syzkaller login: [ 28.687984] BUG: Bad rss-counter state mm:00000000c7ff27d0 type:MM_FILEPAGES val:33 [ 28.689560] BUG: Bad rss-counter state mm:00000000c7ff27d0 type:MM_ANONPAGES val:22 [ 28.835639] ================================================================== [ 28.836738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.837979] Read of size 8 at addr ffff88800ec50798 by task sshd/220 [ 28.838926] [ 28.839148] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.840042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.841035] Call Trace: [ 28.841365] [ 28.841657] dump_stack_lvl+0x91/0xf0 [ 28.842179] print_report+0xcc/0x620 [ 28.842681] ? __virt_addr_valid+0x102/0x340 [ 28.843246] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.843888] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.844531] kasan_report+0xbe/0xf0 [ 28.845015] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.845642] vma_interval_tree_remove+0xc75/0xec0 [ 28.846281] vma_prepare+0xc54/0x11a0 [ 28.846768] __split_vma+0x5af/0x950 [ 28.847238] ? __pfx___split_vma+0x10/0x10 [ 28.847778] ? find_held_lock+0x2c/0x110 [ 28.848303] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.848872] ? lock_is_held_type+0x9f/0x120 [ 28.849406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.850020] ? mtree_range_walk+0x632/0x900 [ 28.850586] ? mas_walk+0x5c7/0x7c0 [ 28.851068] do_vmi_munmap+0x1f1/0x2b0 [ 28.851566] mmap_region+0x1f9/0x2660 [ 28.852051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.852568] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.853284] ? __pfx_lock_acquire+0x10/0x10 [ 28.853825] ? __pfx_mmap_region+0x10/0x10 [ 28.854377] ? security_mmap_addr+0x7d/0xa0 [ 28.854914] ? get_unmapped_area+0x1f5/0x3f0 [ 28.855469] do_mmap+0x854/0xf00 [ 28.855915] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.856408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.856978] ksys_mmap_pgoff+0x3af/0x500 [ 28.857491] do_syscall_64+0x3f/0x90 [ 28.857968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.858628] RIP: 0033:0x7f78762d9d82 [ 28.859093] 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 [ 28.861221] RSP: 002b:00007ffedbd185d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.862167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78762d9d82 [ 28.863046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7875713000 [ 28.863913] RBP: 00007f7875713000 R08: 0000000000000009 R09: 0000000000001000 [ 28.864778] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561595295b20 [ 28.865633] R13: 00007ffedbd185f0 R14: 00007ffedbd18620 R15: 00007ffedbd18980 [ 28.866522] [ 28.866824] [ 28.867038] Allocated by task 213: [ 28.867472] kasan_save_stack+0x22/0x50 [ 28.867989] kasan_set_track+0x25/0x30 [ 28.868482] __kasan_slab_alloc+0x59/0x70 [ 28.869017] kmem_cache_alloc+0x16b/0x370 [ 28.869545] vm_area_dup+0x20/0x160 [ 28.869999] __split_vma+0x170/0x950 [ 28.870477] split_vma+0xc6/0x110 [ 28.870925] mprotect_fixup+0x8d2/0xb30 [ 28.871436] do_mprotect_pkey+0x87e/0xd40 [ 28.871971] __x64_sys_mprotect+0x78/0xc0 [ 28.872501] do_syscall_64+0x3f/0x90 [ 28.872981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.873623] [ 28.873839] Freed by task 213: [ 28.874265] kasan_save_stack+0x22/0x50 [ 28.874784] kasan_set_track+0x25/0x30 [ 28.875288] kasan_save_free_info+0x2b/0x50 [ 28.875827] __kasan_slab_free+0x10a/0x190 [ 28.876371] kmem_cache_free+0x10d/0x4d0 [ 28.876885] rcu_core+0x8c8/0x2860 [ 28.877338] __do_softirq+0x1b7/0x7d4 [ 28.877819] [ 28.878040] Last potentially related work creation: [ 28.878647] kasan_save_stack+0x22/0x50 [ 28.879159] __kasan_record_aux_stack+0x8e/0xa0 [ 28.879740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.880393] remove_vma+0x139/0x170 [ 28.880848] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.881408] do_vmi_munmap+0x1f1/0x2b0 [ 28.881900] __vm_munmap+0x138/0x3a0 [ 28.882386] __x64_sys_munmap+0x59/0x80 [ 28.882880] do_syscall_64+0x3f/0x90 [ 28.883357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884004] [ 28.884222] The buggy address belongs to the object at ffff88800ec50740 [ 28.884222] which belongs to the cache vm_area_struct of size 168 [ 28.885710] The buggy address is located 88 bytes inside of [ 28.885710] freed 168-byte region [ffff88800ec50740, ffff88800ec507e8) [ 28.887158] [ 28.887374] The buggy address belongs to the physical page: [ 28.888055] page:000000008a143727 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec50 [ 28.889159] memcg:ffff88800e22fe01 [ 28.889594] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.890256] page_type: 0xffffffff() [ 28.890723] raw: 0100000000000200 ffff88800879fc80 ffffea00003a5dc0 dead000000000006 [ 28.891655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e22fe01 [ 28.892574] page dumped because: kasan: bad access detected [ 28.893246] [ 28.893460] Memory state around the buggy address: [ 28.894064] ffff88800ec50680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.894964] ffff88800ec50700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.895833] >ffff88800ec50780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.896687] ^ [ 28.897196] ffff88800ec50800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.898063] ffff88800ec50880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.898935] ================================================================== [ 28.899919] Disabling lock debugging due to kernel taint [ 30.714647] BUG: Bad rss-counter state mm:000000004c19cda0 type:MM_FILEPAGES val:33 [ 30.715425] BUG: Bad rss-counter state mm:000000004c19cda0 type:MM_ANONPAGES val:22 [ 31.236618] BUG: Bad rss-counter state mm:00000000bff43d45 type:MM_FILEPAGES val:33 [ 31.237645] BUG: Bad rss-counter state mm:00000000bff43d45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58981' (ECDSA) to the list of known hosts. 2023/06/19 12:46:02 fuzzer started 2023/06/19 12:46:02 dialing manager at localhost:44161 2023/06/19 12:46:02 checking machine... 2023/06/19 12:46:02 checking revisions... [ 31.946476] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:46:02 testing simple program... [ 31.997610] cgroup: Unknown subsys name 'net' [ 32.042947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800b9c0000 RSP=ffff88806ce09de0 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=ffff88806ce09ff8 R12=000000000001c060 R13=ffff88800b9c44c8 R14=ffff88800b9c0234 R15=0000000000000001 RIP=ffffffff821927de RFL=00000046 [---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 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=000056494023ee58 CR3=000000000e620000 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=2031303a36343a3231203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383633313520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888006b17c30 RCX=ffffffff81f74732 RDX=ffff88801947b680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888006b179d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800cbfe808 R13=ffff888006b17c38 R14=ffff888006b17c48 R15=0000000000001032 RIP=ffffffff814c07eb 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 00007f690b236900 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=00007f690b7ed618 CR3=00000000168cc000 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