syzkaller login: [ 34.297994] BUG: Bad rss-counter state mm:0000000003eb9d6e type:MM_FILEPAGES val:33 [ 34.299069] BUG: Bad rss-counter state mm:0000000003eb9d6e type:MM_ANONPAGES val:22 [ 34.442979] ================================================================== [ 34.443882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.444817] Read of size 8 at addr ffff88801799b798 by task sshd/219 [ 34.445609] [ 34.445927] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.446849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.447823] Call Trace: [ 34.448143] [ 34.448443] dump_stack_lvl+0x91/0xf0 [ 34.448941] print_report+0xcc/0x620 [ 34.449424] ? __virt_addr_valid+0x102/0x340 [ 34.450005] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.450622] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.451234] kasan_report+0xbe/0xf0 [ 34.451710] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.452333] vma_interval_tree_remove+0xc75/0xec0 [ 34.452933] vma_prepare+0xc54/0x11a0 [ 34.453412] __split_vma+0x5af/0x950 [ 34.453902] ? __pfx___split_vma+0x10/0x10 [ 34.454436] ? find_held_lock+0x2c/0x110 [ 34.454970] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.455537] ? lock_is_held_type+0x9f/0x120 [ 34.456079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.456688] ? mtree_range_walk+0x632/0x900 [ 34.457238] ? mas_walk+0x5c7/0x7c0 [ 34.457719] do_vmi_munmap+0x1f1/0x2b0 [ 34.458209] mmap_region+0x1f9/0x2660 [ 34.458691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.459199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.459914] ? __pfx_lock_acquire+0x10/0x10 [ 34.460442] ? __pfx_mmap_region+0x10/0x10 [ 34.460977] ? security_mmap_addr+0x7d/0xa0 [ 34.461505] ? get_unmapped_area+0x1f5/0x3f0 [ 34.462077] do_mmap+0x854/0xf00 [ 34.462511] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.463011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.463573] ksys_mmap_pgoff+0x3af/0x500 [ 34.464078] do_syscall_64+0x3f/0x90 [ 34.464565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.465217] RIP: 0033:0x7f240f7c2d82 [ 34.465687] 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 [ 34.467820] RSP: 002b:00007ffd557845e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.468729] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f240f7c2d82 [ 34.469593] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f240ebfc000 [ 34.470440] RBP: 00007f240ebfc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.471296] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a93bdbf70 [ 34.472149] R13: 00007ffd55784600 R14: 00007ffd55784630 R15: 00007ffd55784990 [ 34.473013] [ 34.473308] [ 34.473544] Allocated by task 211: [ 34.473977] kasan_save_stack+0x22/0x50 [ 34.474484] kasan_set_track+0x25/0x30 [ 34.474977] __kasan_slab_alloc+0x59/0x70 [ 34.475506] kmem_cache_alloc+0x16b/0x370 [ 34.476029] vm_area_dup+0x20/0x160 [ 34.476481] __split_vma+0x170/0x950 [ 34.476952] split_vma+0xc6/0x110 [ 34.477398] mprotect_fixup+0x8d2/0xb30 [ 34.477917] do_mprotect_pkey+0x87e/0xd40 [ 34.478440] __x64_sys_mprotect+0x78/0xc0 [ 34.478968] do_syscall_64+0x3f/0x90 [ 34.479437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.480078] [ 34.480295] Freed by task 211: [ 34.480686] kasan_save_stack+0x22/0x50 [ 34.481188] kasan_set_track+0x25/0x30 [ 34.481694] kasan_save_free_info+0x2b/0x50 [ 34.482238] __kasan_slab_free+0x10a/0x190 [ 34.482771] kmem_cache_free+0x10d/0x4d0 [ 34.483286] rcu_core+0x8c8/0x2860 [ 34.483729] __do_softirq+0x1b7/0x7d4 [ 34.484202] [ 34.484422] Last potentially related work creation: [ 34.485011] kasan_save_stack+0x22/0x50 [ 34.485547] __kasan_record_aux_stack+0x8e/0xa0 [ 34.486163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.486835] remove_vma+0x139/0x170 [ 34.487375] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.487959] do_vmi_munmap+0x1f1/0x2b0 [ 34.488472] __vm_munmap+0x138/0x3a0 [ 34.488965] __x64_sys_munmap+0x59/0x80 [ 34.489485] do_syscall_64+0x3f/0x90 [ 34.489996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.490667] [ 34.490895] The buggy address belongs to the object at ffff88801799b740 [ 34.490895] which belongs to the cache vm_area_struct of size 168 [ 34.492448] The buggy address is located 88 bytes inside of [ 34.492448] freed 168-byte region [ffff88801799b740, ffff88801799b7e8) [ 34.493955] [ 34.494180] The buggy address belongs to the physical page: [ 34.494879] page:000000001743f31a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1799b [ 34.496033] memcg:ffff88801799c001 [ 34.496485] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.497220] page_type: 0xffffffff() [ 34.497716] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.498696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801799c001 [ 34.499654] page dumped because: kasan: bad access detected [ 34.500352] [ 34.500578] Memory state around the buggy address: [ 34.501190] ffff88801799b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.502105] ffff88801799b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.503001] >ffff88801799b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.503898] ^ [ 34.504418] ffff88801799b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.505318] ffff88801799b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.506239] ================================================================== [ 34.507197] Disabling lock debugging due to kernel taint [ 36.534639] BUG: Bad rss-counter state mm:0000000071c86892 type:MM_FILEPAGES val:33 [ 36.535377] BUG: Bad rss-counter state mm:0000000071c86892 type:MM_ANONPAGES val:22 [ 37.081674] BUG: Bad rss-counter state mm:00000000dc7b23b0 type:MM_FILEPAGES val:33 [ 37.083109] BUG: Bad rss-counter state mm:00000000dc7b23b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38847' (ECDSA) to the list of known hosts. 2023/06/19 13:23:53 fuzzer started 2023/06/19 13:23:54 dialing manager at localhost:44161 2023/06/19 13:23:54 checking machine... 2023/06/19 13:23:54 checking revisions... [ 37.722082] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:23:54 testing simple program... [ 37.772192] cgroup: Unknown subsys name 'net' [ 37.816893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:23:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863dcb4e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801416f4f0 RSP=ffff88801416f428 R8 =ffffffff863dcb52 R9 =ffff88801416f4d8 R10=0000000000038001 R11=0000000000091beb R12=ffff88801416f4f8 R13=ffff88801416f4e0 R14=ffff88801416f4d9 R15=ffff88801416f498 RIP=ffffffff81130ad3 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 00007f1e0b549900 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=00007fff93c9c000 CR3=000000001428c000 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=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=1ffff1100d9e1354 RSI=ffff88806cf09fb8 RDI=ffff88806cf09aa0 RBP=ffff88806cf09fb8 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88806cf09fb8 R15=ffff88806cf09a98 RIP=ffffffff81130445 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 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=00007fcc3eeb3850 CR3=000000000d6fe000 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=916c417faf4e18ac1348e98a162f5779 XMM02=000000000011dea8ec2efd57dc4c00df XMM03=00000000001244280fb0ee0ea4a360f3 XMM04=9d17d3a6d82e810b00000000000ae988 XMM05=dfcdbad4f1609c370000000000134788 XMM06=ab2c0744e95a855d00000000001335b8 XMM07=e042d86d42eb936e0000000000124700 XMM08=0fb0ee0ea4a360f3000000000011df08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000