[ 30.409705] BUG: Bad rss-counter state mm:00000000297dbe27 type:MM_FILEPAGES val:33 [ 30.410307] BUG: Bad rss-counter state mm:00000000297dbe27 type:MM_ANONPAGES val:22 [ 30.516340] ================================================================== [ 30.517029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.517751] Read of size 8 at addr ffff88800df0ba50 by task sshd/219 [ 30.518328] [ 30.518499] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.519151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.519900] Call Trace: [ 30.520140] [ 30.520451] dump_stack_lvl+0x91/0xf0 [ 30.520832] print_report+0xcc/0x620 [ 30.521195] ? __virt_addr_valid+0x102/0x340 [ 30.521612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.522089] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.522591] kasan_report+0xbe/0xf0 [ 30.522954] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.523427] vma_interval_tree_remove+0xc75/0xec0 [ 30.523811] vma_prepare+0xc54/0x11a0 [ 30.524088] __split_vma+0x5af/0x950 [ 30.524361] ? __pfx___split_vma+0x10/0x10 [ 30.524665] ? find_held_lock+0x2c/0x110 [ 30.524965] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.525281] ? lock_is_held_type+0x9f/0x120 [ 30.525601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.525943] ? mtree_range_walk+0x632/0x900 [ 30.526262] ? mas_walk+0x5c7/0x7c0 [ 30.526530] do_vmi_munmap+0x1f1/0x2b0 [ 30.526811] mmap_region+0x1f9/0x2660 [ 30.527086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.527376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.527781] ? __pfx_lock_acquire+0x10/0x10 [ 30.528084] ? __pfx_mmap_region+0x10/0x10 [ 30.528391] ? security_mmap_addr+0x7d/0xa0 [ 30.528698] ? get_unmapped_area+0x1f5/0x3f0 [ 30.529011] do_mmap+0x854/0xf00 [ 30.529263] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.529545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.529864] ksys_mmap_pgoff+0x3af/0x500 [ 30.530147] do_syscall_64+0x3f/0x90 [ 30.530417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.530785] RIP: 0033:0x7f6402efcd82 [ 30.531049] 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 [ 30.532288] RSP: 002b:00007ffde6bb29d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.532798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6402efcd82 [ 30.533276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6402336000 [ 30.533757] RBP: 00007f6402336000 R08: 0000000000000009 R09: 0000000000001000 [ 30.534229] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608d3947ec0 [ 30.534721] R13: 00007ffde6bb29f0 R14: 00007ffde6bb2a20 R15: 00007ffde6bb2d80 [ 30.535216] [ 30.535381] [ 30.535505] Allocated by task 212: [ 30.535750] kasan_save_stack+0x22/0x50 [ 30.536037] kasan_set_track+0x25/0x30 [ 30.536319] __kasan_slab_alloc+0x59/0x70 [ 30.536619] kmem_cache_alloc+0x16b/0x370 [ 30.536909] vm_area_dup+0x20/0x160 [ 30.537168] __split_vma+0x170/0x950 [ 30.537431] split_vma+0xc6/0x110 [ 30.537684] mprotect_fixup+0x8d2/0xb30 [ 30.537973] do_mprotect_pkey+0x87e/0xd40 [ 30.538265] __x64_sys_mprotect+0x78/0xc0 [ 30.538561] do_syscall_64+0x3f/0x90 [ 30.538833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.539202] [ 30.539325] Freed by task 13: [ 30.539540] kasan_save_stack+0x22/0x50 [ 30.539825] kasan_set_track+0x25/0x30 [ 30.540105] kasan_save_free_info+0x2b/0x50 [ 30.540426] __kasan_slab_free+0x10a/0x190 [ 30.540729] kmem_cache_free+0x10d/0x4d0 [ 30.541014] rcu_core+0x8c8/0x2860 [ 30.541261] __do_softirq+0x1b7/0x7d4 [ 30.541532] [ 30.541653] Last potentially related work creation: [ 30.541985] kasan_save_stack+0x22/0x50 [ 30.542269] __kasan_record_aux_stack+0x8e/0xa0 [ 30.542598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.542961] remove_vma+0x139/0x170 [ 30.543215] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.543534] do_vmi_munmap+0x1f1/0x2b0 [ 30.543805] __vm_munmap+0x138/0x3a0 [ 30.544071] __x64_sys_munmap+0x59/0x80 [ 30.544364] do_syscall_64+0x3f/0x90 [ 30.544637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.545001] [ 30.545122] Second to last potentially related work creation: [ 30.545509] kasan_save_stack+0x22/0x50 [ 30.545795] __kasan_record_aux_stack+0x8e/0xa0 [ 30.546117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.546482] remove_vma+0x139/0x170 [ 30.546739] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.547049] do_vmi_munmap+0x1f1/0x2b0 [ 30.547322] mmap_region+0x1f9/0x2660 [ 30.547596] do_mmap+0x854/0xf00 [ 30.547837] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.548113] ksys_mmap_pgoff+0x3af/0x500 [ 30.548387] do_syscall_64+0x3f/0x90 [ 30.548643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.548990] [ 30.549106] The buggy address belongs to the object at ffff88800df0b9f8 [ 30.549106] which belongs to the cache vm_area_struct of size 168 [ 30.549896] The buggy address is located 88 bytes inside of [ 30.549896] freed 168-byte region [ffff88800df0b9f8, ffff88800df0baa0) [ 30.550655] [ 30.550770] The buggy address belongs to the physical page: [ 30.551121] page:0000000031c6fcee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf0b [ 30.551705] memcg:ffff88800e948c01 [ 30.551933] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.552290] page_type: 0xffffffff() [ 30.552532] raw: 0100000000000200 ffff8880087a0c80 ffffea00003716c0 dead000000000002 [ 30.553022] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e948c01 [ 30.553504] page dumped because: kasan: bad access detected [ 30.553860] [ 30.553975] Memory state around the buggy address: [ 30.554283] ffff88800df0b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.554748] ffff88800df0b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.555206] >ffff88800df0ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.555665] ^ [ 30.556037] ffff88800df0ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.556498] ffff88800df0bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.556954] ================================================================== [ 30.557485] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.409381] BUG: Bad rss-counter state mm:0000000029882260 type:MM_FILEPAGES val:33 [ 32.410083] BUG: Bad rss-counter state mm:0000000029882260 type:MM_ANONPAGES val:22 [ 32.913013] BUG: Bad rss-counter state mm:000000008ba6f5b0 type:MM_FILEPAGES val:33 [ 32.914130] BUG: Bad rss-counter state mm:000000008ba6f5b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38867' (ECDSA) to the list of known hosts. 2023/06/20 20:51:30 fuzzer started 2023/06/20 20:51:31 dialing manager at localhost:36067 2023/06/20 20:51:31 checking machine... 2023/06/20 20:51:31 checking revisions... [ 33.562759] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:51:31 testing simple program... [ 33.614845] cgroup: Unknown subsys name 'net' [ 33.654911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:51:30 Registers: info registers vcpu 0 RAX=ffff8880102f8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880102f7c01 RSI=ffff8880102f7cd0 RDI=ffff8880102f79d0 RBP=ffff8880102f7cd0 RSP=ffff8880102f7928 R8 =ffffffff86121aba R9 =ffff8880102f7a00 R10=0000000000038001 R11=000000000001cf91 R12=0000000000000008 R13=ffff8880102f0000 R14=ffff8880102f7cd8 R15=ffff8880102f79c0 RIP=ffffffff811304ce RFL=00000292 [--S-A--] 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 00007f4c09755900 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=00007f4c09d0a650 CR3=000000000e67a000 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880146f8000 RSI=ffffffff81658121 RDI=0000000000000007 RBP=ffffea00005efd40 RSP=ffff8880146f7b98 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffffea00005efd08 R13=ffff88800ba14cb0 R14=ffff88800ba14cb0 R15=0000000000000001 RIP=ffffffff814c0864 RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f31c2a26900 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=00007f31c1e3f670 CR3=000000000ca52000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4e12c385f064527500000000000ae988 XMM05=0d41f7121eff3fbf00000000001334b8 XMM06=806171799158d9670000000000131c68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000