syzkaller login: [ 31.294457] BUG: Bad rss-counter state mm:000000005e4809ca type:MM_FILEPAGES val:33 [ 31.295688] BUG: Bad rss-counter state mm:000000005e4809ca type:MM_ANONPAGES val:22 [ 31.397378] ================================================================== [ 31.398331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.399270] Read of size 8 at addr ffff88800ecb53f8 by task sshd/220 [ 31.400042] [ 31.400264] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.401306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.402288] Call Trace: [ 31.402607] [ 31.402938] dump_stack_lvl+0x91/0xf0 [ 31.403434] print_report+0xcc/0x620 [ 31.403929] ? __virt_addr_valid+0x102/0x340 [ 31.404504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405120] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405743] kasan_report+0xbe/0xf0 [ 31.406226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406857] vma_interval_tree_remove+0xc75/0xec0 [ 31.407471] vma_prepare+0xc54/0x11a0 [ 31.407956] __split_vma+0x5af/0x950 [ 31.408450] ? __pfx___split_vma+0x10/0x10 [ 31.408990] ? find_held_lock+0x2c/0x110 [ 31.409519] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.410098] ? lock_is_held_type+0x9f/0x120 [ 31.410649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.411263] ? mtree_range_walk+0x632/0x900 [ 31.411834] ? mas_walk+0x5c7/0x7c0 [ 31.412337] do_vmi_munmap+0x1f1/0x2b0 [ 31.412839] mmap_region+0x1f9/0x2660 [ 31.413330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.413849] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.414570] ? __pfx_lock_acquire+0x10/0x10 [ 31.415116] ? __pfx_mmap_region+0x10/0x10 [ 31.415657] ? security_mmap_addr+0x7d/0xa0 [ 31.416201] ? get_unmapped_area+0x1f5/0x3f0 [ 31.416769] do_mmap+0x854/0xf00 [ 31.417226] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.417736] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.418313] ksys_mmap_pgoff+0x3af/0x500 [ 31.418829] do_syscall_64+0x3f/0x90 [ 31.419334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.419985] RIP: 0033:0x7fb33e06dd82 [ 31.420473] 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 [ 31.422625] RSP: 002b:00007ffcabf672d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.423547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb33e06dd82 [ 31.424435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb33d4a7000 [ 31.425309] RBP: 00007fb33d4a7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.426176] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a8c399ec0 [ 31.427029] R13: 00007ffcabf672f0 R14: 00007ffcabf67320 R15: 00007ffcabf67680 [ 31.427901] [ 31.428199] [ 31.428425] Allocated by task 213: [ 31.428868] kasan_save_stack+0x22/0x50 [ 31.429388] kasan_set_track+0x25/0x30 [ 31.429890] __kasan_slab_alloc+0x59/0x70 [ 31.430421] kmem_cache_alloc+0x16b/0x370 [ 31.430949] vm_area_dup+0x20/0x160 [ 31.431412] __split_vma+0x170/0x950 [ 31.431883] split_vma+0xc6/0x110 [ 31.432343] mprotect_fixup+0x8d2/0xb30 [ 31.432851] do_mprotect_pkey+0x87e/0xd40 [ 31.433380] __x64_sys_mprotect+0x78/0xc0 [ 31.433911] do_syscall_64+0x3f/0x90 [ 31.434397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435067] [ 31.435287] Freed by task 213: [ 31.435690] kasan_save_stack+0x22/0x50 [ 31.436204] kasan_set_track+0x25/0x30 [ 31.436725] kasan_save_free_info+0x2b/0x50 [ 31.437274] __kasan_slab_free+0x10a/0x190 [ 31.437824] kmem_cache_free+0x10d/0x4d0 [ 31.438343] rcu_core+0x8c8/0x2860 [ 31.438806] __do_softirq+0x1b7/0x7d4 [ 31.439295] [ 31.439514] Last potentially related work creation: [ 31.440104] kasan_save_stack+0x22/0x50 [ 31.440624] __kasan_record_aux_stack+0x8e/0xa0 [ 31.441212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.441932] remove_vma+0x139/0x170 [ 31.442390] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.442960] do_vmi_munmap+0x1f1/0x2b0 [ 31.443463] __vm_munmap+0x138/0x3a0 [ 31.443940] __x64_sys_munmap+0x59/0x80 [ 31.444470] do_syscall_64+0x3f/0x90 [ 31.444951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.445612] [ 31.445833] The buggy address belongs to the object at ffff88800ecb53a0 [ 31.445833] which belongs to the cache vm_area_struct of size 168 [ 31.447344] The buggy address is located 88 bytes inside of [ 31.447344] freed 168-byte region [ffff88800ecb53a0, ffff88800ecb5448) [ 31.448783] [ 31.449009] The buggy address belongs to the physical page: [ 31.449664] page:00000000f2f75df8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb5 [ 31.450742] memcg:ffff888016b52e01 [ 31.451171] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.451813] page_type: 0xffffffff() [ 31.452286] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.453212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b52e01 [ 31.454125] page dumped because: kasan: bad access detected [ 31.454789] [ 31.455006] Memory state around the buggy address: [ 31.455590] ffff88800ecb5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.456456] ffff88800ecb5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.457310] >ffff88800ecb5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.458156] ^ [ 31.459007] ffff88800ecb5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.459859] ffff88800ecb5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.460719] ================================================================== [ 31.461654] Disabling lock debugging due to kernel taint [ 33.013874] BUG: Bad rss-counter state mm:000000004ebcdc8b type:MM_FILEPAGES val:33 [ 33.014689] BUG: Bad rss-counter state mm:000000004ebcdc8b type:MM_ANONPAGES val:22 [ 33.411552] BUG: Bad rss-counter state mm:0000000007091432 type:MM_FILEPAGES val:32 [ 33.412363] BUG: Bad rss-counter state mm:0000000007091432 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50633' (ECDSA) to the list of known hosts. 2023/06/20 10:56:49 fuzzer started 2023/06/20 10:56:50 dialing manager at localhost:36067 2023/06/20 10:56:50 checking machine... 2023/06/20 10:56:50 checking revisions... [ 34.060606] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:56:50 testing simple program... [ 34.108574] cgroup: Unknown subsys name 'net' [ 34.187914] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:49 Registers: info registers vcpu 0 RAX=0101010101010101 RBX=ffff88801036e390 RCX=0000000000000000 RDX=000000000000001e RSI=0000000000000000 RDI=ffffed100206dc72 RBP=00000000000000f0 RSP=ffff88800f2a7c38 R8 =ffff88801036e390 R9 =0000000000000000 R10=ffffed100206dc72 R11=ffffffff81806f71 R12=ffff88801036e390 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff845133e5 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 00007fcba4623900 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=00007fcba4bd8650 CR3=000000000cc04000 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=00007f782ad730b0 CR3=000000000d67a000 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=92f37861f236bdaa88451617f58122c2 XMM02=ec2efd57dc4c00df0000000000119d60 XMM03=3f16c66b9320d1750000000000119e30 XMM04=3845b6254e4d79f100000000000ae988 XMM05=19e9129bd510f2350000000000131538 XMM06=5604297f283b969c00000000001303a0 XMM07=e042d86d42eb936e00000000001219d0 XMM08=3f16c66b9320d1750000000000119e30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000