syzkaller login: [ 37.381524] BUG: Bad rss-counter state mm:000000003004f875 type:MM_FILEPAGES val:33 [ 37.382538] BUG: Bad rss-counter state mm:000000003004f875 type:MM_ANONPAGES val:22 [ 37.543882] ================================================================== [ 37.544788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.545745] Read of size 8 at addr ffff88800d7b6310 by task sshd/219 [ 37.546629] [ 37.546845] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.547760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.548770] Call Trace: [ 37.549089] [ 37.549377] dump_stack_lvl+0x91/0xf0 [ 37.549879] print_report+0xcc/0x620 [ 37.550366] ? __virt_addr_valid+0x102/0x340 [ 37.550936] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.551604] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.552250] kasan_report+0xbe/0xf0 [ 37.552727] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.553356] vma_interval_tree_remove+0xc75/0xec0 [ 37.553966] vma_prepare+0xc54/0x11a0 [ 37.554444] __split_vma+0x5af/0x950 [ 37.554925] ? __pfx___split_vma+0x10/0x10 [ 37.555473] ? find_held_lock+0x2c/0x110 [ 37.556001] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.556564] ? lock_is_held_type+0x9f/0x120 [ 37.557095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.557707] ? mtree_range_walk+0x632/0x900 [ 37.558258] ? mas_walk+0x5c7/0x7c0 [ 37.558739] do_vmi_munmap+0x1f1/0x2b0 [ 37.559228] mmap_region+0x1f9/0x2660 [ 37.559732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.560245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.560961] ? __pfx_lock_acquire+0x10/0x10 [ 37.561511] ? __pfx_mmap_region+0x10/0x10 [ 37.562043] ? security_mmap_addr+0x7d/0xa0 [ 37.562577] ? get_unmapped_area+0x1f5/0x3f0 [ 37.563133] do_mmap+0x854/0xf00 [ 37.563617] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.564118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.564698] ksys_mmap_pgoff+0x3af/0x500 [ 37.565209] do_syscall_64+0x3f/0x90 [ 37.565698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.566345] RIP: 0033:0x7f09a5468d82 [ 37.566813] 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 [ 37.568990] RSP: 002b:00007ffc073cdc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.569921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09a5468d82 [ 37.570794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09a48a2000 [ 37.571675] RBP: 00007f09a48a2000 R08: 0000000000000009 R09: 0000000000001000 [ 37.572548] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa9774cec0 [ 37.573421] R13: 00007ffc073cdcb0 R14: 00007ffc073cdce0 R15: 00007ffc073ce040 [ 37.574295] [ 37.574592] [ 37.574816] Allocated by task 212: [ 37.575258] kasan_save_stack+0x22/0x50 [ 37.575798] kasan_set_track+0x25/0x30 [ 37.576300] __kasan_slab_alloc+0x59/0x70 [ 37.576841] kmem_cache_alloc+0x16b/0x370 [ 37.577366] vm_area_dup+0x20/0x160 [ 37.577825] __split_vma+0x170/0x950 [ 37.578303] split_vma+0xc6/0x110 [ 37.578755] mprotect_fixup+0x8d2/0xb30 [ 37.579266] do_mprotect_pkey+0x87e/0xd40 [ 37.579822] __x64_sys_mprotect+0x78/0xc0 [ 37.580352] do_syscall_64+0x3f/0x90 [ 37.580838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.581495] [ 37.581714] Freed by task 13: [ 37.582105] kasan_save_stack+0x22/0x50 [ 37.582626] kasan_set_track+0x25/0x30 [ 37.583132] kasan_save_free_info+0x2b/0x50 [ 37.583696] __kasan_slab_free+0x10a/0x190 [ 37.584232] kmem_cache_free+0x10d/0x4d0 [ 37.584752] rcu_core+0x8c8/0x2860 [ 37.585207] __do_softirq+0x1b7/0x7d4 [ 37.585698] [ 37.585922] Last potentially related work creation: [ 37.586521] kasan_save_stack+0x22/0x50 [ 37.587042] __kasan_record_aux_stack+0x8e/0xa0 [ 37.587645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.588305] remove_vma+0x139/0x170 [ 37.588773] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.589339] do_vmi_munmap+0x1f1/0x2b0 [ 37.589846] __vm_munmap+0x138/0x3a0 [ 37.590318] __x64_sys_munmap+0x59/0x80 [ 37.590818] do_syscall_64+0x3f/0x90 [ 37.591305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.591972] [ 37.592197] Second to last potentially related work creation: [ 37.592893] kasan_save_stack+0x22/0x50 [ 37.593403] __kasan_record_aux_stack+0x8e/0xa0 [ 37.593990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.594642] remove_vma+0x139/0x170 [ 37.595108] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.595687] do_vmi_munmap+0x1f1/0x2b0 [ 37.596190] mmap_region+0x1f9/0x2660 [ 37.596679] do_mmap+0x854/0xf00 [ 37.597112] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.597617] ksys_mmap_pgoff+0x3af/0x500 [ 37.598125] do_syscall_64+0x3f/0x90 [ 37.598606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.599255] [ 37.599489] The buggy address belongs to the object at ffff88800d7b62b8 [ 37.599489] which belongs to the cache vm_area_struct of size 168 [ 37.601000] The buggy address is located 88 bytes inside of [ 37.601000] freed 168-byte region [ffff88800d7b62b8, ffff88800d7b6360) [ 37.602439] [ 37.602663] The buggy address belongs to the physical page: [ 37.603347] page:0000000070c053be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7b6 [ 37.604447] memcg:ffff88800d3d9501 [ 37.604883] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.605604] page_type: 0xffffffff() [ 37.606057] raw: 0100000000000200 ffff88800879fc80 ffffea00003710c0 dead00000000000b [ 37.607008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3d9501 [ 37.607978] page dumped because: kasan: bad access detected [ 37.608668] [ 37.608895] Memory state around the buggy address: [ 37.609488] ffff88800d7b6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.610359] ffff88800d7b6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.611239] >ffff88800d7b6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.612130] ^ [ 37.612606] ffff88800d7b6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.613479] ffff88800d7b6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.614349] ================================================================== [ 37.615341] Disabling lock debugging due to kernel taint [ 39.307553] BUG: Bad rss-counter state mm:0000000094b35d7d type:MM_FILEPAGES val:33 [ 39.308564] BUG: Bad rss-counter state mm:0000000094b35d7d type:MM_ANONPAGES val:22 [ 39.770765] BUG: Bad rss-counter state mm:00000000b304dab6 type:MM_FILEPAGES val:33 [ 39.772003] BUG: Bad rss-counter state mm:00000000b304dab6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18652' (ECDSA) to the list of known hosts. 2023/06/19 11:19:18 fuzzer started 2023/06/19 11:19:18 dialing manager at localhost:44161 2023/06/19 11:19:18 checking machine... 2023/06/19 11:19:18 checking revisions... [ 40.412939] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:19:18 testing simple program... [ 40.468709] cgroup: Unknown subsys name 'net' [ 40.519803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:19:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f755bfdba50 CR3=0000000006800000 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=2038313a39313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff888016f5d1c0 RSI=ffffffff81143193 RDI=0000000000000007 RBP=000000001a2afa00 RSP=ffff88806cf09d78 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000080000 R14=ffffffff813782a8 R15=ffff88800e920d80 RIP=ffffffff814c07eb 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 00007fa0aa98e900 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=00007ffd891d6000 CR3=00000000166b0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000