syzkaller login: [ 32.029941] BUG: Bad rss-counter state mm:00000000b12f3755 type:MM_FILEPAGES val:33 [ 32.030943] BUG: Bad rss-counter state mm:00000000b12f3755 type:MM_ANONPAGES val:22 [ 32.176431] ================================================================== [ 32.177542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.178624] Read of size 8 at addr ffff888016595d08 by task sshd/219 [ 32.179458] [ 32.179674] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.180539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.181525] Call Trace: [ 32.181848] [ 32.182129] dump_stack_lvl+0x91/0xf0 [ 32.182621] print_report+0xcc/0x620 [ 32.183103] ? __virt_addr_valid+0x102/0x340 [ 32.183653] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.184268] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.184881] kasan_report+0xbe/0xf0 [ 32.185365] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.185990] vma_interval_tree_remove+0xc75/0xec0 [ 32.186584] vma_prepare+0xc54/0x11a0 [ 32.187063] __split_vma+0x5af/0x950 [ 32.187528] ? __pfx___split_vma+0x10/0x10 [ 32.188051] ? find_held_lock+0x2c/0x110 [ 32.188564] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.189121] ? lock_is_held_type+0x9f/0x120 [ 32.189676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.190277] ? mtree_range_walk+0x632/0x900 [ 32.190823] ? mas_walk+0x5c7/0x7c0 [ 32.191296] do_vmi_munmap+0x1f1/0x2b0 [ 32.191787] mmap_region+0x1f9/0x2660 [ 32.192264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.192767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.193471] ? __pfx_lock_acquire+0x10/0x10 [ 32.194000] ? __pfx_mmap_region+0x10/0x10 [ 32.194525] ? security_mmap_addr+0x7d/0xa0 [ 32.195050] ? get_unmapped_area+0x1f5/0x3f0 [ 32.195595] do_mmap+0x854/0xf00 [ 32.196028] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.196520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.197073] ksys_mmap_pgoff+0x3af/0x500 [ 32.197586] do_syscall_64+0x3f/0x90 [ 32.198057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.198687] RIP: 0033:0x7f1d2590ed82 [ 32.199138] 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 [ 32.201244] RSP: 002b:00007ffdbbd09368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.202173] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d2590ed82 [ 32.203015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d24d48000 [ 32.203849] RBP: 00007f1d24d48000 R08: 0000000000000009 R09: 0000000000001000 [ 32.204674] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631f24c5ec0 [ 32.205503] R13: 00007ffdbbd09380 R14: 00007ffdbbd093b0 R15: 00007ffdbbd09710 [ 32.206347] [ 32.206634] [ 32.206845] Allocated by task 212: [ 32.207266] kasan_save_stack+0x22/0x50 [ 32.207763] kasan_set_track+0x25/0x30 [ 32.208248] __kasan_slab_alloc+0x59/0x70 [ 32.208760] kmem_cache_alloc+0x16b/0x370 [ 32.209264] vm_area_dup+0x20/0x160 [ 32.209721] __split_vma+0x170/0x950 [ 32.210190] split_vma+0xc6/0x110 [ 32.210626] mprotect_fixup+0x8d2/0xb30 [ 32.211119] do_mprotect_pkey+0x87e/0xd40 [ 32.211633] __x64_sys_mprotect+0x78/0xc0 [ 32.212155] do_syscall_64+0x3f/0x90 [ 32.212622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.213256] [ 32.213485] Freed by task 212: [ 32.213872] kasan_save_stack+0x22/0x50 [ 32.214389] kasan_set_track+0x25/0x30 [ 32.214946] kasan_save_free_info+0x2b/0x50 [ 32.215547] __kasan_slab_free+0x10a/0x190 [ 32.216150] kmem_cache_free+0x10d/0x4d0 [ 32.216722] rcu_core+0x8c8/0x2860 [ 32.217221] __do_softirq+0x1b7/0x7d4 [ 32.217769] [ 32.218013] Last potentially related work creation: [ 32.218681] kasan_save_stack+0x22/0x50 [ 32.219248] __kasan_record_aux_stack+0x8e/0xa0 [ 32.219892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.220638] remove_vma+0x139/0x170 [ 32.221157] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.221811] do_vmi_munmap+0x1f1/0x2b0 [ 32.222360] __vm_munmap+0x138/0x3a0 [ 32.222864] __x64_sys_munmap+0x59/0x80 [ 32.223356] do_syscall_64+0x3f/0x90 [ 32.223831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.224469] [ 32.224685] The buggy address belongs to the object at ffff888016595cb0 [ 32.224685] which belongs to the cache vm_area_struct of size 168 [ 32.226150] The buggy address is located 88 bytes inside of [ 32.226150] freed 168-byte region [ffff888016595cb0, ffff888016595d58) [ 32.227554] [ 32.227772] The buggy address belongs to the physical page: [ 32.228423] page:00000000aa60ec51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16595 [ 32.229529] memcg:ffff88800d818201 [ 32.229951] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.230592] page_type: 0xffffffff() [ 32.231041] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.231958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d818201 [ 32.232865] page dumped because: kasan: bad access detected [ 32.233547] [ 32.233770] Memory state around the buggy address: [ 32.234364] ffff888016595c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.235263] ffff888016595c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.236188] >ffff888016595d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.237101] ^ [ 32.237573] ffff888016595d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.238474] ffff888016595e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.239371] ================================================================== [ 32.240397] Disabling lock debugging due to kernel taint [ 34.148855] BUG: Bad rss-counter state mm:00000000e13753d8 type:MM_FILEPAGES val:33 [ 34.150032] BUG: Bad rss-counter state mm:00000000e13753d8 type:MM_ANONPAGES val:22 [ 34.608484] BUG: Bad rss-counter state mm:00000000cabc3fae type:MM_FILEPAGES val:33 [ 34.609470] BUG: Bad rss-counter state mm:00000000cabc3fae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8829' (ECDSA) to the list of known hosts. 2023/06/19 19:54:41 fuzzer started 2023/06/19 19:54:41 dialing manager at localhost:44161 2023/06/19 19:54:41 checking machine... 2023/06/19 19:54:41 checking revisions... [ 35.343501] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:54:41 testing simple program... [ 35.395073] cgroup: Unknown subsys name 'net' [ 35.449064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:54:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f063ab6c650 CR3=000000001025e000 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=2031343a34353a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a34353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100304df47 RSI=ffffffff8363de43 RDI=ffff88801826faa8 RBP=ffff88801826fa78 RSP=ffff88801826f9d8 R8 =0000000000000001 R9 =ffff88801826fa20 R10=0000000000038001 R11=000000000008a973 R12=ffff88801826faa8 R13=0000000000000000 R14=ffff88801583d1c0 R15=ffff888009749be0 RIP=ffffffff813ad42e RFL=00000282 [--S----] 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 00007f063a5b7900 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=00007f063ab6f0b0 CR3=00000000182f0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000