syzkaller login: [ 35.348029] BUG: Bad rss-counter state mm:000000000317b289 type:MM_FILEPAGES val:33 [ 35.349411] BUG: Bad rss-counter state mm:000000000317b289 type:MM_ANONPAGES val:22 [ 35.478708] ================================================================== [ 35.479383] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.480029] Read of size 8 at addr ffff88800d9cea50 by task sshd/220 [ 35.480545] [ 35.480692] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.481299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.481934] Call Trace: [ 35.482146] [ 35.482331] dump_stack_lvl+0x91/0xf0 [ 35.482643] print_report+0xcc/0x620 [ 35.483229] ? __virt_addr_valid+0x102/0x340 [ 35.483627] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.484059] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.484481] kasan_report+0xbe/0xf0 [ 35.484814] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.485356] vma_interval_tree_remove+0xc75/0xec0 [ 35.485813] vma_prepare+0xc54/0x11a0 [ 35.486162] __split_vma+0x5af/0x950 [ 35.486509] ? __pfx___split_vma+0x10/0x10 [ 35.486895] ? find_held_lock+0x2c/0x110 [ 35.487249] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.487643] ? lock_is_held_type+0x9f/0x120 [ 35.488031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.488428] ? mtree_range_walk+0x632/0x900 [ 35.488794] ? mas_walk+0x5c7/0x7c0 [ 35.489119] do_vmi_munmap+0x1f1/0x2b0 [ 35.489491] mmap_region+0x1f9/0x2660 [ 35.489841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.490190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.490669] ? __pfx_lock_acquire+0x10/0x10 [ 35.491007] ? __pfx_mmap_region+0x10/0x10 [ 35.491352] ? security_mmap_addr+0x7d/0xa0 [ 35.491700] ? get_unmapped_area+0x1f5/0x3f0 [ 35.492046] do_mmap+0x854/0xf00 [ 35.492336] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.492673] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.493052] ksys_mmap_pgoff+0x3af/0x500 [ 35.493458] do_syscall_64+0x3f/0x90 [ 35.493787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.494227] RIP: 0033:0x7fe9e73aed82 [ 35.494542] 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 [ 35.496056] RSP: 002b:00007ffd355fce18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.496694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9e73aed82 [ 35.497326] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9e67e8000 [ 35.497980] RBP: 00007fe9e67e8000 R08: 0000000000000009 R09: 0000000000001000 [ 35.498611] R10: 0000000000000812 R11: 0000000000000206 R12: 000055628e0c0d90 [ 35.499184] R13: 00007ffd355fce30 R14: 00007ffd355fce60 R15: 00007ffd355fd1c0 [ 35.499774] [ 35.499974] [ 35.500117] Allocated by task 212: [ 35.500409] kasan_save_stack+0x22/0x50 [ 35.500771] kasan_set_track+0x25/0x30 [ 35.501083] __kasan_slab_alloc+0x59/0x70 [ 35.501588] kmem_cache_alloc+0x16b/0x370 [ 35.501992] vm_area_dup+0x20/0x160 [ 35.502316] __split_vma+0x170/0x950 [ 35.502635] split_vma+0xc6/0x110 [ 35.502939] mprotect_fixup+0x8d2/0xb30 [ 35.503297] do_mprotect_pkey+0x87e/0xd40 [ 35.503659] __x64_sys_mprotect+0x78/0xc0 [ 35.504019] do_syscall_64+0x3f/0x90 [ 35.504357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.504794] [ 35.504935] Freed by task 203: [ 35.505240] kasan_save_stack+0x22/0x50 [ 35.505583] kasan_set_track+0x25/0x30 [ 35.505926] kasan_save_free_info+0x2b/0x50 [ 35.506286] __kasan_slab_free+0x10a/0x190 [ 35.506650] kmem_cache_free+0x10d/0x4d0 [ 35.506997] rcu_core+0x8c8/0x2860 [ 35.507295] __do_softirq+0x1b7/0x7d4 [ 35.507637] [ 35.507786] Last potentially related work creation: [ 35.508186] kasan_save_stack+0x22/0x50 [ 35.508527] __kasan_record_aux_stack+0x8e/0xa0 [ 35.508953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.509452] remove_vma+0x139/0x170 [ 35.509752] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.510145] do_vmi_munmap+0x1f1/0x2b0 [ 35.510465] __vm_munmap+0x138/0x3a0 [ 35.510773] __x64_sys_munmap+0x59/0x80 [ 35.511115] do_syscall_64+0x3f/0x90 [ 35.511450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.511899] [ 35.512044] Second to last potentially related work creation: [ 35.512497] kasan_save_stack+0x22/0x50 [ 35.512845] __kasan_record_aux_stack+0x8e/0xa0 [ 35.513285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.513718] remove_vma+0x139/0x170 [ 35.514040] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.514399] do_vmi_munmap+0x1f1/0x2b0 [ 35.514702] __vm_munmap+0x138/0x3a0 [ 35.514992] __x64_sys_munmap+0x59/0x80 [ 35.515312] do_syscall_64+0x3f/0x90 [ 35.515639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.516071] [ 35.516215] The buggy address belongs to the object at ffff88800d9ce9f8 [ 35.516215] which belongs to the cache vm_area_struct of size 168 [ 35.517272] The buggy address is located 88 bytes inside of [ 35.517272] freed 168-byte region [ffff88800d9ce9f8, ffff88800d9ceaa0) [ 35.518229] [ 35.518384] The buggy address belongs to the physical page: [ 35.518888] page:0000000091016930 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9ce [ 35.519640] memcg:ffff88800e9dc401 [ 35.519934] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.520394] page_type: 0xffffffff() [ 35.520706] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b940 dead000000000006 [ 35.521368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9dc401 [ 35.521998] page dumped because: kasan: bad access detected [ 35.522445] [ 35.522588] Memory state around the buggy address: [ 35.522995] ffff88800d9ce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.523598] ffff88800d9ce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.524241] >ffff88800d9cea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.524820] ^ [ 35.525339] ffff88800d9cea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.525922] ffff88800d9ceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.526459] ================================================================== [ 35.527180] Disabling lock debugging due to kernel taint [ 37.491610] BUG: Bad rss-counter state mm:00000000ffbddbd6 type:MM_FILEPAGES val:33 [ 37.492392] BUG: Bad rss-counter state mm:00000000ffbddbd6 type:MM_ANONPAGES val:22 [ 37.874899] BUG: Bad rss-counter state mm:000000000056fc40 type:MM_FILEPAGES val:33 [ 37.876834] BUG: Bad rss-counter state mm:000000000056fc40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18652' (ECDSA) to the list of known hosts. 2023/06/21 08:29:22 fuzzer started 2023/06/21 08:29:22 dialing manager at localhost:36067 2023/06/21 08:29:22 checking machine... 2023/06/21 08:29:22 checking revisions... [ 38.407226] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:29:22 testing simple program... [ 38.440056] cgroup: Unknown subsys name 'net' [ 38.470759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:29:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000034 RCX=ffffffff813782c0 RDX=1ffff11000d16394 RSI=0000000000000000 RDI=ffff8880068b1ca0 RBP=0000000000000035 RSP=ffff88806ce09e18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff8880068b1c60 R14=ffff8880068b1be0 R15=dffffc0000000000 RIP=ffffffff81845e46 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 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=00007f14b35f5fc0 CR3=000000000e07e000 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=2031323a39323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a39323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888017ec5a00 RCX=0000000000000000 RDX=0000000000000100 RSI=0000000000000000 RDI=ffff88800f897cc0 RBP=0000000000000007 RSP=ffff88801474f138 R8 =0000000000000005 R9 =0000000000000000 R10=ffff88800f897c00 R11=ffff8003e38a6000 R12=ffff88801474fe70 R13=0000000000000000 R14=ffff88800f897c00 R15=ffff88801474f568 RIP=ffffffff84513403 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 00007f570daec900 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=00007f570dacb020 CR3=00000000169c6000 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=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