[ 23.776912] BUG: Bad rss-counter state mm:00000000041b9b26 type:MM_FILEPAGES val:33 [ 23.777928] BUG: Bad rss-counter state mm:00000000041b9b26 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.941663] ================================================================== [ 23.942560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.943498] Read of size 8 at addr ffff88800ebfa058 by task sshd/219 [ 23.944257] [ 23.944473] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.945506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.946470] Call Trace: [ 23.946805] [ 23.947087] dump_stack_lvl+0x91/0xf0 [ 23.947611] print_report+0xcc/0x620 [ 23.948092] ? __virt_addr_valid+0x102/0x340 [ 23.948637] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.949249] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.949869] kasan_report+0xbe/0xf0 [ 23.950347] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.950991] vma_interval_tree_remove+0xc75/0xec0 [ 23.951598] vma_prepare+0xc54/0x11a0 [ 23.952069] __split_vma+0x5af/0x950 [ 23.952542] ? __pfx___split_vma+0x10/0x10 [ 23.953064] ? find_held_lock+0x2c/0x110 [ 23.953588] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.954150] ? lock_is_held_type+0x9f/0x120 [ 23.954692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.955290] ? mtree_range_walk+0x632/0x900 [ 23.955836] ? mas_walk+0x5c7/0x7c0 [ 23.956309] do_vmi_munmap+0x1f1/0x2b0 [ 23.956802] mmap_region+0x1f9/0x2660 [ 23.957280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.957787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.958499] ? __pfx_lock_acquire+0x10/0x10 [ 23.959046] ? __pfx_mmap_region+0x10/0x10 [ 23.959569] ? security_mmap_addr+0x7d/0xa0 [ 23.960090] ? get_unmapped_area+0x1f5/0x3f0 [ 23.960638] do_mmap+0x854/0xf00 [ 23.961074] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.961564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.962126] ksys_mmap_pgoff+0x3af/0x500 [ 23.962640] do_syscall_64+0x3f/0x90 [ 23.963115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.963753] RIP: 0033:0x7f9f9691cd82 [ 23.964205] 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 [ 23.966301] RSP: 002b:00007ffd1d4f5678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.967198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f9691cd82 [ 23.968037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f95d56000 [ 23.968883] RBP: 00007f9f95d56000 R08: 0000000000000009 R09: 0000000000001000 [ 23.969733] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cabb7f7ec0 [ 23.970589] R13: 00007ffd1d4f5690 R14: 00007ffd1d4f56c0 R15: 00007ffd1d4f5a20 [ 23.971444] [ 23.971745] [ 23.971962] Allocated by task 212: [ 23.972403] kasan_save_stack+0x22/0x50 [ 23.972927] kasan_set_track+0x25/0x30 [ 23.973437] __kasan_slab_alloc+0x59/0x70 [ 23.973979] kmem_cache_alloc+0x16b/0x370 [ 23.974515] vm_area_dup+0x20/0x160 [ 23.974988] __split_vma+0x170/0x950 [ 23.975470] split_vma+0xc6/0x110 [ 23.975920] mprotect_fixup+0x8d2/0xb30 [ 23.976437] do_mprotect_pkey+0x87e/0xd40 [ 23.976975] __x64_sys_mprotect+0x78/0xc0 [ 23.977522] do_syscall_64+0x3f/0x90 [ 23.978010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.978694] [ 23.978915] Freed by task 19: [ 23.979309] kasan_save_stack+0x22/0x50 [ 23.979832] kasan_set_track+0x25/0x30 [ 23.980334] kasan_save_free_info+0x2b/0x50 [ 23.980871] __kasan_slab_free+0x10a/0x190 [ 23.981416] kmem_cache_free+0x10d/0x4d0 [ 23.981934] rcu_core+0x8c8/0x2860 [ 23.982393] __do_softirq+0x1b7/0x7d4 [ 23.982888] [ 23.983111] Last potentially related work creation: [ 23.983715] kasan_save_stack+0x22/0x50 [ 23.984226] __kasan_record_aux_stack+0x8e/0xa0 [ 23.984812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.985479] remove_vma+0x139/0x170 [ 23.985945] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.986536] do_vmi_munmap+0x1f1/0x2b0 [ 23.987088] __vm_munmap+0x138/0x3a0 [ 23.987569] __x64_sys_munmap+0x59/0x80 [ 23.988075] do_syscall_64+0x3f/0x90 [ 23.988567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.989224] [ 23.989442] The buggy address belongs to the object at ffff88800ebfa000 [ 23.989442] which belongs to the cache vm_area_struct of size 168 [ 23.990963] The buggy address is located 88 bytes inside of [ 23.990963] freed 168-byte region [ffff88800ebfa000, ffff88800ebfa0a8) [ 23.992406] [ 23.992626] The buggy address belongs to the physical page: [ 23.993303] page:000000008914c0d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebfa [ 23.994410] memcg:ffff88800ecfd901 [ 23.994848] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.995514] page_type: 0xffffffff() [ 23.995977] raw: 0100000000000200 ffff8880087a0c80 ffffea000024e940 dead000000000002 [ 23.996921] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecfd901 [ 23.997857] page dumped because: kasan: bad access detected [ 23.998556] [ 23.998778] Memory state around the buggy address: [ 23.999370] ffff88800ebf9f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.000250] ffff88800ebf9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.001138] >ffff88800ebfa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.002020] ^ [ 24.002777] ffff88800ebfa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.003665] ffff88800ebfa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.004539] ================================================================== [ 24.005486] Disabling lock debugging due to kernel taint [ 26.077547] BUG: Bad rss-counter state mm:000000006682c265 type:MM_FILEPAGES val:33 [ 26.078193] BUG: Bad rss-counter state mm:000000006682c265 type:MM_ANONPAGES val:22 [ 26.481021] BUG: Bad rss-counter state mm:00000000f915cd57 type:MM_FILEPAGES val:33 [ 26.482046] BUG: Bad rss-counter state mm:00000000f915cd57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49671' (ECDSA) to the list of known hosts. 2023/06/21 04:44:23 fuzzer started 2023/06/21 04:44:23 dialing manager at localhost:36067 2023/06/21 04:44:23 checking machine... 2023/06/21 04:44:23 checking revisions... [ 27.212287] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:44:23 testing simple program... [ 27.264742] cgroup: Unknown subsys name 'net' [ 27.319543] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff84601449 RDX=0000000000036014 RSI=0000000000036014 RDI=ffffffff865c1a40 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000000 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff8113077a 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 00007eff03b1c900 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=00007eff040d40b0 CR3=0000000016e4c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffec2e92668 CR3=000000000f1b8000 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=34343a3430203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000