syzkaller login: [ 30.925458] BUG: Bad rss-counter state mm:0000000086d606b0 type:MM_FILEPAGES val:33 [ 30.926630] BUG: Bad rss-counter state mm:0000000086d606b0 type:MM_ANONPAGES val:22 [ 30.966571] ================================================================== [ 30.967598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.968760] Read of size 8 at addr ffff88800fa8dd08 by task sshd/219 [ 30.969603] [ 30.969910] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.970826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.971933] Call Trace: [ 30.972303] [ 30.972598] dump_stack_lvl+0x91/0xf0 [ 30.973064] print_report+0xcc/0x620 [ 30.973535] ? __virt_addr_valid+0x102/0x340 [ 30.974073] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.974692] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.975333] kasan_report+0xbe/0xf0 [ 30.975810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.976455] vma_interval_tree_remove+0xc75/0xec0 [ 30.977091] vma_prepare+0xc54/0x11a0 [ 30.977609] __split_vma+0x5af/0x950 [ 30.978105] ? __pfx___split_vma+0x10/0x10 [ 30.978653] ? find_held_lock+0x2c/0x110 [ 30.979183] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.979779] ? lock_is_held_type+0x9f/0x120 [ 30.980349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.980981] ? mtree_range_walk+0x632/0x900 [ 30.981576] ? mas_walk+0x5c7/0x7c0 [ 30.982065] do_vmi_munmap+0x1f1/0x2b0 [ 30.982578] mmap_region+0x1f9/0x2660 [ 30.983073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.983619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.984379] ? __pfx_lock_acquire+0x10/0x10 [ 30.984914] ? __pfx_mmap_region+0x10/0x10 [ 30.985460] ? security_mmap_addr+0x7d/0xa0 [ 30.985998] ? get_unmapped_area+0x1f5/0x3f0 [ 30.986555] do_mmap+0x854/0xf00 [ 30.987008] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.987532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.988109] ksys_mmap_pgoff+0x3af/0x500 [ 30.988620] do_syscall_64+0x3f/0x90 [ 30.989096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989763] RIP: 0033:0x7fd611ff5d82 [ 30.990235] 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 [ 30.992380] RSP: 002b:00007ffc390c6268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.993317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd611ff5d82 [ 30.994168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd61142f000 [ 30.995032] RBP: 00007fd61142f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.995882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0303e9ec0 [ 30.996730] R13: 00007ffc390c6280 R14: 00007ffc390c62b0 R15: 00007ffc390c6610 [ 30.997605] [ 30.997905] [ 30.998119] Allocated by task 212: [ 30.998548] kasan_save_stack+0x22/0x50 [ 30.999053] kasan_set_track+0x25/0x30 [ 30.999560] __kasan_slab_alloc+0x59/0x70 [ 31.000083] kmem_cache_alloc+0x16b/0x370 [ 31.000597] vm_area_dup+0x20/0x160 [ 31.001058] __split_vma+0x170/0x950 [ 31.001538] split_vma+0xc6/0x110 [ 31.001982] mprotect_fixup+0x8d2/0xb30 [ 31.002491] do_mprotect_pkey+0x87e/0xd40 [ 31.003010] __x64_sys_mprotect+0x78/0xc0 [ 31.003544] do_syscall_64+0x3f/0x90 [ 31.004016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.004655] [ 31.004870] Freed by task 212: [ 31.005283] kasan_save_stack+0x22/0x50 [ 31.005796] kasan_set_track+0x25/0x30 [ 31.006288] kasan_save_free_info+0x2b/0x50 [ 31.006821] __kasan_slab_free+0x10a/0x190 [ 31.007354] kmem_cache_free+0x10d/0x4d0 [ 31.007865] rcu_core+0x8c8/0x2860 [ 31.008315] __do_softirq+0x1b7/0x7d4 [ 31.008793] [ 31.009012] Last potentially related work creation: [ 31.009621] kasan_save_stack+0x22/0x50 [ 31.010130] __kasan_record_aux_stack+0x8e/0xa0 [ 31.010712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.011370] remove_vma+0x139/0x170 [ 31.011882] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.012440] do_vmi_munmap+0x1f1/0x2b0 [ 31.012926] __vm_munmap+0x138/0x3a0 [ 31.013425] __x64_sys_munmap+0x59/0x80 [ 31.013921] do_syscall_64+0x3f/0x90 [ 31.014402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.015043] [ 31.015259] The buggy address belongs to the object at ffff88800fa8dcb0 [ 31.015259] which belongs to the cache vm_area_struct of size 168 [ 31.016734] The buggy address is located 88 bytes inside of [ 31.016734] freed 168-byte region [ffff88800fa8dcb0, ffff88800fa8dd58) [ 31.018149] [ 31.018368] The buggy address belongs to the physical page: [ 31.019035] page:00000000f83b6697 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfa8d [ 31.020125] memcg:ffff88800ee9da01 [ 31.020555] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.021214] page_type: 0xffffffff() [ 31.021678] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.022603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9da01 [ 31.023509] page dumped because: kasan: bad access detected [ 31.024171] [ 31.024389] Memory state around the buggy address: [ 31.024974] ffff88800fa8dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.025851] ffff88800fa8dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.026707] >ffff88800fa8dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.027563] ^ [ 31.028011] ffff88800fa8dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.028872] ffff88800fa8de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.029738] ================================================================== [ 31.030687] Disabling lock debugging due to kernel taint [ 32.964138] BUG: Bad rss-counter state mm:000000001583cbc5 type:MM_FILEPAGES val:33 [ 32.965311] BUG: Bad rss-counter state mm:000000001583cbc5 type:MM_ANONPAGES val:22 [ 33.425233] BUG: Bad rss-counter state mm:000000003ad1ca0f type:MM_FILEPAGES val:33 [ 33.427084] BUG: Bad rss-counter state mm:000000003ad1ca0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45057' (ECDSA) to the list of known hosts. 2023/06/20 07:23:37 fuzzer started 2023/06/20 07:23:37 dialing manager at localhost:44161 2023/06/20 07:23:37 checking machine... 2023/06/20 07:23:37 checking revisions... [ 34.142767] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:23:37 testing simple program... [ 34.201954] cgroup: Unknown subsys name 'net' [ 34.244354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:23:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f6b76242dad RCX=0000000000000000 RDX=ffff888015a03680 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f6b76242dad RSP=ffff88800eb07490 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f6b76242000 R11=00000000000b6996 R12=ffff88800eb075b0 R13=0000000000000000 R14=ffff888015a03680 R15=1ffff11001d60f1d RIP=ffffffff811fc714 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 00007f6b75c00700 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=00007f078c63e0b0 CR3=000000000f6fe000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732036333a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c58400 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=00007f44d7012070 CR3=000000000ca82000 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=1733c27a3845d4ae7740d2033f3671fb XMM02=000000000011fef0eff9b2d0a8fce9cb XMM03=000000000011ffc02c67c8bc2e329bc3 XMM04=6c497f1c0020d98700000000000ae988 XMM05=dfcdbad4f1609c370000000000134280 XMM06=12c52d08dcabb10e00000000001330e8 XMM07=e042d86d42eb936e0000000000124980 XMM08=805c7c887bee7ddc000000000011ffc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000