syzkaller login: [ 50.361020] BUG: Bad rss-counter state mm:000000006e314b6e type:MM_FILEPAGES val:33 [ 50.362845] BUG: Bad rss-counter state mm:000000006e314b6e type:MM_ANONPAGES val:22 [ 50.535287] ================================================================== [ 50.536230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.537172] Read of size 8 at addr ffff88801a2d4c20 by task sshd/219 [ 50.538049] [ 50.538274] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.539152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.540152] Call Trace: [ 50.540483] [ 50.540769] dump_stack_lvl+0x91/0xf0 [ 50.541264] print_report+0xcc/0x620 [ 50.541747] ? __virt_addr_valid+0x102/0x340 [ 50.542304] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.542937] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.543581] kasan_report+0xbe/0xf0 [ 50.544075] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.544705] vma_interval_tree_remove+0xc75/0xec0 [ 50.545320] vma_prepare+0xc54/0x11a0 [ 50.545805] __split_vma+0x5af/0x950 [ 50.546282] ? __pfx___split_vma+0x10/0x10 [ 50.546817] ? find_held_lock+0x2c/0x110 [ 50.547343] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.547945] ? lock_is_held_type+0x9f/0x120 [ 50.548494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.549104] ? mtree_range_walk+0x632/0x900 [ 50.549658] ? mas_walk+0x5c7/0x7c0 [ 50.550140] do_vmi_munmap+0x1f1/0x2b0 [ 50.550647] mmap_region+0x1f9/0x2660 [ 50.551142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.551671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.552400] ? __pfx_lock_acquire+0x10/0x10 [ 50.552954] ? __pfx_mmap_region+0x10/0x10 [ 50.553514] ? security_mmap_addr+0x7d/0xa0 [ 50.554065] ? get_unmapped_area+0x1f5/0x3f0 [ 50.554635] do_mmap+0x854/0xf00 [ 50.555094] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.555637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.556230] ksys_mmap_pgoff+0x3af/0x500 [ 50.556772] do_syscall_64+0x3f/0x90 [ 50.557273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.557954] RIP: 0033:0x7fdfc9123d82 [ 50.558435] 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 [ 50.560697] RSP: 002b:00007ffc28ee8118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.561652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfc9123d82 [ 50.562546] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfc855d000 [ 50.563438] RBP: 00007fdfc855d000 R08: 0000000000000009 R09: 0000000000001000 [ 50.564343] R10: 0000000000000812 R11: 0000000000000206 R12: 000056070ac9eec0 [ 50.565234] R13: 00007ffc28ee8130 R14: 00007ffc28ee8160 R15: 00007ffc28ee84c0 [ 50.566142] [ 50.566444] [ 50.566671] Allocated by task 212: [ 50.567127] kasan_save_stack+0x22/0x50 [ 50.567657] kasan_set_track+0x25/0x30 [ 50.568184] __kasan_slab_alloc+0x59/0x70 [ 50.568733] kmem_cache_alloc+0x16b/0x370 [ 50.569275] vm_area_dup+0x20/0x160 [ 50.569748] __split_vma+0x170/0x950 [ 50.570235] split_vma+0xc6/0x110 [ 50.570691] mprotect_fixup+0x8d2/0xb30 [ 50.571212] do_mprotect_pkey+0x87e/0xd40 [ 50.571775] __x64_sys_mprotect+0x78/0xc0 [ 50.572333] do_syscall_64+0x3f/0x90 [ 50.572829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.573504] [ 50.573726] Freed by task 209: [ 50.574140] kasan_save_stack+0x22/0x50 [ 50.574669] kasan_set_track+0x25/0x30 [ 50.575194] kasan_save_free_info+0x2b/0x50 [ 50.575756] __kasan_slab_free+0x10a/0x190 [ 50.576305] kmem_cache_free+0x10d/0x4d0 [ 50.576846] rcu_core+0x8c8/0x2860 [ 50.577312] __do_softirq+0x1b7/0x7d4 [ 50.577808] [ 50.578038] Last potentially related work creation: [ 50.578650] kasan_save_stack+0x22/0x50 [ 50.579186] __kasan_record_aux_stack+0x8e/0xa0 [ 50.579797] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.580471] remove_vma+0x139/0x170 [ 50.580950] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.581532] do_vmi_munmap+0x1f1/0x2b0 [ 50.582038] __vm_munmap+0x138/0x3a0 [ 50.582527] __x64_sys_munmap+0x59/0x80 [ 50.583051] do_syscall_64+0x3f/0x90 [ 50.583559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.584246] [ 50.584474] The buggy address belongs to the object at ffff88801a2d4bc8 [ 50.584474] which belongs to the cache vm_area_struct of size 168 [ 50.586026] The buggy address is located 88 bytes inside of [ 50.586026] freed 168-byte region [ffff88801a2d4bc8, ffff88801a2d4c70) [ 50.587512] [ 50.587746] The buggy address belongs to the physical page: [ 50.588439] page:00000000c520214e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2d4 [ 50.589599] memcg:ffff888013f36001 [ 50.590047] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.590723] page_type: 0xffffffff() [ 50.591195] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.592168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f36001 [ 50.593124] page dumped because: kasan: bad access detected [ 50.593815] [ 50.594042] Memory state around the buggy address: [ 50.594652] ffff88801a2d4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.595583] ffff88801a2d4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 50.596477] >ffff88801a2d4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 50.597372] ^ [ 50.597921] ffff88801a2d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 50.598826] ffff88801a2d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 50.599739] ================================================================== [ 50.600816] Disabling lock debugging due to kernel taint [ 52.571945] BUG: Bad rss-counter state mm:000000004250dfc4 type:MM_FILEPAGES val:33 [ 52.572957] BUG: Bad rss-counter state mm:000000004250dfc4 type:MM_ANONPAGES val:22 [ 53.051191] BUG: Bad rss-counter state mm:00000000d9922da1 type:MM_FILEPAGES val:33 [ 53.052385] BUG: Bad rss-counter state mm:00000000d9922da1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14230' (ECDSA) to the list of known hosts. 2023/06/20 02:16:26 fuzzer started 2023/06/20 02:16:27 dialing manager at localhost:44161 2023/06/20 02:16:27 checking machine... 2023/06/20 02:16:27 checking revisions... [ 53.833195] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:16:27 testing simple program... [ 53.892638] cgroup: Unknown subsys name 'net' [ 53.974144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:07 Registers: info registers vcpu 0 RAX=ffff88801676f7d0 RBX=ffff888008c58000 RCX=ffffffff8126aa95 RDX=1ffff11002cedefa RSI=ffff88801676f7fc RDI=ffffffff85d3bed0 RBP=ffff888008c5803c RSP=ffff88801676f420 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888008c58000 R12=ffff888008deb180 R13=0000000000000000 R14=0000000000000000 R15=0000000000014826 RIP=ffffffff8126b337 RFL=00000046 [---Z-P-] 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 00007fc8eb19a900 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=00007fc8ea6ac010 CR3=000000000d800000 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=e5b817520a1779b5a8453bc31094681e XMM02=ec2efd57dc4c00df0000000000121a00 XMM03=9aa43f264618ed150000000000121ad0 XMM04=edbc3a1116b8afba00000000000ae988 XMM05=dfcdbad4f1609c370000000000134a78 XMM06=d2eacec52320615700000000001338e0 XMM07=e042d86d42eb936e0000000000125170 XMM08=9aa43f264618ed150000000000121ad0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f5c3e0680b0 CR3=000000000e338000 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=2036323a36313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000