syzkaller login: [ 50.162975] BUG: Bad rss-counter state mm:00000000e87f8c93 type:MM_FILEPAGES val:33 [ 50.163542] BUG: Bad rss-counter state mm:00000000e87f8c93 type:MM_ANONPAGES val:22 [ 50.272659] ================================================================== [ 50.273351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.274062] Read of size 8 at addr ffff88800eaf7228 by task sshd/221 [ 50.274658] [ 50.274826] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.275485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.276243] Call Trace: [ 50.276554] [ 50.276776] dump_stack_lvl+0x91/0xf0 [ 50.277154] print_report+0xcc/0x620 [ 50.277527] ? __virt_addr_valid+0x102/0x340 [ 50.277952] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.278451] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.278819] kasan_report+0xbe/0xf0 [ 50.279082] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.279426] vma_interval_tree_remove+0xc75/0xec0 [ 50.279764] vma_prepare+0xc54/0x11a0 [ 50.280030] __split_vma+0x5af/0x950 [ 50.280291] ? __pfx___split_vma+0x10/0x10 [ 50.280583] ? find_held_lock+0x2c/0x110 [ 50.280878] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.281188] ? lock_is_held_type+0x9f/0x120 [ 50.281486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.281822] ? mtree_range_walk+0x632/0x900 [ 50.282123] ? mas_walk+0x5c7/0x7c0 [ 50.282393] do_vmi_munmap+0x1f1/0x2b0 [ 50.282675] mmap_region+0x1f9/0x2660 [ 50.282961] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.283258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.283682] ? __pfx_lock_acquire+0x10/0x10 [ 50.283996] ? __pfx_mmap_region+0x10/0x10 [ 50.284314] ? security_mmap_addr+0x7d/0xa0 [ 50.284623] ? get_unmapped_area+0x1f5/0x3f0 [ 50.284948] do_mmap+0x854/0xf00 [ 50.285205] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.285486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.285816] ksys_mmap_pgoff+0x3af/0x500 [ 50.286115] do_syscall_64+0x3f/0x90 [ 50.286400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.286794] RIP: 0033:0x7f380bd74d82 [ 50.287076] 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 [ 50.288354] RSP: 002b:00007ffd4d6082a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.288893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f380bd74d82 [ 50.289394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f380b1ae000 [ 50.289896] RBP: 00007f380b1ae000 R08: 0000000000000009 R09: 0000000000001000 [ 50.290401] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e60206b20 [ 50.290916] R13: 00007ffd4d6082c0 R14: 00007ffd4d6082f0 R15: 00007ffd4d608650 [ 50.291418] [ 50.291593] [ 50.291719] Allocated by task 214: [ 50.291981] kasan_save_stack+0x22/0x50 [ 50.292269] kasan_set_track+0x25/0x30 [ 50.292562] __kasan_slab_alloc+0x59/0x70 [ 50.292872] kmem_cache_alloc+0x16b/0x370 [ 50.293178] vm_area_dup+0x20/0x160 [ 50.293459] __split_vma+0x170/0x950 [ 50.293738] split_vma+0xc6/0x110 [ 50.293999] mprotect_fixup+0x8d2/0xb30 [ 50.294301] do_mprotect_pkey+0x87e/0xd40 [ 50.294612] __x64_sys_mprotect+0x78/0xc0 [ 50.294925] do_syscall_64+0x3f/0x90 [ 50.295205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.295589] [ 50.295717] Freed by task 214: [ 50.295953] kasan_save_stack+0x22/0x50 [ 50.296253] kasan_set_track+0x25/0x30 [ 50.296539] kasan_save_free_info+0x2b/0x50 [ 50.296861] __kasan_slab_free+0x10a/0x190 [ 50.297180] kmem_cache_free+0x10d/0x4d0 [ 50.297487] rcu_core+0x8c8/0x2860 [ 50.297745] __do_softirq+0x1b7/0x7d4 [ 50.298018] [ 50.298139] Last potentially related work creation: [ 50.298500] kasan_save_stack+0x22/0x50 [ 50.298791] __kasan_record_aux_stack+0x8e/0xa0 [ 50.299126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.299491] remove_vma+0x139/0x170 [ 50.299760] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.300081] do_vmi_munmap+0x1f1/0x2b0 [ 50.300360] __vm_munmap+0x138/0x3a0 [ 50.300633] __x64_sys_munmap+0x59/0x80 [ 50.300926] do_syscall_64+0x3f/0x90 [ 50.301203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.301580] [ 50.301707] Second to last potentially related work creation: [ 50.302110] kasan_save_stack+0x22/0x50 [ 50.302403] __kasan_record_aux_stack+0x8e/0xa0 [ 50.302733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.303100] remove_vma+0x139/0x170 [ 50.303366] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.303695] do_vmi_munmap+0x1f1/0x2b0 [ 50.303980] mmap_region+0x1f9/0x2660 [ 50.304261] do_mmap+0x854/0xf00 [ 50.304515] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.304806] ksys_mmap_pgoff+0x7d/0x500 [ 50.305093] do_syscall_64+0x3f/0x90 [ 50.305363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.305740] [ 50.305865] The buggy address belongs to the object at ffff88800eaf71d0 [ 50.305865] which belongs to the cache vm_area_struct of size 168 [ 50.306728] The buggy address is located 88 bytes inside of [ 50.306728] freed 168-byte region [ffff88800eaf71d0, ffff88800eaf7278) [ 50.307567] [ 50.307694] The buggy address belongs to the physical page: [ 50.308083] page:0000000043c5a76a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaf7 [ 50.308727] memcg:ffff88800ebd7c01 [ 50.308976] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.309357] page_type: 0xffffffff() [ 50.309626] raw: 0100000000000200 ffff88800879fc80 ffffea000037a100 dead000000000008 [ 50.310181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebd7c01 [ 50.310729] page dumped because: kasan: bad access detected [ 50.311117] [ 50.311243] Memory state around the buggy address: [ 50.311584] ffff88800eaf7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.312083] ffff88800eaf7180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 50.312590] >ffff88800eaf7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 50.313089] ^ [ 50.313419] ffff88800eaf7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 50.313925] ffff88800eaf7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 50.314430] ================================================================== [ 50.315090] Disabling lock debugging due to kernel taint [ 52.223186] BUG: Bad rss-counter state mm:000000006e52309f type:MM_FILEPAGES val:33 [ 52.224731] BUG: Bad rss-counter state mm:000000006e52309f type:MM_ANONPAGES val:22 [ 52.699739] BUG: Bad rss-counter state mm:000000001f98b98a type:MM_FILEPAGES val:33 [ 52.701012] BUG: Bad rss-counter state mm:000000001f98b98a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40996' (ECDSA) to the list of known hosts. 2023/06/19 20:42:25 fuzzer started 2023/06/19 20:42:25 dialing manager at localhost:44161 2023/06/19 20:42:25 checking machine... 2023/06/19 20:42:25 checking revisions... [ 53.395594] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:42:26 testing simple program... [ 53.440970] cgroup: Unknown subsys name 'net' [ 53.476329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:42:05 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=00007fffe1af4ff8 CR3=000000000e886000 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=2035323a32343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016167438 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83638916 RDI=ffff888016167444 RBP=0000000000000009 RSP=ffff888016167350 R8 =0000000000000001 R9 =ffff8880161673b0 R10=0000000000038001 R11=000000000008a842 R12=ffff888016167438 R13=0000000000000000 R14=ffff88800ff7b680 R15=0000000000002000 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007fb7b7067900 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=00007fb7b761e618 CR3=000000000d83e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000