syzkaller login: [ 31.085542] BUG: Bad rss-counter state mm:000000009fd5b458 type:MM_FILEPAGES val:33 [ 31.086796] BUG: Bad rss-counter state mm:000000009fd5b458 type:MM_ANONPAGES val:22 [ 31.252153] ================================================================== [ 31.253097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.254059] Read of size 8 at addr ffff88801a4bad08 by task sshd/219 [ 31.254824] [ 31.255043] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.256142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.257133] Call Trace: [ 31.257464] [ 31.257792] dump_stack_lvl+0x91/0xf0 [ 31.258289] print_report+0xcc/0x620 [ 31.258775] ? __virt_addr_valid+0x102/0x340 [ 31.259333] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260576] kasan_report+0xbe/0xf0 [ 31.261059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261688] vma_interval_tree_remove+0xc75/0xec0 [ 31.262295] vma_prepare+0xc54/0x11a0 [ 31.262777] __split_vma+0x5af/0x950 [ 31.263251] ? __pfx___split_vma+0x10/0x10 [ 31.263776] ? find_held_lock+0x2c/0x110 [ 31.264303] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.264863] ? lock_is_held_type+0x9f/0x120 [ 31.265404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.266026] ? mtree_range_walk+0x632/0x900 [ 31.266576] ? mas_walk+0x5c7/0x7c0 [ 31.267059] do_vmi_munmap+0x1f1/0x2b0 [ 31.267549] mmap_region+0x1f9/0x2660 [ 31.268038] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.268547] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.269260] ? __pfx_lock_acquire+0x10/0x10 [ 31.269821] ? __pfx_mmap_region+0x10/0x10 [ 31.270351] ? security_mmap_addr+0x7d/0xa0 [ 31.270879] ? get_unmapped_area+0x1f5/0x3f0 [ 31.271433] do_mmap+0x854/0xf00 [ 31.271870] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.272936] ksys_mmap_pgoff+0x3af/0x500 [ 31.273445] do_syscall_64+0x3f/0x90 [ 31.273936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274582] RIP: 0033:0x7f515c6d1d82 [ 31.275043] 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 [ 31.277152] RSP: 002b:00007ffdfca40608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.278065] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f515c6d1d82 [ 31.278911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f515bb0b000 [ 31.279764] RBP: 00007f515bb0b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.280605] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbbe0c0ec0 [ 31.281448] R13: 00007ffdfca40620 R14: 00007ffdfca40650 R15: 00007ffdfca409b0 [ 31.282319] [ 31.282610] [ 31.282827] Allocated by task 212: [ 31.283254] kasan_save_stack+0x22/0x50 [ 31.283755] kasan_set_track+0x25/0x30 [ 31.284253] __kasan_slab_alloc+0x59/0x70 [ 31.284775] kmem_cache_alloc+0x16b/0x370 [ 31.285297] vm_area_dup+0x20/0x160 [ 31.285767] __split_vma+0x170/0x950 [ 31.286233] split_vma+0xc6/0x110 [ 31.286671] mprotect_fixup+0x8d2/0xb30 [ 31.287187] do_mprotect_pkey+0x87e/0xd40 [ 31.287707] __x64_sys_mprotect+0x78/0xc0 [ 31.288236] do_syscall_64+0x3f/0x90 [ 31.288713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289365] [ 31.289597] Freed by task 212: [ 31.289991] kasan_save_stack+0x22/0x50 [ 31.290493] kasan_set_track+0x25/0x30 [ 31.290985] kasan_save_free_info+0x2b/0x50 [ 31.291518] __kasan_slab_free+0x10a/0x190 [ 31.292055] kmem_cache_free+0x10d/0x4d0 [ 31.292560] rcu_core+0x8c8/0x2860 [ 31.293003] __do_softirq+0x1b7/0x7d4 [ 31.293487] [ 31.293714] Last potentially related work creation: [ 31.294301] kasan_save_stack+0x22/0x50 [ 31.294801] __kasan_record_aux_stack+0x8e/0xa0 [ 31.295382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296025] remove_vma+0x139/0x170 [ 31.296556] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297114] do_vmi_munmap+0x1f1/0x2b0 [ 31.297617] __vm_munmap+0x138/0x3a0 [ 31.298085] __x64_sys_munmap+0x59/0x80 [ 31.298581] do_syscall_64+0x3f/0x90 [ 31.299067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299716] [ 31.299933] The buggy address belongs to the object at ffff88801a4bacb0 [ 31.299933] which belongs to the cache vm_area_struct of size 168 [ 31.301392] The buggy address is located 88 bytes inside of [ 31.301392] freed 168-byte region [ffff88801a4bacb0, ffff88801a4bad58) [ 31.302800] [ 31.303021] The buggy address belongs to the physical page: [ 31.303679] page:00000000313741ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a4ba [ 31.304763] memcg:ffff888017f6a401 [ 31.305191] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.305844] page_type: 0xffffffff() [ 31.306302] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.307221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f6a401 [ 31.308143] page dumped because: kasan: bad access detected [ 31.308800] [ 31.309019] Memory state around the buggy address: [ 31.309618] ffff88801a4bac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.310469] ffff88801a4bac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.311327] >ffff88801a4bad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.312186] ^ [ 31.312623] ffff88801a4bad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.313499] ffff88801a4bae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.314380] ================================================================== [ 31.315330] Disabling lock debugging due to kernel taint [ 33.217372] BUG: Bad rss-counter state mm:00000000cc618b77 type:MM_FILEPAGES val:33 [ 33.218413] BUG: Bad rss-counter state mm:00000000cc618b77 type:MM_ANONPAGES val:22 [ 33.696180] BUG: Bad rss-counter state mm:000000009a8a96b6 type:MM_FILEPAGES val:33 [ 33.697173] BUG: Bad rss-counter state mm:000000009a8a96b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18266' (ECDSA) to the list of known hosts. 2023/06/20 23:15:37 fuzzer started 2023/06/20 23:15:37 dialing manager at localhost:36067 2023/06/20 23:15:37 checking machine... 2023/06/20 23:15:37 checking revisions... [ 34.401115] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:15:37 testing simple program... [ 34.453193] cgroup: Unknown subsys name 'net' [ 34.501796] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:37 Registers: info registers vcpu 0 RAX=1ffffffff0f6f1c0 RBX=ffff888008441500 RCX=ffffffff812d86ea RDX=dffffc0000000000 RSI=0000000000000dc0 RDI=ffff888008441500 RBP=ffff888017d27ca0 RSP=ffff888017d27c20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008441500 R13=0000000000000dc0 R14=0000000000000001 R15=ffff8880094cb800 RIP=ffffffff81810c75 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 00007fd378f86900 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=00007fd37953b650 CR3=000000000c4e8000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fff80687eb8 CR3=0000000018c9c000 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=2037333a35313a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000