syzkaller login: [ 32.354777] BUG: Bad rss-counter state mm:00000000dce825dc type:MM_FILEPAGES val:33 [ 32.356278] BUG: Bad rss-counter state mm:00000000dce825dc type:MM_ANONPAGES val:22 [ 32.527723] ================================================================== [ 32.528657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.529632] Read of size 8 at addr ffff888019faa4e0 by task sshd/226 [ 32.530491] [ 32.530709] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.531579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.532552] Call Trace: [ 32.532870] [ 32.533177] dump_stack_lvl+0x91/0xf0 [ 32.533696] print_report+0xcc/0x620 [ 32.534184] ? __virt_addr_valid+0x102/0x340 [ 32.534748] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.535375] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.535984] kasan_report+0xbe/0xf0 [ 32.536474] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.537098] vma_interval_tree_remove+0xc75/0xec0 [ 32.537735] vma_prepare+0xc54/0x11a0 [ 32.538224] __split_vma+0x5af/0x950 [ 32.538711] ? __pfx___split_vma+0x10/0x10 [ 32.539241] ? find_held_lock+0x2c/0x110 [ 32.539842] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.540604] ? lock_is_held_type+0x9f/0x120 [ 32.541358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.542144] ? mtree_range_walk+0x632/0x900 [ 32.542760] ? mas_walk+0x5c7/0x7c0 [ 32.543235] do_vmi_munmap+0x1f1/0x2b0 [ 32.543762] mmap_region+0x1f9/0x2660 [ 32.544244] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.544846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.545589] ? __pfx_lock_acquire+0x10/0x10 [ 32.546120] ? __pfx_mmap_region+0x10/0x10 [ 32.546667] ? security_mmap_addr+0x7d/0xa0 [ 32.547196] ? get_unmapped_area+0x1f5/0x3f0 [ 32.547769] do_mmap+0x854/0xf00 [ 32.548207] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.548717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.549295] ksys_mmap_pgoff+0x3af/0x500 [ 32.549815] do_syscall_64+0x3f/0x90 [ 32.550297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.550969] RIP: 0033:0x7fea67a84d82 [ 32.551452] 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 [ 32.553611] RSP: 002b:00007fffca751d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.554540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea67a84d82 [ 32.555400] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea66ebe000 [ 32.556245] RBP: 00007fea66ebe000 R08: 0000000000000009 R09: 0000000000001000 [ 32.557120] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b8f8f8d90 [ 32.557989] R13: 00007fffca751d40 R14: 00007fffca751d70 R15: 00007fffca7520d0 [ 32.558853] [ 32.559147] [ 32.559374] Allocated by task 219: [ 32.559813] kasan_save_stack+0x22/0x50 [ 32.560328] kasan_set_track+0x25/0x30 [ 32.560831] __kasan_slab_alloc+0x59/0x70 [ 32.561375] kmem_cache_alloc+0x16b/0x370 [ 32.561911] vm_area_dup+0x20/0x160 [ 32.562377] __split_vma+0x170/0x950 [ 32.562863] split_vma+0xc6/0x110 [ 32.563312] mprotect_fixup+0x8d2/0xb30 [ 32.563855] do_mprotect_pkey+0x87e/0xd40 [ 32.564393] __x64_sys_mprotect+0x78/0xc0 [ 32.564922] do_syscall_64+0x3f/0x90 [ 32.565429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.566070] [ 32.566283] Freed by task 204: [ 32.566700] kasan_save_stack+0x22/0x50 [ 32.567205] kasan_set_track+0x25/0x30 [ 32.567713] kasan_save_free_info+0x2b/0x50 [ 32.568248] __kasan_slab_free+0x10a/0x190 [ 32.568795] kmem_cache_free+0x10d/0x4d0 [ 32.569316] rcu_core+0x8c8/0x2860 [ 32.569770] __do_softirq+0x1b7/0x7d4 [ 32.570244] [ 32.570495] Last potentially related work creation: [ 32.571075] kasan_save_stack+0x22/0x50 [ 32.571597] __kasan_record_aux_stack+0x8e/0xa0 [ 32.572178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.572833] remove_vma+0x139/0x170 [ 32.573316] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.573887] do_vmi_munmap+0x1f1/0x2b0 [ 32.574391] __vm_munmap+0x138/0x3a0 [ 32.574872] __x64_sys_munmap+0x59/0x80 [ 32.575372] do_syscall_64+0x3f/0x90 [ 32.575850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.576508] [ 32.576725] The buggy address belongs to the object at ffff888019faa488 [ 32.576725] which belongs to the cache vm_area_struct of size 168 [ 32.578212] The buggy address is located 88 bytes inside of [ 32.578212] freed 168-byte region [ffff888019faa488, ffff888019faa530) [ 32.579646] [ 32.579864] The buggy address belongs to the physical page: [ 32.580528] page:00000000a226fcb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19faa [ 32.581653] memcg:ffff88801a144f01 [ 32.582084] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.582752] page_type: 0xffffffff() [ 32.583196] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.584129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a144f01 [ 32.585045] page dumped because: kasan: bad access detected [ 32.585727] [ 32.585941] Memory state around the buggy address: [ 32.586543] ffff888019faa380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.587410] ffff888019faa400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.588254] >ffff888019faa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.589141] ^ [ 32.589917] ffff888019faa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.590800] ffff888019faa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.591671] ================================================================== [ 32.592664] Disabling lock debugging due to kernel taint [ 34.428695] BUG: Bad rss-counter state mm:0000000083defca0 type:MM_FILEPAGES val:33 [ 34.430115] BUG: Bad rss-counter state mm:0000000083defca0 type:MM_ANONPAGES val:22 [ 34.920546] BUG: Bad rss-counter state mm:000000007f4e15b7 type:MM_FILEPAGES val:33 [ 34.922053] BUG: Bad rss-counter state mm:000000007f4e15b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60311' (ECDSA) to the list of known hosts. 2023/06/19 11:09:48 fuzzer started 2023/06/19 11:09:49 dialing manager at localhost:44161 2023/06/19 11:09:49 checking machine... 2023/06/19 11:09:49 checking revisions... [ 35.663014] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:09:49 testing simple program... [ 35.703130] cgroup: Unknown subsys name 'net' [ 35.754353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff845136aa R14=ffffffff813782a8 R15=ffff888009730700 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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 00007f1e7c011900 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=00007f1e7c5c90b0 CR3=000000000d8fc000 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=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 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=00007ffcf5e27fa8 CR3=0000000006858000 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=2038343a39303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a39303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000