syzkaller login: [ 59.433101] BUG: Bad rss-counter state mm:0000000016f529ed type:MM_FILEPAGES val:33 [ 59.434979] BUG: Bad rss-counter state mm:0000000016f529ed type:MM_ANONPAGES val:22 [ 59.608934] ================================================================== [ 59.609918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.610952] Read of size 8 at addr ffff888017da3228 by task sshd/220 [ 59.611935] [ 59.612186] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.613327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.614423] Call Trace: [ 59.614778] [ 59.615090] dump_stack_lvl+0x91/0xf0 [ 59.615650] print_report+0xcc/0x620 [ 59.616186] ? __virt_addr_valid+0x102/0x340 [ 59.616796] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.617486] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.618161] kasan_report+0xbe/0xf0 [ 59.618696] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.619418] vma_interval_tree_remove+0xc75/0xec0 [ 59.620108] vma_prepare+0xc54/0x11a0 [ 59.620657] __split_vma+0x5af/0x950 [ 59.621200] ? __pfx___split_vma+0x10/0x10 [ 59.621803] ? find_held_lock+0x2c/0x110 [ 59.622406] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.623052] ? lock_is_held_type+0x9f/0x120 [ 59.623686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.624381] ? mtree_range_walk+0x632/0x900 [ 59.625010] ? mas_walk+0x5c7/0x7c0 [ 59.625553] do_vmi_munmap+0x1f1/0x2b0 [ 59.626123] mmap_region+0x1f9/0x2660 [ 59.626674] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.627274] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.628085] ? __pfx_lock_acquire+0x10/0x10 [ 59.628695] ? __pfx_mmap_region+0x10/0x10 [ 59.629303] ? security_mmap_addr+0x7d/0xa0 [ 59.629901] ? get_unmapped_area+0x1f5/0x3f0 [ 59.630521] do_mmap+0x854/0xf00 [ 59.631027] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.631612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.632249] ksys_mmap_pgoff+0x3af/0x500 [ 59.632822] do_syscall_64+0x3f/0x90 [ 59.633360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.634091] RIP: 0033:0x7fbdc42a8d82 [ 59.634610] 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 [ 59.637021] RSP: 002b:00007ffc9bba5f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.638048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbdc42a8d82 [ 59.639007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbdc36e2000 [ 59.639980] RBP: 00007fbdc36e2000 R08: 0000000000000009 R09: 0000000000001000 [ 59.640932] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f711c95ec0 [ 59.641889] R13: 00007ffc9bba5f50 R14: 00007ffc9bba5f80 R15: 00007ffc9bba62e0 [ 59.642853] [ 59.643198] [ 59.643439] Allocated by task 213: [ 59.643915] kasan_save_stack+0x22/0x50 [ 59.644482] kasan_set_track+0x25/0x30 [ 59.645033] __kasan_slab_alloc+0x59/0x70 [ 59.645622] kmem_cache_alloc+0x16b/0x370 [ 59.646201] vm_area_dup+0x20/0x160 [ 59.646711] __split_vma+0x170/0x950 [ 59.647242] split_vma+0xc6/0x110 [ 59.647731] mprotect_fixup+0x8d2/0xb30 [ 59.648293] do_mprotect_pkey+0x87e/0xd40 [ 59.648879] __x64_sys_mprotect+0x78/0xc0 [ 59.649458] do_syscall_64+0x3f/0x90 [ 59.649990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.650706] [ 59.650949] Freed by task 213: [ 59.651405] kasan_save_stack+0x22/0x50 [ 59.651970] kasan_set_track+0x25/0x30 [ 59.652525] kasan_save_free_info+0x2b/0x50 [ 59.653121] __kasan_slab_free+0x10a/0x190 [ 59.653723] kmem_cache_free+0x10d/0x4d0 [ 59.654291] rcu_core+0x8c8/0x2860 [ 59.654789] __do_softirq+0x1b7/0x7d4 [ 59.655326] [ 59.655564] Last potentially related work creation: [ 59.656218] kasan_save_stack+0x22/0x50 [ 59.656783] __kasan_record_aux_stack+0x8e/0xa0 [ 59.657421] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.658140] remove_vma+0x139/0x170 [ 59.658643] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.659275] do_vmi_munmap+0x1f1/0x2b0 [ 59.659819] __vm_munmap+0x138/0x3a0 [ 59.660339] __x64_sys_munmap+0x59/0x80 [ 59.660892] do_syscall_64+0x3f/0x90 [ 59.661421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.662131] [ 59.662376] The buggy address belongs to the object at ffff888017da31d0 [ 59.662376] which belongs to the cache vm_area_struct of size 168 [ 59.664031] The buggy address is located 88 bytes inside of [ 59.664031] freed 168-byte region [ffff888017da31d0, ffff888017da3278) [ 59.665607] [ 59.665845] The buggy address belongs to the physical page: [ 59.666576] page:00000000f23bf6ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17da3 [ 59.667792] memcg:ffff88801933f101 [ 59.668266] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.668983] page_type: 0xffffffff() [ 59.669482] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.670504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801933f101 [ 59.671528] page dumped because: kasan: bad access detected [ 59.672263] [ 59.672500] Memory state around the buggy address: [ 59.673139] ffff888017da3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.674086] ffff888017da3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 59.675038] >ffff888017da3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 59.675981] ^ [ 59.676598] ffff888017da3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 59.677550] ffff888017da3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 59.678498] ================================================================== [ 59.679580] Disabling lock debugging due to kernel taint [ 61.627922] BUG: Bad rss-counter state mm:00000000a80b71ee type:MM_FILEPAGES val:33 [ 61.628774] BUG: Bad rss-counter state mm:00000000a80b71ee type:MM_ANONPAGES val:22 [ 62.110248] BUG: Bad rss-counter state mm:0000000001de4837 type:MM_FILEPAGES val:33 [ 62.111329] BUG: Bad rss-counter state mm:0000000001de4837 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59806' (ECDSA) to the list of known hosts. 2023/06/19 22:16:21 fuzzer started 2023/06/19 22:16:22 dialing manager at localhost:44161 2023/06/19 22:16:22 checking machine... 2023/06/19 22:16:22 checking revisions... [ 62.817483] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:16:22 testing simple program... [ 62.865497] cgroup: Unknown subsys name 'net' [ 62.917582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:15:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171ad12 RDX=ffff88801456d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888009497bc8 RSP=ffff88801682fe70 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000020 R11=0000000000000000 R12=0000000000100073 R13=00007ff96f926044 R14=ffff888009497bd8 R15=0000000000000020 RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 00007ff96edd2900 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=00007ff96f926044 CR3=000000000eade000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007f6aea6b4000 CR3=000000000d922000 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=cfa0267ea710b6a8e449f866481d4378 XMM02=ec2efd57dc4c00df0000000000125bf0 XMM03=53617e6b4374bedc0000000000125cc0 XMM04=88b4667a186d9cdf00000000000ae988 XMM05=19e9129bd510f235000000000013ca58 XMM06=0f3e3dd466401fb5000000000013b8c0 XMM07=e042d86d42eb936e000000000012d2e0 XMM08=53617e6b4374bedc0000000000125cc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000