syzkaller login: [ 30.992290] BUG: Bad rss-counter state mm:0000000086b6ae2c type:MM_FILEPAGES val:33 [ 30.993488] BUG: Bad rss-counter state mm:0000000086b6ae2c type:MM_ANONPAGES val:22 [ 31.028971] ================================================================== [ 31.030059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.031085] Read of size 8 at addr ffff88800e08d880 by task sshd/219 [ 31.032026] [ 31.032241] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.033203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.034279] Call Trace: [ 31.034645] [ 31.034927] dump_stack_lvl+0x91/0xf0 [ 31.035420] print_report+0xcc/0x620 [ 31.035909] ? __virt_addr_valid+0x102/0x340 [ 31.036523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037200] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037858] kasan_report+0xbe/0xf0 [ 31.038419] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.039080] vma_interval_tree_remove+0xc75/0xec0 [ 31.039674] vma_prepare+0xc54/0x11a0 [ 31.040222] __split_vma+0x5af/0x950 [ 31.040699] ? __pfx___split_vma+0x10/0x10 [ 31.041238] ? find_held_lock+0x2c/0x110 [ 31.041827] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.042499] ? lock_is_held_type+0x9f/0x120 [ 31.043070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.043670] ? mtree_range_walk+0x632/0x900 [ 31.044221] ? mas_walk+0x5c7/0x7c0 [ 31.044694] do_vmi_munmap+0x1f1/0x2b0 [ 31.045211] mmap_region+0x1f9/0x2660 [ 31.045698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.046218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.046926] ? __pfx_lock_acquire+0x10/0x10 [ 31.047460] ? __pfx_mmap_region+0x10/0x10 [ 31.047982] ? security_mmap_addr+0x7d/0xa0 [ 31.048521] ? get_unmapped_area+0x1f5/0x3f0 [ 31.049076] do_mmap+0x854/0xf00 [ 31.049513] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.050012] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.050574] ksys_mmap_pgoff+0x3af/0x500 [ 31.051076] do_syscall_64+0x3f/0x90 [ 31.051552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.052203] RIP: 0033:0x7f8f5d12bd82 [ 31.052658] 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 [ 31.054777] RSP: 002b:00007ffefd9519d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.055676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f5d12bd82 [ 31.056525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f5c565000 [ 31.057382] RBP: 00007f8f5c565000 R08: 0000000000000009 R09: 0000000000001000 [ 31.058218] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c8d3f9ec0 [ 31.059061] R13: 00007ffefd9519f0 R14: 00007ffefd951a20 R15: 00007ffefd951d80 [ 31.059918] [ 31.060209] [ 31.060422] Allocated by task 212: [ 31.060865] kasan_save_stack+0x22/0x50 [ 31.061369] kasan_set_track+0x25/0x30 [ 31.061858] __kasan_slab_alloc+0x59/0x70 [ 31.062375] kmem_cache_alloc+0x16b/0x370 [ 31.062891] vm_area_dup+0x20/0x160 [ 31.063343] __split_vma+0x170/0x950 [ 31.063804] split_vma+0xc6/0x110 [ 31.064243] mprotect_fixup+0x8d2/0xb30 [ 31.064775] do_mprotect_pkey+0x87e/0xd40 [ 31.065291] __x64_sys_mprotect+0x78/0xc0 [ 31.065818] do_syscall_64+0x3f/0x90 [ 31.066291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066933] [ 31.067147] Freed by task 212: [ 31.067541] kasan_save_stack+0x22/0x50 [ 31.068041] kasan_set_track+0x25/0x30 [ 31.068537] kasan_save_free_info+0x2b/0x50 [ 31.069079] __kasan_slab_free+0x10a/0x190 [ 31.069612] kmem_cache_free+0x10d/0x4d0 [ 31.070193] rcu_core+0x8c8/0x2860 [ 31.070635] __do_softirq+0x1b7/0x7d4 [ 31.071111] [ 31.071323] Last potentially related work creation: [ 31.071906] kasan_save_stack+0x22/0x50 [ 31.072408] __kasan_record_aux_stack+0x8e/0xa0 [ 31.072993] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.073627] remove_vma+0x139/0x170 [ 31.074089] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.074642] do_vmi_munmap+0x1f1/0x2b0 [ 31.075125] __vm_munmap+0x138/0x3a0 [ 31.075590] __x64_sys_munmap+0x59/0x80 [ 31.076086] do_syscall_64+0x3f/0x90 [ 31.076558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077210] [ 31.077429] Second to last potentially related work creation: [ 31.078113] kasan_save_stack+0x22/0x50 [ 31.078615] __kasan_record_aux_stack+0x8e/0xa0 [ 31.079186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.079833] remove_vma+0x139/0x170 [ 31.080283] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.080841] do_vmi_munmap+0x1f1/0x2b0 [ 31.081321] __vm_munmap+0x138/0x3a0 [ 31.081786] __x64_sys_munmap+0x59/0x80 [ 31.082282] do_syscall_64+0x3f/0x90 [ 31.082754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083404] [ 31.083617] The buggy address belongs to the object at ffff88800e08d828 [ 31.083617] which belongs to the cache vm_area_struct of size 168 [ 31.085090] The buggy address is located 88 bytes inside of [ 31.085090] freed 168-byte region [ffff88800e08d828, ffff88800e08d8d0) [ 31.086495] [ 31.086710] The buggy address belongs to the physical page: [ 31.087367] page:00000000fbecf160 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe08d [ 31.088439] memcg:ffff888009aa2101 [ 31.088869] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.089513] page_type: 0xffffffff() [ 31.089962] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381740 dead000000000004 [ 31.090872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009aa2101 [ 31.091770] page dumped because: kasan: bad access detected [ 31.092423] [ 31.092636] Memory state around the buggy address: [ 31.093232] ffff88800e08d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.094084] ffff88800e08d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.094944] >ffff88800e08d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.095795] ^ [ 31.096203] ffff88800e08d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.097062] ffff88800e08d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.097930] ================================================================== [ 31.098923] Disabling lock debugging due to kernel taint [ 33.032884] BUG: Bad rss-counter state mm:0000000039db068d type:MM_FILEPAGES val:33 [ 33.033876] BUG: Bad rss-counter state mm:0000000039db068d type:MM_ANONPAGES val:22 [ 33.476623] BUG: Bad rss-counter state mm:0000000009877eb3 type:MM_FILEPAGES val:33 [ 33.477400] BUG: Bad rss-counter state mm:0000000009877eb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64012' (ECDSA) to the list of known hosts. 2023/06/20 18:50:28 fuzzer started 2023/06/20 18:50:28 dialing manager at localhost:36067 2023/06/20 18:50:28 checking machine... 2023/06/20 18:50:28 checking revisions... [ 34.151613] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:50:28 testing simple program... [ 34.199199] cgroup: Unknown subsys name 'net' [ 34.246071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:27 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff813782f8 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800edc8a00 RIP=ffffffff84538440 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 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=00007ffc898a7818 CR3=0000000005482000 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=00007fd2d18dd51000005603c10a9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfb69 RBX=ffffffff85dfdb48 RCX=ffffffff818088f6 RDX=0000000000000001 RSI=ffffffff8613873c RDI=ffffffff85dfdb3c RBP=ffffffff85dfdb48 RSP=ffff88801654f9f8 R8 =ffffffff8613873c R9 =ffff88801654faf0 R10=0000000000038001 R11=0000000000020c5e R12=ffffffff85dfdb4c R13=ffffffff85dfdb3c R14=ffffffff85dfdb44 R15=dffffc0000000000 RIP=ffffffff8112fc7a 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 00007fcca95a3900 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=00007fff4141d000 CR3=0000000009c4e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000