syzkaller login: [ 30.601756] BUG: Bad rss-counter state mm:00000000041398de type:MM_FILEPAGES val:33 [ 30.603496] BUG: Bad rss-counter state mm:00000000041398de type:MM_ANONPAGES val:22 [ 30.768205] ================================================================== [ 30.769132] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770074] Read of size 8 at addr ffff88801a02f5c8 by task sshd/219 [ 30.770932] [ 30.771164] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.772044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.773065] Call Trace: [ 30.773408] [ 30.773699] dump_stack_lvl+0x91/0xf0 [ 30.774204] print_report+0xcc/0x620 [ 30.774693] ? __virt_addr_valid+0x102/0x340 [ 30.775267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776532] kasan_report+0xbe/0xf0 [ 30.777025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777655] vma_interval_tree_remove+0xc75/0xec0 [ 30.778266] vma_prepare+0xc54/0x11a0 [ 30.778759] __split_vma+0x5af/0x950 [ 30.779255] ? __pfx___split_vma+0x10/0x10 [ 30.779802] ? find_held_lock+0x2c/0x110 [ 30.780338] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.780914] ? lock_is_held_type+0x9f/0x120 [ 30.781472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.782086] ? mtree_range_walk+0x632/0x900 [ 30.782646] ? mas_walk+0x5c7/0x7c0 [ 30.783150] do_vmi_munmap+0x1f1/0x2b0 [ 30.783655] mmap_region+0x1f9/0x2660 [ 30.784144] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.784663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.785399] ? __pfx_lock_acquire+0x10/0x10 [ 30.785936] ? __pfx_mmap_region+0x10/0x10 [ 30.786475] ? security_mmap_addr+0x7d/0xa0 [ 30.787030] ? get_unmapped_area+0x1f5/0x3f0 [ 30.787589] do_mmap+0x854/0xf00 [ 30.788035] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.788534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.789107] ksys_mmap_pgoff+0x3af/0x500 [ 30.789626] do_syscall_64+0x3f/0x90 [ 30.790120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790772] RIP: 0033:0x7feef27efd82 [ 30.791242] 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 [ 30.793401] RSP: 002b:00007ffe3dc6b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.794327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feef27efd82 [ 30.795222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feef1c29000 [ 30.796091] RBP: 00007feef1c29000 R08: 0000000000000009 R09: 0000000000001000 [ 30.796965] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a3500aec0 [ 30.797829] R13: 00007ffe3dc6b860 R14: 00007ffe3dc6b890 R15: 00007ffe3dc6bbf0 [ 30.798706] [ 30.799022] [ 30.799240] Allocated by task 212: [ 30.799677] kasan_save_stack+0x22/0x50 [ 30.800185] kasan_set_track+0x25/0x30 [ 30.800688] __kasan_slab_alloc+0x59/0x70 [ 30.801243] kmem_cache_alloc+0x16b/0x370 [ 30.801788] vm_area_dup+0x20/0x160 [ 30.802273] __split_vma+0x170/0x950 [ 30.802763] split_vma+0xc6/0x110 [ 30.803242] mprotect_fixup+0x8d2/0xb30 [ 30.803783] do_mprotect_pkey+0x87e/0xd40 [ 30.804334] __x64_sys_mprotect+0x78/0xc0 [ 30.804893] do_syscall_64+0x3f/0x90 [ 30.805392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.806076] [ 30.806303] Freed by task 212: [ 30.806709] kasan_save_stack+0x22/0x50 [ 30.807260] kasan_set_track+0x25/0x30 [ 30.807781] kasan_save_free_info+0x2b/0x50 [ 30.808347] __kasan_slab_free+0x10a/0x190 [ 30.808918] kmem_cache_free+0x10d/0x4d0 [ 30.809461] rcu_core+0x8c8/0x2860 [ 30.809939] __do_softirq+0x1b7/0x7d4 [ 30.810448] [ 30.810677] Last potentially related work creation: [ 30.811307] kasan_save_stack+0x22/0x50 [ 30.811832] __kasan_record_aux_stack+0x8e/0xa0 [ 30.812435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.813109] remove_vma+0x139/0x170 [ 30.813588] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.814168] do_vmi_munmap+0x1f1/0x2b0 [ 30.814692] __vm_munmap+0x138/0x3a0 [ 30.815183] __x64_sys_munmap+0x59/0x80 [ 30.815688] do_syscall_64+0x3f/0x90 [ 30.816182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816837] [ 30.817052] The buggy address belongs to the object at ffff88801a02f570 [ 30.817052] which belongs to the cache vm_area_struct of size 168 [ 30.818547] The buggy address is located 88 bytes inside of [ 30.818547] freed 168-byte region [ffff88801a02f570, ffff88801a02f618) [ 30.819985] [ 30.820202] The buggy address belongs to the physical page: [ 30.820870] page:00000000b196ef2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a02f [ 30.821972] memcg:ffff888016c30201 [ 30.822406] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.823068] page_type: 0xffffffff() [ 30.823525] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.824448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c30201 [ 30.825372] page dumped because: kasan: bad access detected [ 30.826044] [ 30.826263] Memory state around the buggy address: [ 30.826868] ffff88801a02f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.827724] ffff88801a02f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.828595] >ffff88801a02f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.829460] ^ [ 30.830150] ffff88801a02f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.831056] ffff88801a02f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.831924] ================================================================== [ 30.832948] Disabling lock debugging due to kernel taint [ 33.612898] BUG: Bad rss-counter state mm:0000000064487661 type:MM_FILEPAGES val:33 [ 33.613841] BUG: Bad rss-counter state mm:0000000064487661 type:MM_ANONPAGES val:22 [ 34.167691] BUG: Bad rss-counter state mm:0000000065ece361 type:MM_FILEPAGES val:33 [ 34.168868] BUG: Bad rss-counter state mm:0000000065ece361 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29721' (ECDSA) to the list of known hosts. 2023/06/20 14:27:40 fuzzer started 2023/06/20 14:27:41 dialing manager at localhost:36067 2023/06/20 14:27:41 checking machine... 2023/06/20 14:27:41 checking revisions... [ 34.809183] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:27:41 testing simple program... [ 34.864759] cgroup: Unknown subsys name 'net' [ 34.915883] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:27:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f4dd07770f8 CR3=000000000ca80000 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=2030343a37323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff818d9c05 RDX=0000000000008d9c RSI=0000000000008d9c RDI=ffffffff8650d060 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8113077a 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 00007ff9cddd4900 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=00007ffe74c63000 CR3=000000000dcda000 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=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