Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.204679] BUG: Bad rss-counter state mm:00000000d9329d63 type:MM_FILEPAGES val:33 [ 31.205911] BUG: Bad rss-counter state mm:00000000d9329d63 type:MM_ANONPAGES val:22 [ 31.243574] ================================================================== [ 31.244471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.245405] Read of size 8 at addr ffff88800d6d4310 by task sshd/219 [ 31.246405] [ 31.246626] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.247483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.248458] Call Trace: [ 31.248775] [ 31.249056] dump_stack_lvl+0x91/0xf0 [ 31.249557] print_report+0xcc/0x620 [ 31.250038] ? __virt_addr_valid+0x102/0x340 [ 31.250609] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251341] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252074] kasan_report+0xbe/0xf0 [ 31.252614] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253343] vma_interval_tree_remove+0xc75/0xec0 [ 31.254074] vma_prepare+0xc54/0x11a0 [ 31.254699] __split_vma+0x5af/0x950 [ 31.255266] ? __pfx___split_vma+0x10/0x10 [ 31.255796] ? find_held_lock+0x2c/0x110 [ 31.256309] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.256874] ? lock_is_held_type+0x9f/0x120 [ 31.257499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.258112] ? mtree_range_walk+0x632/0x900 [ 31.258759] ? mas_walk+0x5c7/0x7c0 [ 31.259324] do_vmi_munmap+0x1f1/0x2b0 [ 31.259928] mmap_region+0x1f9/0x2660 [ 31.260506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.261109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.261969] ? __pfx_lock_acquire+0x10/0x10 [ 31.262610] ? __pfx_mmap_region+0x10/0x10 [ 31.263136] ? security_mmap_addr+0x7d/0xa0 [ 31.263772] ? get_unmapped_area+0x1f5/0x3f0 [ 31.264496] do_mmap+0x854/0xf00 [ 31.264932] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.265433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.265994] ksys_mmap_pgoff+0x3af/0x500 [ 31.266502] do_syscall_64+0x3f/0x90 [ 31.267002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267917] RIP: 0033:0x7f40257e1d82 [ 31.268375] 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 [ 31.270837] RSP: 002b:00007ffc10dc18f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.271838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40257e1d82 [ 31.272856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4024c1b000 [ 31.273842] RBP: 00007f4024c1b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.274691] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac0f523d90 [ 31.275536] R13: 00007ffc10dc1910 R14: 00007ffc10dc1940 R15: 00007ffc10dc1ca0 [ 31.276389] [ 31.276679] [ 31.276892] Allocated by task 212: [ 31.277321] kasan_save_stack+0x22/0x50 [ 31.277824] kasan_set_track+0x25/0x30 [ 31.278321] __kasan_slab_alloc+0x59/0x70 [ 31.278843] kmem_cache_alloc+0x16b/0x370 [ 31.279361] vm_area_dup+0x20/0x160 [ 31.279815] __split_vma+0x170/0x950 [ 31.280281] split_vma+0xc6/0x110 [ 31.280724] mprotect_fixup+0x8d2/0xb30 [ 31.281226] do_mprotect_pkey+0x87e/0xd40 [ 31.281758] __x64_sys_mprotect+0x78/0xc0 [ 31.282276] do_syscall_64+0x3f/0x90 [ 31.282754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283395] [ 31.283611] Freed by task 13: [ 31.283988] kasan_save_stack+0x22/0x50 [ 31.284491] kasan_set_track+0x25/0x30 [ 31.284988] kasan_save_free_info+0x2b/0x50 [ 31.285529] __kasan_slab_free+0x10a/0x190 [ 31.286133] kmem_cache_free+0x10d/0x4d0 [ 31.286637] rcu_core+0x8c8/0x2860 [ 31.287080] __do_softirq+0x1b7/0x7d4 [ 31.287559] [ 31.287782] Last potentially related work creation: [ 31.288378] kasan_save_stack+0x22/0x50 [ 31.288903] __kasan_record_aux_stack+0x8e/0xa0 [ 31.289495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.290151] remove_vma+0x139/0x170 [ 31.290607] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.291158] do_vmi_munmap+0x1f1/0x2b0 [ 31.291661] __vm_munmap+0x138/0x3a0 [ 31.292128] __x64_sys_munmap+0x59/0x80 [ 31.292640] do_syscall_64+0x3f/0x90 [ 31.293130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293796] [ 31.294008] Second to last potentially related work creation: [ 31.294701] kasan_save_stack+0x22/0x50 [ 31.295201] __kasan_record_aux_stack+0x8e/0xa0 [ 31.295786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296433] remove_vma+0x139/0x170 [ 31.296881] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297443] do_vmi_munmap+0x1f1/0x2b0 [ 31.297928] mmap_region+0x1f9/0x2660 [ 31.298412] do_mmap+0x854/0xf00 [ 31.298850] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.299333] ksys_mmap_pgoff+0x3af/0x500 [ 31.299839] do_syscall_64+0x3f/0x90 [ 31.300315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300961] [ 31.301181] The buggy address belongs to the object at ffff88800d6d42b8 [ 31.301181] which belongs to the cache vm_area_struct of size 168 [ 31.302687] The buggy address is located 88 bytes inside of [ 31.302687] freed 168-byte region [ffff88800d6d42b8, ffff88800d6d4360) [ 31.304102] [ 31.304326] The buggy address belongs to the physical page: [ 31.305004] page:000000006f44efb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6d4 [ 31.306103] memcg:ffff88800cdd1501 [ 31.306530] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.307244] page_type: 0xffffffff() [ 31.307702] raw: 0100000000000200 ffff8880087a0c80 ffffea00003939c0 dead000000000003 [ 31.308618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cdd1501 [ 31.309548] page dumped because: kasan: bad access detected [ 31.310219] [ 31.310436] Memory state around the buggy address: [ 31.311027] ffff88800d6d4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.311886] ffff88800d6d4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.312754] >ffff88800d6d4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.313620] ^ [ 31.314093] ffff88800d6d4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.314959] ffff88800d6d4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.315824] ================================================================== [ 31.316758] Disabling lock debugging due to kernel taint [ 33.807082] BUG: Bad rss-counter state mm:00000000ebab8640 type:MM_FILEPAGES val:33 [ 33.808096] BUG: Bad rss-counter state mm:00000000ebab8640 type:MM_ANONPAGES val:22 [ 34.327204] BUG: Bad rss-counter state mm:000000000525b45b type:MM_FILEPAGES val:33 [ 34.328357] BUG: Bad rss-counter state mm:000000000525b45b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23328' (ECDSA) to the list of known hosts. 2023/06/20 18:50:04 fuzzer started 2023/06/20 18:50:05 dialing manager at localhost:36067 2023/06/20 18:50:05 checking machine... 2023/06/20 18:50:05 checking revisions... [ 35.023719] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:50:05 testing simple program... [ 35.062254] cgroup: Unknown subsys name 'net' [ 35.117912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880139a6720 RCX=ffff8880139a6720 RDX=00000000000d000c RSI=ffff8880139a6720 RDI=ffff88800844f780 RBP=ffff888016f47d58 RSP=ffff888016f47cc0 R8 =00000000000d000b R9 =0000000000000000 R10=ffffea00004e6980 R11=00000000000d000c R12=ffffea00004e6980 R13=ffff8880139a6be0 R14=00000000000d000b R15=ffff88800844f780 RIP=ffffffff81809672 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 00007fee77275900 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=00007fee7722901c CR3=00000000162e2000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc2151fd18 CR3=000000000cb26000 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=2034303a30353a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a30353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000