syzkaller login: [ 65.976898] BUG: Bad rss-counter state mm:0000000020b79cdd type:MM_FILEPAGES val:33 [ 65.978125] BUG: Bad rss-counter state mm:0000000020b79cdd type:MM_ANONPAGES val:22 [ 66.016211] ================================================================== [ 66.017362] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.018460] Read of size 8 at addr ffff88800d844df0 by task sshd/219 [ 66.019406] [ 66.019730] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.020666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.021773] Call Trace: [ 66.022198] [ 66.022492] dump_stack_lvl+0x91/0xf0 [ 66.023069] print_report+0xcc/0x620 [ 66.023654] ? __virt_addr_valid+0x102/0x340 [ 66.024323] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.025042] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.025654] kasan_report+0xbe/0xf0 [ 66.026146] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.026914] vma_interval_tree_remove+0xc75/0xec0 [ 66.027516] vma_prepare+0xc54/0x11a0 [ 66.028003] __split_vma+0x5af/0x950 [ 66.028479] ? __pfx___split_vma+0x10/0x10 [ 66.029006] ? find_held_lock+0x2c/0x110 [ 66.029533] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.030099] ? lock_is_held_type+0x9f/0x120 [ 66.030636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.031252] ? mtree_range_walk+0x632/0x900 [ 66.031808] ? mas_walk+0x5c7/0x7c0 [ 66.032281] do_vmi_munmap+0x1f1/0x2b0 [ 66.032773] mmap_region+0x1f9/0x2660 [ 66.033257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.033767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.034500] ? __pfx_lock_acquire+0x10/0x10 [ 66.035037] ? __pfx_mmap_region+0x10/0x10 [ 66.035568] ? security_mmap_addr+0x7d/0xa0 [ 66.036094] ? get_unmapped_area+0x1f5/0x3f0 [ 66.036647] do_mmap+0x854/0xf00 [ 66.037079] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.037571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.038136] ksys_mmap_pgoff+0x3af/0x500 [ 66.038645] do_syscall_64+0x3f/0x90 [ 66.039120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.039767] RIP: 0033:0x7fa988607d82 [ 66.040224] 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 [ 66.042351] RSP: 002b:00007ffe3b2c84c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.043256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa988607d82 [ 66.044104] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa987a41000 [ 66.044950] RBP: 00007fa987a41000 R08: 0000000000000009 R09: 0000000000001000 [ 66.045799] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc36555d90 [ 66.046655] R13: 00007ffe3b2c84e0 R14: 00007ffe3b2c8510 R15: 00007ffe3b2c8870 [ 66.047505] [ 66.047795] [ 66.048012] Allocated by task 212: [ 66.048436] kasan_save_stack+0x22/0x50 [ 66.048938] kasan_set_track+0x25/0x30 [ 66.049437] __kasan_slab_alloc+0x59/0x70 [ 66.049970] kmem_cache_alloc+0x16b/0x370 [ 66.050479] vm_area_dup+0x20/0x160 [ 66.050928] __split_vma+0x170/0x950 [ 66.051391] split_vma+0xc6/0x110 [ 66.051830] mprotect_fixup+0x8d2/0xb30 [ 66.052334] do_mprotect_pkey+0x87e/0xd40 [ 66.052848] __x64_sys_mprotect+0x78/0xc0 [ 66.053366] do_syscall_64+0x3f/0x90 [ 66.053837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.054495] [ 66.054709] Freed by task 212: [ 66.055097] kasan_save_stack+0x22/0x50 [ 66.055609] kasan_set_track+0x25/0x30 [ 66.056109] kasan_save_free_info+0x2b/0x50 [ 66.056647] __kasan_slab_free+0x10a/0x190 [ 66.057180] kmem_cache_free+0x10d/0x4d0 [ 66.057690] rcu_core+0x8c8/0x2860 [ 66.058137] __do_softirq+0x1b7/0x7d4 [ 66.058608] [ 66.058823] Last potentially related work creation: [ 66.059402] kasan_save_stack+0x22/0x50 [ 66.059897] __kasan_record_aux_stack+0x8e/0xa0 [ 66.060476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.061210] remove_vma+0x139/0x170 [ 66.061668] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.062235] do_vmi_munmap+0x1f1/0x2b0 [ 66.062721] __vm_munmap+0x138/0x3a0 [ 66.063187] __x64_sys_munmap+0x59/0x80 [ 66.063690] do_syscall_64+0x3f/0x90 [ 66.064169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.064803] [ 66.065015] Second to last potentially related work creation: [ 66.065696] kasan_save_stack+0x22/0x50 [ 66.066222] __kasan_record_aux_stack+0x8e/0xa0 [ 66.066820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.067477] remove_vma+0x139/0x170 [ 66.067944] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.068519] do_vmi_munmap+0x1f1/0x2b0 [ 66.069022] __vm_munmap+0x138/0x3a0 [ 66.069505] elf_map+0x26f/0x310 [ 66.069976] load_elf_binary+0xd82/0x5030 [ 66.070519] bprm_execve+0x803/0x1940 [ 66.070994] do_execveat_common+0x734/0x8e0 [ 66.071544] __x64_sys_execve+0x93/0xc0 [ 66.072051] do_syscall_64+0x3f/0x90 [ 66.072540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.073205] [ 66.073426] The buggy address belongs to the object at ffff88800d844d98 [ 66.073426] which belongs to the cache vm_area_struct of size 168 [ 66.074964] The buggy address is located 88 bytes inside of [ 66.074964] freed 168-byte region [ffff88800d844d98, ffff88800d844e40) [ 66.076425] [ 66.076645] The buggy address belongs to the physical page: [ 66.077325] page:000000003291f775 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd844 [ 66.078472] memcg:ffff88800e5aba01 [ 66.078921] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 66.079644] page_type: 0xffffffff() [ 66.080112] raw: 0100000000000200 ffff88800879fc80 ffffea0000362400 dead000000000005 [ 66.081060] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5aba01 [ 66.082015] page dumped because: kasan: bad access detected [ 66.082701] [ 66.082923] Memory state around the buggy address: [ 66.083522] ffff88800d844c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 66.084411] ffff88800d844d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 66.085304] >ffff88800d844d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 66.086196] ^ [ 66.087037] ffff88800d844e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 66.087915] ffff88800d844e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.088804] ================================================================== [ 66.089772] Disabling lock debugging due to kernel taint [ 68.146101] BUG: Bad rss-counter state mm:00000000217bcda2 type:MM_FILEPAGES val:33 [ 68.147672] BUG: Bad rss-counter state mm:00000000217bcda2 type:MM_ANONPAGES val:22 [ 68.654832] BUG: Bad rss-counter state mm:000000001dbe6e24 type:MM_FILEPAGES val:33 [ 68.655997] BUG: Bad rss-counter state mm:000000001dbe6e24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24534' (ECDSA) to the list of known hosts. 2023/06/20 04:14:09 fuzzer started 2023/06/20 04:14:09 dialing manager at localhost:44161 2023/06/20 04:14:09 checking machine... 2023/06/20 04:14:09 checking revisions... [ 69.348111] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:14:10 testing simple program... [ 69.409932] cgroup: Unknown subsys name 'net' [ 69.498950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:42 Registers: info registers vcpu 0 RAX=0000000002edaa8f RBX=00000000a6b61ba1 RCX=000000006b61ba1a RDX=0000000000000009 RSI=0000000000000003 RDI=000000008418e750 RBP=0000000000000000 RSP=ffff888016ae7a80 R8 =00000000cbc73dda R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888016ae7ae8 R15=0000000000000009 RIP=ffffffff82270f9e RFL=00000202 [-------] 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 00007f302e524900 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=00007ffc91060000 CR3=0000000017cb6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf944 RBX=ffffffff85dfca20 RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff88806cf099e0 R8 =ffffffff86137508 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca20 R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 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=00007fc064bb1a80 CR3=000000000d7a8000 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=33874e5eccb09d9bc944bb908cf8db36 XMM02=ec2efd57dc4c00df000000000011c538 XMM03=be07cc13689992eb000000000011c608 XMM04=691606b74851dcf000000000000ae988 XMM05=dfcdbad4f1609c370000000000134230 XMM06=806171799158d96700000000001340b8 XMM07=e042d86d42eb936e0000000000123480 XMM08=be07cc13689992eb000000000011c608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000