syzkaller login: [ 38.305098] BUG: Bad rss-counter state mm:00000000efe27d1b type:MM_FILEPAGES val:33 [ 38.306244] BUG: Bad rss-counter state mm:00000000efe27d1b type:MM_ANONPAGES val:22 [ 38.482339] ================================================================== [ 38.483255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.484211] Read of size 8 at addr ffff888017768a50 by task sshd/218 [ 38.484980] [ 38.485298] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.486161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.487140] Call Trace: [ 38.487463] [ 38.487751] dump_stack_lvl+0x91/0xf0 [ 38.488255] print_report+0xcc/0x620 [ 38.488748] ? __virt_addr_valid+0x102/0x340 [ 38.489329] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.489958] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.490569] kasan_report+0xbe/0xf0 [ 38.491040] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.491670] vma_interval_tree_remove+0xc75/0xec0 [ 38.492288] vma_prepare+0xc54/0x11a0 [ 38.492778] __split_vma+0x5af/0x950 [ 38.493266] ? __pfx___split_vma+0x10/0x10 [ 38.493805] ? find_held_lock+0x2c/0x110 [ 38.494332] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.494894] ? lock_is_held_type+0x9f/0x120 [ 38.495439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.496045] ? mtree_range_walk+0x632/0x900 [ 38.496600] ? mas_walk+0x5c7/0x7c0 [ 38.497077] do_vmi_munmap+0x1f1/0x2b0 [ 38.497574] mmap_region+0x1f9/0x2660 [ 38.498059] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.498571] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.499293] ? __pfx_lock_acquire+0x10/0x10 [ 38.499822] ? __pfx_mmap_region+0x10/0x10 [ 38.500355] ? security_mmap_addr+0x7d/0xa0 [ 38.500882] ? get_unmapped_area+0x1f5/0x3f0 [ 38.501450] do_mmap+0x854/0xf00 [ 38.501888] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.502389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.502952] ksys_mmap_pgoff+0x3af/0x500 [ 38.503458] do_syscall_64+0x3f/0x90 [ 38.503936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.504578] RIP: 0033:0x7f6268c7dd82 [ 38.505043] 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 [ 38.507169] RSP: 002b:00007fffce36f058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.508089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6268c7dd82 [ 38.508950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62680b7000 [ 38.509820] RBP: 00007f62680b7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.510686] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c96ca7b20 [ 38.511540] R13: 00007fffce36f070 R14: 00007fffce36f0a0 R15: 00007fffce36f400 [ 38.512394] [ 38.512691] [ 38.512906] Allocated by task 211: [ 38.513346] kasan_save_stack+0x22/0x50 [ 38.513849] kasan_set_track+0x25/0x30 [ 38.514352] __kasan_slab_alloc+0x59/0x70 [ 38.514888] kmem_cache_alloc+0x16b/0x370 [ 38.515405] vm_area_dup+0x20/0x160 [ 38.515868] __split_vma+0x170/0x950 [ 38.516338] split_vma+0xc6/0x110 [ 38.516781] mprotect_fixup+0x8d2/0xb30 [ 38.517291] do_mprotect_pkey+0x87e/0xd40 [ 38.517815] __x64_sys_mprotect+0x78/0xc0 [ 38.518335] do_syscall_64+0x3f/0x90 [ 38.518810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.519449] [ 38.519671] Freed by task 202: [ 38.520063] kasan_save_stack+0x22/0x50 [ 38.520574] kasan_set_track+0x25/0x30 [ 38.521085] kasan_save_free_info+0x2b/0x50 [ 38.521615] __kasan_slab_free+0x10a/0x190 [ 38.522146] kmem_cache_free+0x10d/0x4d0 [ 38.522656] rcu_core+0x8c8/0x2860 [ 38.523106] __do_softirq+0x1b7/0x7d4 [ 38.523587] [ 38.523801] Last potentially related work creation: [ 38.524384] kasan_save_stack+0x22/0x50 [ 38.524893] __kasan_record_aux_stack+0x8e/0xa0 [ 38.525477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.526114] remove_vma+0x139/0x170 [ 38.526563] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.527120] do_vmi_munmap+0x1f1/0x2b0 [ 38.527603] __vm_munmap+0x138/0x3a0 [ 38.528074] __x64_sys_munmap+0x59/0x80 [ 38.528570] do_syscall_64+0x3f/0x90 [ 38.529057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.529694] [ 38.529907] The buggy address belongs to the object at ffff8880177689f8 [ 38.529907] which belongs to the cache vm_area_struct of size 168 [ 38.531389] The buggy address is located 88 bytes inside of [ 38.531389] freed 168-byte region [ffff8880177689f8, ffff888017768aa0) [ 38.532804] [ 38.533031] The buggy address belongs to the physical page: [ 38.533703] page:000000009e7d9d28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17768 [ 38.534783] memcg:ffff88800c93a901 [ 38.535220] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.535871] page_type: 0xffffffff() [ 38.536329] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.537279] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c93a901 [ 38.538183] page dumped because: kasan: bad access detected [ 38.538850] [ 38.539063] Memory state around the buggy address: [ 38.539650] ffff888017768900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.540513] ffff888017768980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.541407] >ffff888017768a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.542277] ^ [ 38.542980] ffff888017768a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.543838] ffff888017768b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.544718] ================================================================== [ 38.545704] Disabling lock debugging due to kernel taint [ 40.620654] BUG: Bad rss-counter state mm:0000000099ed348e type:MM_FILEPAGES val:33 [ 40.621869] BUG: Bad rss-counter state mm:0000000099ed348e type:MM_ANONPAGES val:22 [ 41.106655] BUG: Bad rss-counter state mm:000000000dea118f type:MM_FILEPAGES val:33 [ 41.107892] BUG: Bad rss-counter state mm:000000000dea118f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41037' (ECDSA) to the list of known hosts. 2023/06/20 00:44:42 fuzzer started 2023/06/20 00:44:43 dialing manager at localhost:44161 2023/06/20 00:44:43 checking machine... 2023/06/20 00:44:43 checking revisions... [ 41.870958] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:44:43 testing simple program... [ 41.913333] cgroup: Unknown subsys name 'net' [ 41.949335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:44:39 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800c1eb828 RCX=0000000000000000 RDX=ffff888014649b40 RSI=ffffffff81b3bcc4 RDI=0000000000000005 RBP=0000000000800000 RSP=ffff8880146f7790 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000800000 R14=ffff888016332a50 R15=ffff8880146f78c0 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc0633a900 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=00007fdc0574ccf0 CR3=000000000d952000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=daf46c0acbba3a2b00000000000ae988 XMM05=5399fb4f5b7063b00000000000134f10 XMM06=deff526ff3db19760000000000133c48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=ffff888008440900 RDI=ffffffff81806fbd RBP=ffff888016acfc60 RSP=ffff888016acfba0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008442000 R13=ffff888008442000 R14=ffff88806cf3d100 R15=ffff88806cf3d0e0 RIP=ffffffff81807789 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 00007f13930f6900 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=00007f13936ae0b0 CR3=000000000ee58000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000