syzkaller login: [ 23.903912] BUG: Bad rss-counter state mm:0000000071adbe4c type:MM_FILEPAGES val:33 [ 23.905064] BUG: Bad rss-counter state mm:0000000071adbe4c type:MM_ANONPAGES val:22 [ 24.073216] ================================================================== [ 24.074107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.075047] Read of size 8 at addr ffff888018103d08 by task sshd/220 [ 24.075816] [ 24.076037] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.076986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.077955] Call Trace: [ 24.078276] [ 24.078581] dump_stack_lvl+0x91/0xf0 [ 24.079072] print_report+0xcc/0x620 [ 24.079570] ? __virt_addr_valid+0x102/0x340 [ 24.080120] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.080735] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.081354] kasan_report+0xbe/0xf0 [ 24.081824] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.082438] vma_interval_tree_remove+0xc75/0xec0 [ 24.083040] vma_prepare+0xc54/0x11a0 [ 24.083558] __split_vma+0x5af/0x950 [ 24.084049] ? __pfx___split_vma+0x10/0x10 [ 24.084599] ? find_held_lock+0x2c/0x110 [ 24.085137] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.085726] ? lock_is_held_type+0x9f/0x120 [ 24.086291] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.086914] ? mtree_range_walk+0x632/0x900 [ 24.087511] ? mas_walk+0x5c7/0x7c0 [ 24.088002] do_vmi_munmap+0x1f1/0x2b0 [ 24.088509] mmap_region+0x1f9/0x2660 [ 24.089006] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.089528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.090274] ? __pfx_lock_acquire+0x10/0x10 [ 24.090824] ? __pfx_mmap_region+0x10/0x10 [ 24.091378] ? security_mmap_addr+0x7d/0xa0 [ 24.091923] ? get_unmapped_area+0x1f5/0x3f0 [ 24.092489] do_mmap+0x854/0xf00 [ 24.092940] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.093454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.094036] ksys_mmap_pgoff+0x3af/0x500 [ 24.094564] do_syscall_64+0x3f/0x90 [ 24.095061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.095743] RIP: 0033:0x7fcb4c589d82 [ 24.096217] 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 [ 24.098418] RSP: 002b:00007ffd51d7eb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.099377] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb4c589d82 [ 24.100245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb4b9c3000 [ 24.101111] RBP: 00007fcb4b9c3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.101987] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c632c89ec0 [ 24.102867] R13: 00007ffd51d7eb30 R14: 00007ffd51d7eb60 R15: 00007ffd51d7eec0 [ 24.103757] [ 24.104061] [ 24.104285] Allocated by task 213: [ 24.104727] kasan_save_stack+0x22/0x50 [ 24.105246] kasan_set_track+0x25/0x30 [ 24.105759] __kasan_slab_alloc+0x59/0x70 [ 24.106309] kmem_cache_alloc+0x16b/0x370 [ 24.106835] vm_area_dup+0x20/0x160 [ 24.107309] __split_vma+0x170/0x950 [ 24.107802] split_vma+0xc6/0x110 [ 24.108253] mprotect_fixup+0x8d2/0xb30 [ 24.108770] do_mprotect_pkey+0x87e/0xd40 [ 24.109308] __x64_sys_mprotect+0x78/0xc0 [ 24.109843] do_syscall_64+0x3f/0x90 [ 24.110336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.111002] [ 24.111221] Freed by task 204: [ 24.111638] kasan_save_stack+0x22/0x50 [ 24.112157] kasan_set_track+0x25/0x30 [ 24.112664] kasan_save_free_info+0x2b/0x50 [ 24.113213] __kasan_slab_free+0x10a/0x190 [ 24.113766] kmem_cache_free+0x10d/0x4d0 [ 24.114300] rcu_core+0x8c8/0x2860 [ 24.114756] __do_softirq+0x1b7/0x7d4 [ 24.115250] [ 24.115502] Last potentially related work creation: [ 24.116101] kasan_save_stack+0x22/0x50 [ 24.116613] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.117869] remove_vma+0x139/0x170 [ 24.118333] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.118910] do_vmi_munmap+0x1f1/0x2b0 [ 24.119433] __vm_munmap+0x138/0x3a0 [ 24.119914] __x64_sys_munmap+0x59/0x80 [ 24.120421] do_syscall_64+0x3f/0x90 [ 24.120910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.121577] [ 24.121797] The buggy address belongs to the object at ffff888018103cb0 [ 24.121797] which belongs to the cache vm_area_struct of size 168 [ 24.123319] The buggy address is located 88 bytes inside of [ 24.123319] freed 168-byte region [ffff888018103cb0, ffff888018103d58) [ 24.124778] [ 24.125001] The buggy address belongs to the physical page: [ 24.125693] page:00000000cbaacf13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18103 [ 24.126817] memcg:ffff888019393701 [ 24.127258] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.127929] page_type: 0xffffffff() [ 24.128396] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.129356] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019393701 [ 24.130305] page dumped because: kasan: bad access detected [ 24.130983] [ 24.131206] Memory state around the buggy address: [ 24.131821] ffff888018103c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.132716] ffff888018103c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.133594] >ffff888018103d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.134484] ^ [ 24.134944] ffff888018103d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.135841] ffff888018103e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.136721] ================================================================== [ 24.137724] Disabling lock debugging due to kernel taint [ 26.324398] BUG: Bad rss-counter state mm:000000003c92d69f type:MM_FILEPAGES val:33 [ 26.325362] BUG: Bad rss-counter state mm:000000003c92d69f type:MM_ANONPAGES val:22 [ 26.874546] BUG: Bad rss-counter state mm:000000001952ff7e type:MM_FILEPAGES val:33 [ 26.875769] BUG: Bad rss-counter state mm:000000001952ff7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23319' (ECDSA) to the list of known hosts. 2023/06/20 13:02:36 fuzzer started 2023/06/20 13:02:36 dialing manager at localhost:36067 2023/06/20 13:02:36 checking machine... 2023/06/20 13:02:36 checking revisions... [ 27.518890] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:02:36 testing simple program... [ 27.572909] cgroup: Unknown subsys name 'net' [ 27.633134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:02:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86148ed0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801581f7f8 RSP=ffff88801581f730 R8 =ffffffff86148ed4 R9 =ffff88801581f7e0 R10=0000000000038001 R11=000000000002384c R12=ffff88801581f800 R13=ffff88801581f7e8 R14=ffff88801581f7e1 R15=ffff88801581f7a0 RIP=ffffffff81130ad6 RFL=00000246 [---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 00007fc0e8ede900 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=00007f470d0f0650 CR3=0000000013658000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=70092ce1daa89b9200000000000ae988 XMM05=f689438e08be7f8800000000001328f0 XMM06=19e9129bd510f2350000000000131418 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007fff790aedf8 CR3=000000000eeca000 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=2036333a32303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a32303a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000