Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.824323] BUG: Bad rss-counter state mm:00000000ff8f942c type:MM_FILEPAGES val:33 [ 41.825028] BUG: Bad rss-counter state mm:00000000ff8f942c type:MM_ANONPAGES val:22 [ 41.877929] ================================================================== [ 41.885828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.887609] Read of size 8 at addr ffff88800cf6a310 by task sshd/220 [ 41.889321] [ 41.889692] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.891296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.893141] Call Trace: [ 41.893709] [ 41.894201] dump_stack_lvl+0x91/0xf0 [ 41.895045] print_report+0xcc/0x620 [ 41.895883] ? __virt_addr_valid+0x102/0x340 [ 41.896925] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.898015] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.899123] kasan_report+0xbe/0xf0 [ 41.899942] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.901114] vma_interval_tree_remove+0xc75/0xec0 [ 41.902221] vma_prepare+0xc54/0x11a0 [ 41.903104] __split_vma+0x5af/0x950 [ 41.903906] ? __pfx___split_vma+0x10/0x10 [ 41.904937] ? find_held_lock+0x2c/0x110 [ 41.905864] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.906929] ? lock_is_held_type+0x9f/0x120 [ 41.907912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.909151] ? mtree_range_walk+0x632/0x900 [ 41.910153] ? mas_walk+0x5c7/0x7c0 [ 41.910973] do_vmi_munmap+0x1f1/0x2b0 [ 41.911829] mmap_region+0x1f9/0x2660 [ 41.912704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.913630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.914988] ? __pfx_lock_acquire+0x10/0x10 [ 41.915955] ? __pfx_mmap_region+0x10/0x10 [ 41.916991] ? security_mmap_addr+0x7d/0xa0 [ 41.917948] ? get_unmapped_area+0x1f5/0x3f0 [ 41.918917] do_mmap+0x854/0xf00 [ 41.919672] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.920593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.921585] ksys_mmap_pgoff+0x3af/0x500 [ 41.922519] do_syscall_64+0x3f/0x90 [ 41.923400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.924606] RIP: 0033:0x7f4311b83d82 [ 41.925448] 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 [ 41.928813] RSP: 002b:00007ffcfc83f548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.929390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4311b83d82 [ 41.929918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4310fbd000 [ 41.930445] RBP: 00007f4310fbd000 R08: 0000000000000009 R09: 0000000000001000 [ 41.930976] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613d33aeec0 [ 41.931509] R13: 00007ffcfc83f560 R14: 00007ffcfc83f590 R15: 00007ffcfc83f8f0 [ 41.932068] [ 41.932328] [ 41.932467] Allocated by task 213: [ 41.932736] kasan_save_stack+0x22/0x50 [ 41.933063] kasan_set_track+0x25/0x30 [ 41.933373] __kasan_slab_alloc+0x59/0x70 [ 41.933703] kmem_cache_alloc+0x16b/0x370 [ 41.934055] vm_area_dup+0x20/0x160 [ 41.934338] __split_vma+0x170/0x950 [ 41.934631] split_vma+0xc6/0x110 [ 41.934924] mprotect_fixup+0x8d2/0xb30 [ 41.935269] do_mprotect_pkey+0x87e/0xd40 [ 41.935607] __x64_sys_mprotect+0x78/0xc0 [ 41.935982] do_syscall_64+0x3f/0x90 [ 41.936332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.936735] [ 41.936878] Freed by task 213: [ 41.937165] kasan_save_stack+0x22/0x50 [ 41.937483] kasan_set_track+0x25/0x30 [ 41.937801] kasan_save_free_info+0x2b/0x50 [ 41.938156] __kasan_slab_free+0x10a/0x190 [ 41.938489] kmem_cache_free+0x10d/0x4d0 [ 41.938806] rcu_core+0x8c8/0x2860 [ 41.939135] __do_softirq+0x1b7/0x7d4 [ 41.939437] [ 41.939579] Last potentially related work creation: [ 41.939943] kasan_save_stack+0x22/0x50 [ 41.940305] __kasan_record_aux_stack+0x8e/0xa0 [ 41.940668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.941105] remove_vma+0x139/0x170 [ 41.941387] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.941734] do_vmi_munmap+0x1f1/0x2b0 [ 41.942087] __vm_munmap+0x138/0x3a0 [ 41.942380] __x64_sys_munmap+0x59/0x80 [ 41.942694] do_syscall_64+0x3f/0x90 [ 41.942992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.943390] [ 41.943545] Second to last potentially related work creation: [ 41.944053] kasan_save_stack+0x22/0x50 [ 41.944401] __kasan_record_aux_stack+0x8e/0xa0 [ 41.944781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.945225] remove_vma+0x139/0x170 [ 41.945509] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.945914] do_vmi_munmap+0x1f1/0x2b0 [ 41.946267] mmap_region+0x1f9/0x2660 [ 41.946612] do_mmap+0x854/0xf00 [ 41.946953] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.947301] ksys_mmap_pgoff+0x3af/0x500 [ 41.947656] do_syscall_64+0x3f/0x90 [ 41.948268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.949643] [ 41.950032] The buggy address belongs to the object at ffff88800cf6a2b8 [ 41.950032] which belongs to the cache vm_area_struct of size 168 [ 41.953015] The buggy address is located 88 bytes inside of [ 41.953015] freed 168-byte region [ffff88800cf6a2b8, ffff88800cf6a360) [ 41.955963] [ 41.956499] The buggy address belongs to the physical page: [ 41.957817] page:00000000c9a31e63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf6a [ 41.960006] memcg:ffff88800f510601 [ 41.960849] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.962118] page_type: 0xffffffff() [ 41.962977] raw: 0100000000000200 ffff88800879fc80 ffffea00003d85c0 dead000000000006 [ 41.964787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f510601 [ 41.966650] page dumped because: kasan: bad access detected [ 41.967948] [ 41.968381] Memory state around the buggy address: [ 41.969519] ffff88800cf6a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.971147] ffff88800cf6a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.972813] >ffff88800cf6a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.974513] ^ [ 41.975437] ffff88800cf6a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.977113] ffff88800cf6a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.978765] ================================================================== [ 41.980577] Disabling lock debugging due to kernel taint [ 44.840609] BUG: Bad rss-counter state mm:00000000fed901e5 type:MM_FILEPAGES val:33 [ 44.841240] BUG: Bad rss-counter state mm:00000000fed901e5 type:MM_ANONPAGES val:22 [ 46.064776] BUG: Bad rss-counter state mm:00000000c579c6fa type:MM_FILEPAGES val:33 [ 46.065402] BUG: Bad rss-counter state mm:00000000c579c6fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25422' (ECDSA) to the list of known hosts. 2023/06/20 10:07:21 fuzzer started 2023/06/20 10:07:21 dialing manager at localhost:44161 2023/06/20 10:07:21 checking machine... 2023/06/20 10:07:21 checking revisions... [ 46.910699] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:07:21 testing simple program... [ 46.957444] cgroup: Unknown subsys name 'net' [ 47.050000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:10 Registers: info registers vcpu 0 RAX=1ffff11002b65889 RBX=00007f9577c8b000 RCX=0000000000000000 RDX=ffff888015ab8000 RSI=ffffffff8170b692 RDI=0000000000000006 RBP=00007f9577c89000 RSP=ffff88800ef77640 R8 =0000000000000006 R9 =00007f9577c89000 R10=00007f9577c8b000 R11=0000000000000001 R12=0000000000000000 R13=00007f9577c8a000 R14=ffff888015b2c448 R15=dffffc0000000000 RIP=ffffffff8170b6a4 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 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=00007f9577e24790 CR3=000000000e56a000 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=0000000000000018fffffffe7ffbfeff XMM01=dac3c8349edd9eb00000563d00000030 XMM02=0000000000000002b6fdff8535cffb16 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=5d7345beff9e6bed0000000000000000 XMM07=8f5b0d59231dd9550e4999f2f5990230 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806cf2b940 RBP=ffff88806cf2b940 RSP=ffff88806cf09f18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806cf09ff8 R12=0000000000000046 R13=ffff88806cf2b98c R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff812dffc4 RFL=00000086 [--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 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=00007f55442231a0 CR3=000000000c5d2000 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=37303a3031203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363335 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000