syzkaller login: [ 31.380169] BUG: Bad rss-counter state mm:00000000dea77577 type:MM_FILEPAGES val:33 [ 31.380873] BUG: Bad rss-counter state mm:00000000dea77577 type:MM_ANONPAGES val:22 [ 31.482781] ================================================================== [ 31.483504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.484135] Read of size 8 at addr ffff888014221310 by task sshd/221 [ 31.484641] [ 31.484801] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.485400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.486037] Call Trace: [ 31.486247] [ 31.486428] dump_stack_lvl+0x91/0xf0 [ 31.486752] print_report+0xcc/0x620 [ 31.487082] ? __virt_addr_valid+0x102/0x340 [ 31.487781] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.488228] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.488656] kasan_report+0xbe/0xf0 [ 31.488972] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.489378] vma_interval_tree_remove+0xc75/0xec0 [ 31.489813] vma_prepare+0xc54/0x11a0 [ 31.490156] __split_vma+0x5af/0x950 [ 31.490470] ? __pfx___split_vma+0x10/0x10 [ 31.490820] ? find_held_lock+0x2c/0x110 [ 31.491184] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.491605] ? lock_is_held_type+0x9f/0x120 [ 31.492019] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.492416] ? mtree_range_walk+0x632/0x900 [ 31.492796] ? mas_walk+0x5c7/0x7c0 [ 31.493106] do_vmi_munmap+0x1f1/0x2b0 [ 31.493436] mmap_region+0x1f9/0x2660 [ 31.493768] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.494121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.494605] ? __pfx_lock_acquire+0x10/0x10 [ 31.494958] ? __pfx_mmap_region+0x10/0x10 [ 31.495303] ? security_mmap_addr+0x7d/0xa0 [ 31.495710] ? get_unmapped_area+0x1f5/0x3f0 [ 31.496089] do_mmap+0x854/0xf00 [ 31.496391] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.496733] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.497127] ksys_mmap_pgoff+0x3af/0x500 [ 31.497468] do_syscall_64+0x3f/0x90 [ 31.497792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498247] RIP: 0033:0x7fed5372fd82 [ 31.498569] 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 [ 31.500074] RSP: 002b:00007ffe4055bc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.500658] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed5372fd82 [ 31.501265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed52b69000 [ 31.501854] RBP: 00007fed52b69000 R08: 0000000000000009 R09: 0000000000001000 [ 31.502467] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a7ef51f60 [ 31.503057] R13: 00007ffe4055bc20 R14: 00007ffe4055bc50 R15: 00007ffe4055bfb0 [ 31.503671] [ 31.503863] [ 31.503999] Allocated by task 214: [ 31.504274] kasan_save_stack+0x22/0x50 [ 31.504617] kasan_set_track+0x25/0x30 [ 31.504953] __kasan_slab_alloc+0x59/0x70 [ 31.505307] kmem_cache_alloc+0x16b/0x370 [ 31.505641] vm_area_dup+0x20/0x160 [ 31.505937] __split_vma+0x170/0x950 [ 31.506237] split_vma+0xc6/0x110 [ 31.506522] mprotect_fixup+0x8d2/0xb30 [ 31.506869] do_mprotect_pkey+0x87e/0xd40 [ 31.507257] __x64_sys_mprotect+0x78/0xc0 [ 31.507651] do_syscall_64+0x3f/0x90 [ 31.507986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.508408] [ 31.508546] Freed by task 13: [ 31.508797] kasan_save_stack+0x22/0x50 [ 31.509167] kasan_set_track+0x25/0x30 [ 31.509486] kasan_save_free_info+0x2b/0x50 [ 31.509832] __kasan_slab_free+0x10a/0x190 [ 31.510179] kmem_cache_free+0x10d/0x4d0 [ 31.510529] rcu_core+0x8c8/0x2860 [ 31.510839] __do_softirq+0x1b7/0x7d4 [ 31.511161] [ 31.511311] Last potentially related work creation: [ 31.511756] kasan_save_stack+0x22/0x50 [ 31.512124] __kasan_record_aux_stack+0x8e/0xa0 [ 31.512498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.512911] remove_vma+0x139/0x170 [ 31.513213] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.513569] do_vmi_munmap+0x1f1/0x2b0 [ 31.513896] __vm_munmap+0x138/0x3a0 [ 31.514229] __x64_sys_munmap+0x59/0x80 [ 31.514547] do_syscall_64+0x3f/0x90 [ 31.514902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.515346] [ 31.515545] The buggy address belongs to the object at ffff8880142212b8 [ 31.515545] which belongs to the cache vm_area_struct of size 168 [ 31.516582] The buggy address is located 88 bytes inside of [ 31.516582] freed 168-byte region [ffff8880142212b8, ffff888014221360) [ 31.517493] [ 31.517630] The buggy address belongs to the physical page: [ 31.518064] page:00000000b6df3c3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14221 [ 31.518770] memcg:ffff888016c2b201 [ 31.519043] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.519498] page_type: 0xffffffff() [ 31.519798] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.520400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c2b201 [ 31.521016] page dumped because: kasan: bad access detected [ 31.521458] [ 31.521602] Memory state around the buggy address: [ 31.521989] ffff888014221200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.522540] ffff888014221280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.523092] >ffff888014221300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.523669] ^ [ 31.523971] ffff888014221380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.524515] ffff888014221400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.525073] ================================================================== [ 31.525734] Disabling lock debugging due to kernel taint [ 33.407955] BUG: Bad rss-counter state mm:000000002cffa19c type:MM_FILEPAGES val:33 [ 33.408646] BUG: Bad rss-counter state mm:000000002cffa19c type:MM_ANONPAGES val:22 [ 33.829992] BUG: Bad rss-counter state mm:000000008f6f9279 type:MM_FILEPAGES val:33 [ 33.830662] BUG: Bad rss-counter state mm:000000008f6f9279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50090' (ECDSA) to the list of known hosts. 2023/06/21 09:49:28 fuzzer started 2023/06/21 09:49:28 dialing manager at localhost:36067 2023/06/21 09:49:28 checking machine... 2023/06/21 09:49:28 checking revisions... [ 34.354134] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:49:28 testing simple program... [ 34.386349] cgroup: Unknown subsys name 'net' [ 34.433502] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888018e091a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856d84b8 RBP=ffffffff856d84a0 RSP=ffff888015b87d20 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6d7d R12=0000000000000287 R13=ffffea0000638200 R14=ffffffff813782f8 R15=ffff88800dbe3a00 RIP=ffffffff812d8e60 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc5a8c03900 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=00007fc5a91ba618 CR3=000000001ca86000 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=00000000000000000000000000000000 XMM01=00000000000000ffffffffffff00ff00 XMM02=0000000000000000ffffffffff000000 XMM03=f54b8302f5309100322e322e302e3031 XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f73efb1c6f0 CR3=000000000d66c000 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=4e7eb13f31e39f81fb41920bda92cbc7 XMM02=2c67c8bc2e329bc3000000000011a970 XMM03=fb795ef6d65770560000000000121ee8 XMM04=ec315bef512194a700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131db0 XMM06=c291bd5c70af25b90000000000131c38 XMM07=e042d86d42eb936e0000000000122168 XMM08=ea4c62d8c426fcc2000000000011a9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000