syzkaller login: [ 31.114217] BUG: Bad rss-counter state mm:00000000b3cf9e27 type:MM_FILEPAGES val:33 [ 31.116200] BUG: Bad rss-counter state mm:00000000b3cf9e27 type:MM_ANONPAGES val:22 [ 31.280670] ================================================================== [ 31.281579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.282512] Read of size 8 at addr ffff888019b1edf0 by task sshd/221 [ 31.283427] [ 31.283655] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.284526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.285526] Call Trace: [ 31.285848] [ 31.286130] dump_stack_lvl+0x91/0xf0 [ 31.286628] print_report+0xcc/0x620 [ 31.287109] ? __virt_addr_valid+0x102/0x340 [ 31.287689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288320] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288943] kasan_report+0xbe/0xf0 [ 31.289424] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290044] vma_interval_tree_remove+0xc75/0xec0 [ 31.290649] vma_prepare+0xc54/0x11a0 [ 31.291132] __split_vma+0x5af/0x950 [ 31.291606] ? __pfx___split_vma+0x10/0x10 [ 31.292149] ? find_held_lock+0x2c/0x110 [ 31.292675] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.293244] ? lock_is_held_type+0x9f/0x120 [ 31.293786] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.294400] ? mtree_range_walk+0x632/0x900 [ 31.294951] ? mas_walk+0x5c7/0x7c0 [ 31.295425] do_vmi_munmap+0x1f1/0x2b0 [ 31.295924] mmap_region+0x1f9/0x2660 [ 31.296412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.296924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.297647] ? __pfx_lock_acquire+0x10/0x10 [ 31.298187] ? __pfx_mmap_region+0x10/0x10 [ 31.298729] ? security_mmap_addr+0x7d/0xa0 [ 31.299259] ? get_unmapped_area+0x1f5/0x3f0 [ 31.299835] do_mmap+0x854/0xf00 [ 31.300274] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.301331] ksys_mmap_pgoff+0x3af/0x500 [ 31.301840] do_syscall_64+0x3f/0x90 [ 31.302311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302958] RIP: 0033:0x7f2d29ddfd82 [ 31.303413] 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 [ 31.305523] RSP: 002b:00007ffd536893f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.306419] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d29ddfd82 [ 31.307261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d29219000 [ 31.308125] RBP: 00007f2d29219000 R08: 0000000000000009 R09: 0000000000001000 [ 31.308964] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d466f58980 [ 31.309809] R13: 00007ffd53689410 R14: 00007ffd53689440 R15: 00007ffd536897a0 [ 31.310657] [ 31.310947] [ 31.311162] Allocated by task 214: [ 31.311590] kasan_save_stack+0x22/0x50 [ 31.312104] kasan_set_track+0x25/0x30 [ 31.312600] __kasan_slab_alloc+0x59/0x70 [ 31.313122] kmem_cache_alloc+0x16b/0x370 [ 31.313632] vm_area_dup+0x20/0x160 [ 31.314089] __split_vma+0x170/0x950 [ 31.314549] split_vma+0xc6/0x110 [ 31.314988] mprotect_fixup+0x8d2/0xb30 [ 31.315496] do_mprotect_pkey+0x87e/0xd40 [ 31.316029] __x64_sys_mprotect+0x78/0xc0 [ 31.316552] do_syscall_64+0x3f/0x90 [ 31.317027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317670] [ 31.317884] Freed by task 214: [ 31.318271] kasan_save_stack+0x22/0x50 [ 31.318775] kasan_set_track+0x25/0x30 [ 31.319266] kasan_save_free_info+0x2b/0x50 [ 31.319819] __kasan_slab_free+0x10a/0x190 [ 31.320350] kmem_cache_free+0x10d/0x4d0 [ 31.320852] rcu_core+0x8c8/0x2860 [ 31.321294] __do_softirq+0x1b7/0x7d4 [ 31.321762] [ 31.321975] Last potentially related work creation: [ 31.322557] kasan_save_stack+0x22/0x50 [ 31.323057] __kasan_record_aux_stack+0x8e/0xa0 [ 31.323624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324276] remove_vma+0x139/0x170 [ 31.324771] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325322] do_vmi_munmap+0x1f1/0x2b0 [ 31.325807] __vm_munmap+0x138/0x3a0 [ 31.326272] __x64_sys_munmap+0x59/0x80 [ 31.326766] do_syscall_64+0x3f/0x90 [ 31.327241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327908] [ 31.328124] The buggy address belongs to the object at ffff888019b1ed98 [ 31.328124] which belongs to the cache vm_area_struct of size 168 [ 31.329580] The buggy address is located 88 bytes inside of [ 31.329580] freed 168-byte region [ffff888019b1ed98, ffff888019b1ee40) [ 31.330974] [ 31.331188] The buggy address belongs to the physical page: [ 31.331846] page:0000000098b70347 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b1e [ 31.332927] memcg:ffff88800e127201 [ 31.333346] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.333980] page_type: 0xffffffff() [ 31.334427] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.335332] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e127201 [ 31.336245] page dumped because: kasan: bad access detected [ 31.336905] [ 31.337119] Memory state around the buggy address: [ 31.337694] ffff888019b1ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.338541] ffff888019b1ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.339395] >ffff888019b1ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.340280] ^ [ 31.341109] ffff888019b1ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.341965] ffff888019b1ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.342826] ================================================================== [ 31.343765] Disabling lock debugging due to kernel taint [ 34.078234] BUG: Bad rss-counter state mm:00000000983a8ed5 type:MM_FILEPAGES val:33 [ 34.079387] BUG: Bad rss-counter state mm:00000000983a8ed5 type:MM_ANONPAGES val:22 [ 34.464531] BUG: Bad rss-counter state mm:000000000af03cda type:MM_FILEPAGES val:33 [ 34.465909] BUG: Bad rss-counter state mm:000000000af03cda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14635' (ECDSA) to the list of known hosts. 2023/06/19 14:39:40 fuzzer started 2023/06/19 14:39:41 dialing manager at localhost:44161 2023/06/19 14:39:41 checking machine... 2023/06/19 14:39:41 checking revisions... [ 35.184828] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:39:41 testing simple program... [ 35.239427] cgroup: Unknown subsys name 'net' [ 35.287468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:39:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc74a31678 CR3=0000000018b56000 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=2030343a39333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8364053d RBX=ffffffff85fa3dec RCX=ffffffff83640763 RDX=0000000000000000 RSI=ffffffff863b22f0 RDI=ffffffff85fa3dec RBP=ffffffff85fa3df0 RSP=ffff88800f20f5e0 R8 =ffffffff863b22f0 R9 =ffff88800f20f6d8 R10=0000000000038001 R11=000000000008aa86 R12=ffffffff85fa3dec R13=ffffffff85fa3dec R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcab RFL=00000256 [---ZAP-] 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 00007f82a2ab7900 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=00007ffc5bfc1000 CR3=000000000eb08000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000