syzkaller login: [ 31.372858] BUG: Bad rss-counter state mm:00000000172f4af9 type:MM_FILEPAGES val:33 [ 31.374063] BUG: Bad rss-counter state mm:00000000172f4af9 type:MM_ANONPAGES val:22 [ 31.413559] ================================================================== [ 31.414475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.415448] Read of size 8 at addr ffff888016c2fed8 by task sshd/220 [ 31.416251] [ 31.416483] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.417477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.418462] Call Trace: [ 31.418785] [ 31.419085] dump_stack_lvl+0x91/0xf0 [ 31.419592] print_report+0xcc/0x620 [ 31.420090] ? __virt_addr_valid+0x102/0x340 [ 31.420661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421937] kasan_report+0xbe/0xf0 [ 31.422417] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.423057] vma_interval_tree_remove+0xc75/0xec0 [ 31.423663] vma_prepare+0xc54/0x11a0 [ 31.424153] __split_vma+0x5af/0x950 [ 31.424650] ? __pfx___split_vma+0x10/0x10 [ 31.425188] ? find_held_lock+0x2c/0x110 [ 31.425724] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.426303] ? lock_is_held_type+0x9f/0x120 [ 31.426858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.427490] ? mtree_range_walk+0x632/0x900 [ 31.428063] ? mas_walk+0x5c7/0x7c0 [ 31.428560] do_vmi_munmap+0x1f1/0x2b0 [ 31.429055] mmap_region+0x1f9/0x2660 [ 31.429542] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.430058] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.430775] ? __pfx_lock_acquire+0x10/0x10 [ 31.431314] ? __pfx_mmap_region+0x10/0x10 [ 31.431856] ? security_mmap_addr+0x7d/0xa0 [ 31.432389] ? get_unmapped_area+0x1f5/0x3f0 [ 31.432965] do_mmap+0x854/0xf00 [ 31.433426] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.433943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.434517] ksys_mmap_pgoff+0x3af/0x500 [ 31.435033] do_syscall_64+0x3f/0x90 [ 31.435518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436177] RIP: 0033:0x7ff3792b8d82 [ 31.436651] 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 [ 31.438809] RSP: 002b:00007ffe306ab768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.439730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3792b8d82 [ 31.440653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3786f2000 [ 31.441556] RBP: 00007ff3786f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.442462] R10: 0000000000000812 R11: 0000000000000206 R12: 000056365934dd90 [ 31.443363] R13: 00007ffe306ab780 R14: 00007ffe306ab7b0 R15: 00007ffe306abb10 [ 31.444270] [ 31.444593] [ 31.444818] Allocated by task 213: [ 31.445273] kasan_save_stack+0x22/0x50 [ 31.445817] kasan_set_track+0x25/0x30 [ 31.446345] __kasan_slab_alloc+0x59/0x70 [ 31.446897] kmem_cache_alloc+0x16b/0x370 [ 31.447437] vm_area_dup+0x20/0x160 [ 31.447920] __split_vma+0x170/0x950 [ 31.448428] split_vma+0xc6/0x110 [ 31.448898] mprotect_fixup+0x8d2/0xb30 [ 31.449433] do_mprotect_pkey+0x87e/0xd40 [ 31.449989] __x64_sys_mprotect+0x78/0xc0 [ 31.450548] do_syscall_64+0x3f/0x90 [ 31.451057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.451745] [ 31.451971] Freed by task 213: [ 31.452385] kasan_save_stack+0x22/0x50 [ 31.452947] kasan_set_track+0x25/0x30 [ 31.453470] kasan_save_free_info+0x2b/0x50 [ 31.454036] __kasan_slab_free+0x10a/0x190 [ 31.454607] kmem_cache_free+0x10d/0x4d0 [ 31.455149] rcu_core+0x8c8/0x2860 [ 31.455627] __do_softirq+0x1b7/0x7d4 [ 31.456140] [ 31.456368] Last potentially related work creation: [ 31.457015] kasan_save_stack+0x22/0x50 [ 31.457550] __kasan_record_aux_stack+0x8e/0xa0 [ 31.458169] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.458845] remove_vma+0x139/0x170 [ 31.459324] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.459921] do_vmi_munmap+0x1f1/0x2b0 [ 31.460454] __vm_munmap+0x138/0x3a0 [ 31.460950] __x64_sys_munmap+0x59/0x80 [ 31.461472] do_syscall_64+0x3f/0x90 [ 31.461986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.462667] [ 31.462893] The buggy address belongs to the object at ffff888016c2fe80 [ 31.462893] which belongs to the cache vm_area_struct of size 168 [ 31.464481] The buggy address is located 88 bytes inside of [ 31.464481] freed 168-byte region [ffff888016c2fe80, ffff888016c2ff28) [ 31.465989] [ 31.466215] The buggy address belongs to the physical page: [ 31.466906] page:000000001973452f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c2f [ 31.468067] memcg:ffff888019115701 [ 31.468522] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.469217] page_type: 0xffffffff() [ 31.469697] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.470677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019115701 [ 31.471653] page dumped because: kasan: bad access detected [ 31.472363] [ 31.472596] Memory state around the buggy address: [ 31.473216] ffff888016c2fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.474143] ffff888016c2fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.475073] >ffff888016c2fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.475980] ^ [ 31.476772] ffff888016c2ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.477678] ffff888016c2ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.478601] ================================================================== [ 31.479628] Disabling lock debugging due to kernel taint [ 33.518210] BUG: Bad rss-counter state mm:00000000652c25de type:MM_FILEPAGES val:33 [ 33.519508] BUG: Bad rss-counter state mm:00000000652c25de type:MM_ANONPAGES val:22 [ 33.861348] BUG: Bad rss-counter state mm:000000005b90ca57 type:MM_FILEPAGES val:33 [ 33.862466] BUG: Bad rss-counter state mm:000000005b90ca57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31923' (ECDSA) to the list of known hosts. 2023/06/20 13:16:47 fuzzer started 2023/06/20 13:16:47 dialing manager at localhost:36067 2023/06/20 13:16:47 checking machine... 2023/06/20 13:16:47 checking revisions... [ 34.540360] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:16:47 testing simple program... [ 34.583422] cgroup: Unknown subsys name 'net' [ 34.624836] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:16:47 Registers: info registers vcpu 0 RAX=1ffffffff0c09d7b RBX=ffffffff8604ebdc RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebc4 RSP=ffff88800689f0a0 R8 =ffffffff864b2008 R9 =ffff88800689f198 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebc4 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007ff94e1fb900 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=00007ffee5e90000 CR3=000000000f5a6000 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=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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f376b5cc0f0 CR3=000000000db88000 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=2037343a36313a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36313a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000