[ 26.056284] BUG: Bad rss-counter state mm:0000000086c9379e type:MM_FILEPAGES val:33 [ 26.057487] BUG: Bad rss-counter state mm:0000000086c9379e type:MM_ANONPAGES val:22 [ 26.204308] ================================================================== [ 26.205232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.206180] Read of size 8 at addr ffff88800fcb1310 by task sshd/219 [ 26.207035] [ 26.207257] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.208143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.209134] Call Trace: [ 26.209456] [ 26.209743] dump_stack_lvl+0x91/0xf0 [ 26.210235] print_report+0xcc/0x620 [ 26.210719] ? __virt_addr_valid+0x102/0x340 [ 26.211274] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.211890] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.212530] kasan_report+0xbe/0xf0 [ 26.213009] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.213632] vma_interval_tree_remove+0xc75/0xec0 [ 26.214235] vma_prepare+0xc54/0x11a0 [ 26.214718] __split_vma+0x5af/0x950 [ 26.215190] ? __pfx___split_vma+0x10/0x10 [ 26.215739] ? find_held_lock+0x2c/0x110 [ 26.216290] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.216855] ? lock_is_held_type+0x9f/0x120 [ 26.217391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.217993] ? mtree_range_walk+0x632/0x900 [ 26.218542] ? mas_walk+0x5c7/0x7c0 [ 26.219015] do_vmi_munmap+0x1f1/0x2b0 [ 26.219509] mmap_region+0x1f9/0x2660 [ 26.219991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.220512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.221217] ? __pfx_lock_acquire+0x10/0x10 [ 26.221751] ? __pfx_mmap_region+0x10/0x10 [ 26.222288] ? security_mmap_addr+0x7d/0xa0 [ 26.222819] ? get_unmapped_area+0x1f5/0x3f0 [ 26.223374] do_mmap+0x854/0xf00 [ 26.223814] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.224370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.224941] ksys_mmap_pgoff+0x3af/0x500 [ 26.225456] do_syscall_64+0x3f/0x90 [ 26.225931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.226586] RIP: 0033:0x7fe47671cd82 [ 26.227043] 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 [ 26.229179] RSP: 002b:00007ffe91ec9c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.230085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe47671cd82 [ 26.230946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe475b56000 [ 26.231784] RBP: 00007fe475b56000 R08: 0000000000000009 R09: 0000000000001000 [ 26.232653] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568ae4ddb20 [ 26.233533] R13: 00007ffe91ec9c90 R14: 00007ffe91ec9cc0 R15: 00007ffe91eca020 [ 26.234424] [ 26.234724] [ 26.234945] Allocated by task 212: [ 26.235392] kasan_save_stack+0x22/0x50 [ 26.235921] kasan_set_track+0x25/0x30 [ 26.236441] __kasan_slab_alloc+0x59/0x70 [ 26.236994] kmem_cache_alloc+0x16b/0x370 [ 26.237534] vm_area_dup+0x20/0x160 [ 26.238008] __split_vma+0x170/0x950 [ 26.238497] split_vma+0xc6/0x110 [ 26.238962] mprotect_fixup+0x8d2/0xb30 [ 26.239481] do_mprotect_pkey+0x87e/0xd40 [ 26.240017] __x64_sys_mprotect+0x78/0xc0 [ 26.240576] do_syscall_64+0x3f/0x90 [ 26.241060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.241738] [ 26.241961] Freed by task 212: [ 26.242367] kasan_save_stack+0x22/0x50 [ 26.242891] kasan_set_track+0x25/0x30 [ 26.243408] kasan_save_free_info+0x2b/0x50 [ 26.243967] __kasan_slab_free+0x10a/0x190 [ 26.244537] kmem_cache_free+0x10d/0x4d0 [ 26.245072] rcu_core+0x8c8/0x2860 [ 26.245532] __do_softirq+0x1b7/0x7d4 [ 26.246026] [ 26.246255] Last potentially related work creation: [ 26.246868] kasan_save_stack+0x22/0x50 [ 26.247391] __kasan_record_aux_stack+0x8e/0xa0 [ 26.247992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.248672] remove_vma+0x139/0x170 [ 26.249145] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.249734] do_vmi_munmap+0x1f1/0x2b0 [ 26.250241] __vm_munmap+0x138/0x3a0 [ 26.250726] __x64_sys_munmap+0x59/0x80 [ 26.251249] do_syscall_64+0x3f/0x90 [ 26.251742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.252417] [ 26.252639] The buggy address belongs to the object at ffff88800fcb12b8 [ 26.252639] which belongs to the cache vm_area_struct of size 168 [ 26.254174] The buggy address is located 88 bytes inside of [ 26.254174] freed 168-byte region [ffff88800fcb12b8, ffff88800fcb1360) [ 26.255660] [ 26.255882] The buggy address belongs to the physical page: [ 26.256586] page:0000000037d79cd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcb1 [ 26.257728] memcg:ffff88800e329c01 [ 26.258181] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.258852] page_type: 0xffffffff() [ 26.259321] raw: 0100000000000200 ffff88800879fc80 ffffea00003f6480 dead000000000008 [ 26.260300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e329c01 [ 26.261259] page dumped because: kasan: bad access detected [ 26.261952] [ 26.262179] Memory state around the buggy address: [ 26.262781] ffff88800fcb1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 26.263687] ffff88800fcb1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 26.264601] >ffff88800fcb1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 26.265492] ^ [ 26.265989] ffff88800fcb1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.266890] ffff88800fcb1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 26.267775] ================================================================== [ 26.268879] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.489200] BUG: Bad rss-counter state mm:000000003df2705b type:MM_FILEPAGES val:33 [ 28.490251] BUG: Bad rss-counter state mm:000000003df2705b type:MM_ANONPAGES val:22 [ 29.018525] BUG: Bad rss-counter state mm:00000000e9728e35 type:MM_FILEPAGES val:33 [ 29.019672] BUG: Bad rss-counter state mm:00000000e9728e35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28119' (ECDSA) to the list of known hosts. 2023/06/20 06:01:55 fuzzer started 2023/06/20 06:01:55 dialing manager at localhost:44161 2023/06/20 06:01:55 checking machine... 2023/06/20 06:01:55 checking revisions... [ 29.712388] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:01:55 testing simple program... [ 29.755038] cgroup: Unknown subsys name 'net' [ 29.825404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:52 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff8880146b7c30 RSI=ffff8880146b7bf8 RDI=ffff8880146b74c0 RBP=ffff8880146b7548 RSP=ffff8880146b74a0 R8 =0000000000000001 R9 =ffff8880146b74f0 R10=0000000000038001 R11=000000000008a8aa R12=ffff8880146b7578 R13=0000000000000000 R14=ffff8880146c9b40 R15=ffff8880146b74b0 RIP=ffffffff81130937 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 00007ff8edf1c900 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=00007fd23966e650 CR3=000000000ee7e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0efeaf5e99506bba00000000000ae988 XMM05=5e8ac942cb1e9d3a0000000000135000 XMM06=806171799158d9670000000000133a80 XMM07=fb795ef6d65770560000000000124000 XMM08=4f5453444600273d67736d000d0a0920 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=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=00007ffd561fa5f8 CR3=000000000e63c000 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=2034353a31303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000