323] ? __pfx___split_vma+0x10/0x10 [ 30.555704] ? find_held_lock+0x2c/0x110 [ 30.556113] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.556539] ? lock_is_held_type+0x9f/0x120 [ 30.556930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.557378] ? mtree_range_walk+0x632/0x900 [ 30.557786] ? mas_walk+0x5c7/0x7c0 [ 30.558107] do_vmi_munmap+0x1f1/0x2b0 [ 30.558438] mmap_region+0x1f9/0x2660 [ 30.558768] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.559149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.559671] ? __pfx_lock_acquire+0x10/0x10 [ 30.560027] ? __pfx_mmap_region+0x10/0x10 [ 30.560381] ? security_mmap_addr+0x7d/0xa0 [ 30.560745] ? get_unmapped_area+0x1f5/0x3f0 [ 30.561112] do_mmap+0x854/0xf00 [ 30.561417] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.561761] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.562133] ksys_mmap_pgoff+0x3af/0x500 [ 30.562525] do_syscall_64+0x3f/0x90 [ 30.562901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.563467] RIP: 0033:0x7f716b890d82 [ 30.563806] 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 [ 30.565580] RSP: 002b:00007fff418e2d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.566326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f716b890d82 [ 30.567044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f716acca000 [ 30.567773] RBP: 00007f716acca000 R08: 0000000000000009 R09: 0000000000001000 [ 30.568405] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556fe664d90 [ 30.568943] R13: 00007fff418e2d60 R14: 00007fff418e2d90 R15: 00007fff418e30f0 [ 30.569504] [ 30.569700] [ 30.569837] Allocated by task 214: [ 30.570116] kasan_save_stack+0x22/0x50 [ 30.570465] kasan_set_track+0x25/0x30 [ 30.570811] __kasan_slab_alloc+0x59/0x70 [ 30.571156] kmem_cache_alloc+0x16b/0x370 [ 30.571493] vm_area_dup+0x20/0x160 [ 30.571782] __split_vma+0x170/0x950 [ 30.572072] split_vma+0xc6/0x110 [ 30.572336] mprotect_fixup+0x8d2/0xb30 [ 30.572648] do_mprotect_pkey+0x87e/0xd40 [ 30.572960] __x64_sys_mprotect+0x78/0xc0 [ 30.573289] do_syscall_64+0x3f/0x90 [ 30.573612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.574036] [ 30.574170] Freed by task 214: [ 30.574426] kasan_save_stack+0x22/0x50 [ 30.574736] kasan_set_track+0x25/0x30 [ 30.575040] kasan_save_free_info+0x2b/0x50 [ 30.575425] __kasan_slab_free+0x10a/0x190 [ 30.575777] kmem_cache_free+0x10d/0x4d0 [ 30.576116] rcu_core+0x8c8/0x2860 [ 30.576398] __do_softirq+0x1b7/0x7d4 [ 30.576725] [ 30.576860] Last potentially related work creation: [ 30.577212] kasan_save_stack+0x22/0x50 [ 30.577519] __kasan_record_aux_stack+0x8e/0xa0 [ 30.577850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.578230] remove_vma+0x139/0x170 [ 30.578500] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.578858] do_vmi_munmap+0x1f1/0x2b0 [ 30.579162] __vm_munmap+0x138/0x3a0 [ 30.579486] __x64_sys_munmap+0x59/0x80 [ 30.579787] do_syscall_64+0x3f/0x90 [ 30.580077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580471] [ 30.580601] The buggy address belongs to the object at ffff88800f265910 [ 30.580601] which belongs to the cache vm_area_struct of size 168 [ 30.581528] The buggy address is located 88 bytes inside of [ 30.581528] freed 168-byte region [ffff88800f265910, ffff88800f2659b8) [ 30.582402] [ 30.582543] The buggy address belongs to the physical page: [ 30.582968] page:00000000c944a573 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf265 [ 30.583660] memcg:ffff88800eea5d01 [ 30.583921] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.584346] page_type: 0xffffffff() [ 30.584621] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.585181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eea5d01 [ 30.585734] page dumped because: kasan: bad access detected [ 30.586136] [ 30.586267] Memory state around the buggy address: [ 30.586636] ffff88800f265800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.587151] ffff88800f265880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.587725] >ffff88800f265900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.588242] ^ [ 30.588747] ffff88800f265980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.589297] ffff88800f265a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.589827] ================================================================== [ 30.590575] Disabling lock debugging due to kernel taint [ 31.923760] BUG: Bad rss-counter state mm:00000000f14d312a type:MM_FILEPAGES val:33 [ 31.924882] BUG: Bad rss-counter state mm:00000000f14d312a type:MM_ANONPAGES val:22 [ 32.299385] BUG: Bad rss-counter state mm:00000000658d34b6 type:MM_FILEPAGES val:33 [ 32.300112] BUG: Bad rss-counter state mm:00000000658d34b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12887' (ECDSA) to the list of known hosts. 2023/06/21 09:49:08 fuzzer started 2023/06/21 09:49:08 dialing manager at localhost:36067 2023/06/21 09:49:08 checking machine... 2023/06/21 09:49:08 checking revisions... [ 32.864326] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:49:08 testing simple program... [ 32.895678] cgroup: Unknown subsys name 'net' [ 32.943666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:08 Registers: info registers vcpu 0 RAX=ffffffff86073d0d RBX=0000000000000001 RCX=ffffffff86073d08 RDX=0000000000000000 RSI=1ffffffff0c0e7a1 RDI=ffffffff85d7a9c4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86073d08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a5b RFL=00000213 [----A-C] 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=00007fffdb4ada68 CR3=000000001a4c2000 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=2038303a39343a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39343a3930203132 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888018dc1700 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800ebf51c0 RSI=ffffffff836326eb RDI=ffff888018dc17e0 RBP=0000000000000010 RSP=ffff88801681fe18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000003 R13=0000000000000009 R14=ffff888018dc1700 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000286 [--S--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 00007efe877d9900 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=00007efe87d910b0 CR3=000000000ea76000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000