syzkaller login: [ 35.891071] BUG: Bad rss-counter state mm:0000000052a787e4 type:MM_FILEPAGES val:33 [ 35.891703] BUG: Bad rss-counter state mm:0000000052a787e4 type:MM_ANONPAGES val:22 [ 36.063587] ================================================================== [ 36.064225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.064842] Read of size 8 at addr ffff888014674ed8 by task sshd/225 [ 36.065381] [ 36.065529] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.066148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.066818] Call Trace: [ 36.067031] [ 36.067224] dump_stack_lvl+0x91/0xf0 [ 36.067559] print_report+0xcc/0x620 [ 36.067928] ? __virt_addr_valid+0x102/0x340 [ 36.068297] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.068716] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.069622] kasan_report+0xbe/0xf0 [ 36.069964] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.071924] vma_interval_tree_remove+0xc75/0xec0 [ 36.077112] vma_prepare+0xc54/0x11a0 [ 36.077449] __split_vma+0x5af/0x950 [ 36.077831] ? __pfx___split_vma+0x10/0x10 [ 36.078207] ? find_held_lock+0x2c/0x110 [ 36.078577] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.078961] ? lock_is_held_type+0x9f/0x120 [ 36.079321] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.079747] ? mtree_range_walk+0x632/0x900 [ 36.080128] ? mas_walk+0x5c7/0x7c0 [ 36.080445] do_vmi_munmap+0x1f1/0x2b0 [ 36.080802] mmap_region+0x1f9/0x2660 [ 36.081166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.081499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.081932] ? __pfx_lock_acquire+0x10/0x10 [ 36.082250] ? __pfx_mmap_region+0x10/0x10 [ 36.082565] ? security_mmap_addr+0x7d/0xa0 [ 36.082879] ? get_unmapped_area+0x1f5/0x3f0 [ 36.083203] do_mmap+0x854/0xf00 [ 36.083460] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.083752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.084086] ksys_mmap_pgoff+0x3af/0x500 [ 36.084394] do_syscall_64+0x3f/0x90 [ 36.084698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.085224] RIP: 0033:0x7fbe31352d82 [ 36.085558] 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 [ 36.086860] RSP: 002b:00007ffe18375b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.087415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe31352d82 [ 36.087960] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe3078c000 [ 36.088450] RBP: 00007fbe3078c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.089014] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e4c440ec0 [ 36.089534] R13: 00007ffe18375b60 R14: 00007ffe18375b90 R15: 00007ffe18375ef0 [ 36.090080] [ 36.090269] [ 36.090409] Allocated by task 218: [ 36.090688] kasan_save_stack+0x22/0x50 [ 36.091027] kasan_set_track+0x25/0x30 [ 36.091358] __kasan_slab_alloc+0x59/0x70 [ 36.091724] kmem_cache_alloc+0x16b/0x370 [ 36.092089] vm_area_dup+0x20/0x160 [ 36.092390] __split_vma+0x170/0x950 [ 36.092731] split_vma+0xc6/0x110 [ 36.093040] mprotect_fixup+0x8d2/0xb30 [ 36.093378] do_mprotect_pkey+0x87e/0xd40 [ 36.093745] __x64_sys_mprotect+0x78/0xc0 [ 36.094105] do_syscall_64+0x3f/0x90 [ 36.094411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.094851] [ 36.094988] Freed by task 19: [ 36.095228] kasan_save_stack+0x22/0x50 [ 36.095543] kasan_set_track+0x25/0x30 [ 36.095860] kasan_save_free_info+0x2b/0x50 [ 36.096192] __kasan_slab_free+0x10a/0x190 [ 36.096527] kmem_cache_free+0x10d/0x4d0 [ 36.096855] rcu_core+0x8c8/0x2860 [ 36.101230] __do_softirq+0x1b7/0x7d4 [ 36.101548] [ 36.101726] Last potentially related work creation: [ 36.102107] kasan_save_stack+0x22/0x50 [ 36.102436] __kasan_record_aux_stack+0x8e/0xa0 [ 36.102804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.103220] remove_vma+0x139/0x170 [ 36.103511] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.103920] do_vmi_munmap+0x1f1/0x2b0 [ 36.104236] __vm_munmap+0x138/0x3a0 [ 36.104540] __x64_sys_munmap+0x59/0x80 [ 36.104894] do_syscall_64+0x3f/0x90 [ 36.105234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.105650] [ 36.105796] The buggy address belongs to the object at ffff888014674e80 [ 36.105796] which belongs to the cache vm_area_struct of size 168 [ 36.106770] The buggy address is located 88 bytes inside of [ 36.106770] freed 168-byte region [ffff888014674e80, ffff888014674f28) [ 36.107678] [ 36.107859] The buggy address belongs to the physical page: [ 36.108397] page:0000000019857913 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14674 [ 36.109168] memcg:ffff888014675001 [ 36.109456] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.109892] page_type: 0xffffffff() [ 36.110203] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.110889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014675001 [ 36.111519] page dumped because: kasan: bad access detected [ 36.112032] [ 36.112191] Memory state around the buggy address: [ 36.112606] ffff888014674d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.117273] ffff888014674e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.117858] >ffff888014674e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.118416] ^ [ 36.118895] ffff888014674f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.119454] ffff888014674f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.120066] ================================================================== [ 36.121177] Disabling lock debugging due to kernel taint [ 38.664289] BUG: Bad rss-counter state mm:000000009eec33f8 type:MM_FILEPAGES val:33 [ 38.664900] BUG: Bad rss-counter state mm:000000009eec33f8 type:MM_ANONPAGES val:22 [ 39.508300] BUG: Bad rss-counter state mm:000000002c6a2284 type:MM_FILEPAGES val:33 [ 39.512689] BUG: Bad rss-counter state mm:000000002c6a2284 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4707' (ECDSA) to the list of known hosts. 2023/06/21 10:11:20 fuzzer started 2023/06/21 10:11:20 dialing manager at localhost:36067 2023/06/21 10:11:20 checking machine... 2023/06/21 10:11:20 checking revisions... [ 40.423846] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:11:20 testing simple program... [ 40.479539] cgroup: Unknown subsys name 'net' [ 40.538635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:11:20 Registers: info registers vcpu 0 RAX=ffffffff8111a670 RBX=ffff8880087a9380 RCX=ffffffff81128d81 RDX=1ffffffff0a58f99 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffff888008476828 RSP=ffff88806ce09f20 R8 =0000000000000001 R9 =ffffed100d9c5059 R10=ffff88806ce282cf R11=ffff88806ce09ff8 R12=ffff8880087a9384 R13=0000000000000024 R14=ffffffff852c7ca0 R15=0000000000000000 RIP=ffffffff8111a67c 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 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=00007ffd6135a408 CR3=000000000d84c000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f6ab81e0c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ee9bbe8 RCX=0000000000000000 RDX=ffff888016373680 RSI=00007f7703128000 RDI=00007f7703127000 RBP=ffff88800ee9bbc8 RSP=ffff8880094f7ad8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f7703127000 R13=00007f7703128000 R14=ffff8880094f7b80 R15=ffff88800ee9bc50 RIP=ffffffff814c0370 RFL=00000293 [--S-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 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=00007f7702ddd328 CR3=0000000016ef8000 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