syzkaller login: [ 33.642335] BUG: Bad rss-counter state mm:000000000b4e73e3 type:MM_FILEPAGES val:33 [ 33.643525] BUG: Bad rss-counter state mm:000000000b4e73e3 type:MM_ANONPAGES val:22 [ 33.682837] ================================================================== [ 33.683874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.685105] Read of size 8 at addr ffff88800f1e45c8 by task sshd/220 [ 33.685975] [ 33.686251] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.687340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.688422] Call Trace: [ 33.688806] [ 33.689197] dump_stack_lvl+0x91/0xf0 [ 33.689837] print_report+0xcc/0x620 [ 33.690339] ? __virt_addr_valid+0x102/0x340 [ 33.690900] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.691531] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.692188] kasan_report+0xbe/0xf0 [ 33.692669] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.693292] vma_interval_tree_remove+0xc75/0xec0 [ 33.693896] vma_prepare+0xc54/0x11a0 [ 33.694375] __split_vma+0x5af/0x950 [ 33.694848] ? __pfx___split_vma+0x10/0x10 [ 33.695380] ? mark_held_locks+0x9e/0xe0 [ 33.695887] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 33.696654] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 33.697502] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.698209] ? lock_is_held_type+0x9f/0x120 [ 33.698877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.699624] ? mtree_range_walk+0x632/0x900 [ 33.700350] ? mas_walk+0x5c7/0x7c0 [ 33.700836] do_vmi_munmap+0x1f1/0x2b0 [ 33.701340] mmap_region+0x1f9/0x2660 [ 33.701829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.702346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.703062] ? __pfx_lock_acquire+0x10/0x10 [ 33.703594] ? __pfx_mmap_region+0x10/0x10 [ 33.704157] ? security_mmap_addr+0x7d/0xa0 [ 33.704698] ? get_unmapped_area+0x1f5/0x3f0 [ 33.705255] do_mmap+0x854/0xf00 [ 33.705697] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.706198] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.706759] ksys_mmap_pgoff+0x3af/0x500 [ 33.707266] do_syscall_64+0x3f/0x90 [ 33.707749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.708420] RIP: 0033:0x7fb173e2cd82 [ 33.708882] 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 [ 33.711005] RSP: 002b:00007ffca610dff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.711924] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb173e2cd82 [ 33.712825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb173266000 [ 33.713676] RBP: 00007fb173266000 R08: 0000000000000009 R09: 0000000000001000 [ 33.714539] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594b224aec0 [ 33.715392] R13: 00007ffca610e010 R14: 00007ffca610e040 R15: 00007ffca610e3a0 [ 33.716283] [ 33.716579] [ 33.716799] Allocated by task 212: [ 33.717247] kasan_save_stack+0x22/0x50 [ 33.717761] kasan_set_track+0x25/0x30 [ 33.718267] __kasan_slab_alloc+0x59/0x70 [ 33.718801] kmem_cache_alloc+0x16b/0x370 [ 33.719334] vm_area_dup+0x20/0x160 [ 33.719801] __split_vma+0x170/0x950 [ 33.720304] split_vma+0xc6/0x110 [ 33.720755] mprotect_fixup+0x8d2/0xb30 [ 33.721276] do_mprotect_pkey+0x87e/0xd40 [ 33.721813] __x64_sys_mprotect+0x78/0xc0 [ 33.722347] do_syscall_64+0x3f/0x90 [ 33.722823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.723482] [ 33.723696] Freed by task 212: [ 33.724145] kasan_save_stack+0x22/0x50 [ 33.724659] kasan_set_track+0x25/0x30 [ 33.725162] kasan_save_free_info+0x2b/0x50 [ 33.725707] __kasan_slab_free+0x10a/0x190 [ 33.726249] kmem_cache_free+0x10d/0x4d0 [ 33.726767] rcu_core+0x8c8/0x2860 [ 33.727236] __do_softirq+0x1b7/0x7d4 [ 33.727721] [ 33.727937] Last potentially related work creation: [ 33.728643] kasan_save_stack+0x22/0x50 [ 33.729158] __kasan_record_aux_stack+0x8e/0xa0 [ 33.729740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.730388] remove_vma+0x139/0x170 [ 33.730847] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.731409] do_vmi_munmap+0x1f1/0x2b0 [ 33.731903] __vm_munmap+0x138/0x3a0 [ 33.732403] __x64_sys_munmap+0x59/0x80 [ 33.732904] do_syscall_64+0x3f/0x90 [ 33.733387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.734041] [ 33.734261] The buggy address belongs to the object at ffff88800f1e4570 [ 33.734261] which belongs to the cache vm_area_struct of size 168 [ 33.735747] The buggy address is located 88 bytes inside of [ 33.735747] freed 168-byte region [ffff88800f1e4570, ffff88800f1e4618) [ 33.737191] [ 33.737412] The buggy address belongs to the physical page: [ 33.738071] page:00000000c8dec7ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1e4 [ 33.739171] memcg:ffff888016edb501 [ 33.739599] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.740295] page_type: 0xffffffff() [ 33.740754] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.741680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016edb501 [ 33.742630] page dumped because: kasan: bad access detected [ 33.743303] [ 33.743527] Memory state around the buggy address: [ 33.744142] ffff88800f1e4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.745002] ffff88800f1e4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.745861] >ffff88800f1e4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.746715] ^ [ 33.747388] ffff88800f1e4600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.748294] ffff88800f1e4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.749158] ================================================================== [ 33.750194] Disabling lock debugging due to kernel taint [ 35.395811] BUG: Bad rss-counter state mm:000000002105f5c8 type:MM_FILEPAGES val:33 [ 35.397087] BUG: Bad rss-counter state mm:000000002105f5c8 type:MM_ANONPAGES val:22 [ 35.874650] BUG: Bad rss-counter state mm:00000000338e787d type:MM_FILEPAGES val:33 [ 35.875642] BUG: Bad rss-counter state mm:00000000338e787d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23179' (ECDSA) to the list of known hosts. 2023/06/19 21:48:37 fuzzer started 2023/06/19 21:48:37 dialing manager at localhost:44161 2023/06/19 21:48:37 checking machine... 2023/06/19 21:48:37 checking revisions... [ 36.672491] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:48:37 testing simple program... [ 36.709460] cgroup: Unknown subsys name 'net' [ 36.750441] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:32 Registers: info registers vcpu 0 RAX=ffff88800f0c4d98 RBX=ffff888016547e20 RCX=0000000000000000 RDX=ffff8880166b51c0 RSI=ffffffff8449f362 RDI=ffff888016547e30 RBP=ffff8880169d2e1c RSP=ffff888016547d90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880169d2e00 R13=ffffed1002ca8fcb R14=ffff8880169d2e1c R15=ffff888016547e59 RIP=ffffffff8449f9d3 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc5b3d8a900 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=00007fc5b4341618 CR3=000000000ebca000 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=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 info registers vcpu 1 RAX=000000007ab44853 RBX=00000000b2c8eaf3 RCX=ffff88806cf09b4c RDX=0000000000000008 RSI=0000000000000007 RDI=00000000d83cfd8d RBP=0000000000000000 RSP=ffff88806cf09ac0 R8 =000000008180b155 R9 =ffff88806cf09a30 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09b28 R15=0000000000000008 RIP=ffffffff82270e91 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 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=00007fc5b43420b0 CR3=000000000ebca000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000