syzkaller login: [ 30.989516] BUG: Bad rss-counter state mm:000000002b10a0dd type:MM_FILEPAGES val:33 [ 30.990553] BUG: Bad rss-counter state mm:000000002b10a0dd type:MM_ANONPAGES val:22 [ 31.156624] ================================================================== [ 31.157717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.158891] Read of size 8 at addr ffff888016b95880 by task sshd/220 [ 31.159851] [ 31.160106] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.161148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.162304] Call Trace: [ 31.162678] [ 31.163026] dump_stack_lvl+0x91/0xf0 [ 31.163644] print_report+0xcc/0x620 [ 31.164210] ? __virt_addr_valid+0x102/0x340 [ 31.164860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.165578] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.166294] kasan_report+0xbe/0xf0 [ 31.166860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167614] vma_interval_tree_remove+0xc75/0xec0 [ 31.168313] vma_prepare+0xc54/0x11a0 [ 31.168878] __split_vma+0x5af/0x950 [ 31.169437] ? __pfx___split_vma+0x10/0x10 [ 31.170062] ? find_held_lock+0x2c/0x110 [ 31.170673] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.171351] ? lock_is_held_type+0x9f/0x120 [ 31.172005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.172730] ? mtree_range_walk+0x632/0x900 [ 31.173385] ? mas_walk+0x5c7/0x7c0 [ 31.173950] do_vmi_munmap+0x1f1/0x2b0 [ 31.174531] mmap_region+0x1f9/0x2660 [ 31.175087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.175721] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.176563] ? __pfx_lock_acquire+0x10/0x10 [ 31.177195] ? __pfx_mmap_region+0x10/0x10 [ 31.177822] ? security_mmap_addr+0x7d/0xa0 [ 31.178448] ? get_unmapped_area+0x1f5/0x3f0 [ 31.179095] do_mmap+0x854/0xf00 [ 31.179626] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.180210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.180876] ksys_mmap_pgoff+0x3af/0x500 [ 31.181475] do_syscall_64+0x3f/0x90 [ 31.182037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182803] RIP: 0033:0x7f04ed2f7d82 [ 31.183407] 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 [ 31.185942] RSP: 002b:00007ffea03f6d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04ed2f7d82 [ 31.188040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04ec731000 [ 31.189030] RBP: 00007f04ec731000 R08: 0000000000000009 R09: 0000000000001000 [ 31.190050] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634cd121b20 [ 31.191020] R13: 00007ffea03f6db0 R14: 00007ffea03f6de0 R15: 00007ffea03f7140 [ 31.191987] [ 31.192324] [ 31.192571] Allocated by task 213: [ 31.193074] kasan_save_stack+0x22/0x50 [ 31.193667] kasan_set_track+0x25/0x30 [ 31.194244] __kasan_slab_alloc+0x59/0x70 [ 31.194842] kmem_cache_alloc+0x16b/0x370 [ 31.195433] vm_area_dup+0x20/0x160 [ 31.195966] __split_vma+0x170/0x950 [ 31.196491] split_vma+0xc6/0x110 [ 31.196989] mprotect_fixup+0x8d2/0xb30 [ 31.197559] do_mprotect_pkey+0x87e/0xd40 [ 31.198144] __x64_sys_mprotect+0x78/0xc0 [ 31.198734] do_syscall_64+0x3f/0x90 [ 31.199271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200021] [ 31.200265] Freed by task 213: [ 31.200708] kasan_save_stack+0x22/0x50 [ 31.201279] kasan_set_track+0x25/0x30 [ 31.201835] kasan_save_free_info+0x2b/0x50 [ 31.202443] __kasan_slab_free+0x10a/0x190 [ 31.203055] kmem_cache_free+0x10d/0x4d0 [ 31.203645] rcu_core+0x8c8/0x2860 [ 31.204167] __do_softirq+0x1b7/0x7d4 [ 31.204726] [ 31.204975] Last potentially related work creation: [ 31.205660] kasan_save_stack+0x22/0x50 [ 31.206247] __kasan_record_aux_stack+0x8e/0xa0 [ 31.206911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.207681] remove_vma+0x139/0x170 [ 31.208206] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.208853] do_vmi_munmap+0x1f1/0x2b0 [ 31.209409] __vm_munmap+0x138/0x3a0 [ 31.209948] __x64_sys_munmap+0x59/0x80 [ 31.210519] do_syscall_64+0x3f/0x90 [ 31.211076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211831] [ 31.212080] The buggy address belongs to the object at ffff888016b95828 [ 31.212080] which belongs to the cache vm_area_struct of size 168 [ 31.213798] The buggy address is located 88 bytes inside of [ 31.213798] freed 168-byte region [ffff888016b95828, ffff888016b958d0) [ 31.215427] [ 31.215681] The buggy address belongs to the physical page: [ 31.216446] page:00000000385f633b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b95 [ 31.217704] memcg:ffff88800d2bcd01 [ 31.218198] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.218939] page_type: 0xffffffff() [ 31.219455] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a2440 dead000000000002 [ 31.220561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2bcd01 [ 31.221569] page dumped because: kasan: bad access detected [ 31.222312] [ 31.222552] Memory state around the buggy address: [ 31.223204] ffff888016b95780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.224177] ffff888016b95800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.225136] >ffff888016b95880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.226097] ^ [ 31.226567] ffff888016b95900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.227529] ffff888016b95980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.228489] ================================================================== [ 31.229651] Disabling lock debugging due to kernel taint [ 33.110752] BUG: Bad rss-counter state mm:00000000d4ad4105 type:MM_FILEPAGES val:33 [ 33.112510] BUG: Bad rss-counter state mm:00000000d4ad4105 type:MM_ANONPAGES val:22 [ 33.601121] BUG: Bad rss-counter state mm:000000005f3fb961 type:MM_FILEPAGES val:33 [ 33.602405] BUG: Bad rss-counter state mm:000000005f3fb961 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2157' (ECDSA) to the list of known hosts. 2023/06/20 22:36:07 fuzzer started 2023/06/20 22:36:07 dialing manager at localhost:36067 2023/06/20 22:36:07 checking machine... 2023/06/20 22:36:07 checking revisions... [ 34.364940] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:36:07 testing simple program... [ 34.416209] cgroup: Unknown subsys name 'net' [ 34.465861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:07 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000b14edd89 RCX=ffff88806cb6ec48 RDX=0000000000000010 RSI=0000000000000002 RDI=00000000947496e2 RBP=ffff88800961cd50 RSP=ffff888016fbf4b8 R8 =000000009d3351c4 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016fbf520 R15=0000000000000010 RIP=ffffffff822704d3 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 00007f4d0da21900 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=00007ffdcd346000 CR3=00000000180a6000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007fc79a2cfec0 CR3=000000000960a000 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=58d49d5faa324b8e1d49b975567db29f XMM02=000000000011a0a8eff9b2d0a8fce9cb XMM03=000000000011a1782c67c8bc2e329bc3 XMM04=734c95c4d0211fb600000000000ae988 XMM05=19e9129bd510f2350000000000131740 XMM06=d7408619bb35ee1800000000001305a8 XMM07=e042d86d42eb936e0000000000121c08 XMM08=b4a8b25ba3b60216000000000011a178 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000