syzkaller login: [ 31.274300] BUG: Bad rss-counter state mm:0000000064141c68 type:MM_FILEPAGES val:33 [ 31.275532] BUG: Bad rss-counter state mm:0000000064141c68 type:MM_ANONPAGES val:22 [ 31.312465] ================================================================== [ 31.313366] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.314351] Read of size 8 at addr ffff88800ca1cdf0 by task sshd/221 [ 31.315291] [ 31.315510] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.316366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.317358] Call Trace: [ 31.317678] [ 31.317965] dump_stack_lvl+0x91/0xf0 [ 31.318450] print_report+0xcc/0x620 [ 31.318933] ? __virt_addr_valid+0x102/0x340 [ 31.319483] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320101] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320744] kasan_report+0xbe/0xf0 [ 31.321232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321855] vma_interval_tree_remove+0xc75/0xec0 [ 31.322459] vma_prepare+0xc54/0x11a0 [ 31.322935] __split_vma+0x5af/0x950 [ 31.323409] ? __pfx___split_vma+0x10/0x10 [ 31.323946] ? find_held_lock+0x2c/0x110 [ 31.324463] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.325026] ? lock_is_held_type+0x9f/0x120 [ 31.325583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.326193] ? mtree_range_walk+0x632/0x900 [ 31.326747] ? mas_walk+0x5c7/0x7c0 [ 31.327223] do_vmi_munmap+0x1f1/0x2b0 [ 31.327717] mmap_region+0x1f9/0x2660 [ 31.328197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.328708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.329457] ? __pfx_lock_acquire+0x10/0x10 [ 31.329987] ? __pfx_mmap_region+0x10/0x10 [ 31.330513] ? security_mmap_addr+0x7d/0xa0 [ 31.331038] ? get_unmapped_area+0x1f5/0x3f0 [ 31.331603] do_mmap+0x854/0xf00 [ 31.332040] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.332535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.333095] ksys_mmap_pgoff+0x3af/0x500 [ 31.333614] do_syscall_64+0x3f/0x90 [ 31.334093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334737] RIP: 0033:0x7fb07fd88d82 [ 31.335191] 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 [ 31.337347] RSP: 002b:00007ffec58c8848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.338255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb07fd88d82 [ 31.339116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb07f1c2000 [ 31.339960] RBP: 00007fb07f1c2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.340799] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbdfa2cec0 [ 31.341649] R13: 00007ffec58c8860 R14: 00007ffec58c8890 R15: 00007ffec58c8bf0 [ 31.342497] [ 31.342789] [ 31.343004] Allocated by task 214: [ 31.343432] kasan_save_stack+0x22/0x50 [ 31.343934] kasan_set_track+0x25/0x30 [ 31.344430] __kasan_slab_alloc+0x59/0x70 [ 31.344950] kmem_cache_alloc+0x16b/0x370 [ 31.345469] vm_area_dup+0x20/0x160 [ 31.345934] __split_vma+0x170/0x950 [ 31.346395] split_vma+0xc6/0x110 [ 31.346840] mprotect_fixup+0x8d2/0xb30 [ 31.347343] do_mprotect_pkey+0x87e/0xd40 [ 31.347859] __x64_sys_mprotect+0x78/0xc0 [ 31.348380] do_syscall_64+0x3f/0x90 [ 31.348854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.349528] [ 31.349744] Freed by task 214: [ 31.350139] kasan_save_stack+0x22/0x50 [ 31.350640] kasan_set_track+0x25/0x30 [ 31.351129] kasan_save_free_info+0x2b/0x50 [ 31.351655] __kasan_slab_free+0x10a/0x190 [ 31.352184] kmem_cache_free+0x10d/0x4d0 [ 31.352689] rcu_core+0x8c8/0x2860 [ 31.353136] __do_softirq+0x1b7/0x7d4 [ 31.353622] [ 31.353836] Last potentially related work creation: [ 31.354419] kasan_save_stack+0x22/0x50 [ 31.354922] __kasan_record_aux_stack+0x8e/0xa0 [ 31.355491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.356141] remove_vma+0x139/0x170 [ 31.356588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.357142] do_vmi_munmap+0x1f1/0x2b0 [ 31.357637] __vm_munmap+0x138/0x3a0 [ 31.358104] __x64_sys_munmap+0x59/0x80 [ 31.358609] do_syscall_64+0x3f/0x90 [ 31.359081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.359724] [ 31.359941] The buggy address belongs to the object at ffff88800ca1cd98 [ 31.359941] which belongs to the cache vm_area_struct of size 168 [ 31.361434] The buggy address is located 88 bytes inside of [ 31.361434] freed 168-byte region [ffff88800ca1cd98, ffff88800ca1ce40) [ 31.362836] [ 31.363055] The buggy address belongs to the physical page: [ 31.363722] page:0000000034214572 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca1c [ 31.364825] memcg:ffff88800c66b501 [ 31.365261] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.365929] page_type: 0xffffffff() [ 31.366389] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.367317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c66b501 [ 31.368244] page dumped because: kasan: bad access detected [ 31.368914] [ 31.369129] Memory state around the buggy address: [ 31.369739] ffff88800ca1cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.370601] ffff88800ca1cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.371467] >ffff88800ca1cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.372324] ^ [ 31.373135] ffff88800ca1ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.374005] ffff88800ca1ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.374851] ================================================================== [ 31.376005] Disabling lock debugging due to kernel taint [ 33.020764] BUG: Bad rss-counter state mm:00000000d8c23adb type:MM_FILEPAGES val:33 [ 33.021359] BUG: Bad rss-counter state mm:00000000d8c23adb type:MM_ANONPAGES val:22 [ 33.402266] BUG: Bad rss-counter state mm:000000008bcffab3 type:MM_FILEPAGES val:33 [ 33.403346] BUG: Bad rss-counter state mm:000000008bcffab3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48815' (ECDSA) to the list of known hosts. 2023/06/20 12:08:49 fuzzer started 2023/06/20 12:08:50 dialing manager at localhost:36067 2023/06/20 12:08:50 checking machine... 2023/06/20 12:08:50 checking revisions... [ 34.086738] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:08:50 testing simple program... [ 34.141927] cgroup: Unknown subsys name 'net' [ 34.238603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:49 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880145c51c0 RSI=ffffffff817ef098 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88801cdf7190 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff814c086b RFL=00000287 [--S--PC] 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 00007fd6c41c2900 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=00005634bacda380 CR3=0000000009672000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1412c78000 CR3=0000000018cc6000 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=2039343a38303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a38303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000