syzkaller login: [ 30.533212] BUG: Bad rss-counter state mm:000000006069d4b7 type:MM_FILEPAGES val:33 [ 30.533948] BUG: Bad rss-counter state mm:000000006069d4b7 type:MM_ANONPAGES val:22 [ 30.662713] ================================================================== [ 30.663417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.664090] Read of size 8 at addr ffff88800e021228 by task sshd/221 [ 30.664704] [ 30.664872] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.665431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.666095] Call Trace: [ 30.666313] [ 30.666511] dump_stack_lvl+0x91/0xf0 [ 30.667095] print_report+0xcc/0x620 [ 30.667432] ? __virt_addr_valid+0x102/0x340 [ 30.667825] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668316] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668738] kasan_report+0xbe/0xf0 [ 30.669132] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669555] vma_interval_tree_remove+0xc75/0xec0 [ 30.670007] vma_prepare+0xc54/0x11a0 [ 30.670349] __split_vma+0x5af/0x950 [ 30.670673] ? __pfx___split_vma+0x10/0x10 [ 30.671060] ? find_held_lock+0x2c/0x110 [ 30.671413] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.671792] ? lock_is_held_type+0x9f/0x120 [ 30.672167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.672617] ? mtree_range_walk+0x632/0x900 [ 30.673008] ? mas_walk+0x5c7/0x7c0 [ 30.673354] do_vmi_munmap+0x1f1/0x2b0 [ 30.673718] mmap_region+0x1f9/0x2660 [ 30.674078] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.674410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.674890] ? __pfx_lock_acquire+0x10/0x10 [ 30.675259] ? __pfx_mmap_region+0x10/0x10 [ 30.675632] ? security_mmap_addr+0x7d/0xa0 [ 30.676045] ? get_unmapped_area+0x1f5/0x3f0 [ 30.676522] do_mmap+0x854/0xf00 [ 30.676850] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.677209] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.677595] ksys_mmap_pgoff+0x3af/0x500 [ 30.677974] do_syscall_64+0x3f/0x90 [ 30.678327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678774] RIP: 0033:0x7fec4f54cd82 [ 30.679116] 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 [ 30.680658] RSP: 002b:00007ffd73707058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.681253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec4f54cd82 [ 30.681803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec4e986000 [ 30.682359] RBP: 00007fec4e986000 R08: 0000000000000009 R09: 0000000000001000 [ 30.682949] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aed2fddec0 [ 30.683517] R13: 00007ffd73707070 R14: 00007ffd737070a0 R15: 00007ffd73707400 [ 30.684103] [ 30.684337] [ 30.684476] Allocated by task 214: [ 30.684757] kasan_save_stack+0x22/0x50 [ 30.685104] kasan_set_track+0x25/0x30 [ 30.685433] __kasan_slab_alloc+0x59/0x70 [ 30.685780] kmem_cache_alloc+0x16b/0x370 [ 30.686135] vm_area_dup+0x20/0x160 [ 30.686445] __split_vma+0x170/0x950 [ 30.686745] split_vma+0xc6/0x110 [ 30.687041] mprotect_fixup+0x8d2/0xb30 [ 30.687370] do_mprotect_pkey+0x87e/0xd40 [ 30.687712] __x64_sys_mprotect+0x78/0xc0 [ 30.688053] do_syscall_64+0x3f/0x90 [ 30.688410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688826] [ 30.688973] Freed by task 19: [ 30.689235] kasan_save_stack+0x22/0x50 [ 30.689583] kasan_set_track+0x25/0x30 [ 30.689928] kasan_save_free_info+0x2b/0x50 [ 30.690293] __kasan_slab_free+0x10a/0x190 [ 30.690652] kmem_cache_free+0x10d/0x4d0 [ 30.690990] rcu_core+0x8c8/0x2860 [ 30.691288] __do_softirq+0x1b7/0x7d4 [ 30.691615] [ 30.691764] Last potentially related work creation: [ 30.692181] kasan_save_stack+0x22/0x50 [ 30.692568] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692962] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.693389] remove_vma+0x139/0x170 [ 30.693697] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.694079] do_vmi_munmap+0x1f1/0x2b0 [ 30.694411] __vm_munmap+0x138/0x3a0 [ 30.694732] __x64_sys_munmap+0x59/0x80 [ 30.695103] do_syscall_64+0x3f/0x90 [ 30.695437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695879] [ 30.696063] The buggy address belongs to the object at ffff88800e0211d0 [ 30.696063] which belongs to the cache vm_area_struct of size 168 [ 30.697161] The buggy address is located 88 bytes inside of [ 30.697161] freed 168-byte region [ffff88800e0211d0, ffff88800e021278) [ 30.698158] [ 30.698305] The buggy address belongs to the physical page: [ 30.698757] page:000000005917a2fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe021 [ 30.699522] memcg:ffff88800f140e01 [ 30.699813] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.700294] page_type: 0xffffffff() [ 30.700606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.701277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f140e01 [ 30.701894] page dumped because: kasan: bad access detected [ 30.702340] [ 30.702487] Memory state around the buggy address: [ 30.702879] ffff88800e021100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.703470] ffff88800e021180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.704054] >ffff88800e021200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.704671] ^ [ 30.705070] ffff88800e021280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.705653] ffff88800e021300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.706241] ================================================================== [ 30.706976] Disabling lock debugging due to kernel taint [ 32.670004] BUG: Bad rss-counter state mm:00000000c2a65c72 type:MM_FILEPAGES val:33 [ 32.670712] BUG: Bad rss-counter state mm:00000000c2a65c72 type:MM_ANONPAGES val:22 [ 33.039176] BUG: Bad rss-counter state mm:000000003477c30c type:MM_FILEPAGES val:33 [ 33.039891] BUG: Bad rss-counter state mm:000000003477c30c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48564' (ECDSA) to the list of known hosts. 2023/06/21 09:47:56 fuzzer started 2023/06/21 09:47:56 dialing manager at localhost:36067 2023/06/21 09:47:56 checking machine... 2023/06/21 09:47:56 checking revisions... [ 33.602608] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:47:56 testing simple program... [ 33.640355] cgroup: Unknown subsys name 'net' [ 33.691111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:56 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=00007ffec0523c18 CR3=000000000d3d2000 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=2036353a37343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888016b6f328 RCX=0000000000000001 RDX=ffff888016b6f298 RSI=ffff888016b6f260 RDI=ffff888016b6f2a0 RBP=dffffc0000000000 RSP=ffff888016b6f228 R8 =0000000000000001 R9 =ffff888016b6f2d0 R10=0000000000038001 R11=0000000000006097 R12=ffffed1002d6de54 R13=ffffed1002d6de53 R14=ffff888016b6f260 R15=ffff888016b6f290 RIP=ffffffff81130935 RFL=00000282 [--S----] 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 00007f3b9a100900 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=00007f3b9a6b7618 CR3=000000000e0b8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000