syzkaller login: [ 34.671092] BUG: Bad rss-counter state mm:000000004f2cd6ae type:MM_FILEPAGES val:33 [ 34.672294] BUG: Bad rss-counter state mm:000000004f2cd6ae type:MM_ANONPAGES val:22 [ 34.720122] ================================================================== [ 34.721160] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.722134] Read of size 8 at addr ffff88800e4d44e0 by task sshd/219 [ 34.722938] [ 34.723189] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.724160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.725258] Call Trace: [ 34.725615] [ 34.725926] dump_stack_lvl+0x91/0xf0 [ 34.726467] print_report+0xcc/0x620 [ 34.727004] ? __virt_addr_valid+0x102/0x340 [ 34.727615] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.728302] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.728982] kasan_report+0xbe/0xf0 [ 34.729497] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.730196] vma_interval_tree_remove+0xc75/0xec0 [ 34.730858] vma_prepare+0xc54/0x11a0 [ 34.731387] __split_vma+0x5af/0x950 [ 34.731925] ? __pfx___split_vma+0x10/0x10 [ 34.732512] ? find_held_lock+0x2c/0x110 [ 34.733090] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.733718] ? lock_is_held_type+0x9f/0x120 [ 34.734323] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.735011] ? mtree_range_walk+0x632/0x900 [ 34.735632] ? mas_walk+0x5c7/0x7c0 [ 34.736165] do_vmi_munmap+0x1f1/0x2b0 [ 34.736710] mmap_region+0x1f9/0x2660 [ 34.737248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.737820] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.738628] ? __pfx_lock_acquire+0x10/0x10 [ 34.739224] ? __pfx_mmap_region+0x10/0x10 [ 34.739812] ? security_mmap_addr+0x7d/0xa0 [ 34.740406] ? get_unmapped_area+0x1f5/0x3f0 [ 34.741022] do_mmap+0x854/0xf00 [ 34.741506] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.742058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.742685] ksys_mmap_pgoff+0x3af/0x500 [ 34.743272] do_syscall_64+0x3f/0x90 [ 34.743810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.744527] RIP: 0033:0x7fd3bc865d82 [ 34.745029] 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 [ 34.747425] RSP: 002b:00007fff0bbc4db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.748447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3bc865d82 [ 34.749408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3bbc9f000 [ 34.750359] RBP: 00007fd3bbc9f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.751329] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565398c0eec0 [ 34.752282] R13: 00007fff0bbc4dd0 R14: 00007fff0bbc4e00 R15: 00007fff0bbc5160 [ 34.753247] [ 34.753572] [ 34.753813] Allocated by task 212: [ 34.754292] kasan_save_stack+0x22/0x50 [ 34.754853] kasan_set_track+0x25/0x30 [ 34.755401] __kasan_slab_alloc+0x59/0x70 [ 34.755988] kmem_cache_alloc+0x16b/0x370 [ 34.756564] vm_area_dup+0x20/0x160 [ 34.757069] __split_vma+0x170/0x950 [ 34.757587] split_vma+0xc6/0x110 [ 34.758087] mprotect_fixup+0x8d2/0xb30 [ 34.758640] do_mprotect_pkey+0x87e/0xd40 [ 34.759240] __x64_sys_mprotect+0x78/0xc0 [ 34.759826] do_syscall_64+0x3f/0x90 [ 34.760358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.761062] [ 34.761301] Freed by task 212: [ 34.761735] kasan_save_stack+0x22/0x50 [ 34.762299] kasan_set_track+0x25/0x30 [ 34.762853] kasan_save_free_info+0x2b/0x50 [ 34.763444] __kasan_slab_free+0x10a/0x190 [ 34.764041] kmem_cache_free+0x10d/0x4d0 [ 34.764605] rcu_core+0x8c8/0x2860 [ 34.765104] __do_softirq+0x1b7/0x7d4 [ 34.765635] [ 34.765875] Last potentially related work creation: [ 34.766533] kasan_save_stack+0x22/0x50 [ 34.767109] __kasan_record_aux_stack+0x8e/0xa0 [ 34.767748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.768473] remove_vma+0x139/0x170 [ 34.768975] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.769595] do_vmi_munmap+0x1f1/0x2b0 [ 34.770148] __vm_munmap+0x138/0x3a0 [ 34.770667] __x64_sys_munmap+0x59/0x80 [ 34.771223] do_syscall_64+0x3f/0x90 [ 34.771750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.772454] [ 34.772690] Second to last potentially related work creation: [ 34.773462] kasan_save_stack+0x22/0x50 [ 34.774036] __kasan_record_aux_stack+0x8e/0xa0 [ 34.774677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.775384] remove_vma+0x139/0x170 [ 34.775887] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.776506] do_vmi_munmap+0x1f1/0x2b0 [ 34.777056] mmap_region+0x1f9/0x2660 [ 34.777585] do_mmap+0x854/0xf00 [ 34.778061] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.778611] ksys_mmap_pgoff+0x3af/0x500 [ 34.779188] do_syscall_64+0x3f/0x90 [ 34.779710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.780424] [ 34.780672] The buggy address belongs to the object at ffff88800e4d4488 [ 34.780672] which belongs to the cache vm_area_struct of size 168 [ 34.782336] The buggy address is located 88 bytes inside of [ 34.782336] freed 168-byte region [ffff88800e4d4488, ffff88800e4d4530) [ 34.783934] [ 34.784172] The buggy address belongs to the physical page: [ 34.784915] page:000000006bd97695 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4d4 [ 34.786138] memcg:ffff88800f7d9a01 [ 34.786621] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.787407] page_type: 0xffffffff() [ 34.787905] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.788951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7d9a01 [ 34.789950] page dumped because: kasan: bad access detected [ 34.790698] [ 34.790943] Memory state around the buggy address: [ 34.791591] ffff88800e4d4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.792560] ffff88800e4d4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.793530] >ffff88800e4d4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.794495] ^ [ 34.795357] ffff88800e4d4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 34.796300] ffff88800e4d4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.797252] ================================================================== [ 34.798733] Disabling lock debugging due to kernel taint [ 36.929584] BUG: Bad rss-counter state mm:00000000ab968729 type:MM_FILEPAGES val:33 [ 36.930864] BUG: Bad rss-counter state mm:00000000ab968729 type:MM_ANONPAGES val:22 [ 37.377601] BUG: Bad rss-counter state mm:00000000885716fc type:MM_FILEPAGES val:33 [ 37.378761] BUG: Bad rss-counter state mm:00000000885716fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39978' (ECDSA) to the list of known hosts. 2023/06/19 12:07:14 fuzzer started 2023/06/19 12:07:14 dialing manager at localhost:44161 2023/06/19 12:07:14 checking machine... 2023/06/19 12:07:14 checking revisions... [ 38.069990] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:07:15 testing simple program... [ 38.110817] cgroup: Unknown subsys name 'net' [ 38.156663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:07:08 Registers: info registers vcpu 0 RAX=ffffffff83c1fca0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880169ffb01 RSI=ffff8880169ffb70 RDI=ffff8880169ffb70 RBP=ffff8880169ff678 RSP=ffff8880169ff5a8 R8 =ffffffff863b4412 R9 =ffff8880169ff660 R10=0000000000038001 R11=000000000008b00b R12=ffff8880169ff680 R13=ffff8880169ff668 R14=ffff8880169ffb78 R15=ffff8880169ff620 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fe2d0d40900 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=00007fe2d12f5650 CR3=000000000d8f8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffc9d022718 CR3=00000000194a0000 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=2034313a37303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000