[ 23.861077] BUG: Bad rss-counter state mm:0000000052541f43 type:MM_FILEPAGES val:33 [ 23.861810] BUG: Bad rss-counter state mm:0000000052541f43 type:MM_ANONPAGES val:22 [ 24.033170] ================================================================== [ 24.034088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.035030] Read of size 8 at addr ffff88800e5d04e0 by task sshd/221 [ 24.035825] [ 24.036152] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.037051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.038050] Call Trace: [ 24.038389] [ 24.038676] dump_stack_lvl+0x91/0xf0 [ 24.039168] print_report+0xcc/0x620 [ 24.039679] ? __virt_addr_valid+0x102/0x340 [ 24.040231] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.040848] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.041465] kasan_report+0xbe/0xf0 [ 24.041946] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.042572] vma_interval_tree_remove+0xc75/0xec0 [ 24.043176] vma_prepare+0xc54/0x11a0 [ 24.043665] __split_vma+0x5af/0x950 [ 24.044136] ? __pfx___split_vma+0x10/0x10 [ 24.044670] ? find_held_lock+0x2c/0x110 [ 24.045186] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.045747] ? lock_is_held_type+0x9f/0x120 [ 24.046295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.046911] ? mtree_range_walk+0x632/0x900 [ 24.047461] ? mas_walk+0x5c7/0x7c0 [ 24.047957] do_vmi_munmap+0x1f1/0x2b0 [ 24.048447] mmap_region+0x1f9/0x2660 [ 24.048940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.049447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.050157] ? __pfx_lock_acquire+0x10/0x10 [ 24.050693] ? __pfx_mmap_region+0x10/0x10 [ 24.051217] ? security_mmap_addr+0x7d/0xa0 [ 24.051773] ? get_unmapped_area+0x1f5/0x3f0 [ 24.052340] do_mmap+0x854/0xf00 [ 24.052786] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.053277] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.053847] ksys_mmap_pgoff+0x3af/0x500 [ 24.054350] do_syscall_64+0x3f/0x90 [ 24.054841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.055495] RIP: 0033:0x7f17bd4e7d82 [ 24.055973] 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 [ 24.058090] RSP: 002b:00007ffd486ab6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.058987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17bd4e7d82 [ 24.059861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17bc921000 [ 24.060710] RBP: 00007f17bc921000 R08: 0000000000000009 R09: 0000000000001000 [ 24.061550] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc87e3ef70 [ 24.062389] R13: 00007ffd486ab700 R14: 00007ffd486ab730 R15: 00007ffd486aba90 [ 24.063242] [ 24.063534] [ 24.063764] Allocated by task 209: [ 24.064195] kasan_save_stack+0x22/0x50 [ 24.064701] kasan_set_track+0x25/0x30 [ 24.065194] __kasan_slab_alloc+0x59/0x70 [ 24.065718] kmem_cache_alloc+0x16b/0x370 [ 24.066234] vm_area_dup+0x20/0x160 [ 24.066705] __split_vma+0x170/0x950 [ 24.067173] split_vma+0xc6/0x110 [ 24.067634] mprotect_fixup+0x8d2/0xb30 [ 24.068140] do_mprotect_pkey+0x87e/0xd40 [ 24.068661] __x64_sys_mprotect+0x78/0xc0 [ 24.069182] do_syscall_64+0x3f/0x90 [ 24.069658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.070303] [ 24.070521] Freed by task 13: [ 24.070903] kasan_save_stack+0x22/0x50 [ 24.071423] kasan_set_track+0x25/0x30 [ 24.071935] kasan_save_free_info+0x2b/0x50 [ 24.072472] __kasan_slab_free+0x10a/0x190 [ 24.073000] kmem_cache_free+0x10d/0x4d0 [ 24.073508] rcu_core+0x8c8/0x2860 [ 24.073956] __do_softirq+0x1b7/0x7d4 [ 24.074435] [ 24.074649] Last potentially related work creation: [ 24.075237] kasan_save_stack+0x22/0x50 [ 24.075760] __kasan_record_aux_stack+0x8e/0xa0 [ 24.076335] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.076988] remove_vma+0x139/0x170 [ 24.077441] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.077999] do_vmi_munmap+0x1f1/0x2b0 [ 24.078492] __vm_munmap+0x138/0x3a0 [ 24.078961] __x64_sys_munmap+0x59/0x80 [ 24.079458] do_syscall_64+0x3f/0x90 [ 24.079955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.080597] [ 24.080815] Second to last potentially related work creation: [ 24.081503] kasan_save_stack+0x22/0x50 [ 24.082008] __kasan_record_aux_stack+0x8e/0xa0 [ 24.082585] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.083239] remove_vma+0x139/0x170 [ 24.083709] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.084274] do_vmi_munmap+0x1f1/0x2b0 [ 24.084765] __vm_munmap+0x138/0x3a0 [ 24.085230] elf_map+0x26f/0x310 [ 24.085681] load_elf_binary+0xd82/0x5030 [ 24.086203] bprm_execve+0x803/0x1940 [ 24.086670] do_execveat_common+0x734/0x8e0 [ 24.087200] __x64_sys_execve+0x93/0xc0 [ 24.087711] do_syscall_64+0x3f/0x90 [ 24.088194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.088840] [ 24.089061] The buggy address belongs to the object at ffff88800e5d0488 [ 24.089061] which belongs to the cache vm_area_struct of size 168 [ 24.090526] The buggy address is located 88 bytes inside of [ 24.090526] freed 168-byte region [ffff88800e5d0488, ffff88800e5d0530) [ 24.091946] [ 24.092164] The buggy address belongs to the physical page: [ 24.092817] page:000000008aeba7be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5d0 [ 24.093910] memcg:ffff88800e1c7801 [ 24.094339] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.094989] page_type: 0xffffffff() [ 24.095441] raw: 0100000000000200 ffff8880087a0c80 ffffea000035a140 dead000000000002 [ 24.096373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1c7801 [ 24.097286] page dumped because: kasan: bad access detected [ 24.097947] [ 24.098164] Memory state around the buggy address: [ 24.098739] ffff88800e5d0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.099612] ffff88800e5d0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.100467] >ffff88800e5d0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.101324] ^ [ 24.102074] ffff88800e5d0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.102927] ffff88800e5d0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.103786] ================================================================== [ 24.104778] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.027293] BUG: Bad rss-counter state mm:00000000d2a29a7b type:MM_FILEPAGES val:33 [ 26.028862] BUG: Bad rss-counter state mm:00000000d2a29a7b type:MM_ANONPAGES val:22 [ 26.534659] BUG: Bad rss-counter state mm:000000006d10a45e type:MM_FILEPAGES val:33 [ 26.535981] BUG: Bad rss-counter state mm:000000006d10a45e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20071' (ECDSA) to the list of known hosts. 2023/06/21 05:32:14 fuzzer started 2023/06/21 05:32:15 dialing manager at localhost:36067 2023/06/21 05:32:15 checking machine... 2023/06/21 05:32:15 checking revisions... [ 27.265260] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:32:15 testing simple program... [ 27.330910] cgroup: Unknown subsys name 'net' [ 27.395011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:32:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800906f118 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801cda7500 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000008d7000008d7 R12=0000000000000000 R13=0000000000000023 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1908 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 00007f566da8f900 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=00007f566e046618 CR3=000000000dd14000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f566e0470b0 CR3=0000000016dce000 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=2034313a32333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000