syzkaller login: [ 68.511758] BUG: Bad rss-counter state mm:000000005be7f1cc type:MM_FILEPAGES val:33 [ 68.514063] BUG: Bad rss-counter state mm:000000005be7f1cc type:MM_ANONPAGES val:22 [ 68.704622] ================================================================== [ 68.705709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.706916] Read of size 8 at addr ffff888015d2ed08 by task sshd/222 [ 68.707749] [ 68.707980] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 68.708906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.709948] Call Trace: [ 68.710285] <TASK> [ 68.710604] dump_stack_lvl+0x91/0xf0 [ 68.711121] print_report+0xcc/0x620 [ 68.711642] ? __virt_addr_valid+0x102/0x340 [ 68.712226] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.712893] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.713557] kasan_report+0xbe/0xf0 [ 68.714071] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.714742] vma_interval_tree_remove+0xc75/0xec0 [ 68.715380] vma_prepare+0xc54/0x11a0 [ 68.715892] __split_vma+0x5af/0x950 [ 68.716391] ? __pfx___split_vma+0x10/0x10 [ 68.716944] ? find_held_lock+0x2c/0x110 [ 68.717492] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.718089] ? lock_is_held_type+0x9f/0x120 [ 68.718674] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.719317] ? mtree_range_walk+0x632/0x900 [ 68.719897] ? mas_walk+0x5c7/0x7c0 [ 68.720398] do_vmi_munmap+0x1f1/0x2b0 [ 68.720918] mmap_region+0x1f9/0x2660 [ 68.721427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.721975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.722733] ? __pfx_lock_acquire+0x10/0x10 [ 68.723300] ? __pfx_mmap_region+0x10/0x10 [ 68.723857] ? security_mmap_addr+0x7d/0xa0 [ 68.724417] ? get_unmapped_area+0x1f5/0x3f0 [ 68.724991] do_mmap+0x854/0xf00 [ 68.725456] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.725979] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.726595] ksys_mmap_pgoff+0x3af/0x500 [ 68.727135] do_syscall_64+0x3f/0x90 [ 68.727641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.728336] RIP: 0033:0x7ff852014d82 [ 68.728822] 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 [ 68.731078] RSP: 002b:00007fff1d4085d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.732036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff852014d82 [ 68.732928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff85144e000 [ 68.733823] RBP: 00007ff85144e000 R08: 0000000000000009 R09: 0000000000001000 [ 68.734745] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e5f15cf70 [ 68.735640] R13: 00007fff1d4085f0 R14: 00007fff1d408620 R15: 00007fff1d408980 [ 68.736564] </TASK> [ 68.736873] [ 68.737105] Allocated by task 213: [ 68.737571] kasan_save_stack+0x22/0x50 [ 68.738113] kasan_set_track+0x25/0x30 [ 68.738649] __kasan_slab_alloc+0x59/0x70 [ 68.739207] kmem_cache_alloc+0x16b/0x370 [ 68.739763] vm_area_dup+0x20/0x160 [ 68.740251] __split_vma+0x170/0x950 [ 68.740749] split_vma+0xc6/0x110 [ 68.741225] mprotect_fixup+0x8d2/0xb30 [ 68.741764] do_mprotect_pkey+0x87e/0xd40 [ 68.742321] __x64_sys_mprotect+0x78/0xc0 [ 68.742895] do_syscall_64+0x3f/0x90 [ 68.743426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.744124] [ 68.744356] Freed by task 213: [ 68.744791] kasan_save_stack+0x22/0x50 [ 68.745332] kasan_set_track+0x25/0x30 [ 68.745858] kasan_save_free_info+0x2b/0x50 [ 68.746433] __kasan_slab_free+0x10a/0x190 [ 68.746995] kmem_cache_free+0x10d/0x4d0 [ 68.747531] rcu_core+0x8c8/0x2860 [ 68.748007] __do_softirq+0x1b7/0x7d4 [ 68.748523] [ 68.748750] Last potentially related work creation: [ 68.749374] kasan_save_stack+0x22/0x50 [ 68.749909] __kasan_record_aux_stack+0x8e/0xa0 [ 68.750535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.751216] remove_vma+0x139/0x170 [ 68.751700] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.752286] do_vmi_munmap+0x1f1/0x2b0 [ 68.752805] __vm_munmap+0x138/0x3a0 [ 68.753328] __x64_sys_munmap+0x59/0x80 [ 68.753869] do_syscall_64+0x3f/0x90 [ 68.754370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.755067] [ 68.755307] The buggy address belongs to the object at ffff888015d2ecb0 [ 68.755307] which belongs to the cache vm_area_struct of size 168 [ 68.756891] The buggy address is located 88 bytes inside of [ 68.756891] freed 168-byte region [ffff888015d2ecb0, ffff888015d2ed58) [ 68.758406] [ 68.758640] The buggy address belongs to the physical page: [ 68.759343] page:00000000414e1e6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d2e [ 68.760501] memcg:ffff88800e8e1b01 [ 68.760959] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.761647] page_type: 0xffffffff() [ 68.762127] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 68.763124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8e1b01 [ 68.764079] page dumped because: kasan: bad access detected [ 68.764785] [ 68.765016] Memory state around the buggy address: [ 68.765638] ffff888015d2ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 68.766594] ffff888015d2ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 68.767509] >ffff888015d2ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 68.768435] ^ [ 68.768901] ffff888015d2ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 68.769815] ffff888015d2ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 68.770749] ================================================================== [ 68.771860] Disabling lock debugging due to kernel taint [ 70.943101] BUG: Bad rss-counter state mm:00000000017c71c3 type:MM_FILEPAGES val:33 [ 70.944267] BUG: Bad rss-counter state mm:00000000017c71c3 type:MM_ANONPAGES val:22 [ 71.436446] BUG: Bad rss-counter state mm:00000000aef92b47 type:MM_FILEPAGES val:33 [ 71.437489] BUG: Bad rss-counter state mm:00000000aef92b47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21193' (ECDSA) to the list of known hosts. 2023/06/19 22:05:29 fuzzer started 2023/06/19 22:05:29 dialing manager at localhost:44161 2023/06/19 22:05:29 checking machine... 2023/06/19 22:05:29 checking revisions... [ 72.143168] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:05:29 testing simple program... [ 72.195569] cgroup: Unknown subsys name 'net' [ 72.251963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:05:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009fa75c8 RCX=ffffffff864b9d56 RDX=1ffff110013f4ec4 RSI=0000000000000000 RDI=ffff888009fa75c8 RBP=ffff888009fa7620 RSP=ffff888009fa75b0 R8 =ffffffff864b9d5a R9 =ffff888009fa7608 R10=0000000000038001 R11=00000000000b6996 R12=ffff888009fa7690 R13=0000000000000000 R14=ffff888016d68000 R15=0000000000000000 RIP=ffffffff8113038e 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 00007f50af491700 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=00007fdd8ee0a2c0 CR3=000000000e412000 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=2038323a35303a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a35303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81370a3a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff81370a3a RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800c650000 R15=ffff88800da4da00 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007f1e675bb900 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=00007ffc514e3000 CR3=000000000c8cc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000