syzkaller login: [ 30.884553] BUG: Bad rss-counter state mm:0000000085191284 type:MM_FILEPAGES val:33 [ 30.885488] BUG: Bad rss-counter state mm:0000000085191284 type:MM_ANONPAGES val:22 [ 31.091633] ================================================================== [ 31.092493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.093376] Read of size 8 at addr ffff88800d5e16b0 by task sshd/222 [ 31.094096] [ 31.094417] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.095224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.096134] Call Trace: [ 31.096466] [ 31.096742] dump_stack_lvl+0x91/0xf0 [ 31.097206] print_report+0xcc/0x620 [ 31.097664] ? __virt_addr_valid+0x102/0x340 [ 31.098187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.099369] kasan_report+0xbe/0xf0 [ 31.099822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.100413] vma_interval_tree_remove+0xc75/0xec0 [ 31.100980] vma_prepare+0xc54/0x11a0 [ 31.101443] __split_vma+0x5af/0x950 [ 31.101911] ? __pfx___split_vma+0x10/0x10 [ 31.102465] ? find_held_lock+0x2c/0x110 [ 31.102982] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.103552] ? lock_is_held_type+0x9f/0x120 [ 31.104099] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.104713] ? mtree_range_walk+0x632/0x900 [ 31.105263] ? mas_walk+0x5c7/0x7c0 [ 31.105741] do_vmi_munmap+0x1f1/0x2b0 [ 31.106249] mmap_region+0x1f9/0x2660 [ 31.106727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.107240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.107950] ? __pfx_lock_acquire+0x10/0x10 [ 31.108486] ? __pfx_mmap_region+0x10/0x10 [ 31.109013] ? security_mmap_addr+0x7d/0xa0 [ 31.109541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.110100] do_mmap+0x854/0xf00 [ 31.110556] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.111046] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.111601] ksys_mmap_pgoff+0x3af/0x500 [ 31.112108] do_syscall_64+0x3f/0x90 [ 31.112587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.113236] RIP: 0033:0x7fea8dfa6d82 [ 31.113689] 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 [ 31.115783] RSP: 002b:00007fffd94df478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.116686] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea8dfa6d82 [ 31.117540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea8d3e0000 [ 31.118407] RBP: 00007fea8d3e0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.119243] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609cfb42b20 [ 31.120089] R13: 00007fffd94df490 R14: 00007fffd94df4c0 R15: 00007fffd94df820 [ 31.120951] [ 31.121242] [ 31.121452] Allocated by task 212: [ 31.121878] kasan_save_stack+0x22/0x50 [ 31.122392] kasan_set_track+0x25/0x30 [ 31.122879] __kasan_slab_alloc+0x59/0x70 [ 31.123412] kmem_cache_alloc+0x16b/0x370 [ 31.123919] vm_area_dup+0x20/0x160 [ 31.124368] __split_vma+0x170/0x950 [ 31.124839] split_vma+0xc6/0x110 [ 31.125267] mprotect_fixup+0x8d2/0xb30 [ 31.125769] do_mprotect_pkey+0x87e/0xd40 [ 31.126287] __x64_sys_mprotect+0x78/0xc0 [ 31.126803] do_syscall_64+0x3f/0x90 [ 31.127275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.127901] [ 31.128119] Freed by task 212: [ 31.128514] kasan_save_stack+0x22/0x50 [ 31.129003] kasan_set_track+0x25/0x30 [ 31.129502] kasan_save_free_info+0x2b/0x50 [ 31.130030] __kasan_slab_free+0x10a/0x190 [ 31.130578] kmem_cache_free+0x10d/0x4d0 [ 31.131094] rcu_core+0x8c8/0x2860 [ 31.131533] __do_softirq+0x1b7/0x7d4 [ 31.132007] [ 31.132219] Last potentially related work creation: [ 31.132797] kasan_save_stack+0x22/0x50 [ 31.133295] __kasan_record_aux_stack+0x8e/0xa0 [ 31.133854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.134513] remove_vma+0x139/0x170 [ 31.134976] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.135530] do_vmi_munmap+0x1f1/0x2b0 [ 31.136017] __vm_munmap+0x138/0x3a0 [ 31.136487] __x64_sys_munmap+0x59/0x80 [ 31.136981] do_syscall_64+0x3f/0x90 [ 31.137452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138092] [ 31.138315] Second to last potentially related work creation: [ 31.139006] kasan_save_stack+0x22/0x50 [ 31.139496] __kasan_record_aux_stack+0x8e/0xa0 [ 31.140080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.140718] remove_vma+0x139/0x170 [ 31.141163] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.141714] do_vmi_munmap+0x1f1/0x2b0 [ 31.142195] mmap_region+0x1f9/0x2660 [ 31.142697] do_mmap+0x854/0xf00 [ 31.143134] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.143624] ksys_mmap_pgoff+0x3af/0x500 [ 31.144114] do_syscall_64+0x3f/0x90 [ 31.144577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145211] [ 31.145424] The buggy address belongs to the object at ffff88800d5e1658 [ 31.145424] which belongs to the cache vm_area_struct of size 168 [ 31.146870] The buggy address is located 88 bytes inside of [ 31.146870] freed 168-byte region [ffff88800d5e1658, ffff88800d5e1700) [ 31.148273] [ 31.148491] The buggy address belongs to the physical page: [ 31.149141] page:00000000b8ce0ff4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5e1 [ 31.150226] memcg:ffff88800c93a201 [ 31.150661] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.151352] page_type: 0xffffffff() [ 31.151801] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.152719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c93a201 [ 31.153616] page dumped because: kasan: bad access detected [ 31.154278] [ 31.154499] Memory state around the buggy address: [ 31.155076] ffff88800d5e1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.155925] ffff88800d5e1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.156779] >ffff88800d5e1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.157631] ^ [ 31.158220] ffff88800d5e1700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.159070] ffff88800d5e1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.159915] ================================================================== [ 31.160941] Disabling lock debugging due to kernel taint [ 33.611078] BUG: Bad rss-counter state mm:00000000b0ccadf6 type:MM_FILEPAGES val:33 [ 33.612225] BUG: Bad rss-counter state mm:00000000b0ccadf6 type:MM_ANONPAGES val:22 [ 34.123593] BUG: Bad rss-counter state mm:00000000d2e0a654 type:MM_FILEPAGES val:33 [ 34.124576] BUG: Bad rss-counter state mm:00000000d2e0a654 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61025' (ECDSA) to the list of known hosts. 2023/06/20 07:40:15 fuzzer started 2023/06/20 07:40:16 dialing manager at localhost:44161 2023/06/20 07:40:16 checking machine... 2023/06/20 07:40:16 checking revisions... [ 34.726761] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:40:16 testing simple program... [ 34.775317] cgroup: Unknown subsys name 'net' [ 34.829428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:13 Registers: info registers vcpu 0 RAX=ffffffff8113077a RBX=ffffffff813ad420 RCX=ffffffff864bb001 RDX=1ffff1100d9c135a RSI=ffffffff8113077a RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =ffffffff864bb032 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800f46b680 R15=ffff88800ee80f00 RIP=ffffffff813ad424 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 00007f800707d900 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=00007f8006511fb0 CR3=000000000d7ac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=30bd8af1e0fcb36500000000000ae988 XMM05=770b72e84bf46dc10000000000135cf0 XMM06=4fda316b135da52b0000000000134d90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffff88806cf09b38 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff88806cf09b6c RBP=0000000000000000 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016bb1b40 R15=ffff88801aa4ab30 RIP=ffffffff813ad49e RFL=00000213 [----A-C] 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 00007f1d6abef700 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=00007fbbe006a618 CR3=0000000015994000 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=2035313a30343a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a30343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000