syzkaller login: [ 35.646002] BUG: Bad rss-counter state mm:00000000fe401d55 type:MM_FILEPAGES val:33 [ 35.647222] BUG: Bad rss-counter state mm:00000000fe401d55 type:MM_ANONPAGES val:22 [ 35.813468] ================================================================== [ 35.814382] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.815349] Read of size 8 at addr ffff88801a64b5c8 by task sshd/219 [ 35.816117] [ 35.816414] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.817304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.818277] Call Trace: [ 35.818648] <TASK> [ 35.818939] dump_stack_lvl+0x91/0xf0 [ 35.819431] print_report+0xcc/0x620 [ 35.819919] ? __virt_addr_valid+0x102/0x340 [ 35.820473] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.821089] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.821726] kasan_report+0xbe/0xf0 [ 35.822214] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.822852] vma_interval_tree_remove+0xc75/0xec0 [ 35.823449] vma_prepare+0xc54/0x11a0 [ 35.823927] __split_vma+0x5af/0x950 [ 35.824397] ? __pfx___split_vma+0x10/0x10 [ 35.824931] ? find_held_lock+0x2c/0x110 [ 35.825450] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.826016] ? lock_is_held_type+0x9f/0x120 [ 35.826549] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.827179] ? mtree_range_walk+0x632/0x900 [ 35.827728] ? mas_walk+0x5c7/0x7c0 [ 35.828200] do_vmi_munmap+0x1f1/0x2b0 [ 35.828696] mmap_region+0x1f9/0x2660 [ 35.829177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.829695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.830408] ? __pfx_lock_acquire+0x10/0x10 [ 35.830947] ? __pfx_mmap_region+0x10/0x10 [ 35.831488] ? security_mmap_addr+0x7d/0xa0 [ 35.832022] ? get_unmapped_area+0x1f5/0x3f0 [ 35.832567] do_mmap+0x854/0xf00 [ 35.833007] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.833500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.834068] ksys_mmap_pgoff+0x3af/0x500 [ 35.834581] do_syscall_64+0x3f/0x90 [ 35.835066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.835710] RIP: 0033:0x7fab59915d82 [ 35.836168] 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 [ 35.838271] RSP: 002b:00007ffe47093d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.839195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab59915d82 [ 35.840042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab58d4f000 [ 35.840879] RBP: 00007fab58d4f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.841713] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0d6fcbf70 [ 35.842550] R13: 00007ffe47093da0 R14: 00007ffe47093dd0 R15: 00007ffe47094130 [ 35.843402] </TASK> [ 35.843693] [ 35.843911] Allocated by task 212: [ 35.844336] kasan_save_stack+0x22/0x50 [ 35.844836] kasan_set_track+0x25/0x30 [ 35.845325] __kasan_slab_alloc+0x59/0x70 [ 35.845846] kmem_cache_alloc+0x16b/0x370 [ 35.846366] vm_area_dup+0x20/0x160 [ 35.846825] __split_vma+0x170/0x950 [ 35.847291] split_vma+0xc6/0x110 [ 35.847742] mprotect_fixup+0x8d2/0xb30 [ 35.848241] do_mprotect_pkey+0x87e/0xd40 [ 35.848758] __x64_sys_mprotect+0x78/0xc0 [ 35.849282] do_syscall_64+0x3f/0x90 [ 35.849751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.850399] [ 35.850630] Freed by task 212: [ 35.851026] kasan_save_stack+0x22/0x50 [ 35.851536] kasan_set_track+0x25/0x30 [ 35.852043] kasan_save_free_info+0x2b/0x50 [ 35.852578] __kasan_slab_free+0x10a/0x190 [ 35.853119] kmem_cache_free+0x10d/0x4d0 [ 35.853636] rcu_core+0x8c8/0x2860 [ 35.854082] __do_softirq+0x1b7/0x7d4 [ 35.854565] [ 35.854785] Last potentially related work creation: [ 35.855368] kasan_save_stack+0x22/0x50 [ 35.855867] __kasan_record_aux_stack+0x8e/0xa0 [ 35.856437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.857079] remove_vma+0x139/0x170 [ 35.857529] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.858090] do_vmi_munmap+0x1f1/0x2b0 [ 35.858592] __vm_munmap+0x138/0x3a0 [ 35.859062] __x64_sys_munmap+0x59/0x80 [ 35.859555] do_syscall_64+0x3f/0x90 [ 35.860024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.860665] [ 35.860882] The buggy address belongs to the object at ffff88801a64b570 [ 35.860882] which belongs to the cache vm_area_struct of size 168 [ 35.862337] The buggy address is located 88 bytes inside of [ 35.862337] freed 168-byte region [ffff88801a64b570, ffff88801a64b618) [ 35.863751] [ 35.863968] The buggy address belongs to the physical page: [ 35.864620] page:00000000c5ddd695 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a64b [ 35.865709] memcg:ffff888019584b01 [ 35.866139] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.866791] page_type: 0xffffffff() [ 35.867242] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.868168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019584b01 [ 35.869071] page dumped because: kasan: bad access detected [ 35.869739] [ 35.869955] Memory state around the buggy address: [ 35.870544] ffff88801a64b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.871421] ffff88801a64b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.872288] >ffff88801a64b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.873142] ^ [ 35.873804] ffff88801a64b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.874676] ffff88801a64b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.875533] ================================================================== [ 35.876525] Disabling lock debugging due to kernel taint [ 37.752206] BUG: Bad rss-counter state mm:000000004f3cec6d type:MM_FILEPAGES val:33 [ 37.753301] BUG: Bad rss-counter state mm:000000004f3cec6d type:MM_ANONPAGES val:22 [ 38.212201] BUG: Bad rss-counter state mm:00000000629c841f type:MM_FILEPAGES val:33 [ 38.213248] BUG: Bad rss-counter state mm:00000000629c841f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44365' (ECDSA) to the list of known hosts. 2023/06/19 18:14:09 fuzzer started 2023/06/19 18:14:09 dialing manager at localhost:44161 2023/06/19 18:14:09 checking machine... 2023/06/19 18:14:09 checking revisions... [ 38.904481] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:14:09 testing simple program... [ 38.947365] cgroup: Unknown subsys name 'net' [ 38.988599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:14:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f28b9559008 CR3=000000000c680000 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=a307d6ff74fed08ba042acb727efea6c XMM02=000000000011e6f0eff9b2d0a8fce9cb XMM03=000000000011e7c02c67c8bc2e329bc3 XMM04=663a548396c6ab2e00000000000ae988 XMM05=dfcdbad4f1609c370000000000134bc0 XMM06=e8792831355f50350000000000133a28 XMM07=e042d86d42eb936e00000000001252e0 XMM08=f0baa5810368c3f2000000000011e7c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801a667658 RCX=ffffffff86137501 RDX=1ffff110034cced6 RSI=0000000000000000 RDI=ffffffff8180c585 RBP=ffff88801a6676b0 RSP=ffff88801a667640 R8 =ffffffff8613751e R9 =ffff88801a667698 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801a667720 R13=0000000000000000 R14=ffff888010153680 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f085929e900 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=00007fffa07c8000 CR3=000000000e73e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000