syzkaller login: [ 67.650273] BUG: Bad rss-counter state mm:00000000368cffb8 type:MM_FILEPAGES val:33 [ 67.651289] BUG: Bad rss-counter state mm:00000000368cffb8 type:MM_ANONPAGES val:22 [ 67.830967] ================================================================== [ 67.831958] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.832992] Read of size 8 at addr ffff888019ec1b38 by task sshd/219 [ 67.833916] [ 67.834154] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.835280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.836356] Call Trace: [ 67.836713] [ 67.837022] dump_stack_lvl+0x91/0xf0 [ 67.837559] print_report+0xcc/0x620 [ 67.838091] ? __virt_addr_valid+0x102/0x340 [ 67.838702] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.839377] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.840044] kasan_report+0xbe/0xf0 [ 67.840578] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.841245] vma_interval_tree_remove+0xc75/0xec0 [ 67.841906] vma_prepare+0xc54/0x11a0 [ 67.842428] __split_vma+0x5af/0x950 [ 67.842943] ? __pfx___split_vma+0x10/0x10 [ 67.843519] ? find_held_lock+0x2c/0x110 [ 67.844087] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.844713] ? lock_is_held_type+0x9f/0x120 [ 67.845300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.845956] ? mtree_range_walk+0x632/0x900 [ 67.846565] ? mas_walk+0x5c7/0x7c0 [ 67.847080] do_vmi_munmap+0x1f1/0x2b0 [ 67.847622] mmap_region+0x1f9/0x2660 [ 67.848159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.848735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.849531] ? __pfx_lock_acquire+0x10/0x10 [ 67.850128] ? __pfx_mmap_region+0x10/0x10 [ 67.850724] ? security_mmap_addr+0x7d/0xa0 [ 67.851317] ? get_unmapped_area+0x1f5/0x3f0 [ 67.851933] do_mmap+0x854/0xf00 [ 67.852422] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.852990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.853618] ksys_mmap_pgoff+0x3af/0x500 [ 67.854183] do_syscall_64+0x3f/0x90 [ 67.854716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.855442] RIP: 0033:0x7fdcf9786d82 [ 67.855954] 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 [ 67.858324] RSP: 002b:00007ffc6fb43f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.859334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcf9786d82 [ 67.860269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcf8bc0000 [ 67.861198] RBP: 00007fdcf8bc0000 R08: 0000000000000009 R09: 0000000000001000 [ 67.862127] R10: 0000000000000812 R11: 0000000000000206 R12: 000056085c842d90 [ 67.863055] R13: 00007ffc6fb43fa0 R14: 00007ffc6fb43fd0 R15: 00007ffc6fb44330 [ 67.864000] [ 67.864323] [ 67.864575] Allocated by task 212: [ 67.865048] kasan_save_stack+0x22/0x50 [ 67.865605] kasan_set_track+0x25/0x30 [ 67.866147] __kasan_slab_alloc+0x59/0x70 [ 67.866726] kmem_cache_alloc+0x16b/0x370 [ 67.867287] vm_area_dup+0x20/0x160 [ 67.867788] __split_vma+0x170/0x950 [ 67.868301] split_vma+0xc6/0x110 [ 67.868788] mprotect_fixup+0x8d2/0xb30 [ 67.869341] do_mprotect_pkey+0x87e/0xd40 [ 67.869915] __x64_sys_mprotect+0x78/0xc0 [ 67.870488] do_syscall_64+0x3f/0x90 [ 67.871010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.871719] [ 67.871957] Freed by task 212: [ 67.872380] kasan_save_stack+0x22/0x50 [ 67.872959] kasan_set_track+0x25/0x30 [ 67.873503] kasan_save_free_info+0x2b/0x50 [ 67.874095] __kasan_slab_free+0x10a/0x190 [ 67.874685] kmem_cache_free+0x10d/0x4d0 [ 67.875245] rcu_core+0x8c8/0x2860 [ 67.875736] __do_softirq+0x1b7/0x7d4 [ 67.876264] [ 67.876508] Last potentially related work creation: [ 67.877155] kasan_save_stack+0x22/0x50 [ 67.877710] __kasan_record_aux_stack+0x8e/0xa0 [ 67.878342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.879049] remove_vma+0x139/0x170 [ 67.879542] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.880153] do_vmi_munmap+0x1f1/0x2b0 [ 67.880697] __vm_munmap+0x138/0x3a0 [ 67.881205] __x64_sys_munmap+0x59/0x80 [ 67.881746] do_syscall_64+0x3f/0x90 [ 67.882265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.882964] [ 67.883197] The buggy address belongs to the object at ffff888019ec1ae0 [ 67.883197] which belongs to the cache vm_area_struct of size 168 [ 67.884815] The buggy address is located 88 bytes inside of [ 67.884815] freed 168-byte region [ffff888019ec1ae0, ffff888019ec1b88) [ 67.886351] [ 67.886586] The buggy address belongs to the physical page: [ 67.887307] page:000000001e1f9d9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ec1 [ 67.888498] memcg:ffff88800ca75301 [ 67.888966] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.889669] page_type: 0xffffffff() [ 67.890161] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.891179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca75301 [ 67.892170] page dumped because: kasan: bad access detected [ 67.892904] [ 67.893139] Memory state around the buggy address: [ 67.893769] ffff888019ec1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.894709] ffff888019ec1a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 67.895648] >ffff888019ec1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.896583] ^ [ 67.897253] ffff888019ec1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 67.898181] ffff888019ec1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 67.899097] ================================================================== [ 67.900203] Disabling lock debugging due to kernel taint [ 69.810904] BUG: Bad rss-counter state mm:00000000aaffcd05 type:MM_FILEPAGES val:33 [ 69.811956] BUG: Bad rss-counter state mm:00000000aaffcd05 type:MM_ANONPAGES val:22 [ 70.289692] BUG: Bad rss-counter state mm:000000002c684ac5 type:MM_FILEPAGES val:33 [ 70.290854] BUG: Bad rss-counter state mm:000000002c684ac5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31378' (ECDSA) to the list of known hosts. 2023/06/19 16:04:26 fuzzer started 2023/06/19 16:04:27 dialing manager at localhost:44161 2023/06/19 16:04:27 checking machine... 2023/06/19 16:04:27 checking revisions... [ 71.009677] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:04:27 testing simple program... [ 71.055101] cgroup: Unknown subsys name 'net' [ 71.109381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:49 Registers: info registers vcpu 0 RAX=0000000000000021 RBX=0000000000000020 RCX=00005606b6dd2010 RDX=0000000000000000 RSI=00005606b6e172b0 RDI=00007fd8e7c91b80 RBP=00007fd8e7c91b80 RSP=00007ffcb152c670 R8 =00005606b6e01a10 R9 =00007ffcb1525ac8 R10=00005606b6e172c0 R11=0000000000000246 R12=00005606b6e172b0 R13=0000000000000000 R14=000000000000000b R15=0000000000000000 RIP=00007fd8e7b59993 RFL=00000257 [---ZAPC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd8e76df900 00000000 00000000 GS =0000 0000000000000000 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=00007ffcb1526000 CR3=0000000015e18000 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=6720646572637465733a4d41503d706f 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=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=00007f753f7df008 CR3=000000000e320000 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=2036323a34303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000