Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.582145] BUG: Bad rss-counter state mm:000000008aa228bc type:MM_FILEPAGES val:33 [ 33.582838] BUG: Bad rss-counter state mm:000000008aa228bc type:MM_ANONPAGES val:22 [ 33.726892] ================================================================== [ 33.727525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.728167] Read of size 8 at addr ffff888014633df0 by task sshd/219 [ 33.728695] [ 33.728846] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.729440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.730129] Call Trace: [ 33.730461] [ 33.730667] dump_stack_lvl+0x91/0xf0 [ 33.730993] print_report+0xcc/0x620 [ 33.731322] ? __virt_addr_valid+0x102/0x340 [ 33.731695] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.732103] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.732509] kasan_report+0xbe/0xf0 [ 33.732828] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.733246] vma_interval_tree_remove+0xc75/0xec0 [ 33.733680] vma_prepare+0xc54/0x11a0 [ 33.734006] __split_vma+0x5af/0x950 [ 33.734330] ? __pfx___split_vma+0x10/0x10 [ 33.734687] ? find_held_lock+0x2c/0x110 [ 33.735039] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.735419] ? lock_is_held_type+0x9f/0x120 [ 33.735784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.736194] ? mtree_range_walk+0x632/0x900 [ 33.736569] ? mas_walk+0x5c7/0x7c0 [ 33.736898] do_vmi_munmap+0x1f1/0x2b0 [ 33.737235] mmap_region+0x1f9/0x2660 [ 33.737577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.737924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.738405] ? __pfx_lock_acquire+0x10/0x10 [ 33.738766] ? __pfx_mmap_region+0x10/0x10 [ 33.739129] ? security_mmap_addr+0x7d/0xa0 [ 33.739487] ? get_unmapped_area+0x1f5/0x3f0 [ 33.739858] do_mmap+0x854/0xf00 [ 33.740155] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.740491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.740866] ksys_mmap_pgoff+0x3af/0x500 [ 33.741206] do_syscall_64+0x3f/0x90 [ 33.741561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.741997] RIP: 0033:0x7fa71c59bd82 [ 33.742310] 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 [ 33.743729] RSP: 002b:00007ffe9149c648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.744343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa71c59bd82 [ 33.744908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa71b9d5000 [ 33.745476] RBP: 00007fa71b9d5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.746053] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639a17f0ec0 [ 33.746628] R13: 00007ffe9149c660 R14: 00007ffe9149c690 R15: 00007ffe9149c9f0 [ 33.747203] [ 33.747405] [ 33.747556] Allocated by task 212: [ 33.747850] kasan_save_stack+0x22/0x50 [ 33.748204] kasan_set_track+0x25/0x30 [ 33.748541] __kasan_slab_alloc+0x59/0x70 [ 33.748894] kmem_cache_alloc+0x16b/0x370 [ 33.749245] vm_area_dup+0x20/0x160 [ 33.749589] __split_vma+0x170/0x950 [ 33.749903] split_vma+0xc6/0x110 [ 33.750199] mprotect_fixup+0x8d2/0xb30 [ 33.750537] do_mprotect_pkey+0x87e/0xd40 [ 33.750891] __x64_sys_mprotect+0x78/0xc0 [ 33.751244] do_syscall_64+0x3f/0x90 [ 33.751566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.751994] [ 33.752138] Freed by task 103: [ 33.752403] kasan_save_stack+0x22/0x50 [ 33.752746] kasan_set_track+0x25/0x30 [ 33.753086] kasan_save_free_info+0x2b/0x50 [ 33.753452] __kasan_slab_free+0x10a/0x190 [ 33.753829] kmem_cache_free+0x10d/0x4d0 [ 33.754181] rcu_core+0x8c8/0x2860 [ 33.754487] __do_softirq+0x1b7/0x7d4 [ 33.754813] [ 33.754963] Last potentially related work creation: [ 33.755354] kasan_save_stack+0x22/0x50 [ 33.755697] __kasan_record_aux_stack+0x8e/0xa0 [ 33.756083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.756521] remove_vma+0x139/0x170 [ 33.756830] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.757207] do_vmi_munmap+0x1f1/0x2b0 [ 33.757571] __vm_munmap+0x138/0x3a0 [ 33.757890] __x64_sys_munmap+0x59/0x80 [ 33.758229] do_syscall_64+0x3f/0x90 [ 33.758549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.758982] [ 33.759132] The buggy address belongs to the object at ffff888014633d98 [ 33.759132] which belongs to the cache vm_area_struct of size 168 [ 33.760102] The buggy address is located 88 bytes inside of [ 33.760102] freed 168-byte region [ffff888014633d98, ffff888014633e40) [ 33.761032] [ 33.761182] The buggy address belongs to the physical page: [ 33.761637] page:00000000368b5da4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14633 [ 33.762381] memcg:ffff88800960c901 [ 33.762673] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.763108] page_type: 0xffffffff() [ 33.763419] raw: 0100000000000200 ffff88800879fc80 ffffea0000587700 dead000000000002 [ 33.764029] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800960c901 [ 33.764633] page dumped because: kasan: bad access detected [ 33.765074] [ 33.765226] Memory state around the buggy address: [ 33.765644] ffff888014633c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.766212] ffff888014633d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.766782] >ffff888014633d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.767351] ^ [ 33.767897] ffff888014633e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.768474] ffff888014633e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.769049] ================================================================== [ 33.769784] Disabling lock debugging due to kernel taint [ 35.620306] BUG: Bad rss-counter state mm:000000007e6baf82 type:MM_FILEPAGES val:33 [ 35.621098] BUG: Bad rss-counter state mm:000000007e6baf82 type:MM_ANONPAGES val:22 [ 35.993663] BUG: Bad rss-counter state mm:00000000625d7ff5 type:MM_FILEPAGES val:33 [ 35.994321] BUG: Bad rss-counter state mm:00000000625d7ff5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26044' (ECDSA) to the list of known hosts. 2023/06/20 00:11:46 fuzzer started 2023/06/20 00:11:46 dialing manager at localhost:44161 2023/06/20 00:11:46 checking machine... 2023/06/20 00:11:46 checking revisions... [ 36.558926] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:11:46 testing simple program... [ 36.605775] cgroup: Unknown subsys name 'net' [ 36.674341] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program [ 45.968868] kmemleak: 68 new suspected memory leaks (see /sys/kernel/debug/kmemleak) VM DIAGNOSIS: 00:11:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81f553e2 RDX=000000000000f554 RSI=000000000000f553 RDI=ffffffff86525110 RBP=ffff8880145974f8 RSP=ffff888014597430 R8 =0000000000000000 R9 =ffff8880145974e0 R10=0000000000038001 R11=000000000003aa07 R12=ffff888014597500 R13=ffff8880145974e8 R14=ffff8880145974e1 R15=ffff8880145974a0 RIP=ffffffff811307e3 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 00007f1c0831a900 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=00007f1c077ac2e0 CR3=0000000008eea000 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=00000000000000000000000000000000 XMM01=ae4c85c16f42cda87b48250958368d61 XMM02=000000000011f3c0d59e07bde36eea69 XMM03=000000000011f4e8ec2efd57dc4c00df XMM04=27bc34c854a45ea800000000000ae988 XMM05=abb2f480c046a5900000000000134110 XMM06=c291bd5c70af25b90000000000132b90 XMM07=fb795ef6d65770560000000000123190 XMM08=2c67c8bc2e329bc3000000000011f4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f647c832a50 RBX=00007ffd236d72d0 RCX=00007ffd236d71f0 RDX=0000000000000010 RSI=000000000000002c RDI=00007f647ce1b060 RBP=00007ffd236d7400 RSP=00007ffd236d7170 R8 =0000555b4cf108c0 R9 =00007ffd236d7300 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007f647ce049ed RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f647c279900 00000000 00000000 GS =0000 0000000000000000 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=00007f647c8323ec CR3=0000000009492000 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