syzkaller login: [ 25.167761] BUG: Bad rss-counter state mm:000000004263f66b type:MM_FILEPAGES val:33 [ 25.169023] BUG: Bad rss-counter state mm:000000004263f66b type:MM_ANONPAGES val:22 [ 25.342911] ================================================================== [ 25.343844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.344812] Read of size 8 at addr ffff88800ddaa310 by task sshd/218 [ 25.345585] [ 25.345807] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.346986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.348012] Call Trace: [ 25.348366] [ 25.348701] dump_stack_lvl+0x91/0xf0 [ 25.349249] print_report+0xcc/0x620 [ 25.349848] ? __virt_addr_valid+0x102/0x340 [ 25.350508] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.351269] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.352028] kasan_report+0xbe/0xf0 [ 25.352643] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.353441] vma_interval_tree_remove+0xc75/0xec0 [ 25.354255] vma_prepare+0xc54/0x11a0 [ 25.354900] __split_vma+0x5af/0x950 [ 25.355535] ? __pfx___split_vma+0x10/0x10 [ 25.356250] ? find_held_lock+0x2c/0x110 [ 25.356981] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.357589] ? lock_is_held_type+0x9f/0x120 [ 25.358161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.358822] ? mtree_range_walk+0x632/0x900 [ 25.359407] ? mas_walk+0x5c7/0x7c0 [ 25.359922] do_vmi_munmap+0x1f1/0x2b0 [ 25.360456] mmap_region+0x1f9/0x2660 [ 25.360991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.361540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.362320] ? __pfx_lock_acquire+0x10/0x10 [ 25.362899] ? __pfx_mmap_region+0x10/0x10 [ 25.363468] ? security_mmap_addr+0x7d/0xa0 [ 25.364043] ? get_unmapped_area+0x1f5/0x3f0 [ 25.364678] do_mmap+0x854/0xf00 [ 25.365149] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.365690] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.366287] ksys_mmap_pgoff+0x3af/0x500 [ 25.366842] do_syscall_64+0x3f/0x90 [ 25.367353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.368053] RIP: 0033:0x7f0036a36d82 [ 25.368579] 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 [ 25.370914] RSP: 002b:00007ffe8757b6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.371892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0036a36d82 [ 25.372832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0035e70000 [ 25.373756] RBP: 00007f0035e70000 R08: 0000000000000009 R09: 0000000000001000 [ 25.374670] R10: 0000000000000812 R11: 0000000000000206 R12: 000055675aabff70 [ 25.375589] R13: 00007ffe8757b6c0 R14: 00007ffe8757b6f0 R15: 00007ffe8757ba50 [ 25.376528] [ 25.376860] [ 25.377093] Allocated by task 211: [ 25.377556] kasan_save_stack+0x22/0x50 [ 25.378101] kasan_set_track+0x25/0x30 [ 25.378646] __kasan_slab_alloc+0x59/0x70 [ 25.379208] kmem_cache_alloc+0x16b/0x370 [ 25.379777] vm_area_dup+0x20/0x160 [ 25.380264] __split_vma+0x170/0x950 [ 25.380790] split_vma+0xc6/0x110 [ 25.381261] mprotect_fixup+0x8d2/0xb30 [ 25.381815] do_mprotect_pkey+0x87e/0xd40 [ 25.382374] __x64_sys_mprotect+0x78/0xc0 [ 25.382938] do_syscall_64+0x3f/0x90 [ 25.383466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.384156] [ 25.384397] Freed by task 211: [ 25.384842] kasan_save_stack+0x22/0x50 [ 25.385375] kasan_set_track+0x25/0x30 [ 25.385911] kasan_save_free_info+0x2b/0x50 [ 25.386475] __kasan_slab_free+0x10a/0x190 [ 25.387247] kmem_cache_free+0x10d/0x4d0 [ 25.387824] rcu_core+0x8c8/0x2860 [ 25.388301] __do_softirq+0x1b7/0x7d4 [ 25.388855] [ 25.389079] Last potentially related work creation: [ 25.389712] kasan_save_stack+0x22/0x50 [ 25.390243] __kasan_record_aux_stack+0x8e/0xa0 [ 25.390847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.391523] remove_vma+0x139/0x170 [ 25.391996] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.392591] do_vmi_munmap+0x1f1/0x2b0 [ 25.393091] __vm_munmap+0x138/0x3a0 [ 25.393574] __x64_sys_munmap+0x59/0x80 [ 25.394083] do_syscall_64+0x3f/0x90 [ 25.394578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.395224] [ 25.395441] The buggy address belongs to the object at ffff88800ddaa2b8 [ 25.395441] which belongs to the cache vm_area_struct of size 168 [ 25.396981] The buggy address is located 88 bytes inside of [ 25.396981] freed 168-byte region [ffff88800ddaa2b8, ffff88800ddaa360) [ 25.398419] [ 25.398648] The buggy address belongs to the physical page: [ 25.399323] page:00000000d284dfc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddaa [ 25.400498] memcg:ffff88800d1fda01 [ 25.400971] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.401719] page_type: 0xffffffff() [ 25.402197] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 25.403148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1fda01 [ 25.404074] page dumped because: kasan: bad access detected [ 25.404784] [ 25.405002] Memory state around the buggy address: [ 25.405602] ffff88800ddaa200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.406470] ffff88800ddaa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.407349] >ffff88800ddaa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.408224] ^ [ 25.408740] ffff88800ddaa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 25.409627] ffff88800ddaa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.410488] ================================================================== [ 25.411466] Disabling lock debugging due to kernel taint [ 28.212679] BUG: Bad rss-counter state mm:00000000f639e78d type:MM_FILEPAGES val:33 [ 28.213704] BUG: Bad rss-counter state mm:00000000f639e78d type:MM_ANONPAGES val:22 [ 28.764213] BUG: Bad rss-counter state mm:00000000e7368451 type:MM_FILEPAGES val:33 [ 28.765417] BUG: Bad rss-counter state mm:00000000e7368451 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15934' (ECDSA) to the list of known hosts. 2023/06/19 11:06:38 fuzzer started 2023/06/19 11:06:38 dialing manager at localhost:44161 2023/06/19 11:06:38 checking machine... 2023/06/19 11:06:38 checking revisions... [ 29.385023] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:06:38 testing simple program... [ 29.436489] cgroup: Unknown subsys name 'net' [ 29.472574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801cdb3e00 RCX=ffff88801cdb3000 RDX=0000000000000080 RSI=ffff88801cdb3d10 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888008d7fca0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea000068b100 R14=ffffffff813782a8 R15=ffff88801a2c4da8 RIP=ffffffff8180ee70 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 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=00007f7520ad40b0 CR3=000000000e510000 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=36303a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323531 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016847520 RCX=0000000000000004 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff8880168474d0 RBP=ffff888016623680 RSP=ffff888016847430 R8 =0000000000000100 R9 =0000000000000000 R10=ffff888016847488 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880168474b0 R14=ffff888016623680 R15=ffff888016847488 RIP=ffffffff8450d442 RFL=00000202 [-------] 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 00007fe72bfff700 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=00007fb4cf1c4600 CR3=000000000e510000 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=2038333a36303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000