syzkaller login: [ 54.773996] BUG: Bad rss-counter state mm:00000000304af3b5 type:MM_FILEPAGES val:33 [ 54.776226] BUG: Bad rss-counter state mm:00000000304af3b5 type:MM_ANONPAGES val:22 [ 54.941437] ================================================================== [ 54.942476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.943557] Read of size 8 at addr ffff888019988140 by task sshd/219 [ 54.944544] [ 54.944783] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.945695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.946722] Call Trace: [ 54.947059] [ 54.947394] dump_stack_lvl+0x91/0xf0 [ 54.947923] print_report+0xcc/0x620 [ 54.948440] ? __virt_addr_valid+0x102/0x340 [ 54.949029] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.949689] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.950344] kasan_report+0xbe/0xf0 [ 54.950858] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.951674] vma_interval_tree_remove+0xc75/0xec0 [ 54.952430] vma_prepare+0xc54/0x11a0 [ 54.953030] __split_vma+0x5af/0x950 [ 54.953605] ? __pfx___split_vma+0x10/0x10 [ 54.954254] ? find_held_lock+0x2c/0x110 [ 54.954879] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.955597] ? lock_is_held_type+0x9f/0x120 [ 54.956254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.956966] ? mtree_range_walk+0x632/0x900 [ 54.957626] ? mas_walk+0x5c7/0x7c0 [ 54.958206] do_vmi_munmap+0x1f1/0x2b0 [ 54.958810] mmap_region+0x1f9/0x2660 [ 54.959406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.960040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.960907] ? __pfx_lock_acquire+0x10/0x10 [ 54.961554] ? __pfx_mmap_region+0x10/0x10 [ 54.962199] ? security_mmap_addr+0x7d/0xa0 [ 54.962845] ? get_unmapped_area+0x1f5/0x3f0 [ 54.963523] do_mmap+0x854/0xf00 [ 54.964058] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.964661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.965353] ksys_mmap_pgoff+0x3af/0x500 [ 54.965971] do_syscall_64+0x3f/0x90 [ 54.966552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.967369] RIP: 0033:0x7efccdf7cd82 [ 54.967937] 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 [ 54.970173] RSP: 002b:00007fffc1802638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.971077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efccdf7cd82 [ 54.971939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efccd3b6000 [ 54.972799] RBP: 00007efccd3b6000 R08: 0000000000000009 R09: 0000000000001000 [ 54.973654] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626d6297ec0 [ 54.974501] R13: 00007fffc1802650 R14: 00007fffc1802680 R15: 00007fffc18029e0 [ 54.975380] [ 54.975680] [ 54.975898] Allocated by task 212: [ 54.976337] kasan_save_stack+0x22/0x50 [ 54.976849] kasan_set_track+0x25/0x30 [ 54.977345] __kasan_slab_alloc+0x59/0x70 [ 54.977871] kmem_cache_alloc+0x16b/0x370 [ 54.978390] vm_area_dup+0x20/0x160 [ 54.978848] __split_vma+0x170/0x950 [ 54.979314] split_vma+0xc6/0x110 [ 54.979760] mprotect_fixup+0x8d2/0xb30 [ 54.980265] do_mprotect_pkey+0x87e/0xd40 [ 54.980792] __x64_sys_mprotect+0x78/0xc0 [ 54.981317] do_syscall_64+0x3f/0x90 [ 54.981787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.982425] [ 54.982642] Freed by task 212: [ 54.983033] kasan_save_stack+0x22/0x50 [ 54.983550] kasan_set_track+0x25/0x30 [ 54.984051] kasan_save_free_info+0x2b/0x50 [ 54.984582] __kasan_slab_free+0x10a/0x190 [ 54.985111] kmem_cache_free+0x10d/0x4d0 [ 54.985623] rcu_core+0x8c8/0x2860 [ 54.986071] __do_softirq+0x1b7/0x7d4 [ 54.986551] [ 54.986770] Last potentially related work creation: [ 54.987375] kasan_save_stack+0x22/0x50 [ 54.987875] __kasan_record_aux_stack+0x8e/0xa0 [ 54.988451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.989091] remove_vma+0x139/0x170 [ 54.989547] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.990104] do_vmi_munmap+0x1f1/0x2b0 [ 54.990605] __vm_munmap+0x138/0x3a0 [ 54.991080] __x64_sys_munmap+0x59/0x80 [ 54.991589] do_syscall_64+0x3f/0x90 [ 54.992063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.992706] [ 54.992923] The buggy address belongs to the object at ffff8880199880e8 [ 54.992923] which belongs to the cache vm_area_struct of size 168 [ 54.994402] The buggy address is located 88 bytes inside of [ 54.994402] freed 168-byte region [ffff8880199880e8, ffff888019988190) [ 54.995816] [ 54.996040] The buggy address belongs to the physical page: [ 54.996699] page:000000007ce6f7f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19988 [ 54.997794] memcg:ffff88800d80fa01 [ 54.998226] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 54.998921] page_type: 0xffffffff() [ 54.999389] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3700 dead000000000003 [ 55.000305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d80fa01 [ 55.001222] page dumped because: kasan: bad access detected [ 55.001883] [ 55.002099] Memory state around the buggy address: [ 55.002682] ffff888019988000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.003554] ffff888019988080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 55.004414] >ffff888019988100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.005269] ^ [ 55.005900] ffff888019988180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 55.006761] ffff888019988200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 55.007622] ================================================================== [ 55.008688] Disabling lock debugging due to kernel taint [ 57.036759] BUG: Bad rss-counter state mm:000000009bd59f04 type:MM_FILEPAGES val:33 [ 57.037972] BUG: Bad rss-counter state mm:000000009bd59f04 type:MM_ANONPAGES val:22 [ 57.419620] BUG: Bad rss-counter state mm:0000000009301cb3 type:MM_FILEPAGES val:33 [ 57.420744] BUG: Bad rss-counter state mm:0000000009301cb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1952' (ECDSA) to the list of known hosts. 2023/06/20 07:41:17 fuzzer started 2023/06/20 07:41:17 dialing manager at localhost:44161 2023/06/20 07:41:17 checking machine... 2023/06/20 07:41:17 checking revisions... [ 58.153378] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:41:18 testing simple program... [ 58.205803] cgroup: Unknown subsys name 'net' [ 58.248640] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:53 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff8880159dd1c0 RSI=ffffffff83ab3fa9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880102c7500 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000c5 R11=0000137a0000137a R12=0000000000000000 R13=00000000000000c5 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007f6c5ff84900 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=00007f6c6053b618 CR3=000000000dd46000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f86343e3330 CR3=0000000010188000 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=681fcbf3baff2687224546f8f2c441e2 XMM02=000000000011c1f8eff9b2d0a8fce9cb XMM03=000000000011c2c82c67c8bc2e329bc3 XMM04=134bbc6719cc692800000000000ae988 XMM05=be7850b5c449c2f20000000000133c10 XMM06=806171799158d9670000000000133608 XMM07=e042d86d42eb936e0000000000123e30 XMM08=da66866d31f2115a000000000011c2c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000