syzkaller login: [ 32.501181] BUG: Bad rss-counter state mm:000000006c673cfd type:MM_FILEPAGES val:33 [ 32.502196] BUG: Bad rss-counter state mm:000000006c673cfd type:MM_ANONPAGES val:22 [ 32.670309] ================================================================== [ 32.671428] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.672572] Read of size 8 at addr ffff888016a1b6b0 by task sshd/221 [ 32.673622] [ 32.673850] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.674729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.675729] Call Trace: [ 32.676049] [ 32.676343] dump_stack_lvl+0x91/0xf0 [ 32.676850] print_report+0xcc/0x620 [ 32.677339] ? __virt_addr_valid+0x102/0x340 [ 32.677890] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.678499] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.679137] kasan_report+0xbe/0xf0 [ 32.679616] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.680234] vma_interval_tree_remove+0xc75/0xec0 [ 32.680843] vma_prepare+0xc54/0x11a0 [ 32.681323] __split_vma+0x5af/0x950 [ 32.681797] ? __pfx___split_vma+0x10/0x10 [ 32.682327] ? find_held_lock+0x2c/0x110 [ 32.682853] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.683421] ? lock_is_held_type+0x9f/0x120 [ 32.683960] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.684570] ? mtree_range_walk+0x632/0x900 [ 32.685148] ? mas_walk+0x5c7/0x7c0 [ 32.685623] do_vmi_munmap+0x1f1/0x2b0 [ 32.686136] mmap_region+0x1f9/0x2660 [ 32.686623] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.687142] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.687860] ? __pfx_lock_acquire+0x10/0x10 [ 32.688401] ? __pfx_mmap_region+0x10/0x10 [ 32.688942] ? security_mmap_addr+0x7d/0xa0 [ 32.689472] ? get_unmapped_area+0x1f5/0x3f0 [ 32.690023] do_mmap+0x854/0xf00 [ 32.690474] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.690979] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.691544] ksys_mmap_pgoff+0x3af/0x500 [ 32.692057] do_syscall_64+0x3f/0x90 [ 32.692533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.693209] RIP: 0033:0x7efe6b9a8d82 [ 32.693667] 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 [ 32.695802] RSP: 002b:00007ffec55b0878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.696706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe6b9a8d82 [ 32.697571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe6ade2000 [ 32.698435] RBP: 00007efe6ade2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.699293] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ccea60f70 [ 32.700151] R13: 00007ffec55b0890 R14: 00007ffec55b08c0 R15: 00007ffec55b0c20 [ 32.701046] [ 32.701352] [ 32.701568] Allocated by task 214: [ 32.702003] kasan_save_stack+0x22/0x50 [ 32.702519] kasan_set_track+0x25/0x30 [ 32.703024] __kasan_slab_alloc+0x59/0x70 [ 32.703558] kmem_cache_alloc+0x16b/0x370 [ 32.704073] vm_area_dup+0x20/0x160 [ 32.704530] __split_vma+0x170/0x950 [ 32.705013] split_vma+0xc6/0x110 [ 32.705458] mprotect_fixup+0x8d2/0xb30 [ 32.705967] do_mprotect_pkey+0x87e/0xd40 [ 32.706493] __x64_sys_mprotect+0x78/0xc0 [ 32.707023] do_syscall_64+0x3f/0x90 [ 32.707502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.708156] [ 32.708371] Freed by task 211: [ 32.708772] kasan_save_stack+0x22/0x50 [ 32.709275] kasan_set_track+0x25/0x30 [ 32.709769] kasan_save_free_info+0x2b/0x50 [ 32.710308] __kasan_slab_free+0x10a/0x190 [ 32.710845] kmem_cache_free+0x10d/0x4d0 [ 32.711356] rcu_core+0x8c8/0x2860 [ 32.711802] __do_softirq+0x1b7/0x7d4 [ 32.712284] [ 32.712499] Last potentially related work creation: [ 32.713104] kasan_save_stack+0x22/0x50 [ 32.713620] __kasan_record_aux_stack+0x8e/0xa0 [ 32.714196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.714874] remove_vma+0x139/0x170 [ 32.715326] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.715883] do_vmi_munmap+0x1f1/0x2b0 [ 32.716377] __vm_munmap+0x138/0x3a0 [ 32.716871] __x64_sys_munmap+0x59/0x80 [ 32.717368] do_syscall_64+0x3f/0x90 [ 32.717844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.718488] [ 32.718706] The buggy address belongs to the object at ffff888016a1b658 [ 32.718706] which belongs to the cache vm_area_struct of size 168 [ 32.720177] The buggy address is located 88 bytes inside of [ 32.720177] freed 168-byte region [ffff888016a1b658, ffff888016a1b700) [ 32.721607] [ 32.721825] The buggy address belongs to the physical page: [ 32.722485] page:00000000a58551e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a1b [ 32.723582] memcg:ffff888018c69f01 [ 32.724016] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.724660] page_type: 0xffffffff() [ 32.725127] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.726051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c69f01 [ 32.726953] page dumped because: kasan: bad access detected [ 32.727615] [ 32.727829] Memory state around the buggy address: [ 32.728412] ffff888016a1b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.729300] ffff888016a1b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.730155] >ffff888016a1b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.731015] ^ [ 32.731601] ffff888016a1b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.732469] ffff888016a1b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.733343] ================================================================== [ 32.734271] Disabling lock debugging due to kernel taint [ 35.623428] BUG: Bad rss-counter state mm:0000000055970132 type:MM_FILEPAGES val:33 [ 35.624625] BUG: Bad rss-counter state mm:0000000055970132 type:MM_ANONPAGES val:22 [ 36.096035] BUG: Bad rss-counter state mm:00000000cca136af type:MM_FILEPAGES val:33 [ 36.097185] BUG: Bad rss-counter state mm:00000000cca136af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38542' (ECDSA) to the list of known hosts. 2023/06/19 22:05:33 fuzzer started 2023/06/19 22:05:34 dialing manager at localhost:44161 2023/06/19 22:05:34 checking machine... 2023/06/19 22:05:34 checking revisions... [ 36.723164] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:05:34 testing simple program... [ 36.771743] cgroup: Unknown subsys name 'net' [ 36.821910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:05:32 Registers: info registers vcpu 0 RAX=000000000000000b RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000dc0 RSI=000000000000000b RDI=ffff88800e837888 RBP=ffff8880087b6780 RSP=ffff88800e8377c8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88800e837830 R15=0000000000000dc0 RIP=ffffffff82270e34 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 00007f9f303f4900 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=00007ffd1de47000 CR3=0000000018f5a000 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=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=00007fb9a67a2640 CR3=000000000c47c000 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=dfca73ed6e0e739f0d42c44a726c4c15 XMM02=ec2efd57dc4c00df000000000011f858 XMM03=b3306f3f89f04c8a000000000011f928 XMM04=17fd4e9f599f873400000000000ae988 XMM05=e4cb8bb95a7664b60000000000133bf8 XMM06=aec05247795651ab0000000000132a60 XMM07=e042d86d42eb936e00000000001242e8 XMM08=b3306f3f89f04c8a000000000011f928 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000