syzkaller login: [ 31.111037] BUG: Bad rss-counter state mm:000000004a4beaca type:MM_FILEPAGES val:33 [ 31.112573] BUG: Bad rss-counter state mm:000000004a4beaca type:MM_ANONPAGES val:22 [ 31.271980] ================================================================== [ 31.272932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.273919] Read of size 8 at addr ffff888019dcfd08 by task sshd/222 [ 31.274843] [ 31.275075] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.275990] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.277017] Call Trace: [ 31.277350] [ 31.277649] dump_stack_lvl+0x91/0xf0 [ 31.278176] print_report+0xcc/0x620 [ 31.278681] ? __virt_addr_valid+0x102/0x340 [ 31.279269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279916] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280559] kasan_report+0xbe/0xf0 [ 31.281066] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281722] vma_interval_tree_remove+0xc75/0xec0 [ 31.282359] vma_prepare+0xc54/0x11a0 [ 31.282863] __split_vma+0x5af/0x950 [ 31.283385] ? __pfx___split_vma+0x10/0x10 [ 31.283945] ? find_held_lock+0x2c/0x110 [ 31.284492] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.285089] ? lock_is_held_type+0x9f/0x120 [ 31.285657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.286296] ? mtree_range_walk+0x632/0x900 [ 31.286880] ? mas_walk+0x5c7/0x7c0 [ 31.287392] do_vmi_munmap+0x1f1/0x2b0 [ 31.287911] mmap_region+0x1f9/0x2660 [ 31.288419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.288959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.289714] ? __pfx_lock_acquire+0x10/0x10 [ 31.290277] ? __pfx_mmap_region+0x10/0x10 [ 31.290835] ? security_mmap_addr+0x7d/0xa0 [ 31.291403] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291991] do_mmap+0x854/0xf00 [ 31.292454] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292978] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.293571] ksys_mmap_pgoff+0x3af/0x500 [ 31.294105] do_syscall_64+0x3f/0x90 [ 31.294609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295353] RIP: 0033:0x7f1e91cc0d82 [ 31.295841] 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 [ 31.298072] RSP: 002b:00007ffeadcbb808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.299025] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e91cc0d82 [ 31.299928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e910fa000 [ 31.300822] RBP: 00007f1e910fa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.301711] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b7efecec0 [ 31.302600] R13: 00007ffeadcbb820 R14: 00007ffeadcbb850 R15: 00007ffeadcbbbb0 [ 31.303518] [ 31.303825] [ 31.304052] Allocated by task 215: [ 31.304502] kasan_save_stack+0x22/0x50 [ 31.305033] kasan_set_track+0x25/0x30 [ 31.305551] __kasan_slab_alloc+0x59/0x70 [ 31.306109] kmem_cache_alloc+0x16b/0x370 [ 31.306646] vm_area_dup+0x20/0x160 [ 31.307125] __split_vma+0x170/0x950 [ 31.307625] split_vma+0xc6/0x110 [ 31.308092] mprotect_fixup+0x8d2/0xb30 [ 31.308616] do_mprotect_pkey+0x87e/0xd40 [ 31.309166] __x64_sys_mprotect+0x78/0xc0 [ 31.309712] do_syscall_64+0x3f/0x90 [ 31.310213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310887] [ 31.311114] Freed by task 215: [ 31.311535] kasan_save_stack+0x22/0x50 [ 31.312065] kasan_set_track+0x25/0x30 [ 31.312585] kasan_save_free_info+0x2b/0x50 [ 31.313141] __kasan_slab_free+0x10a/0x190 [ 31.313699] kmem_cache_free+0x10d/0x4d0 [ 31.314233] rcu_core+0x8c8/0x2860 [ 31.314704] __do_softirq+0x1b7/0x7d4 [ 31.315208] [ 31.315459] Last potentially related work creation: [ 31.316076] kasan_save_stack+0x22/0x50 [ 31.316602] __kasan_record_aux_stack+0x8e/0xa0 [ 31.317209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.317891] remove_vma+0x139/0x170 [ 31.318367] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.318958] do_vmi_munmap+0x1f1/0x2b0 [ 31.319476] __vm_munmap+0x138/0x3a0 [ 31.319972] __x64_sys_munmap+0x59/0x80 [ 31.320494] do_syscall_64+0x3f/0x90 [ 31.320998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321675] [ 31.321907] The buggy address belongs to the object at ffff888019dcfcb0 [ 31.321907] which belongs to the cache vm_area_struct of size 168 [ 31.323452] The buggy address is located 88 bytes inside of [ 31.323452] freed 168-byte region [ffff888019dcfcb0, ffff888019dcfd58) [ 31.324932] [ 31.325160] The buggy address belongs to the physical page: [ 31.325858] page:0000000010ebce39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dcf [ 31.327011] memcg:ffff88800eb2f401 [ 31.327479] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.328159] page_type: 0xffffffff() [ 31.328634] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.329604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb2f401 [ 31.330557] page dumped because: kasan: bad access detected [ 31.331263] [ 31.331494] Memory state around the buggy address: [ 31.332107] ffff888019dcfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.333010] ffff888019dcfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.333914] >ffff888019dcfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.334812] ^ [ 31.335293] ffff888019dcfd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.336202] ffff888019dcfe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.337101] ================================================================== [ 31.338381] Disabling lock debugging due to kernel taint [ 33.517722] BUG: Bad rss-counter state mm:00000000d7bb1e3e type:MM_FILEPAGES val:33 [ 33.518617] BUG: Bad rss-counter state mm:00000000d7bb1e3e type:MM_ANONPAGES val:22 [ 33.973914] BUG: Bad rss-counter state mm:00000000aa2dd82e type:MM_FILEPAGES val:33 [ 33.975112] BUG: Bad rss-counter state mm:00000000aa2dd82e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60029' (ECDSA) to the list of known hosts. 2023/06/20 14:43:20 fuzzer started 2023/06/20 14:43:20 dialing manager at localhost:36067 2023/06/20 14:43:20 checking machine... 2023/06/20 14:43:20 checking revisions... [ 34.636636] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:43:20 testing simple program... [ 34.693547] cgroup: Unknown subsys name 'net' [ 34.738884] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:43:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002d6ae81 RSI=ffffffff816cb51b RDI=ffff888016b57408 RBP=ffff888016b574a0 RSP=ffff888016b573e0 R8 =0000000000000001 R9 =ffff888016b57448 R10=0000000000038001 R11=0000000000020d7b R12=ffff888016b574d0 R13=0000000000000000 R14=ffff88800d7a3680 R15=ffff888016b57408 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007f35545c5900 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=00007fa14de38650 CR3=000000000978c000 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=216830985e6ec7b1a0447f43530494ff XMM02=000000000011a2c0d59e07bde36eea69 XMM03=000000000011a3e8ec2efd57dc4c00df XMM04=1457b742975a607900000000000ae988 XMM05=a3a9352cd80d9cac0000000000132810 XMM06=59d5b690e0af863b00000000001316a8 XMM07=fb795ef6d65770560000000000121850 XMM08=2c67c8bc2e329bc3000000000011a3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88800f138140 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8182851d RBP=0000000000000040 RSP=ffff888019fff8f8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800f138000 R14=ffff888019fff970 R15=ffff88800f138140 RIP=ffffffff81835fe8 RFL=00000296 [--S-AP-] 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 00007fa14d883900 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=00007fa14de3b0b0 CR3=000000000ef1e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000