syzkaller login: [ 41.583734] BUG: Bad rss-counter state mm:000000002718ebef type:MM_FILEPAGES val:33 [ 41.585001] BUG: Bad rss-counter state mm:000000002718ebef type:MM_ANONPAGES val:22 [ 41.743662] ================================================================== [ 41.744751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.745825] Read of size 8 at addr ffff88800dc64a50 by task sshd/218 [ 41.746851] [ 41.747070] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.747931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.748925] Call Trace: [ 41.749244] [ 41.749598] dump_stack_lvl+0x91/0xf0 [ 41.750091] print_report+0xcc/0x620 [ 41.750582] ? __virt_addr_valid+0x102/0x340 [ 41.751142] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.751761] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.752380] kasan_report+0xbe/0xf0 [ 41.752865] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.753495] vma_interval_tree_remove+0xc75/0xec0 [ 41.754106] vma_prepare+0xc54/0x11a0 [ 41.754582] __split_vma+0x5af/0x950 [ 41.755056] ? __pfx___split_vma+0x10/0x10 [ 41.755585] ? find_held_lock+0x2c/0x110 [ 41.756107] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.756672] ? lock_is_held_type+0x9f/0x120 [ 41.757210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.757846] ? mtree_range_walk+0x632/0x900 [ 41.758395] ? mas_walk+0x5c7/0x7c0 [ 41.758871] do_vmi_munmap+0x1f1/0x2b0 [ 41.759357] mmap_region+0x1f9/0x2660 [ 41.759842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.760349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.761062] ? __pfx_lock_acquire+0x10/0x10 [ 41.761603] ? __pfx_mmap_region+0x10/0x10 [ 41.762128] ? security_mmap_addr+0x7d/0xa0 [ 41.762664] ? get_unmapped_area+0x1f5/0x3f0 [ 41.763209] do_mmap+0x854/0xf00 [ 41.763645] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.764140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.764703] ksys_mmap_pgoff+0x3af/0x500 [ 41.765206] do_syscall_64+0x3f/0x90 [ 41.765706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.766352] RIP: 0033:0x7f4f9b623d82 [ 41.766809] 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 [ 41.768923] RSP: 002b:00007fff1e0cf828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.769839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f9b623d82 [ 41.770691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f9aa5d000 [ 41.771543] RBP: 00007f4f9aa5d000 R08: 0000000000000009 R09: 0000000000001000 [ 41.772385] R10: 0000000000000812 R11: 0000000000000206 R12: 000056209ae6fd90 [ 41.773233] R13: 00007fff1e0cf840 R14: 00007fff1e0cf870 R15: 00007fff1e0cfbd0 [ 41.774113] [ 41.774405] [ 41.774619] Allocated by task 211: [ 41.775044] kasan_save_stack+0x22/0x50 [ 41.775545] kasan_set_track+0x25/0x30 [ 41.776041] __kasan_slab_alloc+0x59/0x70 [ 41.776571] kmem_cache_alloc+0x16b/0x370 [ 41.777088] vm_area_dup+0x20/0x160 [ 41.777549] __split_vma+0x170/0x950 [ 41.778019] split_vma+0xc6/0x110 [ 41.778464] mprotect_fixup+0x8d2/0xb30 [ 41.778966] do_mprotect_pkey+0x87e/0xd40 [ 41.779486] __x64_sys_mprotect+0x78/0xc0 [ 41.780012] do_syscall_64+0x3f/0x90 [ 41.780491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.781142] [ 41.781385] Freed by task 211: [ 41.781780] kasan_save_stack+0x22/0x50 [ 41.782287] kasan_set_track+0x25/0x30 [ 41.782789] kasan_save_free_info+0x2b/0x50 [ 41.783325] __kasan_slab_free+0x10a/0x190 [ 41.783862] kmem_cache_free+0x10d/0x4d0 [ 41.784374] rcu_core+0x8c8/0x2860 [ 41.784821] __do_softirq+0x1b7/0x7d4 [ 41.785313] [ 41.785529] Last potentially related work creation: [ 41.786119] kasan_save_stack+0x22/0x50 [ 41.786625] __kasan_record_aux_stack+0x8e/0xa0 [ 41.787243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.787906] remove_vma+0x139/0x170 [ 41.788464] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.789034] do_vmi_munmap+0x1f1/0x2b0 [ 41.789550] __vm_munmap+0x138/0x3a0 [ 41.790030] __x64_sys_munmap+0x59/0x80 [ 41.790530] do_syscall_64+0x3f/0x90 [ 41.791015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.791661] [ 41.791881] Second to last potentially related work creation: [ 41.792573] kasan_save_stack+0x22/0x50 [ 41.793085] __kasan_record_aux_stack+0x8e/0xa0 [ 41.793676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.794324] remove_vma+0x139/0x170 [ 41.794794] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.795355] do_vmi_munmap+0x1f1/0x2b0 [ 41.795860] mmap_region+0x1f9/0x2660 [ 41.796331] do_mmap+0x854/0xf00 [ 41.796761] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.797248] ksys_mmap_pgoff+0x3af/0x500 [ 41.797760] do_syscall_64+0x3f/0x90 [ 41.798229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.798863] [ 41.799079] The buggy address belongs to the object at ffff88800dc649f8 [ 41.799079] which belongs to the cache vm_area_struct of size 168 [ 41.800539] The buggy address is located 88 bytes inside of [ 41.800539] freed 168-byte region [ffff88800dc649f8, ffff88800dc64aa0) [ 41.801952] [ 41.802170] The buggy address belongs to the physical page: [ 41.802828] page:00000000ca00fe8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc64 [ 41.803909] memcg:ffff88800d101501 [ 41.804336] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.805056] page_type: 0xffffffff() [ 41.805525] raw: 0100000000000200 ffff88800879fc80 ffffea00003888c0 dead000000000007 [ 41.806444] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d101501 [ 41.807357] page dumped because: kasan: bad access detected [ 41.808020] [ 41.808234] Memory state around the buggy address: [ 41.808816] ffff88800dc64900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.809667] ffff88800dc64980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 41.810525] >ffff88800dc64a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.811385] ^ [ 41.812088] ffff88800dc64a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 41.812936] ffff88800dc64b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.813812] ================================================================== [ 41.814792] Disabling lock debugging due to kernel taint [ 44.235752] BUG: Bad rss-counter state mm:000000005434b0ae type:MM_FILEPAGES val:33 [ 44.236802] BUG: Bad rss-counter state mm:000000005434b0ae type:MM_ANONPAGES val:22 [ 44.763582] BUG: Bad rss-counter state mm:00000000731f23a7 type:MM_FILEPAGES val:33 [ 44.765168] BUG: Bad rss-counter state mm:00000000731f23a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4834' (ECDSA) to the list of known hosts. 2023/06/19 23:19:51 fuzzer started 2023/06/19 23:19:52 dialing manager at localhost:44161 2023/06/19 23:19:52 checking machine... 2023/06/19 23:19:52 checking revisions... [ 45.460428] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:19:52 testing simple program... [ 45.502799] cgroup: Unknown subsys name 'net' [ 45.570748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:19:48 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=ffff88800c9cb680 RSI=ffffffff813cb34a RDI=0000000000000000 RBP=0000000a6211d3a9 RSP=ffff88800c64fd00 R8 =0000000000000000 R9 =fffffbfff0a81e50 R10=ffffffff8540f283 R11=0000000000000000 R12=0000000a6211b2c0 R13=0000000a6211b2c0 R14=ffff88800c64ff58 R15=dffffc0000000000 RIP=ffffffff813c7d31 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0c87798900 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=000055974f1b52c0 CR3=0000000013ace000 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=674dcb7a86e8d12941bd7b39b0f37d4e XMM01=de1e7d400a69c67af2c36b7696b481b8 XMM02=11665c4233b6403c45a18399f3dded87 XMM03=6f94891fd99aaebc5ffd71a3e94359c9 XMM04=2f12f8225c474193dd1dc4081ef7879f XMM05=7009c0ea768189a8432f2455f021dfce XMM06=d6c1ad7eca7124d40c2289e3955a3b98 XMM07=1ca1f434141da251747902d8e917afc5 XMM08=6e1c7a1192a8ab20888df0fde1f8a857 XMM09=00000000000000060000000000000000 XMM10=88e60dc05e64fa68d444728423eeaab1 XMM11=91ccf79b9d0f3b7b2657c4bf75b8c685 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800dc418d0 RBX=ffff888008e57dc8 RCX=1ffff11001b8831a RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008e57dd8 RBP=0000000000000003 RSP=ffff888008e57d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e57dc8 R14=ffff88806cf35000 R15=ffff88800dc41c60 RIP=ffffffff8137fc84 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 =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=000055fc92852768 CR3=000000000d776000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000