syzkaller login: [ 30.744883] BUG: Bad rss-counter state mm:00000000ce93925f type:MM_FILEPAGES val:33 [ 30.746058] BUG: Bad rss-counter state mm:00000000ce93925f type:MM_ANONPAGES val:22 [ 30.786553] ================================================================== [ 30.787449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.788401] Read of size 8 at addr ffff888019f954e0 by task sshd/219 [ 30.789183] [ 30.789401] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.790260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.791236] Call Trace: [ 30.791560] [ 30.791851] dump_stack_lvl+0x91/0xf0 [ 30.792346] print_report+0xcc/0x620 [ 30.792828] ? __virt_addr_valid+0x102/0x340 [ 30.793386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794635] kasan_report+0xbe/0xf0 [ 30.795237] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795885] vma_interval_tree_remove+0xc75/0xec0 [ 30.796481] vma_prepare+0xc54/0x11a0 [ 30.796968] __split_vma+0x5af/0x950 [ 30.797465] ? __pfx___split_vma+0x10/0x10 [ 30.797998] ? find_held_lock+0x2c/0x110 [ 30.798521] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.799085] ? lock_is_held_type+0x9f/0x120 [ 30.799628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.800250] ? mtree_range_walk+0x632/0x900 [ 30.800804] ? mas_walk+0x5c7/0x7c0 [ 30.801282] do_vmi_munmap+0x1f1/0x2b0 [ 30.801772] mmap_region+0x1f9/0x2660 [ 30.802262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.802769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.803475] ? __pfx_lock_acquire+0x10/0x10 [ 30.804018] ? __pfx_mmap_region+0x10/0x10 [ 30.804540] ? security_mmap_addr+0x7d/0xa0 [ 30.805075] ? get_unmapped_area+0x1f5/0x3f0 [ 30.805628] do_mmap+0x854/0xf00 [ 30.806073] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.806568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.807128] ksys_mmap_pgoff+0x3af/0x500 [ 30.807631] do_syscall_64+0x3f/0x90 [ 30.808135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808780] RIP: 0033:0x7fc795cbad82 [ 30.809235] 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 [ 30.811352] RSP: 002b:00007fff8a951988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.812259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc795cbad82 [ 30.813098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7950f4000 [ 30.813940] RBP: 00007fc7950f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.814786] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f7ce08b20 [ 30.815630] R13: 00007fff8a9519a0 R14: 00007fff8a9519d0 R15: 00007fff8a951d30 [ 30.816494] [ 30.816784] [ 30.816999] Allocated by task 212: [ 30.817429] kasan_save_stack+0x22/0x50 [ 30.817937] kasan_set_track+0x25/0x30 [ 30.818430] __kasan_slab_alloc+0x59/0x70 [ 30.818956] kmem_cache_alloc+0x16b/0x370 [ 30.819474] vm_area_dup+0x20/0x160 [ 30.819947] __split_vma+0x170/0x950 [ 30.820416] split_vma+0xc6/0x110 [ 30.820856] mprotect_fixup+0x8d2/0xb30 [ 30.821357] do_mprotect_pkey+0x87e/0xd40 [ 30.821872] __x64_sys_mprotect+0x78/0xc0 [ 30.822397] do_syscall_64+0x3f/0x90 [ 30.822872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823517] [ 30.823732] Freed by task 212: [ 30.824129] kasan_save_stack+0x22/0x50 [ 30.824629] kasan_set_track+0x25/0x30 [ 30.825120] kasan_save_free_info+0x2b/0x50 [ 30.825649] __kasan_slab_free+0x10a/0x190 [ 30.826189] kmem_cache_free+0x10d/0x4d0 [ 30.826698] rcu_core+0x8c8/0x2860 [ 30.827144] __do_softirq+0x1b7/0x7d4 [ 30.827623] [ 30.827852] Last potentially related work creation: [ 30.828448] kasan_save_stack+0x22/0x50 [ 30.828950] __kasan_record_aux_stack+0x8e/0xa0 [ 30.829519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.830167] remove_vma+0x139/0x170 [ 30.830619] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.831173] do_vmi_munmap+0x1f1/0x2b0 [ 30.831653] __vm_munmap+0x138/0x3a0 [ 30.832133] __x64_sys_munmap+0x59/0x80 [ 30.832623] do_syscall_64+0x3f/0x90 [ 30.833101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833742] [ 30.833958] The buggy address belongs to the object at ffff888019f95488 [ 30.833958] which belongs to the cache vm_area_struct of size 168 [ 30.835427] The buggy address is located 88 bytes inside of [ 30.835427] freed 168-byte region [ffff888019f95488, ffff888019f95530) [ 30.836886] [ 30.837107] The buggy address belongs to the physical page: [ 30.837763] page:00000000be2711dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f95 [ 30.838859] memcg:ffff888018f1c401 [ 30.839294] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.839951] page_type: 0xffffffff() [ 30.840403] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.841319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f1c401 [ 30.842220] page dumped because: kasan: bad access detected [ 30.842874] [ 30.843091] Memory state around the buggy address: [ 30.843663] ffff888019f95380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.844529] ffff888019f95400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.845381] >ffff888019f95480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.846242] ^ [ 30.846994] ffff888019f95500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.847863] ffff888019f95580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.848711] ================================================================== [ 30.849823] Disabling lock debugging due to kernel taint [ 32.968820] BUG: Bad rss-counter state mm:00000000bc947751 type:MM_FILEPAGES val:33 [ 32.970015] BUG: Bad rss-counter state mm:00000000bc947751 type:MM_ANONPAGES val:22 [ 33.377738] BUG: Bad rss-counter state mm:00000000ad7d8973 type:MM_FILEPAGES val:33 [ 33.378703] BUG: Bad rss-counter state mm:00000000ad7d8973 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51409' (ECDSA) to the list of known hosts. 2023/06/21 06:57:42 fuzzer started 2023/06/21 06:57:42 dialing manager at localhost:36067 2023/06/21 06:57:42 checking machine... 2023/06/21 06:57:42 checking revisions... [ 34.116083] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:57:43 testing simple program... [ 34.167916] cgroup: Unknown subsys name 'net' [ 34.220034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:57:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=1ffff11001f99f1b RSI=ffffffff8180f5bb RDI=ffff88800fccf898 RBP=ffff88800fccf8f0 RSP=ffff88800fccf828 R8 =ffffffff86138eb4 R9 =ffff88800fccf8d8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800fccf8f8 R13=ffff88800fccf8e0 R14=ffff88800fccf8d9 R15=ffff88800fccf898 RIP=ffffffff811306da 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 00007f840e5e2900 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=00007f840eb9a0b0 CR3=0000000016770000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007f07dd7758d0 CR3=000000000c462000 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=34f08be7aa868ab24148c810df06b2bc XMM02=000000000011da50ec2efd57dc4c00df XMM03=0000000000121ea0d1ca820f2b1afef5 XMM04=0cd580f4bccda88700000000000ae988 XMM05=164bfd16aef4f2f70000000000132440 XMM06=806171799158d9670000000000131e38 XMM07=e042d86d42eb936e0000000000122120 XMM08=d1ca820f2b1afef5000000000011dab0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000