syzkaller login: [ 30.766647] BUG: Bad rss-counter state mm:000000005fef61ae type:MM_FILEPAGES val:33 [ 30.768082] BUG: Bad rss-counter state mm:000000005fef61ae type:MM_ANONPAGES val:22 [ 30.898048] ================================================================== [ 30.898921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.899805] Read of size 8 at addr ffff888016a21310 by task sshd/220 [ 30.900526] [ 30.900843] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.901903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.903141] Call Trace: [ 30.903542] [ 30.903893] dump_stack_lvl+0x91/0xf0 [ 30.904494] print_report+0xcc/0x620 [ 30.905081] ? __virt_addr_valid+0x102/0x340 [ 30.905768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.906515] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.907276] kasan_report+0xbe/0xf0 [ 30.907859] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908618] vma_interval_tree_remove+0xc75/0xec0 [ 30.909361] vma_prepare+0xc54/0x11a0 [ 30.909941] __split_vma+0x5af/0x950 [ 30.910509] ? __pfx___split_vma+0x10/0x10 [ 30.911147] ? find_held_lock+0x2c/0x110 [ 30.911783] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.912476] ? lock_is_held_type+0x9f/0x120 [ 30.913155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.913896] ? mtree_range_walk+0x632/0x900 [ 30.914568] ? mas_walk+0x5c7/0x7c0 [ 30.915146] do_vmi_munmap+0x1f1/0x2b0 [ 30.915742] mmap_region+0x1f9/0x2660 [ 30.916330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.916943] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.917835] ? __pfx_lock_acquire+0x10/0x10 [ 30.918479] ? __pfx_mmap_region+0x10/0x10 [ 30.919124] ? security_mmap_addr+0x7d/0xa0 [ 30.919771] ? get_unmapped_area+0x1f5/0x3f0 [ 30.920433] do_mmap+0x854/0xf00 [ 30.920963] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.921555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.922166] ksys_mmap_pgoff+0x3af/0x500 [ 30.922777] do_syscall_64+0x3f/0x90 [ 30.923353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.924140] RIP: 0033:0x7f404fdb2d82 [ 30.924665] 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 [ 30.927336] RSP: 002b:00007fff1151db28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.928461] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f404fdb2d82 [ 30.929550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f404f1ec000 [ 30.930602] RBP: 00007f404f1ec000 R08: 0000000000000009 R09: 0000000000001000 [ 30.931661] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbf7232d90 [ 30.932722] R13: 00007fff1151db40 R14: 00007fff1151db70 R15: 00007fff1151ded0 [ 30.933798] [ 30.934154] [ 30.934424] Allocated by task 213: [ 30.934951] kasan_save_stack+0x22/0x50 [ 30.935570] kasan_set_track+0x25/0x30 [ 30.936164] __kasan_slab_alloc+0x59/0x70 [ 30.936798] kmem_cache_alloc+0x16b/0x370 [ 30.937449] vm_area_dup+0x20/0x160 [ 30.938009] __split_vma+0x170/0x950 [ 30.938577] split_vma+0xc6/0x110 [ 30.939116] mprotect_fixup+0x8d2/0xb30 [ 30.939727] do_mprotect_pkey+0x87e/0xd40 [ 30.940358] __x64_sys_mprotect+0x78/0xc0 [ 30.940989] do_syscall_64+0x3f/0x90 [ 30.941580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942362] [ 30.942624] Freed by task 203: [ 30.943106] kasan_save_stack+0x22/0x50 [ 30.943716] kasan_set_track+0x25/0x30 [ 30.944321] kasan_save_free_info+0x2b/0x50 [ 30.944963] __kasan_slab_free+0x10a/0x190 [ 30.945638] kmem_cache_free+0x10d/0x4d0 [ 30.946256] rcu_core+0x8c8/0x2860 [ 30.946798] __do_softirq+0x1b7/0x7d4 [ 30.947378] [ 30.947633] Last potentially related work creation: [ 30.948353] kasan_save_stack+0x22/0x50 [ 30.948958] __kasan_record_aux_stack+0x8e/0xa0 [ 30.949668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.950431] remove_vma+0x139/0x170 [ 30.950980] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.951659] do_vmi_munmap+0x1f1/0x2b0 [ 30.952256] __vm_munmap+0x138/0x3a0 [ 30.952821] __x64_sys_munmap+0x59/0x80 [ 30.953428] do_syscall_64+0x3f/0x90 [ 30.954007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954798] [ 30.955058] The buggy address belongs to the object at ffff888016a212b8 [ 30.955058] which belongs to the cache vm_area_struct of size 168 [ 30.956855] The buggy address is located 88 bytes inside of [ 30.956855] freed 168-byte region [ffff888016a212b8, ffff888016a21360) [ 30.958614] [ 30.958877] The buggy address belongs to the physical page: [ 30.959692] page:00000000a58dc0bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a21 [ 30.961032] memcg:ffff888019fd2301 [ 30.961466] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.962083] page_type: 0xffffffff() [ 30.962507] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.963373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fd2301 [ 30.964224] page dumped because: kasan: bad access detected [ 30.964845] [ 30.965049] Memory state around the buggy address: [ 30.965620] ffff888016a21200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.966419] ffff888016a21280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.967230] >ffff888016a21300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.968031] ^ [ 30.968466] ffff888016a21380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.969282] ffff888016a21400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.970086] ================================================================== [ 30.971257] Disabling lock debugging due to kernel taint [ 33.617253] BUG: Bad rss-counter state mm:000000005c31d881 type:MM_FILEPAGES val:33 [ 33.618445] BUG: Bad rss-counter state mm:000000005c31d881 type:MM_ANONPAGES val:22 [ 34.180544] BUG: Bad rss-counter state mm:000000008cb0a2c9 type:MM_FILEPAGES val:33 [ 34.181709] BUG: Bad rss-counter state mm:000000008cb0a2c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20430' (ECDSA) to the list of known hosts. 2023/06/20 21:56:42 fuzzer started 2023/06/20 21:56:42 dialing manager at localhost:36067 2023/06/20 21:56:42 checking machine... 2023/06/20 21:56:42 checking revisions... [ 34.818106] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:56:42 testing simple program... [ 34.859364] cgroup: Unknown subsys name 'net' [ 34.913893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:56:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f2a15ded9a0 CR3=000000000d868000 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=4d726a318cc504a3374691b00e156460 XMM02=000000000011a1a8ec2efd57dc4c00df XMM03=0000000000121a503dfd3706c2d079dc XMM04=73656edb1e76005400000000000ae988 XMM05=cbd928af625b44530000000000132700 XMM06=4fda316b135da52b00000000001317a0 XMM07=e042d86d42eb936e0000000000121cd0 XMM08=3dfd3706c2d079dc000000000011a208 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f0a51c0 RBX=ffff8880103275e0 RCX=ffffffff81132ffe RDX=ffff8880103274f8 RSI=0000000000000000 RDI=ffff8880103275b8 RBP=ffff88800f0a51c0 RSP=ffff8880103274f8 R8 =0000000000004000 R9 =0000000000000000 R10=ffff888010327548 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888010327570 R14=ffff888010327590 R15=ffff888010327548 RIP=ffffffff81133010 RFL=00000246 [---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 00007f67a7a30900 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=00007ffcb4d37000 CR3=0000000015cba000 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=563412feff00545000000000000080fe 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