syzkaller login: [ 31.085225] BUG: Bad rss-counter state mm:00000000d220fe90 type:MM_FILEPAGES val:33 [ 31.086144] BUG: Bad rss-counter state mm:00000000d220fe90 type:MM_ANONPAGES val:22 [ 31.121579] ================================================================== [ 31.122460] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.123433] Read of size 8 at addr ffff888019b063f8 by task sshd/220 [ 31.124161] [ 31.124365] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.125237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.126202] Call Trace: [ 31.126539] <TASK> [ 31.126838] dump_stack_lvl+0x91/0xf0 [ 31.127306] print_report+0xcc/0x620 [ 31.127838] ? __virt_addr_valid+0x102/0x340 [ 31.128359] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.128957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.129596] kasan_report+0xbe/0xf0 [ 31.130095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130617] vma_interval_tree_remove+0xc75/0xec0 [ 31.131077] vma_prepare+0xc54/0x11a0 [ 31.131445] __split_vma+0x5af/0x950 [ 31.131806] ? __pfx___split_vma+0x10/0x10 [ 31.132265] ? find_held_lock+0x2c/0x110 [ 31.132743] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.133332] ? lock_is_held_type+0x9f/0x120 [ 31.133736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.134199] ? mtree_range_walk+0x632/0x900 [ 31.134616] ? mas_walk+0x5c7/0x7c0 [ 31.134980] do_vmi_munmap+0x1f1/0x2b0 [ 31.135349] mmap_region+0x1f9/0x2660 [ 31.135725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.136113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.136651] ? __pfx_lock_acquire+0x10/0x10 [ 31.137077] ? __pfx_mmap_region+0x10/0x10 [ 31.137477] ? security_mmap_addr+0x7d/0xa0 [ 31.137884] ? get_unmapped_area+0x1f5/0x3f0 [ 31.138306] do_mmap+0x854/0xf00 [ 31.138629] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.139015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.139434] ksys_mmap_pgoff+0x3af/0x500 [ 31.139828] do_syscall_64+0x3f/0x90 [ 31.140197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.140690] RIP: 0033:0x7fb6ca1e7d82 [ 31.141046] 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 [ 31.142676] RSP: 002b:00007ffc5e68cc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.143367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6ca1e7d82 [ 31.144015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6c9621000 [ 31.144655] RBP: 00007fb6c9621000 R08: 0000000000000009 R09: 0000000000001000 [ 31.145304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1f4331b20 [ 31.145971] R13: 00007ffc5e68cc40 R14: 00007ffc5e68cc70 R15: 00007ffc5e68cfd0 [ 31.146640] </TASK> [ 31.146874] [ 31.147031] Allocated by task 213: [ 31.147357] kasan_save_stack+0x22/0x50 [ 31.147768] kasan_set_track+0x25/0x30 [ 31.148143] __kasan_slab_alloc+0x59/0x70 [ 31.148528] kmem_cache_alloc+0x16b/0x370 [ 31.148921] vm_area_dup+0x20/0x160 [ 31.149284] __split_vma+0x170/0x950 [ 31.149652] split_vma+0xc6/0x110 [ 31.149994] mprotect_fixup+0x8d2/0xb30 [ 31.150367] do_mprotect_pkey+0x87e/0xd40 [ 31.150754] __x64_sys_mprotect+0x78/0xc0 [ 31.151154] do_syscall_64+0x3f/0x90 [ 31.151509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152015] [ 31.152178] Freed by task 213: [ 31.152476] kasan_save_stack+0x22/0x50 [ 31.152868] kasan_set_track+0x25/0x30 [ 31.153249] kasan_save_free_info+0x2b/0x50 [ 31.153655] __kasan_slab_free+0x10a/0x190 [ 31.154065] kmem_cache_free+0x10d/0x4d0 [ 31.154446] rcu_core+0x8c8/0x2860 [ 31.154771] __do_softirq+0x1b7/0x7d4 [ 31.155164] [ 31.155339] Last potentially related work creation: [ 31.155778] kasan_save_stack+0x22/0x50 [ 31.156161] __kasan_record_aux_stack+0x8e/0xa0 [ 31.156591] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.157088] remove_vma+0x139/0x170 [ 31.157430] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.157873] do_vmi_munmap+0x1f1/0x2b0 [ 31.158248] __vm_munmap+0x138/0x3a0 [ 31.158604] __x64_sys_munmap+0x59/0x80 [ 31.158980] do_syscall_64+0x3f/0x90 [ 31.159323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159824] [ 31.159982] The buggy address belongs to the object at ffff888019b063a0 [ 31.159982] which belongs to the cache vm_area_struct of size 168 [ 31.161087] The buggy address is located 88 bytes inside of [ 31.161087] freed 168-byte region [ffff888019b063a0, ffff888019b06448) [ 31.162140] [ 31.162296] The buggy address belongs to the physical page: [ 31.162782] page:00000000546abff1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b06 [ 31.163593] memcg:ffff88801a410a01 [ 31.163928] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.164404] page_type: 0xffffffff() [ 31.164732] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.165420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a410a01 [ 31.166105] page dumped because: kasan: bad access detected [ 31.166600] [ 31.166755] Memory state around the buggy address: [ 31.167215] ffff888019b06280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.167858] ffff888019b06300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.168484] >ffff888019b06380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.169111] ^ [ 31.169739] ffff888019b06400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.170370] ffff888019b06480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.171008] ================================================================== [ 31.171705] Disabling lock debugging due to kernel taint [ 33.323375] BUG: Bad rss-counter state mm:00000000aaf1d0dc type:MM_FILEPAGES val:33 [ 33.324482] BUG: Bad rss-counter state mm:00000000aaf1d0dc type:MM_ANONPAGES val:22 [ 33.929840] BUG: Bad rss-counter state mm:000000001607e1e7 type:MM_FILEPAGES val:33 [ 33.931055] BUG: Bad rss-counter state mm:000000001607e1e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48731' (ECDSA) to the list of known hosts. 2023/06/21 09:46:10 fuzzer started 2023/06/21 09:46:11 dialing manager at localhost:36067 2023/06/21 09:46:11 checking machine... 2023/06/21 09:46:11 checking revisions... [ 34.599635] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:46:11 testing simple program... [ 34.649177] cgroup: Unknown subsys name 'net' [ 34.726550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:46:10 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800e8f5680 RCX=ffffffff81370ce8 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce3a2c0 RBP=0000000000000200 RSP=ffff888019947e08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81370d54 RFL=00000086 [--S--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 00007f1a0f164900 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=00007f1a0f71c0b0 CR3=0000000016294000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=00007fa3a3841b40 CR3=000000000d730000 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=ad45cbb2def3d0837d46055ce6acec3f XMM02=000000000011b3a0eff9b2d0a8fce9cb XMM03=000000000011b4702c67c8bc2e329bc3 XMM04=12607fdd5288b8ae00000000000ae988 XMM05=19e9129bd510f2350000000000131f68 XMM06=4fda316b135da52b0000000000131df0 XMM07=e042d86d42eb936e0000000000122398 XMM08=c6d02cab041231db000000000011b470 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000