syzkaller login: [ 33.281402] BUG: Bad rss-counter state mm:00000000f5de8539 type:MM_FILEPAGES val:33 [ 33.282470] BUG: Bad rss-counter state mm:00000000f5de8539 type:MM_ANONPAGES val:22 [ 33.408647] ================================================================== [ 33.409361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.410084] Read of size 8 at addr ffff88800e0f1880 by task sshd/220 [ 33.410674] [ 33.410841] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.411507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.412462] Call Trace: [ 33.412708] [ 33.412929] dump_stack_lvl+0x91/0xf0 [ 33.413305] print_report+0xcc/0x620 [ 33.413691] ? __virt_addr_valid+0x102/0x340 [ 33.414121] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.414787] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.415604] kasan_report+0xbe/0xf0 [ 33.416175] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.416921] vma_interval_tree_remove+0xc75/0xec0 [ 33.417695] vma_prepare+0xc54/0x11a0 [ 33.418283] __split_vma+0x5af/0x950 [ 33.418870] ? __pfx___split_vma+0x10/0x10 [ 33.419518] ? find_held_lock+0x2c/0x110 [ 33.420155] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.420853] ? lock_is_held_type+0x9f/0x120 [ 33.421544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.422200] ? mtree_range_walk+0x632/0x900 [ 33.422800] ? mas_walk+0x5c7/0x7c0 [ 33.423309] do_vmi_munmap+0x1f1/0x2b0 [ 33.423846] mmap_region+0x1f9/0x2660 [ 33.424370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.424949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.425730] ? __pfx_lock_acquire+0x10/0x10 [ 33.426264] ? __pfx_mmap_region+0x10/0x10 [ 33.426797] ? security_mmap_addr+0x7d/0xa0 [ 33.427327] ? get_unmapped_area+0x1f5/0x3f0 [ 33.427885] do_mmap+0x854/0xf00 [ 33.428332] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.428837] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.429432] ksys_mmap_pgoff+0x3af/0x500 [ 33.429940] do_syscall_64+0x3f/0x90 [ 33.430422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.431076] RIP: 0033:0x7f8cf571ad82 [ 33.431539] 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 [ 33.433686] RSP: 002b:00007ffc223f7618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.434604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cf571ad82 [ 33.435461] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cf4b54000 [ 33.436316] RBP: 00007f8cf4b54000 R08: 0000000000000009 R09: 0000000000001000 [ 33.437176] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564ebad5ec0 [ 33.438037] R13: 00007ffc223f7630 R14: 00007ffc223f7660 R15: 00007ffc223f79c0 [ 33.438894] [ 33.439194] [ 33.439409] Allocated by task 213: [ 33.439854] kasan_save_stack+0x22/0x50 [ 33.440356] kasan_set_track+0x25/0x30 [ 33.440850] __kasan_slab_alloc+0x59/0x70 [ 33.441397] kmem_cache_alloc+0x16b/0x370 [ 33.441919] vm_area_dup+0x20/0x160 [ 33.442377] __split_vma+0x170/0x950 [ 33.442840] split_vma+0xc6/0x110 [ 33.443283] mprotect_fixup+0x8d2/0xb30 [ 33.443790] do_mprotect_pkey+0x87e/0xd40 [ 33.444308] __x64_sys_mprotect+0x78/0xc0 [ 33.444847] do_syscall_64+0x3f/0x90 [ 33.445331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.445971] [ 33.446190] Freed by task 213: [ 33.446580] kasan_save_stack+0x22/0x50 [ 33.447083] kasan_set_track+0x25/0x30 [ 33.447583] kasan_save_free_info+0x2b/0x50 [ 33.448130] __kasan_slab_free+0x10a/0x190 [ 33.448663] kmem_cache_free+0x10d/0x4d0 [ 33.449212] rcu_core+0x8c8/0x2860 [ 33.449685] __do_softirq+0x1b7/0x7d4 [ 33.450188] [ 33.450404] Last potentially related work creation: [ 33.450995] kasan_save_stack+0x22/0x50 [ 33.451508] __kasan_record_aux_stack+0x8e/0xa0 [ 33.452091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.452739] remove_vma+0x139/0x170 [ 33.453292] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.453872] do_vmi_munmap+0x1f1/0x2b0 [ 33.454363] __vm_munmap+0x138/0x3a0 [ 33.454837] __x64_sys_munmap+0x59/0x80 [ 33.455331] do_syscall_64+0x3f/0x90 [ 33.455804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.456450] [ 33.456666] The buggy address belongs to the object at ffff88800e0f1828 [ 33.456666] which belongs to the cache vm_area_struct of size 168 [ 33.458163] The buggy address is located 88 bytes inside of [ 33.458163] freed 168-byte region [ffff88800e0f1828, ffff88800e0f18d0) [ 33.459609] [ 33.459832] The buggy address belongs to the physical page: [ 33.460501] page:00000000e5a91a31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f1 [ 33.461588] memcg:ffff888016906301 [ 33.462027] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.462688] page_type: 0xffffffff() [ 33.463138] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.464067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016906301 [ 33.464965] page dumped because: kasan: bad access detected [ 33.465627] [ 33.465852] Memory state around the buggy address: [ 33.466428] ffff88800e0f1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.467280] ffff88800e0f1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.468128] >ffff88800e0f1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.468979] ^ [ 33.469401] ffff88800e0f1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.470241] ffff88800e0f1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.471078] ================================================================== [ 33.472016] Disabling lock debugging due to kernel taint [ 36.467799] BUG: Bad rss-counter state mm:000000008ee458a6 type:MM_FILEPAGES val:33 [ 36.468729] BUG: Bad rss-counter state mm:000000008ee458a6 type:MM_ANONPAGES val:22 [ 36.917666] BUG: Bad rss-counter state mm:0000000005a7ff51 type:MM_FILEPAGES val:33 [ 36.919240] BUG: Bad rss-counter state mm:0000000005a7ff51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42478' (ECDSA) to the list of known hosts. 2023/06/19 14:23:23 fuzzer started 2023/06/19 14:23:24 dialing manager at localhost:44161 2023/06/19 14:23:24 checking machine... 2023/06/19 14:23:24 checking revisions... [ 37.699527] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:23:24 testing simple program... [ 37.749140] cgroup: Unknown subsys name 'net' [ 37.804328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:23:21 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff836518d1 RDX=ffff888019603680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888019603680 RSP=ffff8880158ffd28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff87f9478c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff814c07eb 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 00007fc0548aa900 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=00007ffc1803e000 CR3=000000000e588000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f28aad45660 CR3=0000000018fc4000 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=33323a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000