syzkaller login: [ 31.531332] BUG: Bad rss-counter state mm:00000000bf3c4e19 type:MM_FILEPAGES val:33 [ 31.532493] BUG: Bad rss-counter state mm:00000000bf3c4e19 type:MM_ANONPAGES val:22 [ 31.626989] ================================================================== [ 31.627998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.629072] Read of size 8 at addr ffff888019498ed8 by task sshd/220 [ 31.630056] [ 31.630306] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.631240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.632297] Call Trace: [ 31.632649] [ 31.632960] dump_stack_lvl+0x91/0xf0 [ 31.633501] print_report+0xcc/0x620 [ 31.634045] ? __virt_addr_valid+0x102/0x340 [ 31.634653] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.635335] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.636018] kasan_report+0xbe/0xf0 [ 31.636541] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.637236] vma_interval_tree_remove+0xc75/0xec0 [ 31.637904] vma_prepare+0xc54/0x11a0 [ 31.638441] __split_vma+0x5af/0x950 [ 31.638962] ? __pfx___split_vma+0x10/0x10 [ 31.639543] ? find_held_lock+0x2c/0x110 [ 31.640121] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.640743] ? lock_is_held_type+0x9f/0x120 [ 31.641341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.642033] ? mtree_range_walk+0x632/0x900 [ 31.642642] ? mas_walk+0x5c7/0x7c0 [ 31.643166] do_vmi_munmap+0x1f1/0x2b0 [ 31.643709] mmap_region+0x1f9/0x2660 [ 31.644245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.644807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.645590] ? __pfx_lock_acquire+0x10/0x10 [ 31.646190] ? __pfx_mmap_region+0x10/0x10 [ 31.646775] ? security_mmap_addr+0x7d/0xa0 [ 31.647361] ? get_unmapped_area+0x1f5/0x3f0 [ 31.647966] do_mmap+0x854/0xf00 [ 31.648474] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.649021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.649642] ksys_mmap_pgoff+0x3af/0x500 [ 31.650215] do_syscall_64+0x3f/0x90 [ 31.650747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.651459] RIP: 0033:0x7f9623369d82 [ 31.651966] 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 [ 31.654347] RSP: 002b:00007ffd3ccc8548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.655355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9623369d82 [ 31.656299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96227a3000 [ 31.657241] RBP: 00007f96227a3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.658186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aaf404aec0 [ 31.659139] R13: 00007ffd3ccc8560 R14: 00007ffd3ccc8590 R15: 00007ffd3ccc88f0 [ 31.660081] [ 31.660403] [ 31.660642] Allocated by task 213: [ 31.661120] kasan_save_stack+0x22/0x50 [ 31.661677] kasan_set_track+0x25/0x30 [ 31.662232] __kasan_slab_alloc+0x59/0x70 [ 31.662811] kmem_cache_alloc+0x16b/0x370 [ 31.663370] vm_area_dup+0x20/0x160 [ 31.663848] __split_vma+0x170/0x950 [ 31.664346] split_vma+0xc6/0x110 [ 31.664811] mprotect_fixup+0x8d2/0xb30 [ 31.665343] do_mprotect_pkey+0x87e/0xd40 [ 31.665893] __x64_sys_mprotect+0x78/0xc0 [ 31.666472] do_syscall_64+0x3f/0x90 [ 31.666974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.667653] [ 31.667879] Freed by task 213: [ 31.668299] kasan_save_stack+0x22/0x50 [ 31.668841] kasan_set_track+0x25/0x30 [ 31.669381] kasan_save_free_info+0x2b/0x50 [ 31.669974] __kasan_slab_free+0x10a/0x190 [ 31.670559] kmem_cache_free+0x10d/0x4d0 [ 31.671120] rcu_core+0x8c8/0x2860 [ 31.671607] __do_softirq+0x1b7/0x7d4 [ 31.672138] [ 31.672383] Last potentially related work creation: [ 31.673006] kasan_save_stack+0x22/0x50 [ 31.673543] __kasan_record_aux_stack+0x8e/0xa0 [ 31.674183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.674896] remove_vma+0x139/0x170 [ 31.675381] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.675965] do_vmi_munmap+0x1f1/0x2b0 [ 31.676482] __vm_munmap+0x138/0x3a0 [ 31.676976] __x64_sys_munmap+0x59/0x80 [ 31.677510] do_syscall_64+0x3f/0x90 [ 31.678038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.678722] [ 31.678951] The buggy address belongs to the object at ffff888019498e80 [ 31.678951] which belongs to the cache vm_area_struct of size 168 [ 31.680519] The buggy address is located 88 bytes inside of [ 31.680519] freed 168-byte region [ffff888019498e80, ffff888019498f28) [ 31.682021] [ 31.682259] The buggy address belongs to the physical page: [ 31.682959] page:000000007acd5949 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19498 [ 31.684110] memcg:ffff88800fc9f901 [ 31.684571] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.685253] page_type: 0xffffffff() [ 31.685724] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.686700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc9f901 [ 31.687659] page dumped because: kasan: bad access detected [ 31.688357] [ 31.688588] Memory state around the buggy address: [ 31.689204] ffff888019498d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.690121] ffff888019498e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.691025] >ffff888019498e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.691916] ^ [ 31.692727] ffff888019498f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.693670] ffff888019498f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.694646] ================================================================== [ 31.695817] Disabling lock debugging due to kernel taint [ 33.610997] BUG: Bad rss-counter state mm:00000000545e0768 type:MM_FILEPAGES val:33 [ 33.611905] BUG: Bad rss-counter state mm:00000000545e0768 type:MM_ANONPAGES val:22 [ 34.082013] BUG: Bad rss-counter state mm:00000000f9d327f5 type:MM_FILEPAGES val:33 [ 34.083262] BUG: Bad rss-counter state mm:00000000f9d327f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44530' (ECDSA) to the list of known hosts. 2023/06/21 03:46:37 fuzzer started 2023/06/21 03:46:38 dialing manager at localhost:36067 2023/06/21 03:46:38 checking machine... 2023/06/21 03:46:38 checking revisions... [ 34.927239] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:46:38 testing simple program... [ 34.987838] cgroup: Unknown subsys name 'net' [ 35.025764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:46:37 Registers: info registers vcpu 0 RAX=ffffffff8180c6a2 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f617a01 RSI=ffff88800f617af0 RDI=ffff88800f617af0 RBP=ffff88806ce09aa8 RSP=ffff88806ce099d8 R8 =ffffffff860d825a R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88800f617af8 R15=ffff88806ce09a50 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 00007f7e9446c900 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=00007f7e94a21650 CR3=000000000cb6a000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007fffde23e2a8 CR3=000000000e316000 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=2037333a36343a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000