Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.097242] BUG: Bad rss-counter state mm:00000000948adc9b type:MM_FILEPAGES val:33 [ 30.098012] BUG: Bad rss-counter state mm:00000000948adc9b type:MM_ANONPAGES val:22 [ 30.251574] ================================================================== [ 30.252211] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.252805] Read of size 8 at addr ffff88800eadadf0 by task sshd/219 [ 30.253323] [ 30.253463] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.254010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.254619] Call Trace: [ 30.254819] [ 30.255010] dump_stack_lvl+0x91/0xf0 [ 30.255330] print_report+0xcc/0x620 [ 30.255656] ? __virt_addr_valid+0x102/0x340 [ 30.256025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256429] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256823] kasan_report+0xbe/0xf0 [ 30.257151] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.257919] vma_interval_tree_remove+0xc75/0xec0 [ 30.258316] vma_prepare+0xc54/0x11a0 [ 30.258622] __split_vma+0x5af/0x950 [ 30.258919] ? __pfx___split_vma+0x10/0x10 [ 30.259261] ? find_held_lock+0x2c/0x110 [ 30.259604] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.259970] ? lock_is_held_type+0x9f/0x120 [ 30.260315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.260691] ? mtree_range_walk+0x632/0x900 [ 30.261051] ? mas_walk+0x5c7/0x7c0 [ 30.261373] do_vmi_munmap+0x1f1/0x2b0 [ 30.261688] mmap_region+0x1f9/0x2660 [ 30.262000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.262333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.262793] ? __pfx_lock_acquire+0x10/0x10 [ 30.263139] ? __pfx_mmap_region+0x10/0x10 [ 30.263480] ? security_mmap_addr+0x7d/0xa0 [ 30.263825] ? get_unmapped_area+0x1f5/0x3f0 [ 30.264180] do_mmap+0x854/0xf00 [ 30.264468] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.264795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.265199] ksys_mmap_pgoff+0x3af/0x500 [ 30.265528] do_syscall_64+0x3f/0x90 [ 30.265841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.266259] RIP: 0033:0x7f23160e5d82 [ 30.266558] 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 [ 30.267899] RSP: 002b:00007ffd964ab8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.268473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23160e5d82 [ 30.269013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f231551f000 [ 30.269583] RBP: 00007f231551f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.270124] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625ce6a5ec0 [ 30.270642] R13: 00007ffd964ab8f0 R14: 00007ffd964ab920 R15: 00007ffd964abc80 [ 30.271195] [ 30.271387] [ 30.271526] Allocated by task 211: [ 30.271806] kasan_save_stack+0x22/0x50 [ 30.272145] kasan_set_track+0x25/0x30 [ 30.272453] __kasan_slab_alloc+0x59/0x70 [ 30.272789] kmem_cache_alloc+0x16b/0x370 [ 30.273146] vm_area_dup+0x20/0x160 [ 30.273445] __split_vma+0x170/0x950 [ 30.273741] split_vma+0xc6/0x110 [ 30.274030] mprotect_fixup+0x8d2/0xb30 [ 30.274346] do_mprotect_pkey+0x87e/0xd40 [ 30.274693] __x64_sys_mprotect+0x78/0xc0 [ 30.275040] do_syscall_64+0x3f/0x90 [ 30.275349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.275755] [ 30.275889] Freed by task 211: [ 30.276150] kasan_save_stack+0x22/0x50 [ 30.276481] kasan_set_track+0x25/0x30 [ 30.276802] kasan_save_free_info+0x2b/0x50 [ 30.277181] __kasan_slab_free+0x10a/0x190 [ 30.277517] kmem_cache_free+0x10d/0x4d0 [ 30.277833] rcu_core+0x8c8/0x2860 [ 30.278123] __do_softirq+0x1b7/0x7d4 [ 30.278435] [ 30.278577] Last potentially related work creation: [ 30.278950] kasan_save_stack+0x22/0x50 [ 30.279267] __kasan_record_aux_stack+0x8e/0xa0 [ 30.279622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.280042] remove_vma+0x139/0x170 [ 30.280337] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.280697] do_vmi_munmap+0x1f1/0x2b0 [ 30.281005] __vm_munmap+0x138/0x3a0 [ 30.281325] __x64_sys_munmap+0x59/0x80 [ 30.281658] do_syscall_64+0x3f/0x90 [ 30.281975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.282392] [ 30.282533] Second to last potentially related work creation: [ 30.282967] kasan_save_stack+0x22/0x50 [ 30.283286] __kasan_record_aux_stack+0x8e/0xa0 [ 30.283640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.284032] remove_vma+0x139/0x170 [ 30.284305] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.284657] do_vmi_munmap+0x1f1/0x2b0 [ 30.284973] mmap_region+0x1f9/0x2660 [ 30.285319] do_mmap+0x854/0xf00 [ 30.285602] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.285922] ksys_mmap_pgoff+0x3af/0x500 [ 30.286249] do_syscall_64+0x3f/0x90 [ 30.286561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286977] [ 30.287121] The buggy address belongs to the object at ffff88800eadad98 [ 30.287121] which belongs to the cache vm_area_struct of size 168 [ 30.288048] The buggy address is located 88 bytes inside of [ 30.288048] freed 168-byte region [ffff88800eadad98, ffff88800eadae40) [ 30.288937] [ 30.289091] The buggy address belongs to the physical page: [ 30.289507] page:00000000f2f5fafa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeada [ 30.290203] memcg:ffff88800e16cb01 [ 30.290473] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.290886] page_type: 0xffffffff() [ 30.291160] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b8340 dead000000000004 [ 30.291728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e16cb01 [ 30.292315] page dumped because: kasan: bad access detected [ 30.292745] [ 30.292883] Memory state around the buggy address: [ 30.293292] ffff88800eadac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.293831] ffff88800eadad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.294384] >ffff88800eadad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.294929] ^ [ 30.295427] ffff88800eadae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.295975] ffff88800eadae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.296525] ================================================================== [ 30.297261] Disabling lock debugging due to kernel taint [ 35.423456] BUG: Bad rss-counter state mm:00000000e211600e type:MM_FILEPAGES val:33 [ 35.424128] BUG: Bad rss-counter state mm:00000000e211600e type:MM_ANONPAGES val:22 [ 36.569432] BUG: Bad rss-counter state mm:000000006425e767 type:MM_FILEPAGES val:33 [ 36.570115] BUG: Bad rss-counter state mm:000000006425e767 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29233' (ECDSA) to the list of known hosts. 2023/06/21 08:10:07 fuzzer started 2023/06/21 08:10:07 dialing manager at localhost:36067 2023/06/21 08:10:08 checking machine... 2023/06/21 08:10:08 checking revisions... [ 37.490452] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:10:08 testing simple program... [ 37.543594] cgroup: Unknown subsys name 'net' [ 37.607175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:10:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f10c3de0328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806cf09d18 RSP=ffff88806cf09c50 R8 =0000000000000001 R9 =ffffed100d9e1396 R10=ffff88806cf09cb7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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=0000557eb4fab8a0 CR3=0000000009088000 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=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000