[ 32.384784] BUG: Bad rss-counter state mm:00000000e1f97148 type:MM_FILEPAGES val:33 [ 32.386057] BUG: Bad rss-counter state mm:00000000e1f97148 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.553517] ================================================================== [ 32.554443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.555393] Read of size 8 at addr ffff88800cba9310 by task sshd/220 [ 32.556183] [ 32.556410] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.557430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.558416] Call Trace: [ 32.558740] [ 32.559031] dump_stack_lvl+0x91/0xf0 [ 32.559697] print_report+0xcc/0x620 [ 32.560296] ? __virt_addr_valid+0x102/0x340 [ 32.560967] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.561727] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.562494] kasan_report+0xbe/0xf0 [ 32.563082] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.563865] vma_interval_tree_remove+0xc75/0xec0 [ 32.564610] vma_prepare+0xc54/0x11a0 [ 32.565198] __split_vma+0x5af/0x950 [ 32.565779] ? __pfx___split_vma+0x10/0x10 [ 32.566429] ? find_held_lock+0x2c/0x110 [ 32.567065] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.567775] ? lock_is_held_type+0x9f/0x120 [ 32.568421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.569030] ? mtree_range_walk+0x632/0x900 [ 32.569577] ? mas_walk+0x5c7/0x7c0 [ 32.570060] do_vmi_munmap+0x1f1/0x2b0 [ 32.570554] mmap_region+0x1f9/0x2660 [ 32.571032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.571541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.572266] ? __pfx_lock_acquire+0x10/0x10 [ 32.572794] ? __pfx_mmap_region+0x10/0x10 [ 32.573325] ? security_mmap_addr+0x7d/0xa0 [ 32.573862] ? get_unmapped_area+0x1f5/0x3f0 [ 32.574408] do_mmap+0x854/0xf00 [ 32.574859] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.575361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.575938] ksys_mmap_pgoff+0x3af/0x500 [ 32.576445] do_syscall_64+0x3f/0x90 [ 32.576927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.577585] RIP: 0033:0x7f3404333d82 [ 32.578043] 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 [ 32.580227] RSP: 002b:00007ffea3dda618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.581142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3404333d82 [ 32.581997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f340376d000 [ 32.582858] RBP: 00007f340376d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.583731] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563262303ec0 [ 32.584587] R13: 00007ffea3dda630 R14: 00007ffea3dda660 R15: 00007ffea3dda9c0 [ 32.585459] [ 32.585759] [ 32.585977] Allocated by task 213: [ 32.586411] kasan_save_stack+0x22/0x50 [ 32.586916] kasan_set_track+0x25/0x30 [ 32.587417] __kasan_slab_alloc+0x59/0x70 [ 32.587955] kmem_cache_alloc+0x16b/0x370 [ 32.588485] vm_area_dup+0x20/0x160 [ 32.588937] __split_vma+0x170/0x950 [ 32.589401] split_vma+0xc6/0x110 [ 32.589847] mprotect_fixup+0x8d2/0xb30 [ 32.590347] do_mprotect_pkey+0x87e/0xd40 [ 32.590868] __x64_sys_mprotect+0x78/0xc0 [ 32.591385] do_syscall_64+0x3f/0x90 [ 32.591873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.592511] [ 32.592729] Freed by task 13: [ 32.593107] kasan_save_stack+0x22/0x50 [ 32.593611] kasan_set_track+0x25/0x30 [ 32.594106] kasan_save_free_info+0x2b/0x50 [ 32.594637] __kasan_slab_free+0x10a/0x190 [ 32.595169] kmem_cache_free+0x10d/0x4d0 [ 32.595683] rcu_core+0x8c8/0x2860 [ 32.596129] __do_softirq+0x1b7/0x7d4 [ 32.596606] [ 32.596823] Last potentially related work creation: [ 32.597404] kasan_save_stack+0x22/0x50 [ 32.597907] __kasan_record_aux_stack+0x8e/0xa0 [ 32.598480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.599119] remove_vma+0x139/0x170 [ 32.599572] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.600138] do_vmi_munmap+0x1f1/0x2b0 [ 32.600625] __vm_munmap+0x138/0x3a0 [ 32.601090] __x64_sys_munmap+0x59/0x80 [ 32.601589] do_syscall_64+0x3f/0x90 [ 32.602066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.602707] [ 32.602926] Second to last potentially related work creation: [ 32.603604] kasan_save_stack+0x22/0x50 [ 32.604128] __kasan_record_aux_stack+0x8e/0xa0 [ 32.604696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.605344] remove_vma+0x139/0x170 [ 32.605797] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.606355] do_vmi_munmap+0x1f1/0x2b0 [ 32.606841] mmap_region+0x1f9/0x2660 [ 32.607322] do_mmap+0x854/0xf00 [ 32.607762] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.608246] ksys_mmap_pgoff+0x3af/0x500 [ 32.608747] do_syscall_64+0x3f/0x90 [ 32.609219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.609858] [ 32.610074] The buggy address belongs to the object at ffff88800cba92b8 [ 32.610074] which belongs to the cache vm_area_struct of size 168 [ 32.611593] The buggy address is located 88 bytes inside of [ 32.611593] freed 168-byte region [ffff88800cba92b8, ffff88800cba9360) [ 32.613046] [ 32.613273] The buggy address belongs to the physical page: [ 32.613934] page:00000000085cf334 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcba9 [ 32.615076] memcg:ffff88800e6a8501 [ 32.615507] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.616245] page_type: 0xffffffff() [ 32.616708] raw: 0100000000000200 ffff88800879fc80 ffffea00006704c0 0000000000000005 [ 32.617629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6a8501 [ 32.618533] page dumped because: kasan: bad access detected [ 32.619189] [ 32.619405] Memory state around the buggy address: [ 32.620006] ffff88800cba9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.620863] ffff88800cba9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.621710] >ffff88800cba9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.622565] ^ [ 32.623029] ffff88800cba9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.623907] ffff88800cba9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.624757] ================================================================== [ 32.626112] Disabling lock debugging due to kernel taint [ 34.607755] BUG: Bad rss-counter state mm:0000000037b16008 type:MM_FILEPAGES val:33 [ 34.608786] BUG: Bad rss-counter state mm:0000000037b16008 type:MM_ANONPAGES val:22 [ 35.084884] BUG: Bad rss-counter state mm:00000000c303b20e type:MM_FILEPAGES val:33 [ 35.085919] BUG: Bad rss-counter state mm:00000000c303b20e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43349' (ECDSA) to the list of known hosts. 2023/06/19 11:28:31 fuzzer started 2023/06/19 11:28:31 dialing manager at localhost:44161 2023/06/19 11:28:31 checking machine... 2023/06/19 11:28:31 checking revisions... [ 35.746568] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:28:32 testing simple program... [ 35.785047] cgroup: Unknown subsys name 'net' [ 35.848636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:28:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9c135a RDX=dffffc0000000000 RSI=ffffffff813782a8 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000244c3 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130706 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 00007f1d6e3af700 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=00007f65aa2f80b0 CR3=000000000e19c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031333a3832 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323235 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=fffffbfff0ba77db RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800f017428 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000b9900000b99 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8180efaf 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 00007f65a9d40900 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=00007f65aa2f7618 CR3=000000001599a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000