syzkaller login: [ 33.816194] BUG: Bad rss-counter state mm:000000005f89feb5 type:MM_FILEPAGES val:33 [ 33.817289] BUG: Bad rss-counter state mm:000000005f89feb5 type:MM_ANONPAGES val:22 [ 33.983287] ================================================================== [ 33.984373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.985504] Read of size 8 at addr ffff88800e191228 by task sshd/219 [ 33.986582] [ 33.986843] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.987868] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.989041] Call Trace: [ 33.989426] [ 33.989788] dump_stack_lvl+0x91/0xf0 [ 33.990371] print_report+0xcc/0x620 [ 33.990908] ? __virt_addr_valid+0x102/0x340 [ 33.991491] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.992160] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.992812] kasan_report+0xbe/0xf0 [ 33.993319] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.993989] vma_interval_tree_remove+0xc75/0xec0 [ 33.994638] vma_prepare+0xc54/0x11a0 [ 33.995150] __split_vma+0x5af/0x950 [ 33.995660] ? __pfx___split_vma+0x10/0x10 [ 33.996222] ? find_held_lock+0x2c/0x110 [ 33.996779] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.997382] ? lock_is_held_type+0x9f/0x120 [ 33.997974] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.998626] ? mtree_range_walk+0x632/0x900 [ 33.999226] ? mas_walk+0x5c7/0x7c0 [ 33.999733] do_vmi_munmap+0x1f1/0x2b0 [ 34.000257] mmap_region+0x1f9/0x2660 [ 34.000769] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.001318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.002099] ? __pfx_lock_acquire+0x10/0x10 [ 34.002670] ? __pfx_mmap_region+0x10/0x10 [ 34.003239] ? security_mmap_addr+0x7d/0xa0 [ 34.003809] ? get_unmapped_area+0x1f5/0x3f0 [ 34.004404] do_mmap+0x854/0xf00 [ 34.004875] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.005414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.006023] ksys_mmap_pgoff+0x3af/0x500 [ 34.006572] do_syscall_64+0x3f/0x90 [ 34.007090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.007784] RIP: 0033:0x7f258e1c3d82 [ 34.008275] 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 [ 34.010557] RSP: 002b:00007ffed897a3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.011545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f258e1c3d82 [ 34.012446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f258d5fd000 [ 34.013351] RBP: 00007f258d5fd000 R08: 0000000000000009 R09: 0000000000001000 [ 34.014262] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c50f741b20 [ 34.015153] R13: 00007ffed897a3f0 R14: 00007ffed897a420 R15: 00007ffed897a780 [ 34.016059] [ 34.016367] [ 34.016598] Allocated by task 212: [ 34.017056] kasan_save_stack+0x22/0x50 [ 34.017593] kasan_set_track+0x25/0x30 [ 34.018133] __kasan_slab_alloc+0x59/0x70 [ 34.018697] kmem_cache_alloc+0x16b/0x370 [ 34.019254] vm_area_dup+0x20/0x160 [ 34.019741] __split_vma+0x170/0x950 [ 34.020245] split_vma+0xc6/0x110 [ 34.020718] mprotect_fixup+0x8d2/0xb30 [ 34.021260] do_mprotect_pkey+0x87e/0xd40 [ 34.021827] __x64_sys_mprotect+0x78/0xc0 [ 34.022391] do_syscall_64+0x3f/0x90 [ 34.022898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.023590] [ 34.023821] Freed by task 19: [ 34.024237] kasan_save_stack+0x22/0x50 [ 34.024770] kasan_set_track+0x25/0x30 [ 34.025301] kasan_save_free_info+0x2b/0x50 [ 34.025888] __kasan_slab_free+0x10a/0x190 [ 34.026455] kmem_cache_free+0x10d/0x4d0 [ 34.026997] rcu_core+0x8c8/0x2860 [ 34.027554] __do_softirq+0x1b7/0x7d4 [ 34.028073] [ 34.028300] Last potentially related work creation: [ 34.028928] kasan_save_stack+0x22/0x50 [ 34.029469] __kasan_record_aux_stack+0x8e/0xa0 [ 34.030085] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.030779] remove_vma+0x139/0x170 [ 34.031264] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.031863] do_vmi_munmap+0x1f1/0x2b0 [ 34.032379] __vm_munmap+0x138/0x3a0 [ 34.032877] __x64_sys_munmap+0x59/0x80 [ 34.033417] do_syscall_64+0x3f/0x90 [ 34.033950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.034643] [ 34.034873] The buggy address belongs to the object at ffff88800e1911d0 [ 34.034873] which belongs to the cache vm_area_struct of size 168 [ 34.036440] The buggy address is located 88 bytes inside of [ 34.036440] freed 168-byte region [ffff88800e1911d0, ffff88800e191278) [ 34.037953] [ 34.038183] The buggy address belongs to the physical page: [ 34.038892] page:00000000b560db14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe191 [ 34.040052] memcg:ffff888014491b01 [ 34.040500] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.041196] page_type: 0xffffffff() [ 34.041693] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.042679] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014491b01 [ 34.043667] page dumped because: kasan: bad access detected [ 34.044399] [ 34.044637] Memory state around the buggy address: [ 34.045272] ffff88800e191100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.046227] ffff88800e191180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.047168] >ffff88800e191200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.048090] ^ [ 34.048698] ffff88800e191280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.049625] ffff88800e191300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.050605] ================================================================== [ 34.051687] Disabling lock debugging due to kernel taint [ 36.018170] BUG: Bad rss-counter state mm:00000000e38f1860 type:MM_FILEPAGES val:33 [ 36.019530] BUG: Bad rss-counter state mm:00000000e38f1860 type:MM_ANONPAGES val:22 [ 36.436189] BUG: Bad rss-counter state mm:000000000f456c66 type:MM_FILEPAGES val:33 [ 36.437177] BUG: Bad rss-counter state mm:000000000f456c66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6105' (ECDSA) to the list of known hosts. 2023/06/20 02:10:25 fuzzer started 2023/06/20 02:10:25 dialing manager at localhost:44161 2023/06/20 02:10:25 checking machine... 2023/06/20 02:10:25 checking revisions... [ 37.247022] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:10:25 testing simple program... [ 37.299332] cgroup: Unknown subsys name 'net' [ 37.348168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:10:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801c804b00 RCX=ffffffff81141c07 RDX=ffff888016449b40 RSI=0000000000000000 RDI=0000000000000006 RBP=8000000018593067 RSP=ffff88801029fb60 R8 =0000000000000006 R9 =8000000018593067 R10=8000000018593065 R11=0000000000000000 R12=1ffff11002053f6d R13=8000000018593065 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff814c01fc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6cf580c900 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=00007f6cf6360044 CR3=0000000019b0c000 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=f8274571eb7b96083d7a8cc84df211ee XMM05=00000000000000000000000000000000 XMM06=73274563637573083d6572204d73113d 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=00007f7475cbfc98 CR3=0000000009b32000 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=cf3c40bdf62d1f971b420ecaa1646141 XMM02=2c67c8bc2e329bc3000000000011e8d0 XMM03=fb795ef6d65770560000000000125198 XMM04=cfe0f2ad02bc01f800000000000ae988 XMM05=dfcdbad4f1609c370000000000134d28 XMM06=cb1e9229393611280000000000133b90 XMM07=e042d86d42eb936e0000000000125418 XMM08=8a751ccc0e3cfea8000000000011e930 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000