syzkaller login: [ 30.146022] BUG: Bad rss-counter state mm:00000000f26d2f7b type:MM_FILEPAGES val:33 [ 30.147091] BUG: Bad rss-counter state mm:00000000f26d2f7b type:MM_ANONPAGES val:22 [ 30.328733] ================================================================== [ 30.329753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.330886] Read of size 8 at addr ffff88800f0026b0 by task sshd/219 [ 30.331740] [ 30.331982] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.332958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.334024] Call Trace: [ 30.334381] [ 30.334700] dump_stack_lvl+0x91/0xf0 [ 30.335242] print_report+0xcc/0x620 [ 30.335794] ? __virt_addr_valid+0x102/0x340 [ 30.336412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337792] kasan_report+0xbe/0xf0 [ 30.338326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.339027] vma_interval_tree_remove+0xc75/0xec0 [ 30.339707] vma_prepare+0xc54/0x11a0 [ 30.340242] __split_vma+0x5af/0x950 [ 30.340775] ? __pfx___split_vma+0x10/0x10 [ 30.341376] ? find_held_lock+0x2c/0x110 [ 30.341955] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.342593] ? lock_is_held_type+0x9f/0x120 [ 30.343195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.343882] ? mtree_range_walk+0x632/0x900 [ 30.344513] ? mas_walk+0x5c7/0x7c0 [ 30.345041] do_vmi_munmap+0x1f1/0x2b0 [ 30.345599] mmap_region+0x1f9/0x2660 [ 30.346139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.346716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.347639] ? __pfx_lock_acquire+0x10/0x10 [ 30.348332] ? __pfx_mmap_region+0x10/0x10 [ 30.348981] ? security_mmap_addr+0x7d/0xa0 [ 30.349636] ? get_unmapped_area+0x1f5/0x3f0 [ 30.350311] do_mmap+0x854/0xf00 [ 30.350848] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.351499] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.352177] ksys_mmap_pgoff+0x3af/0x500 [ 30.352685] do_syscall_64+0x3f/0x90 [ 30.353174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353828] RIP: 0033:0x7fb8e3b01d82 [ 30.354297] 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 [ 30.356484] RSP: 002b:00007ffeaa2b1778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.357395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8e3b01d82 [ 30.358267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8e2f3b000 [ 30.359123] RBP: 00007fb8e2f3b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.359990] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581b2585980 [ 30.360861] R13: 00007ffeaa2b1790 R14: 00007ffeaa2b17c0 R15: 00007ffeaa2b1b20 [ 30.361718] [ 30.362019] [ 30.362247] Allocated by task 212: [ 30.362672] kasan_save_stack+0x22/0x50 [ 30.363184] kasan_set_track+0x25/0x30 [ 30.363705] __kasan_slab_alloc+0x59/0x70 [ 30.364231] kmem_cache_alloc+0x16b/0x370 [ 30.364748] vm_area_dup+0x20/0x160 [ 30.365207] __split_vma+0x170/0x950 [ 30.365677] split_vma+0xc6/0x110 [ 30.366116] mprotect_fixup+0x8d2/0xb30 [ 30.366614] do_mprotect_pkey+0x87e/0xd40 [ 30.367137] __x64_sys_mprotect+0x78/0xc0 [ 30.367664] do_syscall_64+0x3f/0x90 [ 30.368145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368787] [ 30.369005] Freed by task 19: [ 30.369385] kasan_save_stack+0x22/0x50 [ 30.369892] kasan_set_track+0x25/0x30 [ 30.370384] kasan_save_free_info+0x2b/0x50 [ 30.370920] __kasan_slab_free+0x10a/0x190 [ 30.371476] kmem_cache_free+0x10d/0x4d0 [ 30.371995] rcu_core+0x8c8/0x2860 [ 30.372438] __do_softirq+0x1b7/0x7d4 [ 30.372912] [ 30.373127] Last potentially related work creation: [ 30.373715] kasan_save_stack+0x22/0x50 [ 30.374214] __kasan_record_aux_stack+0x8e/0xa0 [ 30.374796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.375451] remove_vma+0x139/0x170 [ 30.375907] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.376457] do_vmi_munmap+0x1f1/0x2b0 [ 30.376941] __vm_munmap+0x138/0x3a0 [ 30.377409] __x64_sys_munmap+0x59/0x80 [ 30.377902] do_syscall_64+0x3f/0x90 [ 30.378374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379011] [ 30.379230] The buggy address belongs to the object at ffff88800f002658 [ 30.379230] which belongs to the cache vm_area_struct of size 168 [ 30.380696] The buggy address is located 88 bytes inside of [ 30.380696] freed 168-byte region [ffff88800f002658, ffff88800f002700) [ 30.382089] [ 30.382310] The buggy address belongs to the physical page: [ 30.382970] page:0000000024777eca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf002 [ 30.384069] memcg:ffff88800e604b01 [ 30.384491] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.385131] page_type: 0xffffffff() [ 30.385583] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.386493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e604b01 [ 30.387397] page dumped because: kasan: bad access detected [ 30.388049] [ 30.388269] Memory state around the buggy address: [ 30.388844] ffff88800f002580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.389700] ffff88800f002600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.390560] >ffff88800f002680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.391415] ^ [ 30.392001] ffff88800f002700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.392858] ffff88800f002780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.393707] ================================================================== [ 30.394774] Disabling lock debugging due to kernel taint [ 32.458579] BUG: Bad rss-counter state mm:00000000d34fcf23 type:MM_FILEPAGES val:33 [ 32.459809] BUG: Bad rss-counter state mm:00000000d34fcf23 type:MM_ANONPAGES val:22 [ 32.836215] BUG: Bad rss-counter state mm:0000000031a09b82 type:MM_FILEPAGES val:33 [ 32.837238] BUG: Bad rss-counter state mm:0000000031a09b82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55288' (ECDSA) to the list of known hosts. 2023/06/20 17:55:23 fuzzer started 2023/06/20 17:55:24 dialing manager at localhost:36067 2023/06/20 17:55:24 checking machine... 2023/06/20 17:55:24 checking revisions... [ 33.555067] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:55:24 testing simple program... [ 33.607810] cgroup: Unknown subsys name 'net' [ 33.645712] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:55:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880193051f0 RCX=ffffffff81b287c5 RDX=ffff88800df13680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888019304f40 RSP=ffff8880141e7610 R8 =0000000000000006 R9 =0000000000000004 R10=0000000000000004 R11=0000000000000000 R12=ffff8880163b7b00 R13=ffff88800fee0000 R14=ffff88800fee0738 R15=ffff8880141e7688 RIP=ffffffff814c0408 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 00007f2ec1a31700 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=00007fdc1c078560 CR3=000000000ded4000 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=2033323a35353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a35353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000365e40 RBX=ffff88800d979e00 RCX=ffffea0000365e01 RDX=ffff88808d979e00 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88800ee4fc28 R8 =ffff88800d979e00 R9 =0000000000000000 R10=ffffffff85d3d357 R11=000000000010000f R12=dffffc0000000000 R13=ffff88800ee4fc68 R14=0000000000000000 R15=ffff88800d978400 RIP=ffffffff81810393 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 00007f82c916b900 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=00007ffcb73a5000 CR3=000000000f10e000 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