syzkaller login: [ 31.126924] BUG: Bad rss-counter state mm:0000000047b6d3e0 type:MM_FILEPAGES val:33 [ 31.127964] BUG: Bad rss-counter state mm:0000000047b6d3e0 type:MM_ANONPAGES val:22 [ 31.296183] ================================================================== [ 31.297123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.298098] Read of size 8 at addr ffff88800fcd5968 by task sshd/220 [ 31.299001] [ 31.299230] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.300138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.301176] Call Trace: [ 31.301593] [ 31.301973] dump_stack_lvl+0x91/0xf0 [ 31.302626] print_report+0xcc/0x620 [ 31.303288] ? __virt_addr_valid+0x102/0x340 [ 31.304041] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304854] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305676] kasan_report+0xbe/0xf0 [ 31.306319] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307089] vma_interval_tree_remove+0xc75/0xec0 [ 31.307752] vma_prepare+0xc54/0x11a0 [ 31.308254] __split_vma+0x5af/0x950 [ 31.308759] ? __pfx___split_vma+0x10/0x10 [ 31.309318] ? find_held_lock+0x2c/0x110 [ 31.309889] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.310489] ? lock_is_held_type+0x9f/0x120 [ 31.311070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.311731] ? mtree_range_walk+0x632/0x900 [ 31.312314] ? mas_walk+0x5c7/0x7c0 [ 31.312823] do_vmi_munmap+0x1f1/0x2b0 [ 31.313346] mmap_region+0x1f9/0x2660 [ 31.313871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.314416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.315189] ? __pfx_lock_acquire+0x10/0x10 [ 31.315838] ? __pfx_mmap_region+0x10/0x10 [ 31.316535] ? security_mmap_addr+0x7d/0xa0 [ 31.317087] ? get_unmapped_area+0x1f5/0x3f0 [ 31.317664] do_mmap+0x854/0xf00 [ 31.318106] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.318621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.319216] ksys_mmap_pgoff+0x3af/0x500 [ 31.319769] do_syscall_64+0x3f/0x90 [ 31.320245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320920] RIP: 0033:0x7f792895fd82 [ 31.321380] 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 [ 31.323585] RSP: 002b:00007ffd0672d688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.324536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f792895fd82 [ 31.325416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7927d99000 [ 31.326273] RBP: 00007f7927d99000 R08: 0000000000000009 R09: 0000000000001000 [ 31.327141] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4ebbe0ec0 [ 31.328033] R13: 00007ffd0672d6a0 R14: 00007ffd0672d6d0 R15: 00007ffd0672da30 [ 31.328908] [ 31.329200] [ 31.329413] Allocated by task 213: [ 31.329856] kasan_save_stack+0x22/0x50 [ 31.330520] kasan_set_track+0x25/0x30 [ 31.331178] __kasan_slab_alloc+0x59/0x70 [ 31.331883] kmem_cache_alloc+0x16b/0x370 [ 31.332412] vm_area_dup+0x20/0x160 [ 31.332896] __split_vma+0x170/0x950 [ 31.333367] split_vma+0xc6/0x110 [ 31.333819] mprotect_fixup+0x8d2/0xb30 [ 31.334330] do_mprotect_pkey+0x87e/0xd40 [ 31.334861] __x64_sys_mprotect+0x78/0xc0 [ 31.335381] do_syscall_64+0x3f/0x90 [ 31.335908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336552] [ 31.336784] Freed by task 213: [ 31.337180] kasan_save_stack+0x22/0x50 [ 31.337698] kasan_set_track+0x25/0x30 [ 31.338197] kasan_save_free_info+0x2b/0x50 [ 31.338750] __kasan_slab_free+0x10a/0x190 [ 31.339287] kmem_cache_free+0x10d/0x4d0 [ 31.339843] rcu_core+0x8c8/0x2860 [ 31.340291] __do_softirq+0x1b7/0x7d4 [ 31.340788] [ 31.341003] Last potentially related work creation: [ 31.341587] kasan_save_stack+0x22/0x50 [ 31.342110] __kasan_record_aux_stack+0x8e/0xa0 [ 31.342709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.343347] remove_vma+0x139/0x170 [ 31.343848] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.344404] do_vmi_munmap+0x1f1/0x2b0 [ 31.344906] __vm_munmap+0x138/0x3a0 [ 31.345379] __x64_sys_munmap+0x59/0x80 [ 31.345891] do_syscall_64+0x3f/0x90 [ 31.346367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347028] [ 31.347246] The buggy address belongs to the object at ffff88800fcd5910 [ 31.347246] which belongs to the cache vm_area_struct of size 168 [ 31.348839] The buggy address is located 88 bytes inside of [ 31.348839] freed 168-byte region [ffff88800fcd5910, ffff88800fcd59b8) [ 31.350335] [ 31.350559] The buggy address belongs to the physical page: [ 31.351275] page:0000000066fbd091 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcd5 [ 31.352459] memcg:ffff88800fcd2101 [ 31.352929] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.353624] page_type: 0xffffffff() [ 31.354097] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.355082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcd2101 [ 31.356094] page dumped because: kasan: bad access detected [ 31.356813] [ 31.357042] Memory state around the buggy address: [ 31.357667] ffff88800fcd5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.358587] ffff88800fcd5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.359514] >ffff88800fcd5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.360445] ^ [ 31.361281] ffff88800fcd5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.362193] ffff88800fcd5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.363105] ================================================================== [ 31.364176] Disabling lock debugging due to kernel taint [ 33.294360] BUG: Bad rss-counter state mm:000000002bb91b37 type:MM_FILEPAGES val:33 [ 33.295617] BUG: Bad rss-counter state mm:000000002bb91b37 type:MM_ANONPAGES val:22 [ 33.744064] BUG: Bad rss-counter state mm:000000006df28aa9 type:MM_FILEPAGES val:33 [ 33.745461] BUG: Bad rss-counter state mm:000000006df28aa9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27719' (ECDSA) to the list of known hosts. 2023/06/20 07:53:05 fuzzer started 2023/06/20 07:53:05 dialing manager at localhost:44161 2023/06/20 07:53:05 checking machine... 2023/06/20 07:53:05 checking revisions... [ 34.486542] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:53:05 testing simple program... [ 34.542818] cgroup: Unknown subsys name 'net' [ 34.579895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81370a3a RCX=0000000000000001 RDX=1ffff11002cabf19 RSI=ffff88801655fbc8 RDI=ffffffff81370a3a RBP=ffffffff81370a3a RSP=ffff88801655f820 R8 =0000000000000001 R9 =ffff88801655f8b0 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000001 R13=0000000000000000 R14=ffff8880164051c0 R15=ffff888018aa3b18 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f1718985900 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=00007ffc872a2000 CR3=000000001015e000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f47148f0090 CR3=000000000eaaa000 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=2034303a33353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000