syzkaller login: [ 31.282694] BUG: Bad rss-counter state mm:00000000cc8924aa type:MM_FILEPAGES val:33 [ 31.283868] BUG: Bad rss-counter state mm:00000000cc8924aa type:MM_ANONPAGES val:22 [ 31.322810] ================================================================== [ 31.323727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.324845] Read of size 8 at addr ffff88800e0d4b38 by task sshd/219 [ 31.325648] [ 31.325869] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.326784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.327783] Call Trace: [ 31.328109] [ 31.328405] dump_stack_lvl+0x91/0xf0 [ 31.328913] print_report+0xcc/0x620 [ 31.329412] ? __virt_addr_valid+0x102/0x340 [ 31.330000] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330644] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331280] kasan_report+0xbe/0xf0 [ 31.331784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.332427] vma_interval_tree_remove+0xc75/0xec0 [ 31.333045] vma_prepare+0xc54/0x11a0 [ 31.333556] __split_vma+0x5af/0x950 [ 31.334041] ? __pfx___split_vma+0x10/0x10 [ 31.334727] ? find_held_lock+0x2c/0x110 [ 31.335259] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.335846] ? lock_is_held_type+0x9f/0x120 [ 31.336400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.337020] ? mtree_range_walk+0x632/0x900 [ 31.337611] ? mas_walk+0x5c7/0x7c0 [ 31.338123] do_vmi_munmap+0x1f1/0x2b0 [ 31.338637] mmap_region+0x1f9/0x2660 [ 31.339122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.339652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.340371] ? __pfx_lock_acquire+0x10/0x10 [ 31.340951] ? __pfx_mmap_region+0x10/0x10 [ 31.341514] ? security_mmap_addr+0x7d/0xa0 [ 31.342097] ? get_unmapped_area+0x1f5/0x3f0 [ 31.342682] do_mmap+0x854/0xf00 [ 31.343139] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.343670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.344242] ksys_mmap_pgoff+0x3af/0x500 [ 31.344770] do_syscall_64+0x3f/0x90 [ 31.345248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.345949] RIP: 0033:0x7f866cb15d82 [ 31.346430] 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 [ 31.348577] RSP: 002b:00007ffcf059ad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.349525] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f866cb15d82 [ 31.350402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f866bf4f000 [ 31.351250] RBP: 00007f866bf4f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.352103] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591f631fec0 [ 31.352969] R13: 00007ffcf059ad80 R14: 00007ffcf059adb0 R15: 00007ffcf059b110 [ 31.353849] [ 31.354158] [ 31.354382] Allocated by task 212: [ 31.354841] kasan_save_stack+0x22/0x50 [ 31.355351] kasan_set_track+0x25/0x30 [ 31.355865] __kasan_slab_alloc+0x59/0x70 [ 31.356403] kmem_cache_alloc+0x16b/0x370 [ 31.356932] vm_area_dup+0x20/0x160 [ 31.357392] __split_vma+0x170/0x950 [ 31.357889] split_vma+0xc6/0x110 [ 31.358357] mprotect_fixup+0x8d2/0xb30 [ 31.358885] do_mprotect_pkey+0x87e/0xd40 [ 31.359434] __x64_sys_mprotect+0x78/0xc0 [ 31.359968] do_syscall_64+0x3f/0x90 [ 31.360463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361119] [ 31.361336] Freed by task 212: [ 31.361754] kasan_save_stack+0x22/0x50 [ 31.362275] kasan_set_track+0x25/0x30 [ 31.362788] kasan_save_free_info+0x2b/0x50 [ 31.363327] __kasan_slab_free+0x10a/0x190 [ 31.363875] kmem_cache_free+0x10d/0x4d0 [ 31.364399] rcu_core+0x8c8/0x2860 [ 31.364858] __do_softirq+0x1b7/0x7d4 [ 31.365330] [ 31.365571] Last potentially related work creation: [ 31.366178] kasan_save_stack+0x22/0x50 [ 31.366705] __kasan_record_aux_stack+0x8e/0xa0 [ 31.367276] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.367942] remove_vma+0x139/0x170 [ 31.368410] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.368971] do_vmi_munmap+0x1f1/0x2b0 [ 31.369479] __vm_munmap+0x138/0x3a0 [ 31.369982] __x64_sys_munmap+0x59/0x80 [ 31.370511] do_syscall_64+0x3f/0x90 [ 31.370997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.371664] [ 31.371881] Second to last potentially related work creation: [ 31.372578] kasan_save_stack+0x22/0x50 [ 31.373084] __kasan_record_aux_stack+0x8e/0xa0 [ 31.373677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.374346] remove_vma+0x139/0x170 [ 31.374818] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.375384] do_vmi_munmap+0x1f1/0x2b0 [ 31.375907] mmap_region+0x1f9/0x2660 [ 31.376399] do_mmap+0x854/0xf00 [ 31.376840] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.377337] ksys_mmap_pgoff+0x3af/0x500 [ 31.377858] do_syscall_64+0x3f/0x90 [ 31.378361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.379023] [ 31.379238] The buggy address belongs to the object at ffff88800e0d4ae0 [ 31.379238] which belongs to the cache vm_area_struct of size 168 [ 31.380755] The buggy address is located 88 bytes inside of [ 31.380755] freed 168-byte region [ffff88800e0d4ae0, ffff88800e0d4b88) [ 31.382231] [ 31.382467] The buggy address belongs to the physical page: [ 31.383143] page:000000008ae4a106 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0d4 [ 31.384296] memcg:ffff88800e016f01 [ 31.384762] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.385436] page_type: 0xffffffff() [ 31.385896] raw: 0100000000000200 ffff8880087a0c80 ffffea000032a200 dead000000000004 [ 31.386848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e016f01 [ 31.387810] page dumped because: kasan: bad access detected [ 31.388528] [ 31.388742] Memory state around the buggy address: [ 31.389369] ffff88800e0d4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.390292] ffff88800e0d4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.391203] >ffff88800e0d4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.392105] ^ [ 31.392742] ffff88800e0d4b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.393663] ffff88800e0d4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.394536] ================================================================== [ 31.395650] Disabling lock debugging due to kernel taint [ 33.194578] BUG: Bad rss-counter state mm:00000000b25222ae type:MM_FILEPAGES val:33 [ 33.195742] BUG: Bad rss-counter state mm:00000000b25222ae type:MM_ANONPAGES val:22 [ 33.710511] BUG: Bad rss-counter state mm:00000000fae083cb type:MM_FILEPAGES val:33 [ 33.712104] BUG: Bad rss-counter state mm:00000000fae083cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64351' (ECDSA) to the list of known hosts. 2023/06/20 15:27:15 fuzzer started 2023/06/20 15:27:16 dialing manager at localhost:36067 2023/06/20 15:27:16 checking machine... 2023/06/20 15:27:16 checking revisions... [ 34.467501] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:27:16 testing simple program... [ 34.526508] cgroup: Unknown subsys name 'net' [ 34.588994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:27:15 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff8604ebe8 RCX=ffffffff8450cc7e RDX=0000000000000005 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff88801465f150 R8 =ffffffff864b2008 R9 =ffff88801465f248 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----A-C] 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 00007fc556958900 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=00007ffc24fb7000 CR3=000000000cb66000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9cd3bc39ad7277d500000000000ae988 XMM05=1319e678c5640f8a0000000000133e38 XMM06=e8008b1642ea3e600000000000133da0 XMM07=58f17c1affdc82d60000000000123160 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f467638 RCX=ffffffff81b2558c RDX=1ffff11003701691 RSI=0000000000000008 RDI=ffffea000073a500 RBP=ffffea000073a500 RSP=ffff88800f467208 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000009293 R12=ffff88801b80b438 R13=00000000000011d7 R14=0000000001b1f000 R15=ffffea000073a520 RIP=ffffffff8180fea8 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 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=00007f484e6d3000 CR3=000000000e856000 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=5468f5d4ec1e51103f75e03fe3f390f2 XMM02=981cb32402622287eb4d97fe57d3d739 XMM03=8dd87dadaf8e8c1169973e791e97e8ad XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000