syzkaller login: [ 50.323691] BUG: Bad rss-counter state mm:00000000da314bd8 type:MM_FILEPAGES val:33 [ 50.324552] BUG: Bad rss-counter state mm:00000000da314bd8 type:MM_ANONPAGES val:22 [ 50.436885] ================================================================== [ 50.437543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.438166] Read of size 8 at addr ffff8880190ee310 by task sshd/227 [ 50.438680] [ 50.438827] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.439407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.440050] Call Trace: [ 50.440272] [ 50.440487] dump_stack_lvl+0x91/0xf0 [ 50.440834] print_report+0xcc/0x620 [ 50.441169] ? __virt_addr_valid+0x102/0x340 [ 50.441727] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.442146] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.442565] kasan_report+0xbe/0xf0 [ 50.442899] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.443326] vma_interval_tree_remove+0xc75/0xec0 [ 50.443812] vma_prepare+0xc54/0x11a0 [ 50.444131] __split_vma+0x5af/0x950 [ 50.444479] ? __pfx___split_vma+0x10/0x10 [ 50.444842] ? find_held_lock+0x2c/0x110 [ 50.445193] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.445570] ? lock_is_held_type+0x9f/0x120 [ 50.445935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.446336] ? mtree_range_walk+0x632/0x900 [ 50.446709] ? mas_walk+0x5c7/0x7c0 [ 50.447030] do_vmi_munmap+0x1f1/0x2b0 [ 50.447374] mmap_region+0x1f9/0x2660 [ 50.447705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.448046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.448541] ? __pfx_lock_acquire+0x10/0x10 [ 50.448897] ? __pfx_mmap_region+0x10/0x10 [ 50.449246] ? security_mmap_addr+0x7d/0xa0 [ 50.449597] ? get_unmapped_area+0x1f5/0x3f0 [ 50.449963] do_mmap+0x854/0xf00 [ 50.450271] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.450637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.451025] ksys_mmap_pgoff+0x3af/0x500 [ 50.451360] do_syscall_64+0x3f/0x90 [ 50.451702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.452162] RIP: 0033:0x7fead0026d82 [ 50.452530] 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 [ 50.453972] RSP: 002b:00007ffd2fe616a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.454599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fead0026d82 [ 50.455186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feacf460000 [ 50.455768] RBP: 00007feacf460000 R08: 0000000000000009 R09: 0000000000001000 [ 50.456356] R10: 0000000000000812 R11: 0000000000000206 R12: 000056043ac91b20 [ 50.456924] R13: 00007ffd2fe616c0 R14: 00007ffd2fe616f0 R15: 00007ffd2fe61a50 [ 50.457512] [ 50.457721] [ 50.457867] Allocated by task 220: [ 50.458170] kasan_save_stack+0x22/0x50 [ 50.458540] kasan_set_track+0x25/0x30 [ 50.458869] __kasan_slab_alloc+0x59/0x70 [ 50.459227] kmem_cache_alloc+0x16b/0x370 [ 50.459568] vm_area_dup+0x20/0x160 [ 50.459870] __split_vma+0x170/0x950 [ 50.460178] split_vma+0xc6/0x110 [ 50.460505] mprotect_fixup+0x8d2/0xb30 [ 50.460848] do_mprotect_pkey+0x87e/0xd40 [ 50.461192] __x64_sys_mprotect+0x78/0xc0 [ 50.461555] do_syscall_64+0x3f/0x90 [ 50.461888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.462324] [ 50.462471] Freed by task 220: [ 50.462729] kasan_save_stack+0x22/0x50 [ 50.463054] kasan_set_track+0x25/0x30 [ 50.463399] kasan_save_free_info+0x2b/0x50 [ 50.463742] __kasan_slab_free+0x10a/0x190 [ 50.464082] kmem_cache_free+0x10d/0x4d0 [ 50.464465] rcu_core+0x8c8/0x2860 [ 50.464755] __do_softirq+0x1b7/0x7d4 [ 50.465063] [ 50.465222] Last potentially related work creation: [ 50.465636] kasan_save_stack+0x22/0x50 [ 50.465962] __kasan_record_aux_stack+0x8e/0xa0 [ 50.466352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.466780] remove_vma+0x139/0x170 [ 50.467076] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.467438] do_vmi_munmap+0x1f1/0x2b0 [ 50.467747] __vm_munmap+0x138/0x3a0 [ 50.468046] __x64_sys_munmap+0x59/0x80 [ 50.468405] do_syscall_64+0x3f/0x90 [ 50.468712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.469130] [ 50.469281] The buggy address belongs to the object at ffff8880190ee2b8 [ 50.469281] which belongs to the cache vm_area_struct of size 168 [ 50.470254] The buggy address is located 88 bytes inside of [ 50.470254] freed 168-byte region [ffff8880190ee2b8, ffff8880190ee360) [ 50.471184] [ 50.471344] The buggy address belongs to the physical page: [ 50.471802] page:00000000ca705541 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x190ee [ 50.472586] memcg:ffff8880191a0201 [ 50.472889] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.473329] page_type: 0xffffffff() [ 50.473667] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.474272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191a0201 [ 50.474901] page dumped because: kasan: bad access detected [ 50.475357] [ 50.475508] Memory state around the buggy address: [ 50.475980] ffff8880190ee200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 50.476625] ffff8880190ee280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 50.477201] >ffff8880190ee300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 50.477788] ^ [ 50.478120] ffff8880190ee380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 50.478740] ffff8880190ee400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 50.479344] ================================================================== [ 50.480176] Disabling lock debugging due to kernel taint [ 52.354293] BUG: Bad rss-counter state mm:00000000470f219c type:MM_FILEPAGES val:33 [ 52.355027] BUG: Bad rss-counter state mm:00000000470f219c type:MM_ANONPAGES val:22 [ 52.736949] BUG: Bad rss-counter state mm:000000004440280c type:MM_FILEPAGES val:33 [ 52.737800] BUG: Bad rss-counter state mm:000000004440280c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1326' (ECDSA) to the list of known hosts. 2023/06/20 09:47:13 fuzzer started 2023/06/20 09:47:13 dialing manager at localhost:44161 2023/06/20 09:47:13 checking machine... 2023/06/20 09:47:13 checking revisions... [ 53.306949] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:47:14 testing simple program... [ 53.343329] cgroup: Unknown subsys name 'net' [ 53.405206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:02 Registers: info registers vcpu 0 RAX=ffffffff81749110 RBX=000000000000002d RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888016a4d000 RBP=000000000000002e RSP=ffff88806ce09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff888016a4d000 RIP=ffffffff81749114 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 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=00007f51d688cb80 CR3=000000000d71e000 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=8e682efd699d1187cd4160c4ee3d2236 XMM02=2c67c8bc2e329bc3000000000011d858 XMM03=fb795ef6d65770560000000000124218 XMM04=043cdda42fbd9a4f00000000000ae988 XMM05=16bbfc4fa606b6250000000000133ad8 XMM06=b504abdbeea3d9e30000000000132cb0 XMM07=e042d86d42eb936e00000000001244f0 XMM08=2f6dea8f40d8dff0000000000011d8b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800fb40001 RBX=ffff88800fb3fb50 RCX=0000000000000001 RDX=ffff88800fb3fb58 RSI=ffff88800fb3fb28 RDI=ffff88800fb3f558 RBP=ffff88800fb38000 RSP=ffff88800fb3f4d8 R8 =0000000000000001 R9 =ffff88800fb3f588 R10=0000000000038001 R11=000000000008a842 R12=ffff88800fb3f5a8 R13=ffff88800fb3f590 R14=ffff88800fb3fb28 R15=ffff88800fb3f548 RIP=ffffffff81131cd2 RFL=00000293 [--S-A-C] 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 00007fb894d82900 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=00007fff0013d000 CR3=000000001a12c000 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=563412feff00545000000000000080fe 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