syzkaller login: [ 46.011198] BUG: Bad rss-counter state mm:00000000aec603a1 type:MM_FILEPAGES val:33 [ 46.013032] BUG: Bad rss-counter state mm:00000000aec603a1 type:MM_ANONPAGES val:22 [ 46.179188] ================================================================== [ 46.180144] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.181148] Read of size 8 at addr ffff88800ed66968 by task sshd/220 [ 46.182075] [ 46.182313] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.183246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.184290] Call Trace: [ 46.184627] [ 46.184950] dump_stack_lvl+0x91/0xf0 [ 46.185489] print_report+0xcc/0x620 [ 46.186014] ? __virt_addr_valid+0x102/0x340 [ 46.186615] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.187261] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.187933] kasan_report+0xbe/0xf0 [ 46.188463] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.189161] vma_interval_tree_remove+0xc75/0xec0 [ 46.189834] vma_prepare+0xc54/0x11a0 [ 46.190368] __split_vma+0x5af/0x950 [ 46.190924] ? __pfx___split_vma+0x10/0x10 [ 46.191517] ? find_held_lock+0x2c/0x110 [ 46.192094] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.192723] ? lock_is_held_type+0x9f/0x120 [ 46.193324] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.194000] ? mtree_range_walk+0x632/0x900 [ 46.194612] ? mas_walk+0x5c7/0x7c0 [ 46.195155] do_vmi_munmap+0x1f1/0x2b0 [ 46.195703] mmap_region+0x1f9/0x2660 [ 46.196243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.196810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.197605] ? __pfx_lock_acquire+0x10/0x10 [ 46.198202] ? __pfx_mmap_region+0x10/0x10 [ 46.198821] ? security_mmap_addr+0x7d/0xa0 [ 46.199418] ? get_unmapped_area+0x1f5/0x3f0 [ 46.200028] do_mmap+0x854/0xf00 [ 46.200521] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.201076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.201693] ksys_mmap_pgoff+0x3af/0x500 [ 46.202259] do_syscall_64+0x3f/0x90 [ 46.202802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.203521] RIP: 0033:0x7faaf9f60d82 [ 46.204033] 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 [ 46.206404] RSP: 002b:00007fff831b02e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.207420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaf9f60d82 [ 46.208368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaf939a000 [ 46.209314] RBP: 00007faaf939a000 R08: 0000000000000009 R09: 0000000000001000 [ 46.210253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2a9338f70 [ 46.211187] R13: 00007fff831b0300 R14: 00007fff831b0330 R15: 00007fff831b0690 [ 46.212064] [ 46.212364] [ 46.212585] Allocated by task 213: [ 46.213020] kasan_save_stack+0x22/0x50 [ 46.213534] kasan_set_track+0x25/0x30 [ 46.214040] __kasan_slab_alloc+0x59/0x70 [ 46.214576] kmem_cache_alloc+0x16b/0x370 [ 46.215115] vm_area_dup+0x20/0x160 [ 46.215580] __split_vma+0x170/0x950 [ 46.216058] split_vma+0xc6/0x110 [ 46.216507] mprotect_fixup+0x8d2/0xb30 [ 46.217017] do_mprotect_pkey+0x87e/0xd40 [ 46.217545] __x64_sys_mprotect+0x78/0xc0 [ 46.218072] do_syscall_64+0x3f/0x90 [ 46.218553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.219251] [ 46.219489] Freed by task 213: [ 46.219921] kasan_save_stack+0x22/0x50 [ 46.220452] kasan_set_track+0x25/0x30 [ 46.220976] kasan_save_free_info+0x2b/0x50 [ 46.221561] __kasan_slab_free+0x10a/0x190 [ 46.222143] kmem_cache_free+0x10d/0x4d0 [ 46.222709] rcu_core+0x8c8/0x2860 [ 46.223199] __do_softirq+0x1b7/0x7d4 [ 46.223722] [ 46.223960] Last potentially related work creation: [ 46.224607] kasan_save_stack+0x22/0x50 [ 46.225135] __kasan_record_aux_stack+0x8e/0xa0 [ 46.225744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.226423] remove_vma+0x139/0x170 [ 46.226913] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.227502] do_vmi_munmap+0x1f1/0x2b0 [ 46.228014] __vm_munmap+0x138/0x3a0 [ 46.228513] __x64_sys_munmap+0x59/0x80 [ 46.229047] do_syscall_64+0x3f/0x90 [ 46.229544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.230221] [ 46.230454] The buggy address belongs to the object at ffff88800ed66910 [ 46.230454] which belongs to the cache vm_area_struct of size 168 [ 46.232056] The buggy address is located 88 bytes inside of [ 46.232056] freed 168-byte region [ffff88800ed66910, ffff88800ed669b8) [ 46.233567] [ 46.233792] The buggy address belongs to the physical page: [ 46.234494] page:000000007a87ee45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed66 [ 46.235658] memcg:ffff88800f131b01 [ 46.236112] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.236796] page_type: 0xffffffff() [ 46.237277] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.238249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f131b01 [ 46.239236] page dumped because: kasan: bad access detected [ 46.239933] [ 46.240166] Memory state around the buggy address: [ 46.240792] ffff88800ed66800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 46.241702] ffff88800ed66880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 46.242614] >ffff88800ed66900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.243545] ^ [ 46.244381] ffff88800ed66980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 46.245298] ffff88800ed66a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.246200] ================================================================== [ 46.247309] Disabling lock debugging due to kernel taint [ 48.089335] BUG: Bad rss-counter state mm:0000000025ad37a7 type:MM_FILEPAGES val:33 [ 48.090337] BUG: Bad rss-counter state mm:0000000025ad37a7 type:MM_ANONPAGES val:22 [ 48.456525] BUG: Bad rss-counter state mm:0000000042df9ce2 type:MM_FILEPAGES val:33 [ 48.457281] BUG: Bad rss-counter state mm:0000000042df9ce2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42305' (ECDSA) to the list of known hosts. 2023/06/19 12:14:48 fuzzer started 2023/06/19 12:14:48 dialing manager at localhost:44161 2023/06/19 12:14:48 checking machine... 2023/06/19 12:14:48 checking revisions... [ 49.091525] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:14:48 testing simple program... [ 49.129696] cgroup: Unknown subsys name 'net' [ 49.182056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:14:32 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000283 R13=ffffea0000384c80 R14=ffffffff8186b9c5 R15=ffff88800e7ce780 RIP=ffffffff812e004a 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007f6d00900ff0 CR3=00000000145de000 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=da6563423a065191304b1355eddb1d1b XMM02=ec2efd57dc4c00df000000000011fcb8 XMM03=23f8bbd23924c71e000000000011fd88 XMM04=1902128271df858800000000000ae988 XMM05=19e9129bd510f2350000000000133ef8 XMM06=af30e6e2ba54ef8a0000000000132d60 XMM07=e042d86d42eb936e0000000000124670 XMM08=23f8bbd23924c71e000000000011fd88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016b88001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016b87a01 RSI=ffff888016b87ae0 RDI=ffff888016b87ae0 RBP=ffff888016b870a8 RSP=ffff888016b86fd8 R8 =0000000000000001 R9 =ffff888016b87090 R10=0000000000038001 R11=00000000000b3ea9 R12=ffff888016b870b0 R13=ffff888016b87098 R14=ffff888016b87ae0 R15=ffff888016b87050 RIP=ffffffff8112fbf0 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 00007f9f5386b900 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=00005642ca4c1c28 CR3=000000000c54e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000