[ 24.134282] BUG: Bad rss-counter state mm:00000000c37272c3 type:MM_FILEPAGES val:33 [ 24.135653] BUG: Bad rss-counter state mm:00000000c37272c3 type:MM_ANONPAGES val:22 [ 24.306317] ================================================================== [ 24.307395] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.308513] Read of size 8 at addr ffff888016edb310 by task sshd/220 [ 24.309564] [ 24.309849] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.310901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.311980] Call Trace: [ 24.312314] [ 24.312623] dump_stack_lvl+0x91/0xf0 [ 24.313167] print_report+0xcc/0x620 [ 24.313691] ? __virt_addr_valid+0x102/0x340 [ 24.314287] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.314960] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.315618] kasan_report+0xbe/0xf0 [ 24.316132] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.316810] vma_interval_tree_remove+0xc75/0xec0 [ 24.317448] vma_prepare+0xc54/0x11a0 [ 24.317966] __split_vma+0x5af/0x950 [ 24.318488] ? __pfx___split_vma+0x10/0x10 [ 24.319061] ? find_held_lock+0x2c/0x110 [ 24.319647] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.320254] ? lock_is_held_type+0x9f/0x120 [ 24.320854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.321502] ? mtree_range_walk+0x632/0x900 [ 24.322158] ? mas_walk+0x5c7/0x7c0 [ 24.322704] do_vmi_munmap+0x1f1/0x2b0 [ 24.323245] mmap_region+0x1f9/0x2660 [ 24.323781] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.324333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.325125] ? __pfx_lock_acquire+0x10/0x10 [ 24.325734] ? __pfx_mmap_region+0x10/0x10 [ 24.326326] ? security_mmap_addr+0x7d/0xa0 [ 24.326934] ? get_unmapped_area+0x1f5/0x3f0 [ 24.327585] do_mmap+0x854/0xf00 [ 24.328095] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.328655] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.329265] ksys_mmap_pgoff+0x3af/0x500 [ 24.329807] do_syscall_64+0x3f/0x90 [ 24.330338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.331039] RIP: 0033:0x7fdf64070d82 [ 24.331538] 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 [ 24.333832] RSP: 002b:00007ffce0351688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.334818] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf64070d82 [ 24.335725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf634aa000 [ 24.336629] RBP: 00007fdf634aa000 R08: 0000000000000009 R09: 0000000000001000 [ 24.337535] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf98636ec0 [ 24.338467] R13: 00007ffce03516a0 R14: 00007ffce03516d0 R15: 00007ffce0351a30 [ 24.339385] [ 24.339696] [ 24.339924] Allocated by task 213: [ 24.340391] kasan_save_stack+0x22/0x50 [ 24.340930] kasan_set_track+0x25/0x30 [ 24.341467] __kasan_slab_alloc+0x59/0x70 [ 24.342040] kmem_cache_alloc+0x16b/0x370 [ 24.342610] vm_area_dup+0x20/0x160 [ 24.343105] __split_vma+0x170/0x950 [ 24.343610] split_vma+0xc6/0x110 [ 24.344091] mprotect_fixup+0x8d2/0xb30 [ 24.344635] do_mprotect_pkey+0x87e/0xd40 [ 24.345207] __x64_sys_mprotect+0x78/0xc0 [ 24.345776] do_syscall_64+0x3f/0x90 [ 24.346311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.347052] [ 24.347305] Freed by task 213: [ 24.347757] kasan_save_stack+0x22/0x50 [ 24.348338] kasan_set_track+0x25/0x30 [ 24.348899] kasan_save_free_info+0x2b/0x50 [ 24.349517] __kasan_slab_free+0x10a/0x190 [ 24.350247] kmem_cache_free+0x10d/0x4d0 [ 24.350838] rcu_core+0x8c8/0x2860 [ 24.351356] __do_softirq+0x1b7/0x7d4 [ 24.351899] [ 24.352150] Last potentially related work creation: [ 24.352823] kasan_save_stack+0x22/0x50 [ 24.353401] __kasan_record_aux_stack+0x8e/0xa0 [ 24.354061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.354827] remove_vma+0x139/0x170 [ 24.355342] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.355985] do_vmi_munmap+0x1f1/0x2b0 [ 24.356543] __vm_munmap+0x138/0x3a0 [ 24.357086] __x64_sys_munmap+0x59/0x80 [ 24.357659] do_syscall_64+0x3f/0x90 [ 24.358207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.358914] [ 24.359149] The buggy address belongs to the object at ffff888016edb2b8 [ 24.359149] which belongs to the cache vm_area_struct of size 168 [ 24.360755] The buggy address is located 88 bytes inside of [ 24.360755] freed 168-byte region [ffff888016edb2b8, ffff888016edb360) [ 24.362315] [ 24.362554] The buggy address belongs to the physical page: [ 24.363276] page:00000000db43c024 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16edb [ 24.364438] memcg:ffff88800df74101 [ 24.364894] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.365588] page_type: 0xffffffff() [ 24.366076] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.367168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df74101 [ 24.368216] page dumped because: kasan: bad access detected [ 24.368975] [ 24.369227] Memory state around the buggy address: [ 24.369892] ffff888016edb200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.370885] ffff888016edb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.371879] >ffff888016edb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.372848] ^ [ 24.373377] ffff888016edb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.374373] ffff888016edb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.375301] ================================================================== [ 24.376464] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.927558] BUG: Bad rss-counter state mm:000000009ef493a8 type:MM_FILEPAGES val:33 [ 26.928719] BUG: Bad rss-counter state mm:000000009ef493a8 type:MM_ANONPAGES val:22 [ 27.283374] BUG: Bad rss-counter state mm:00000000942bf650 type:MM_FILEPAGES val:33 [ 27.284562] BUG: Bad rss-counter state mm:00000000942bf650 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7813' (ECDSA) to the list of known hosts. 2023/06/21 03:28:14 fuzzer started 2023/06/21 03:28:14 dialing manager at localhost:36067 2023/06/21 03:28:14 checking machine... 2023/06/21 03:28:14 checking revisions... [ 27.880897] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:28:15 testing simple program... [ 27.928999] cgroup: Unknown subsys name 'net' [ 28.023837] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:28:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fd99000 RCX=ffff8880087a0dc0 RDX=ffffea000058ac00 RSI=ffff88800fd56bc8 RDI=ffff8880087a0c80 RBP=0000000000000000 RSP=ffff88800d9677b8 R8 =ffff8880162b0948 R9 =0000000000000000 R10=ffffea00003f5580 R11=000000008011000e R12=dffffc0000000000 R13=ffff88800d9677f8 R14=ffff8880087a0dc0 R15=ffff88800fd56bc8 RIP=ffffffff81810316 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 00007f4f15975900 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=00007f4f14dd7310 CR3=000000000ebc8000 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=e64c9161c90a6ccb00000000000ae988 XMM05=32ec8a7cc8f2c9590000000000131cc0 XMM06=4fda316b135da52b00000000001309f0 XMM07=fb795ef6d65770560000000000120d38 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801a31e528 RCX=1ffff11003463cac RDX=1ffff11002c74bd6 RSI=ffff88800ded7700 RDI=ffff8880163a5eb0 RBP=ffff88801a31e530 RSP=ffff88800f037380 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880163a5ea8 R13=0000000000000000 R14=ffff8880163a5e88 R15=ffff8880163a5e40 RIP=ffffffff81847713 RFL=00000046 [---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 00007fdd46515900 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=00007fdd464f4020 CR3=00000000169b8000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000