syzkaller login: [ 33.592613] BUG: Bad rss-counter state mm:00000000aa8c6fbf type:MM_FILEPAGES val:33 [ 33.593825] BUG: Bad rss-counter state mm:00000000aa8c6fbf type:MM_ANONPAGES val:22 [ 33.747555] ================================================================== [ 33.748655] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.749775] Read of size 8 at addr ffff88801a129140 by task sshd/220 [ 33.750822] [ 33.751085] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.751960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.752955] Call Trace: [ 33.753286] [ 33.753575] dump_stack_lvl+0x91/0xf0 [ 33.754075] print_report+0xcc/0x620 [ 33.754570] ? __virt_addr_valid+0x102/0x340 [ 33.755141] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.755767] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.756395] kasan_report+0xbe/0xf0 [ 33.756875] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.757506] vma_interval_tree_remove+0xc75/0xec0 [ 33.758139] vma_prepare+0xc54/0x11a0 [ 33.758658] __split_vma+0x5af/0x950 [ 33.759148] ? __pfx___split_vma+0x10/0x10 [ 33.759703] ? find_held_lock+0x2c/0x110 [ 33.760246] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.760819] ? lock_is_held_type+0x9f/0x120 [ 33.761368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.762005] ? mtree_range_walk+0x632/0x900 [ 33.762582] ? mas_walk+0x5c7/0x7c0 [ 33.763061] do_vmi_munmap+0x1f1/0x2b0 [ 33.763557] mmap_region+0x1f9/0x2660 [ 33.764051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.764582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.765316] ? __pfx_lock_acquire+0x10/0x10 [ 33.765875] ? __pfx_mmap_region+0x10/0x10 [ 33.766437] ? security_mmap_addr+0x7d/0xa0 [ 33.767004] ? get_unmapped_area+0x1f5/0x3f0 [ 33.767580] do_mmap+0x854/0xf00 [ 33.768037] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.768561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.769140] ksys_mmap_pgoff+0x3af/0x500 [ 33.769671] do_syscall_64+0x3f/0x90 [ 33.770164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.770856] RIP: 0033:0x7f8c78f67d82 [ 33.771328] 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 [ 33.773532] RSP: 002b:00007ffc799bba98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.774463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c78f67d82 [ 33.775340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c783a1000 [ 33.776204] RBP: 00007f8c783a1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.777078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa167daec0 [ 33.777949] R13: 00007ffc799bbab0 R14: 00007ffc799bbae0 R15: 00007ffc799bbe40 [ 33.778830] [ 33.779131] [ 33.779348] Allocated by task 213: [ 33.779807] kasan_save_stack+0x22/0x50 [ 33.780330] kasan_set_track+0x25/0x30 [ 33.780839] __kasan_slab_alloc+0x59/0x70 [ 33.781365] kmem_cache_alloc+0x16b/0x370 [ 33.781894] vm_area_dup+0x20/0x160 [ 33.782366] __split_vma+0x170/0x950 [ 33.782868] split_vma+0xc6/0x110 [ 33.783326] mprotect_fixup+0x8d2/0xb30 [ 33.783843] do_mprotect_pkey+0x87e/0xd40 [ 33.784389] __x64_sys_mprotect+0x78/0xc0 [ 33.784927] do_syscall_64+0x3f/0x90 [ 33.785413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.786079] [ 33.786299] Freed by task 213: [ 33.786696] kasan_save_stack+0x22/0x50 [ 33.787217] kasan_set_track+0x25/0x30 [ 33.787729] kasan_save_free_info+0x2b/0x50 [ 33.788271] __kasan_slab_free+0x10a/0x190 [ 33.788835] kmem_cache_free+0x10d/0x4d0 [ 33.789348] rcu_core+0x8c8/0x2860 [ 33.789804] __do_softirq+0x1b7/0x7d4 [ 33.790315] [ 33.790544] Last potentially related work creation: [ 33.791171] kasan_save_stack+0x22/0x50 [ 33.791697] __kasan_record_aux_stack+0x8e/0xa0 [ 33.792294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.792962] remove_vma+0x139/0x170 [ 33.793429] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.794003] do_vmi_munmap+0x1f1/0x2b0 [ 33.794521] __vm_munmap+0x138/0x3a0 [ 33.795002] __x64_sys_munmap+0x59/0x80 [ 33.795509] do_syscall_64+0x3f/0x90 [ 33.796005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.796667] [ 33.796881] The buggy address belongs to the object at ffff88801a1290e8 [ 33.796881] which belongs to the cache vm_area_struct of size 168 [ 33.798384] The buggy address is located 88 bytes inside of [ 33.798384] freed 168-byte region [ffff88801a1290e8, ffff88801a129190) [ 33.799826] [ 33.800048] The buggy address belongs to the physical page: [ 33.800721] page:00000000ebfdbaee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a129 [ 33.801841] memcg:ffff88800f8e4a01 [ 33.802290] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.802965] page_type: 0xffffffff() [ 33.803428] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.804388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f8e4a01 [ 33.805325] page dumped because: kasan: bad access detected [ 33.806000] [ 33.806218] Memory state around the buggy address: [ 33.806839] ffff88801a129000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.807716] ffff88801a129080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.808586] >ffff88801a129100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.809461] ^ [ 33.810116] ffff88801a129180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.811011] ffff88801a129200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.811884] ================================================================== [ 33.812874] Disabling lock debugging due to kernel taint [ 35.749781] BUG: Bad rss-counter state mm:000000001f2d8a2d type:MM_FILEPAGES val:33 [ 35.750883] BUG: Bad rss-counter state mm:000000001f2d8a2d type:MM_ANONPAGES val:22 [ 36.379292] BUG: Bad rss-counter state mm:000000003191eafc type:MM_FILEPAGES val:33 [ 36.380465] BUG: Bad rss-counter state mm:000000003191eafc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8095' (ECDSA) to the list of known hosts. 2023/06/20 04:20:44 fuzzer started 2023/06/20 04:20:44 dialing manager at localhost:44161 2023/06/20 04:20:44 checking machine... 2023/06/20 04:20:44 checking revisions... [ 37.021606] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:20:44 testing simple program... [ 37.068740] cgroup: Unknown subsys name 'net' [ 37.111200] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:20:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88801475fbe0 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff110028ebf7d RIP=ffffffff845308c8 RFL=00000002 [-------] 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 00007f10d3294900 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=00007f10d26c9330 CR3=000000000c66c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a8046dc97af3c24100000000000ae988 XMM05=dbf51a81efcbbecd0000000000135048 XMM06=19e9129bd510f2350000000000133ee0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110027380a5 RBX=ffff888013a472c8 RCX=0000000000000000 RDX=ffff88801a391b40 RSI=ffffffff81f4ca74 RDI=ffff88800c492a08 RBP=ffff8880139c0528 RSP=ffff88800fb7f978 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000020 R11=00000000000b6996 R12=dffffc0000000000 R13=00000000000002f1 R14=00000000000002f1 R15=ffff8880139bee00 RIP=ffffffff81f4ca8a 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 00007f73509d6900 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=00007ffdd98f0000 CR3=000000000c528000 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