syzkaller login: [ 30.673248] BUG: Bad rss-counter state mm:000000007f3c40c1 type:MM_FILEPAGES val:33 [ 30.674458] BUG: Bad rss-counter state mm:000000007f3c40c1 type:MM_ANONPAGES val:22 [ 30.713300] ================================================================== [ 30.714275] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.715223] Read of size 8 at addr ffff88800a3b26b0 by task sshd/219 [ 30.715984] [ 30.716213] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.717077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.718054] Call Trace: [ 30.718373] [ 30.718660] dump_stack_lvl+0x91/0xf0 [ 30.719149] print_report+0xcc/0x620 [ 30.719640] ? __virt_addr_valid+0x102/0x340 [ 30.720207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.720818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.721439] kasan_report+0xbe/0xf0 [ 30.721912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722554] vma_interval_tree_remove+0xc75/0xec0 [ 30.723154] vma_prepare+0xc54/0x11a0 [ 30.723626] __split_vma+0x5af/0x950 [ 30.724105] ? __pfx___split_vma+0x10/0x10 [ 30.724634] ? find_held_lock+0x2c/0x110 [ 30.725151] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.725713] ? lock_is_held_type+0x9f/0x120 [ 30.726247] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.726859] ? mtree_range_walk+0x632/0x900 [ 30.727412] ? mas_walk+0x5c7/0x7c0 [ 30.727891] do_vmi_munmap+0x1f1/0x2b0 [ 30.728392] mmap_region+0x1f9/0x2660 [ 30.728880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.729393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.730117] ? __pfx_lock_acquire+0x10/0x10 [ 30.730646] ? __pfx_mmap_region+0x10/0x10 [ 30.731176] ? security_mmap_addr+0x7d/0xa0 [ 30.731714] ? get_unmapped_area+0x1f5/0x3f0 [ 30.732282] do_mmap+0x854/0xf00 [ 30.732726] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.733222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.733783] ksys_mmap_pgoff+0x3af/0x500 [ 30.734289] do_syscall_64+0x3f/0x90 [ 30.734766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735411] RIP: 0033:0x7f35b0f7ad82 [ 30.735867] 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 [ 30.738001] RSP: 002b:00007ffd198b5928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.738910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35b0f7ad82 [ 30.739777] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35b03b4000 [ 30.740645] RBP: 00007f35b03b4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.741604] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624ee06aec0 [ 30.742456] R13: 00007ffd198b5940 R14: 00007ffd198b5970 R15: 00007ffd198b5cd0 [ 30.743332] [ 30.743625] [ 30.743841] Allocated by task 212: [ 30.744279] kasan_save_stack+0x22/0x50 [ 30.744787] kasan_set_track+0x25/0x30 [ 30.745282] __kasan_slab_alloc+0x59/0x70 [ 30.745811] kmem_cache_alloc+0x16b/0x370 [ 30.746338] vm_area_dup+0x20/0x160 [ 30.746797] __split_vma+0x170/0x950 [ 30.747262] split_vma+0xc6/0x110 [ 30.747700] mprotect_fixup+0x8d2/0xb30 [ 30.748218] do_mprotect_pkey+0x87e/0xd40 [ 30.748747] __x64_sys_mprotect+0x78/0xc0 [ 30.749267] do_syscall_64+0x3f/0x90 [ 30.749749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750392] [ 30.750610] Freed by task 212: [ 30.751009] kasan_save_stack+0x22/0x50 [ 30.751524] kasan_set_track+0x25/0x30 [ 30.752019] kasan_save_free_info+0x2b/0x50 [ 30.752560] __kasan_slab_free+0x10a/0x190 [ 30.753098] kmem_cache_free+0x10d/0x4d0 [ 30.753605] rcu_core+0x8c8/0x2860 [ 30.754049] __do_softirq+0x1b7/0x7d4 [ 30.754531] [ 30.754745] Last potentially related work creation: [ 30.755337] kasan_save_stack+0x22/0x50 [ 30.755842] __kasan_record_aux_stack+0x8e/0xa0 [ 30.756425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.757088] remove_vma+0x139/0x170 [ 30.757546] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.758117] do_vmi_munmap+0x1f1/0x2b0 [ 30.758602] __vm_munmap+0x138/0x3a0 [ 30.759076] __x64_sys_munmap+0x59/0x80 [ 30.759580] do_syscall_64+0x3f/0x90 [ 30.760061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760725] [ 30.760943] Second to last potentially related work creation: [ 30.761628] kasan_save_stack+0x22/0x50 [ 30.762131] __kasan_record_aux_stack+0x8e/0xa0 [ 30.762709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.763351] remove_vma+0x139/0x170 [ 30.763811] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.764376] do_vmi_munmap+0x1f1/0x2b0 [ 30.764858] mmap_region+0x1f9/0x2660 [ 30.765334] do_mmap+0x854/0xf00 [ 30.765770] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.766261] ksys_mmap_pgoff+0x3af/0x500 [ 30.766768] do_syscall_64+0x3f/0x90 [ 30.767248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767906] [ 30.768127] The buggy address belongs to the object at ffff88800a3b2658 [ 30.768127] which belongs to the cache vm_area_struct of size 168 [ 30.769583] The buggy address is located 88 bytes inside of [ 30.769583] freed 168-byte region [ffff88800a3b2658, ffff88800a3b2700) [ 30.770976] [ 30.771192] The buggy address belongs to the physical page: [ 30.771865] page:00000000cf8a9319 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa3b2 [ 30.772967] memcg:ffff88800ebfdf01 [ 30.773389] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.774123] page_type: 0xffffffff() [ 30.774596] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.775536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebfdf01 [ 30.776459] page dumped because: kasan: bad access detected [ 30.777138] [ 30.777355] Memory state around the buggy address: [ 30.777943] ffff88800a3b2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.778811] ffff88800a3b2600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.779680] >ffff88800a3b2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.780572] ^ [ 30.781168] ffff88800a3b2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.782059] ffff88800a3b2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.782935] ================================================================== [ 30.784345] Disabling lock debugging due to kernel taint [ 32.477494] BUG: Bad rss-counter state mm:00000000683cbd97 type:MM_FILEPAGES val:33 [ 32.478526] BUG: Bad rss-counter state mm:00000000683cbd97 type:MM_ANONPAGES val:22 [ 32.888946] BUG: Bad rss-counter state mm:000000006d4e15e6 type:MM_FILEPAGES val:33 [ 32.889445] BUG: Bad rss-counter state mm:000000006d4e15e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6543' (ECDSA) to the list of known hosts. 2023/06/20 11:10:30 fuzzer started 2023/06/20 11:10:31 dialing manager at localhost:36067 2023/06/20 11:10:31 checking machine... 2023/06/20 11:10:31 checking revisions... [ 33.605166] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:10:31 testing simple program... [ 33.652489] cgroup: Unknown subsys name 'net' [ 33.695978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:10:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f44ec8c0bf0 CR3=000000000d742000 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=05e9c4ed27e9c1867d4d9d958c504b46 XMM02=2c67c8bc2e329bc30000000000119c80 XMM03=fb795ef6d657705600000000001210e8 XMM04=df4a865ce71ed92a00000000000ae988 XMM05=dfcdbad4f1609c370000000000132208 XMM06=3c7722ae27d11d4f0000000000131070 XMM07=e042d86d42eb936e0000000000121368 XMM08=b6006319a02e026b0000000000119ce0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018dc7098 RCX=0000000000000001 RDX=1ffff110031b8e24 RSI=ffffffff8180a8e9 RDI=ffff888018dc70a4 RBP=ffff888018dc7120 RSP=ffff888018dc6fb0 R8 =0000000000000001 R9 =ffff888018dc7010 R10=0000000000038001 R11=0000000000020de5 R12=ffff888018dc7098 R13=0000000000000000 R14=ffff888015acb680 R15=0000000000000000 RIP=ffffffff813ad547 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 00007f5103a53900 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=00007f5103a0c008 CR3=000000000dc50000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000