syzkaller login: [ 30.491376] BUG: Bad rss-counter state mm:00000000feacbfce type:MM_FILEPAGES val:33 [ 30.492652] BUG: Bad rss-counter state mm:00000000feacbfce type:MM_ANONPAGES val:22 [ 30.662033] ================================================================== [ 30.662928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.663984] Read of size 8 at addr ffff888016507df0 by task sshd/220 [ 30.664762] [ 30.665104] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.665966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.666951] Call Trace: [ 30.667310] [ 30.667595] dump_stack_lvl+0x91/0xf0 [ 30.668103] print_report+0xcc/0x620 [ 30.668593] ? __virt_addr_valid+0x102/0x340 [ 30.669148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.670382] kasan_report+0xbe/0xf0 [ 30.670856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.671491] vma_interval_tree_remove+0xc75/0xec0 [ 30.672089] vma_prepare+0xc54/0x11a0 [ 30.672561] __split_vma+0x5af/0x950 [ 30.673027] ? __pfx___split_vma+0x10/0x10 [ 30.673553] ? find_held_lock+0x2c/0x110 [ 30.674069] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.674635] ? lock_is_held_type+0x9f/0x120 [ 30.675188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.675799] ? mtree_range_walk+0x632/0x900 [ 30.676355] ? mas_walk+0x5c7/0x7c0 [ 30.676836] do_vmi_munmap+0x1f1/0x2b0 [ 30.677335] mmap_region+0x1f9/0x2660 [ 30.677818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.678327] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.679055] ? __pfx_lock_acquire+0x10/0x10 [ 30.679587] ? __pfx_mmap_region+0x10/0x10 [ 30.680109] ? security_mmap_addr+0x7d/0xa0 [ 30.680649] ? get_unmapped_area+0x1f5/0x3f0 [ 30.681194] do_mmap+0x854/0xf00 [ 30.681630] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.682120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.682679] ksys_mmap_pgoff+0x3af/0x500 [ 30.683202] do_syscall_64+0x3f/0x90 [ 30.683678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684318] RIP: 0033:0x7fc9d891ad82 [ 30.684783] 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 [ 30.686888] RSP: 002b:00007ffd9394c5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.687805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9d891ad82 [ 30.688656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9d7d54000 [ 30.689494] RBP: 00007fc9d7d54000 R08: 0000000000000009 R09: 0000000000001000 [ 30.690330] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574a043ef70 [ 30.691195] R13: 00007ffd9394c600 R14: 00007ffd9394c630 R15: 00007ffd9394c990 [ 30.692054] [ 30.692352] [ 30.692565] Allocated by task 213: [ 30.692987] kasan_save_stack+0x22/0x50 [ 30.693486] kasan_set_track+0x25/0x30 [ 30.693976] __kasan_slab_alloc+0x59/0x70 [ 30.694497] kmem_cache_alloc+0x16b/0x370 [ 30.695014] vm_area_dup+0x20/0x160 [ 30.695473] __split_vma+0x170/0x950 [ 30.695946] split_vma+0xc6/0x110 [ 30.696392] mprotect_fixup+0x8d2/0xb30 [ 30.696893] do_mprotect_pkey+0x87e/0xd40 [ 30.697418] __x64_sys_mprotect+0x78/0xc0 [ 30.697933] do_syscall_64+0x3f/0x90 [ 30.698409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699064] [ 30.699283] Freed by task 19: [ 30.699665] kasan_save_stack+0x22/0x50 [ 30.700164] kasan_set_track+0x25/0x30 [ 30.700659] kasan_save_free_info+0x2b/0x50 [ 30.701185] __kasan_slab_free+0x10a/0x190 [ 30.701708] kmem_cache_free+0x10d/0x4d0 [ 30.702214] rcu_core+0x8c8/0x2860 [ 30.702659] __do_softirq+0x1b7/0x7d4 [ 30.703183] [ 30.703401] Last potentially related work creation: [ 30.703998] kasan_save_stack+0x22/0x50 [ 30.704500] __kasan_record_aux_stack+0x8e/0xa0 [ 30.705070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.705720] remove_vma+0x139/0x170 [ 30.706166] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.706722] do_vmi_munmap+0x1f1/0x2b0 [ 30.707212] __vm_munmap+0x138/0x3a0 [ 30.707678] __x64_sys_munmap+0x59/0x80 [ 30.708169] do_syscall_64+0x3f/0x90 [ 30.708640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709277] [ 30.709491] The buggy address belongs to the object at ffff888016507d98 [ 30.709491] which belongs to the cache vm_area_struct of size 168 [ 30.710957] The buggy address is located 88 bytes inside of [ 30.710957] freed 168-byte region [ffff888016507d98, ffff888016507e40) [ 30.712380] [ 30.712598] The buggy address belongs to the physical page: [ 30.713263] page:00000000bae05759 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16507 [ 30.714362] memcg:ffff888019c40501 [ 30.714784] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.715455] page_type: 0xffffffff() [ 30.715904] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.716809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c40501 [ 30.717710] page dumped because: kasan: bad access detected [ 30.718371] [ 30.718590] Memory state around the buggy address: [ 30.719172] ffff888016507c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.720015] ffff888016507d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.720869] >ffff888016507d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.721720] ^ [ 30.722539] ffff888016507e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.723402] ffff888016507e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.724248] ================================================================== [ 30.725786] Disabling lock debugging due to kernel taint [ 32.634716] BUG: Bad rss-counter state mm:000000003880e4a0 type:MM_FILEPAGES val:33 [ 32.635833] BUG: Bad rss-counter state mm:000000003880e4a0 type:MM_ANONPAGES val:22 [ 33.128990] BUG: Bad rss-counter state mm:000000000c286776 type:MM_FILEPAGES val:33 [ 33.130033] BUG: Bad rss-counter state mm:000000000c286776 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28916' (ECDSA) to the list of known hosts. 2023/06/20 15:26:29 fuzzer started 2023/06/20 15:26:29 dialing manager at localhost:36067 2023/06/20 15:26:29 checking machine... 2023/06/20 15:26:29 checking revisions... [ 33.734210] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:26:29 testing simple program... [ 33.780389] cgroup: Unknown subsys name 'net' [ 33.820168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:26:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135f RSI=ffffffff846000aa RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801015d1c0 R15=ffff88806ce09a98 RIP=ffffffff81130682 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 00007fb25a587900 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=00007fb2599d4020 CR3=000000000c642000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=500b5ff43ec7b13f00000000000ae988 XMM05=4acf5435585011930000000000132768 XMM06=ee38641f02c654f60000000000131508 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e37a10 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37901 RSI=ffff888008e37948 RDI=ffff888008e37948 RBP=ffff888008e379d0 RSP=ffff888008e378b0 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37948 R15=ffff888008e37978 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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=00007ffd1a119000 CR3=000000001a166000 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