syzkaller login: [ 30.608568] BUG: Bad rss-counter state mm:000000009f4bafbc type:MM_FILEPAGES val:33 [ 30.610486] BUG: Bad rss-counter state mm:000000009f4bafbc type:MM_ANONPAGES val:22 [ 30.768953] ================================================================== [ 30.769837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770784] Read of size 8 at addr ffff88800e9424e0 by task sshd/219 [ 30.771532] [ 30.771748] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.772801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.773768] Call Trace: [ 30.774163] [ 30.774550] dump_stack_lvl+0x91/0xf0 [ 30.775130] print_report+0xcc/0x620 [ 30.775700] ? __virt_addr_valid+0x102/0x340 [ 30.776343] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777060] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777810] kasan_report+0xbe/0xf0 [ 30.778369] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779117] vma_interval_tree_remove+0xc75/0xec0 [ 30.779823] vma_prepare+0xc54/0x11a0 [ 30.780383] __split_vma+0x5af/0x950 [ 30.781069] ? __pfx___split_vma+0x10/0x10 [ 30.781683] ? find_held_lock+0x2c/0x110 [ 30.782292] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782958] ? lock_is_held_type+0x9f/0x120 [ 30.783584] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.784296] ? mtree_range_walk+0x632/0x900 [ 30.784929] ? mas_walk+0x5c7/0x7c0 [ 30.785477] do_vmi_munmap+0x1f1/0x2b0 [ 30.786046] mmap_region+0x1f9/0x2660 [ 30.786625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.787117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.787812] ? __pfx_lock_acquire+0x10/0x10 [ 30.788327] ? __pfx_mmap_region+0x10/0x10 [ 30.788840] ? security_mmap_addr+0x7d/0xa0 [ 30.789346] ? get_unmapped_area+0x1f5/0x3f0 [ 30.789875] do_mmap+0x854/0xf00 [ 30.790296] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.791318] ksys_mmap_pgoff+0x3af/0x500 [ 30.791805] do_syscall_64+0x3f/0x90 [ 30.792265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792885] RIP: 0033:0x7f6fdc559d82 [ 30.793328] 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 [ 30.795390] RSP: 002b:00007ffd3c2b0488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.796261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6fdc559d82 [ 30.797075] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6fdb993000 [ 30.797887] RBP: 00007f6fdb993000 R08: 0000000000000009 R09: 0000000000001000 [ 30.798705] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597f31aed90 [ 30.799519] R13: 00007ffd3c2b04a0 R14: 00007ffd3c2b04d0 R15: 00007ffd3c2b0830 [ 30.800336] [ 30.800620] [ 30.800827] Allocated by task 212: [ 30.801236] kasan_save_stack+0x22/0x50 [ 30.801725] kasan_set_track+0x25/0x30 [ 30.802201] __kasan_slab_alloc+0x59/0x70 [ 30.802713] kmem_cache_alloc+0x16b/0x370 [ 30.803209] vm_area_dup+0x20/0x160 [ 30.803646] __split_vma+0x170/0x950 [ 30.804099] split_vma+0xc6/0x110 [ 30.804525] mprotect_fixup+0x8d2/0xb30 [ 30.805012] do_mprotect_pkey+0x87e/0xd40 [ 30.805515] __x64_sys_mprotect+0x78/0xc0 [ 30.806023] do_syscall_64+0x3f/0x90 [ 30.806498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807113] [ 30.807320] Freed by task 212: [ 30.807699] kasan_save_stack+0x22/0x50 [ 30.808189] kasan_set_track+0x25/0x30 [ 30.808669] kasan_save_free_info+0x2b/0x50 [ 30.809180] __kasan_slab_free+0x10a/0x190 [ 30.809694] kmem_cache_free+0x10d/0x4d0 [ 30.810180] rcu_core+0x8c8/0x2860 [ 30.810632] __do_softirq+0x1b7/0x7d4 [ 30.811098] [ 30.811307] Last potentially related work creation: [ 30.811875] kasan_save_stack+0x22/0x50 [ 30.812362] __kasan_record_aux_stack+0x8e/0xa0 [ 30.812924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.813541] remove_vma+0x139/0x170 [ 30.813976] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.814528] do_vmi_munmap+0x1f1/0x2b0 [ 30.814998] __vm_munmap+0x138/0x3a0 [ 30.815456] __x64_sys_munmap+0x59/0x80 [ 30.815949] do_syscall_64+0x3f/0x90 [ 30.816403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817016] [ 30.817228] Second to last potentially related work creation: [ 30.817882] kasan_save_stack+0x22/0x50 [ 30.818365] __kasan_record_aux_stack+0x8e/0xa0 [ 30.818934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.819551] remove_vma+0x139/0x170 [ 30.819988] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.820527] do_vmi_munmap+0x1f1/0x2b0 [ 30.820995] mmap_region+0x1f9/0x2660 [ 30.821453] do_mmap+0x854/0xf00 [ 30.821869] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.822342] ksys_mmap_pgoff+0x3af/0x500 [ 30.822842] do_syscall_64+0x3f/0x90 [ 30.823304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823923] [ 30.824136] The buggy address belongs to the object at ffff88800e942488 [ 30.824136] which belongs to the cache vm_area_struct of size 168 [ 30.825555] The buggy address is located 88 bytes inside of [ 30.825555] freed 168-byte region [ffff88800e942488, ffff88800e942530) [ 30.826909] [ 30.827118] The buggy address belongs to the physical page: [ 30.827752] page:00000000bd703663 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe942 [ 30.828793] memcg:ffff88800e4d2701 [ 30.829207] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.829829] page_type: 0xffffffff() [ 30.830269] raw: 0100000000000200 ffff88800879fc80 ffffea0000399480 dead000000000004 [ 30.831164] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4d2701 [ 30.832031] page dumped because: kasan: bad access detected [ 30.832667] [ 30.832875] Memory state around the buggy address: [ 30.833432] ffff88800e942380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.834260] ffff88800e942400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.835095] >ffff88800e942480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.835916] ^ [ 30.836640] ffff88800e942500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.837469] ffff88800e942580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.838282] ================================================================== [ 30.839578] Disabling lock debugging due to kernel taint [ 32.778143] BUG: Bad rss-counter state mm:00000000c0b015d3 type:MM_FILEPAGES val:33 [ 32.779177] BUG: Bad rss-counter state mm:00000000c0b015d3 type:MM_ANONPAGES val:22 [ 33.347002] BUG: Bad rss-counter state mm:00000000cf518b24 type:MM_FILEPAGES val:33 [ 33.348208] BUG: Bad rss-counter state mm:00000000cf518b24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27196' (ECDSA) to the list of known hosts. 2023/06/19 23:08:19 fuzzer started 2023/06/19 23:08:19 dialing manager at localhost:44161 2023/06/19 23:08:19 checking machine... 2023/06/19 23:08:19 checking revisions... [ 33.991631] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:08:19 testing simple program... [ 34.050102] cgroup: Unknown subsys name 'net' [ 34.111995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:08:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180ee7d RDX=00000000000080ee RSI=00000000000080ee RDI=ffffffff86507f78 RBP=ffff88800c427578 RSP=ffff88800c4274b0 R8 =0000000000000000 R9 =ffff88800c427560 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800c427580 R13=ffff88800c427568 R14=ffff88800c427561 R15=ffff88800c427520 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f9b8d2b5900 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=00007f9b8d86c618 CR3=000000000e854000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f218a81fc28 CR3=000000000c99c000 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=4e202cdd88deaba78241ac2b9b03cd5d XMM02=ec2efd57dc4c00df000000000011fef8 XMM03=832e46afbcaae359000000000011ffc8 XMM04=12c937b6e34bf2d500000000000ae988 XMM05=2a90d20f85efdd450000000000136020 XMM06=806171799158d9670000000000135448 XMM07=e042d86d42eb936e0000000000124988 XMM08=832e46afbcaae359000000000011ffc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000