syzkaller login: [ 31.926752] BUG: Bad rss-counter state mm:0000000025fb6c45 type:MM_FILEPAGES val:33 [ 31.928166] BUG: Bad rss-counter state mm:0000000025fb6c45 type:MM_ANONPAGES val:22 [ 32.071563] ================================================================== [ 32.072578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.073506] Read of size 8 at addr ffff888012ca25c8 by task sshd/222 [ 32.074385] [ 32.074602] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.075480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.076461] Call Trace: [ 32.076777] <TASK> [ 32.077061] dump_stack_lvl+0x91/0xf0 [ 32.077554] print_report+0xcc/0x620 [ 32.078041] ? __virt_addr_valid+0x102/0x340 [ 32.078589] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.079199] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.079844] kasan_report+0xbe/0xf0 [ 32.080317] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.080953] vma_interval_tree_remove+0xc75/0xec0 [ 32.081552] vma_prepare+0xc54/0x11a0 [ 32.082028] __split_vma+0x5af/0x950 [ 32.082498] ? __pfx___split_vma+0x10/0x10 [ 32.083021] ? find_held_lock+0x2c/0x110 [ 32.083540] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.084101] ? lock_is_held_type+0x9f/0x120 [ 32.084633] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.085233] ? mtree_range_walk+0x632/0x900 [ 32.085783] ? mas_walk+0x5c7/0x7c0 [ 32.086250] do_vmi_munmap+0x1f1/0x2b0 [ 32.086739] mmap_region+0x1f9/0x2660 [ 32.087215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.087730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.088443] ? __pfx_lock_acquire+0x10/0x10 [ 32.088973] ? __pfx_mmap_region+0x10/0x10 [ 32.089512] ? security_mmap_addr+0x7d/0xa0 [ 32.090036] ? get_unmapped_area+0x1f5/0x3f0 [ 32.090583] do_mmap+0x854/0xf00 [ 32.091021] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.091533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.092085] ksys_mmap_pgoff+0x3af/0x500 [ 32.092599] do_syscall_64+0x3f/0x90 [ 32.093071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.093720] RIP: 0033:0x7f667d089d82 [ 32.094174] 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 [ 32.096274] RSP: 002b:00007ffea00f1958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.097164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f667d089d82 [ 32.098034] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f667c4c3000 [ 32.098876] RBP: 00007f667c4c3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.099723] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563fc03fec0 [ 32.100564] R13: 00007ffea00f1970 R14: 00007ffea00f19a0 R15: 00007ffea00f1d00 [ 32.101419] </TASK> [ 32.101712] [ 32.101927] Allocated by task 215: [ 32.102352] kasan_save_stack+0x22/0x50 [ 32.102847] kasan_set_track+0x25/0x30 [ 32.103358] __kasan_slab_alloc+0x59/0x70 [ 32.103874] kmem_cache_alloc+0x16b/0x370 [ 32.104387] vm_area_dup+0x20/0x160 [ 32.104835] __split_vma+0x170/0x950 [ 32.105299] split_vma+0xc6/0x110 [ 32.105733] mprotect_fixup+0x8d2/0xb30 [ 32.106230] do_mprotect_pkey+0x87e/0xd40 [ 32.106743] __x64_sys_mprotect+0x78/0xc0 [ 32.107259] do_syscall_64+0x3f/0x90 [ 32.107735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.108366] [ 32.108578] Freed by task 215: [ 32.108969] kasan_save_stack+0x22/0x50 [ 32.109474] kasan_set_track+0x25/0x30 [ 32.109964] kasan_save_free_info+0x2b/0x50 [ 32.110491] __kasan_slab_free+0x10a/0x190 [ 32.111026] kmem_cache_free+0x10d/0x4d0 [ 32.111535] rcu_core+0x8c8/0x2860 [ 32.111979] __do_softirq+0x1b7/0x7d4 [ 32.112455] [ 32.112671] Last potentially related work creation: [ 32.113256] kasan_save_stack+0x22/0x50 [ 32.113760] __kasan_record_aux_stack+0x8e/0xa0 [ 32.114326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.114964] remove_vma+0x139/0x170 [ 32.115434] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.115983] do_vmi_munmap+0x1f1/0x2b0 [ 32.116470] __vm_munmap+0x138/0x3a0 [ 32.116937] __x64_sys_munmap+0x59/0x80 [ 32.117436] do_syscall_64+0x3f/0x90 [ 32.117903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.118532] [ 32.118748] The buggy address belongs to the object at ffff888012ca2570 [ 32.118748] which belongs to the cache vm_area_struct of size 168 [ 32.120201] The buggy address is located 88 bytes inside of [ 32.120201] freed 168-byte region [ffff888012ca2570, ffff888012ca2618) [ 32.121600] [ 32.121816] The buggy address belongs to the physical page: [ 32.122467] page:00000000331bfd5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12ca2 [ 32.123567] memcg:ffff88800de42401 [ 32.123995] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.124638] page_type: 0xffffffff() [ 32.125086] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.126000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de42401 [ 32.126900] page dumped because: kasan: bad access detected [ 32.127563] [ 32.127782] Memory state around the buggy address: [ 32.128353] ffff888012ca2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.129208] ffff888012ca2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.130055] >ffff888012ca2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.130902] ^ [ 32.131591] ffff888012ca2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.132443] ffff888012ca2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.133283] ================================================================== [ 32.134241] Disabling lock debugging due to kernel taint [ 34.213274] BUG: Bad rss-counter state mm:000000009cc52194 type:MM_FILEPAGES val:33 [ 34.214260] BUG: Bad rss-counter state mm:000000009cc52194 type:MM_ANONPAGES val:22 [ 34.682167] BUG: Bad rss-counter state mm:0000000061872e3d type:MM_FILEPAGES val:33 [ 34.683141] BUG: Bad rss-counter state mm:0000000061872e3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23680' (ECDSA) to the list of known hosts. 2023/06/19 18:42:16 fuzzer started 2023/06/19 18:42:17 dialing manager at localhost:44161 2023/06/19 18:42:17 checking machine... 2023/06/19 18:42:17 checking revisions... [ 35.337407] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:17 testing simple program... [ 35.375683] cgroup: Unknown subsys name 'net' [ 35.413522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:16 Registers: info registers vcpu 0 RAX=ffffed1001c0dee9 RBX=1ffff11001c0dee9 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800e06f738 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e7d 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 00007f4ff8498900 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=00007faf3d6ac020 CR3=0000000016174000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f4ff8a500b0 CR3=00000000185ea000 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=2036313a32343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a32343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000