syzkaller login: [ 30.045168] BUG: Bad rss-counter state mm:00000000ec379941 type:MM_FILEPAGES val:33 [ 30.046303] BUG: Bad rss-counter state mm:00000000ec379941 type:MM_ANONPAGES val:22 [ 30.202940] ================================================================== [ 30.203878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.204836] Read of size 8 at addr ffff88800dafddf0 by task sshd/220 [ 30.205607] [ 30.205835] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.207049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.208060] Call Trace: [ 30.208375] [ 30.208676] dump_stack_lvl+0x91/0xf0 [ 30.209179] print_report+0xcc/0x620 [ 30.209664] ? __virt_addr_valid+0x102/0x340 [ 30.210228] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.210842] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211465] kasan_report+0xbe/0xf0 [ 30.211954] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.212587] vma_interval_tree_remove+0xc75/0xec0 [ 30.213207] vma_prepare+0xc54/0x11a0 [ 30.213691] __split_vma+0x5af/0x950 [ 30.214172] ? __pfx___split_vma+0x10/0x10 [ 30.214698] ? find_held_lock+0x2c/0x110 [ 30.215231] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.215811] ? lock_is_held_type+0x9f/0x120 [ 30.216363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.216969] ? mtree_range_walk+0x632/0x900 [ 30.217536] ? mas_walk+0x5c7/0x7c0 [ 30.218021] do_vmi_munmap+0x1f1/0x2b0 [ 30.218511] mmap_region+0x1f9/0x2660 [ 30.218999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.219545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.220264] ? __pfx_lock_acquire+0x10/0x10 [ 30.220789] ? __pfx_mmap_region+0x10/0x10 [ 30.221330] ? security_mmap_addr+0x7d/0xa0 [ 30.221852] ? get_unmapped_area+0x1f5/0x3f0 [ 30.222414] do_mmap+0x854/0xf00 [ 30.222849] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.223357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.223931] ksys_mmap_pgoff+0x3af/0x500 [ 30.224442] do_syscall_64+0x3f/0x90 [ 30.224915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.225571] RIP: 0033:0x7fed51e13d82 [ 30.226040] 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 [ 30.228201] RSP: 002b:00007ffe08e9a258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.229115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed51e13d82 [ 30.229954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed5124d000 [ 30.230802] RBP: 00007fed5124d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.231673] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566e2fcbd90 [ 30.232526] R13: 00007ffe08e9a270 R14: 00007ffe08e9a2a0 R15: 00007ffe08e9a600 [ 30.233383] [ 30.233672] [ 30.233885] Allocated by task 213: [ 30.234331] kasan_save_stack+0x22/0x50 [ 30.234832] kasan_set_track+0x25/0x30 [ 30.235338] __kasan_slab_alloc+0x59/0x70 [ 30.235882] kmem_cache_alloc+0x16b/0x370 [ 30.236415] vm_area_dup+0x20/0x160 [ 30.236869] __split_vma+0x170/0x950 [ 30.237345] split_vma+0xc6/0x110 [ 30.237784] mprotect_fixup+0x8d2/0xb30 [ 30.238294] do_mprotect_pkey+0x87e/0xd40 [ 30.238809] __x64_sys_mprotect+0x78/0xc0 [ 30.239339] do_syscall_64+0x3f/0x90 [ 30.239819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.240465] [ 30.240677] Freed by task 213: [ 30.241078] kasan_save_stack+0x22/0x50 [ 30.241581] kasan_set_track+0x25/0x30 [ 30.242081] kasan_save_free_info+0x2b/0x50 [ 30.242604] __kasan_slab_free+0x10a/0x190 [ 30.243150] kmem_cache_free+0x10d/0x4d0 [ 30.243662] rcu_core+0x8c8/0x2860 [ 30.244112] __do_softirq+0x1b7/0x7d4 [ 30.244592] [ 30.244804] Last potentially related work creation: [ 30.245396] kasan_save_stack+0x22/0x50 [ 30.245896] __kasan_record_aux_stack+0x8e/0xa0 [ 30.246479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.247170] remove_vma+0x139/0x170 [ 30.247782] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.248353] do_vmi_munmap+0x1f1/0x2b0 [ 30.248838] __vm_munmap+0x138/0x3a0 [ 30.249313] __x64_sys_munmap+0x59/0x80 [ 30.249807] do_syscall_64+0x3f/0x90 [ 30.250291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250924] [ 30.251156] The buggy address belongs to the object at ffff88800dafdd98 [ 30.251156] which belongs to the cache vm_area_struct of size 168 [ 30.252637] The buggy address is located 88 bytes inside of [ 30.252637] freed 168-byte region [ffff88800dafdd98, ffff88800dafde40) [ 30.254049] [ 30.254264] The buggy address belongs to the physical page: [ 30.254921] page:00000000cba62612 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdafd [ 30.256041] memcg:ffff88800e940101 [ 30.256471] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.257173] page_type: 0xffffffff() [ 30.257614] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.258534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e940101 [ 30.259439] page dumped because: kasan: bad access detected [ 30.260122] [ 30.260335] Memory state around the buggy address: [ 30.260914] ffff88800dafdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.261778] ffff88800dafdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.262636] >ffff88800dafdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.263507] ^ [ 30.264319] ffff88800dafde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.265173] ffff88800dafde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.266034] ================================================================== [ 30.266996] Disabling lock debugging due to kernel taint [ 33.224019] BUG: Bad rss-counter state mm:000000003617db76 type:MM_FILEPAGES val:33 [ 33.225088] BUG: Bad rss-counter state mm:000000003617db76 type:MM_ANONPAGES val:22 [ 33.651481] BUG: Bad rss-counter state mm:0000000036bef779 type:MM_FILEPAGES val:33 [ 33.652487] BUG: Bad rss-counter state mm:0000000036bef779 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21294' (ECDSA) to the list of known hosts. 2023/06/21 04:49:32 fuzzer started 2023/06/21 04:49:32 dialing manager at localhost:36067 2023/06/21 04:49:32 checking machine... 2023/06/21 04:49:32 checking revisions... [ 34.302654] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:49:32 testing simple program... [ 34.354851] cgroup: Unknown subsys name 'net' [ 34.403192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:49:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff110013c5f1a RSI=ffffffff8180c6a2 RDI=ffff888009e2f940 RBP=ffff888009e2f910 RSP=ffff888009e2f868 R8 =ffffffff860d825a R9 =ffff888009e2f8b8 R10=0000000000038001 R11=0000000000010b8d R12=ffff888009e2f940 R13=0000000000000000 R14=ffff88800a3f51c0 R15=0000000000092cc0 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f008271b900 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=00007ffd7eed8000 CR3=000000000e418000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff813782f8 RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000022978 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff811306ec 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=00007f728cfa53d0 CR3=0000000013a22000 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=d438a0a79afa84aa044106e24a5a4e22 XMM02=000000000011a3f8eff9b2d0a8fce9cb XMM03=000000000011a4c82c67c8bc2e329bc3 XMM04=000dc6dba57110d100000000000ae988 XMM05=fb954c51f82ffd7b0000000000132cb0 XMM06=4fda316b135da52b0000000000131d50 XMM07=e042d86d42eb936e00000000001222f8 XMM08=ae7b9a6af21fb1b6000000000011a4c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000