syzkaller login: [ 36.625017] BUG: Bad rss-counter state mm:000000002b406fda type:MM_FILEPAGES val:33 [ 36.625756] BUG: Bad rss-counter state mm:000000002b406fda type:MM_ANONPAGES val:22 [ 36.829838] ================================================================== [ 36.830463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.831075] Read of size 8 at addr ffff8880168393f8 by task sshd/221 [ 36.831681] [ 36.831831] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.832400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.833061] Call Trace: [ 36.833280] [ 36.833472] dump_stack_lvl+0x91/0xf0 [ 36.833803] print_report+0xcc/0x620 [ 36.834122] ? __virt_addr_valid+0x102/0x340 [ 36.834497] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.834914] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.835351] kasan_report+0xbe/0xf0 [ 36.836037] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.836497] vma_interval_tree_remove+0xc75/0xec0 [ 36.836923] vma_prepare+0xc54/0x11a0 [ 36.837256] __split_vma+0x5af/0x950 [ 36.837580] ? __pfx___split_vma+0x10/0x10 [ 36.837940] ? find_held_lock+0x2c/0x110 [ 36.838306] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.838691] ? lock_is_held_type+0x9f/0x120 [ 36.839050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.840223] ? mtree_range_walk+0x632/0x900 [ 36.840608] ? mas_walk+0x5c7/0x7c0 [ 36.840921] do_vmi_munmap+0x1f1/0x2b0 [ 36.841261] mmap_region+0x1f9/0x2660 [ 36.841599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.841941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.842409] ? __pfx_lock_acquire+0x10/0x10 [ 36.842764] ? __pfx_mmap_region+0x10/0x10 [ 36.843118] ? security_mmap_addr+0x7d/0xa0 [ 36.844982] ? get_unmapped_area+0x1f5/0x3f0 [ 36.845350] do_mmap+0x854/0xf00 [ 36.845650] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.845989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.846357] ksys_mmap_pgoff+0x3af/0x500 [ 36.846730] do_syscall_64+0x3f/0x90 [ 36.847086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.847576] RIP: 0033:0x7f442819bd82 [ 36.847903] 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 [ 36.849391] RSP: 002b:00007ffe33d7f978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.850023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f442819bd82 [ 36.850620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44275d5000 [ 36.851213] RBP: 00007f44275d5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.851836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d34533ec0 [ 36.852462] R13: 00007ffe33d7f990 R14: 00007ffe33d7f9c0 R15: 00007ffe33d7fd20 [ 36.853945] [ 36.854487] [ 36.854868] Allocated by task 212: [ 36.855783] kasan_save_stack+0x22/0x50 [ 36.856772] kasan_set_track+0x25/0x30 [ 36.857673] __kasan_slab_alloc+0x59/0x70 [ 36.858614] kmem_cache_alloc+0x16b/0x370 [ 36.859589] vm_area_dup+0x20/0x160 [ 36.860449] __split_vma+0x170/0x950 [ 36.861343] split_vma+0xc6/0x110 [ 36.862218] mprotect_fixup+0x8d2/0xb30 [ 36.863177] do_mprotect_pkey+0x87e/0xd40 [ 36.864191] __x64_sys_mprotect+0x78/0xc0 [ 36.865210] do_syscall_64+0x3f/0x90 [ 36.866124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.867434] [ 36.867834] Freed by task 203: [ 36.868601] kasan_save_stack+0x22/0x50 [ 36.869597] kasan_set_track+0x25/0x30 [ 36.870555] kasan_save_free_info+0x2b/0x50 [ 36.871680] __kasan_slab_free+0x10a/0x190 [ 36.872723] kmem_cache_free+0x10d/0x4d0 [ 36.873709] rcu_core+0x8c8/0x2860 [ 36.874553] __do_softirq+0x1b7/0x7d4 [ 36.875523] [ 36.875900] Last potentially related work creation: [ 36.877047] kasan_save_stack+0x22/0x50 [ 36.878015] __kasan_record_aux_stack+0x8e/0xa0 [ 36.879124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.880375] remove_vma+0x139/0x170 [ 36.881333] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.882480] do_vmi_munmap+0x1f1/0x2b0 [ 36.883377] __vm_munmap+0x138/0x3a0 [ 36.884195] __x64_sys_munmap+0x59/0x80 [ 36.885112] do_syscall_64+0x3f/0x90 [ 36.885980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.887175] [ 36.887572] The buggy address belongs to the object at ffff8880168393a0 [ 36.887572] which belongs to the cache vm_area_struct of size 168 [ 36.890499] The buggy address is located 88 bytes inside of [ 36.890499] freed 168-byte region [ffff8880168393a0, ffff888016839448) [ 36.893382] [ 36.893758] The buggy address belongs to the physical page: [ 36.895082] page:000000002338fded refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16839 [ 36.897318] memcg:ffff888016836101 [ 36.898200] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.899643] page_type: 0xffffffff() [ 36.900549] raw: 0100000000000200 ffff88800879fc80 ffffea0000678b80 dead000000000005 [ 36.902401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016836101 [ 36.904254] page dumped because: kasan: bad access detected [ 36.905564] [ 36.905950] Memory state around the buggy address: [ 36.907058] ffff888016839280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.908736] ffff888016839300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.910447] >ffff888016839380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.912168] ^ [ 36.913842] ffff888016839400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.923728] ffff888016839480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.924317] ================================================================== [ 36.925052] Disabling lock debugging due to kernel taint [ 38.790868] BUG: Bad rss-counter state mm:0000000076df83c1 type:MM_FILEPAGES val:33 [ 38.791633] BUG: Bad rss-counter state mm:0000000076df83c1 type:MM_ANONPAGES val:22 [ 39.164161] BUG: Bad rss-counter state mm:000000009dc3c165 type:MM_FILEPAGES val:33 [ 39.164930] BUG: Bad rss-counter state mm:000000009dc3c165 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22720' (ECDSA) to the list of known hosts. 2023/06/20 00:09:23 fuzzer started 2023/06/20 00:09:24 dialing manager at localhost:44161 2023/06/20 00:09:24 checking machine... 2023/06/20 00:09:24 checking revisions... [ 39.829624] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:09:24 testing simple program... [ 39.873430] cgroup: Unknown subsys name 'net' [ 39.923992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:09:21 Registers: info registers vcpu 0 RAX=ffffe8ffffc14810 RBX=000000000002c3c0 RCX=1ffffd1ffff82909 RDX=dffffc0000000000 RSI=ffffffff814533fc RDI=ffffe8ffffc14848 RBP=ffffffff852c5900 RSP=ffff888016ed7b10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888013db5000 R13=0000000000000000 R14=ffff88806ce00000 R15=ffff888013db53a8 RIP=ffffffff81453466 RFL=00000046 [---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 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=00007f3f7308c328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d2b1960 RCX=ffff88806c468710 RDX=0000000000000000 RSI=ffff88800d2b1960 RDI=ffff8880087b03c0 RBP=ffff8880087b03c0 RSP=ffff888016ed7c58 R8 =00000000a07b83a0 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b03c0 R13=ffffea000034ac40 R14=ffffffff81ef13be R15=ffff88800d4e8b80 RIP=ffffffff8180f2cb RFL=00000286 [--S--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 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=00007ffdbf96be38 CR3=000000000ea8a000 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=2033323a39303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a39303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000