syzkaller login: [ 34.028987] BUG: Bad rss-counter state mm:0000000067846548 type:MM_FILEPAGES val:33 [ 34.031985] BUG: Bad rss-counter state mm:0000000067846548 type:MM_ANONPAGES val:22 [ 34.211476] ================================================================== [ 34.212423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.213357] Read of size 8 at addr ffff88800e47c968 by task sshd/226 [ 34.214205] [ 34.214431] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.215294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.216312] Call Trace: [ 34.216629] [ 34.216914] dump_stack_lvl+0x91/0xf0 [ 34.217407] print_report+0xcc/0x620 [ 34.217901] ? __virt_addr_valid+0x102/0x340 [ 34.218456] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.219076] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.219712] kasan_report+0xbe/0xf0 [ 34.220198] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.220832] vma_interval_tree_remove+0xc75/0xec0 [ 34.221447] vma_prepare+0xc54/0x11a0 [ 34.221930] __split_vma+0x5af/0x950 [ 34.222406] ? __pfx___split_vma+0x10/0x10 [ 34.222956] ? find_held_lock+0x2c/0x110 [ 34.223499] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.224088] ? lock_is_held_type+0x9f/0x120 [ 34.224637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.225263] ? mtree_range_walk+0x632/0x900 [ 34.225823] ? mas_walk+0x5c7/0x7c0 [ 34.226304] do_vmi_munmap+0x1f1/0x2b0 [ 34.226800] mmap_region+0x1f9/0x2660 [ 34.227284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.227819] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.228563] ? __pfx_lock_acquire+0x10/0x10 [ 34.229093] ? __pfx_mmap_region+0x10/0x10 [ 34.229623] ? security_mmap_addr+0x7d/0xa0 [ 34.230169] ? get_unmapped_area+0x1f5/0x3f0 [ 34.230716] do_mmap+0x854/0xf00 [ 34.231160] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.231661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.232249] ksys_mmap_pgoff+0x3af/0x500 [ 34.232765] do_syscall_64+0x3f/0x90 [ 34.233254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.233925] RIP: 0033:0x7f8668b6fd82 [ 34.234397] 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 [ 34.236623] RSP: 002b:00007ffedb9f46b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.237536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8668b6fd82 [ 34.238413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8667fa9000 [ 34.239267] RBP: 00007f8667fa9000 R08: 0000000000000009 R09: 0000000000001000 [ 34.240150] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641cd432b20 [ 34.241015] R13: 00007ffedb9f46d0 R14: 00007ffedb9f4700 R15: 00007ffedb9f4a60 [ 34.241894] [ 34.242199] [ 34.242415] Allocated by task 219: [ 34.242848] kasan_save_stack+0x22/0x50 [ 34.243366] kasan_set_track+0x25/0x30 [ 34.243875] __kasan_slab_alloc+0x59/0x70 [ 34.244394] kmem_cache_alloc+0x16b/0x370 [ 34.244918] vm_area_dup+0x20/0x160 [ 34.245379] __split_vma+0x170/0x950 [ 34.245851] split_vma+0xc6/0x110 [ 34.246295] mprotect_fixup+0x8d2/0xb30 [ 34.246802] do_mprotect_pkey+0x87e/0xd40 [ 34.247328] __x64_sys_mprotect+0x78/0xc0 [ 34.247874] do_syscall_64+0x3f/0x90 [ 34.248352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.249000] [ 34.249219] Freed by task 19: [ 34.249607] kasan_save_stack+0x22/0x50 [ 34.250114] kasan_set_track+0x25/0x30 [ 34.250614] kasan_save_free_info+0x2b/0x50 [ 34.251162] __kasan_slab_free+0x10a/0x190 [ 34.251705] kmem_cache_free+0x10d/0x4d0 [ 34.252215] rcu_core+0x8c8/0x2860 [ 34.252673] __do_softirq+0x1b7/0x7d4 [ 34.253161] [ 34.253383] Last potentially related work creation: [ 34.253974] kasan_save_stack+0x22/0x50 [ 34.254484] __kasan_record_aux_stack+0x8e/0xa0 [ 34.255070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.255734] remove_vma+0x139/0x170 [ 34.256194] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.256757] do_vmi_munmap+0x1f1/0x2b0 [ 34.257250] __vm_munmap+0x138/0x3a0 [ 34.257728] __x64_sys_munmap+0x59/0x80 [ 34.258233] do_syscall_64+0x3f/0x90 [ 34.258709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.259359] [ 34.259579] Second to last potentially related work creation: [ 34.260287] kasan_save_stack+0x22/0x50 [ 34.260802] __kasan_record_aux_stack+0x8e/0xa0 [ 34.261388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.262044] remove_vma+0x139/0x170 [ 34.262502] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.263068] do_vmi_munmap+0x1f1/0x2b0 [ 34.263560] mmap_region+0x1f9/0x2660 [ 34.264055] do_mmap+0x854/0xf00 [ 34.264532] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.265106] ksys_mmap_pgoff+0x3af/0x500 [ 34.265691] do_syscall_64+0x3f/0x90 [ 34.266250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.266991] [ 34.267238] The buggy address belongs to the object at ffff88800e47c910 [ 34.267238] which belongs to the cache vm_area_struct of size 168 [ 34.268990] The buggy address is located 88 bytes inside of [ 34.268990] freed 168-byte region [ffff88800e47c910, ffff88800e47c9b8) [ 34.270633] [ 34.270887] The buggy address belongs to the physical page: [ 34.271665] page:00000000fd3cc647 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe47c [ 34.272948] memcg:ffff88800f363201 [ 34.273440] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.274196] page_type: 0xffffffff() [ 34.274717] raw: 0100000000000200 ffff88800879fc80 ffffea000051fd00 dead000000000006 [ 34.275792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f363201 [ 34.276854] page dumped because: kasan: bad access detected [ 34.277641] [ 34.277891] Memory state around the buggy address: [ 34.278565] ffff88800e47c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.279574] ffff88800e47c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.280599] >ffff88800e47c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.281609] ^ [ 34.282533] ffff88800e47c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.283536] ffff88800e47ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.284541] ================================================================== [ 34.285762] Disabling lock debugging due to kernel taint [ 36.176328] BUG: Bad rss-counter state mm:000000008f813819 type:MM_FILEPAGES val:33 [ 36.177550] BUG: Bad rss-counter state mm:000000008f813819 type:MM_ANONPAGES val:22 [ 36.556090] BUG: Bad rss-counter state mm:00000000dbcbe1be type:MM_FILEPAGES val:33 [ 36.557080] BUG: Bad rss-counter state mm:00000000dbcbe1be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24283' (ECDSA) to the list of known hosts. 2023/06/19 11:00:07 fuzzer started 2023/06/19 11:00:07 dialing manager at localhost:44161 2023/06/19 11:00:07 checking machine... 2023/06/19 11:00:07 checking revisions... [ 37.250272] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:00:08 testing simple program... [ 37.298169] cgroup: Unknown subsys name 'net' [ 37.334493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:05 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=00007ffc53755a18 CR3=0000000019e10000 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=2037303a30303a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a30303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888009f00400 RCX=0000000000000000 RDX=1ffff110013e00a7 RSI=ffffffff83c59007 RDI=ffff888009f00538 RBP=ffff88800f6e8f58 RSP=ffff8880169274a8 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88800f6e8f70 R11=00000c3600000ac3 R12=ffff888015d88780 R13=0000000000000014 R14=ffff888016927728 R15=0000000064903537 RIP=ffffffff83c59023 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 00007f656f433900 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=00007f656f9ea618 CR3=000000000da84000 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