syzkaller login: [ 60.611188] BUG: Bad rss-counter state mm:00000000d5f8d1ac type:MM_FILEPAGES val:33 [ 60.611918] BUG: Bad rss-counter state mm:00000000d5f8d1ac type:MM_ANONPAGES val:22 [ 60.746991] ================================================================== [ 60.747637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.748252] Read of size 8 at addr ffff88800f69d6b0 by task sshd/225 [ 60.748748] [ 60.748892] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.749446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.750089] Call Trace: [ 60.750318] [ 60.750533] dump_stack_lvl+0x91/0xf0 [ 60.750964] print_report+0xcc/0x620 [ 60.751273] ? __virt_addr_valid+0x102/0x340 [ 60.751904] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.752309] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.752702] kasan_report+0xbe/0xf0 [ 60.753013] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.753414] vma_interval_tree_remove+0xc75/0xec0 [ 60.753846] vma_prepare+0xc54/0x11a0 [ 60.754194] __split_vma+0x5af/0x950 [ 60.754492] ? __pfx___split_vma+0x10/0x10 [ 60.754871] ? find_held_lock+0x2c/0x110 [ 60.755217] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.755586] ? lock_is_held_type+0x9f/0x120 [ 60.755939] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.756329] ? mtree_range_walk+0x632/0x900 [ 60.756690] ? mas_walk+0x5c7/0x7c0 [ 60.756999] do_vmi_munmap+0x1f1/0x2b0 [ 60.757315] mmap_region+0x1f9/0x2660 [ 60.757632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.757970] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.758447] ? __pfx_lock_acquire+0x10/0x10 [ 60.758903] ? __pfx_mmap_region+0x10/0x10 [ 60.759289] ? security_mmap_addr+0x7d/0xa0 [ 60.759641] ? get_unmapped_area+0x1f5/0x3f0 [ 60.759994] do_mmap+0x854/0xf00 [ 60.760278] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.760600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.760976] ksys_mmap_pgoff+0x3af/0x500 [ 60.761297] do_syscall_64+0x3f/0x90 [ 60.761608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.762024] RIP: 0033:0x7ff1b55c5d82 [ 60.762321] 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 [ 60.763799] RSP: 002b:00007ffe9dd43048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.764428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1b55c5d82 [ 60.765005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1b49ff000 [ 60.765553] RBP: 00007ff1b49ff000 R08: 0000000000000009 R09: 0000000000001000 [ 60.766105] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dacffc0b20 [ 60.766651] R13: 00007ffe9dd43060 R14: 00007ffe9dd43090 R15: 00007ffe9dd433f0 [ 60.767253] [ 60.767440] [ 60.767579] Allocated by task 218: [ 60.767851] kasan_save_stack+0x22/0x50 [ 60.768202] kasan_set_track+0x25/0x30 [ 60.768522] __kasan_slab_alloc+0x59/0x70 [ 60.768856] kmem_cache_alloc+0x16b/0x370 [ 60.769187] vm_area_dup+0x20/0x160 [ 60.769486] __split_vma+0x170/0x950 [ 60.769788] split_vma+0xc6/0x110 [ 60.770079] mprotect_fixup+0x8d2/0xb30 [ 60.770411] do_mprotect_pkey+0x87e/0xd40 [ 60.770813] __x64_sys_mprotect+0x78/0xc0 [ 60.771149] do_syscall_64+0x3f/0x90 [ 60.771463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.771883] [ 60.772040] Freed by task 203: [ 60.772345] kasan_save_stack+0x22/0x50 [ 60.772707] kasan_set_track+0x25/0x30 [ 60.773019] kasan_save_free_info+0x2b/0x50 [ 60.773373] __kasan_slab_free+0x10a/0x190 [ 60.773710] kmem_cache_free+0x10d/0x4d0 [ 60.774041] rcu_core+0x8c8/0x2860 [ 60.774327] __do_softirq+0x1b7/0x7d4 [ 60.774643] [ 60.774817] Last potentially related work creation: [ 60.775198] kasan_save_stack+0x22/0x50 [ 60.775525] __kasan_record_aux_stack+0x8e/0xa0 [ 60.775888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.776297] remove_vma+0x139/0x170 [ 60.776576] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.776937] do_vmi_munmap+0x1f1/0x2b0 [ 60.777266] __vm_munmap+0x138/0x3a0 [ 60.777568] __x64_sys_munmap+0x59/0x80 [ 60.777925] do_syscall_64+0x3f/0x90 [ 60.778258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.778685] [ 60.778859] Second to last potentially related work creation: [ 60.779299] kasan_save_stack+0x22/0x50 [ 60.779624] __kasan_record_aux_stack+0x8e/0xa0 [ 60.779991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.780404] remove_vma+0x139/0x170 [ 60.780693] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.781064] do_vmi_munmap+0x1f1/0x2b0 [ 60.781390] mmap_region+0x1f9/0x2660 [ 60.781714] do_mmap+0x854/0xf00 [ 60.781995] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.782320] ksys_mmap_pgoff+0x3af/0x500 [ 60.782645] do_syscall_64+0x3f/0x90 [ 60.783077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.783544] [ 60.783690] The buggy address belongs to the object at ffff88800f69d658 [ 60.783690] which belongs to the cache vm_area_struct of size 168 [ 60.784693] The buggy address is located 88 bytes inside of [ 60.784693] freed 168-byte region [ffff88800f69d658, ffff88800f69d700) [ 60.785609] [ 60.785751] The buggy address belongs to the physical page: [ 60.786220] page:000000006ac51d7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf69d [ 60.786988] memcg:ffff88800c6a1801 [ 60.787257] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.787668] page_type: 0xffffffff() [ 60.787951] raw: 0100000000000200 ffff8880087a0c80 ffffea00003da6c0 0000000000000006 [ 60.788552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6a1801 [ 60.789134] page dumped because: kasan: bad access detected [ 60.789548] [ 60.789682] Memory state around the buggy address: [ 60.790097] ffff88800f69d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.790791] ffff88800f69d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.791526] >ffff88800f69d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.792240] ^ [ 60.792655] ffff88800f69d700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 60.793264] ffff88800f69d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.793831] ================================================================== [ 60.794591] Disabling lock debugging due to kernel taint [ 62.615483] BUG: Bad rss-counter state mm:0000000022d67653 type:MM_FILEPAGES val:33 [ 62.616178] BUG: Bad rss-counter state mm:0000000022d67653 type:MM_ANONPAGES val:22 [ 62.981994] BUG: Bad rss-counter state mm:000000004d966d56 type:MM_FILEPAGES val:33 [ 62.983357] BUG: Bad rss-counter state mm:000000004d966d56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6401' (ECDSA) to the list of known hosts. 2023/06/21 09:54:20 fuzzer started 2023/06/21 09:54:20 dialing manager at localhost:36067 2023/06/21 09:54:20 checking machine... 2023/06/21 09:54:20 checking revisions... [ 63.606548] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:54:20 testing simple program... [ 63.648984] cgroup: Unknown subsys name 'net' [ 63.695025] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:54:20 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=00007fe3b704e390 CR3=000000000d982000 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=c8a931f4fed064bf84434a610aa07aea XMM02=000000000011a5e0eff9b2d0a8fce9cb XMM03=000000000011a6b02c67c8bc2e329bc3 XMM04=1a1a1d12f85c47a000000000000ae988 XMM05=4b4f69619636fd1e0000000000133000 XMM06=ae9b264101391a5b00000000001321a0 XMM07=e042d86d42eb936e0000000000121640 XMM08=174fe49e757ae526000000000011a6b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000a RCX=ffffffff8449cc1f RDX=ffff888009829b40 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff88800eb3f120 R8 =0000000000000000 R9 =000000000000000a R10=000000000000000a R11=000055827f91a000 R12=ffff88800ff5b280 R13=000000000000000a R14=000000000000000a R15=0000000000000048 RIP=ffffffff814c0860 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 00007fe1ff706900 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=00007fe1ff6e5020 CR3=000000000e466000 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