[ 38.892430] BUG: Bad rss-counter state mm:000000005c7a75bc type:MM_FILEPAGES val:33 [ 38.893409] BUG: Bad rss-counter state mm:000000005c7a75bc type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.059343] ================================================================== [ 39.060238] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.061159] Read of size 8 at addr ffff88800f69d798 by task sshd/220 [ 39.062068] [ 39.062297] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.063167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.064126] Call Trace: [ 39.064439] [ 39.064718] dump_stack_lvl+0x91/0xf0 [ 39.065199] print_report+0xcc/0x620 [ 39.065675] ? __virt_addr_valid+0x102/0x340 [ 39.066217] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.066819] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.067440] kasan_report+0xbe/0xf0 [ 39.067916] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.068543] vma_interval_tree_remove+0xc75/0xec0 [ 39.069162] vma_prepare+0xc54/0x11a0 [ 39.069654] __split_vma+0x5af/0x950 [ 39.070143] ? __pfx___split_vma+0x10/0x10 [ 39.070685] ? find_held_lock+0x2c/0x110 [ 39.071249] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.071833] ? lock_is_held_type+0x9f/0x120 [ 39.072393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.073021] ? mtree_range_walk+0x632/0x900 [ 39.073581] ? mas_walk+0x5c7/0x7c0 [ 39.074077] do_vmi_munmap+0x1f1/0x2b0 [ 39.074583] mmap_region+0x1f9/0x2660 [ 39.075086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.075617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.076349] ? __pfx_lock_acquire+0x10/0x10 [ 39.076903] ? __pfx_mmap_region+0x10/0x10 [ 39.077449] ? security_mmap_addr+0x7d/0xa0 [ 39.078000] ? get_unmapped_area+0x1f5/0x3f0 [ 39.078572] do_mmap+0x854/0xf00 [ 39.079027] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.079533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.080109] ksys_mmap_pgoff+0x3af/0x500 [ 39.080633] do_syscall_64+0x3f/0x90 [ 39.081130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.081796] RIP: 0033:0x7f812cfa8d82 [ 39.082268] 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 [ 39.084517] RSP: 002b:00007ffe455443a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.085456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f812cfa8d82 [ 39.086336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f812c3e2000 [ 39.087217] RBP: 00007f812c3e2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.088094] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617b594fec0 [ 39.088967] R13: 00007ffe455443c0 R14: 00007ffe455443f0 R15: 00007ffe45544750 [ 39.089856] [ 39.090157] [ 39.090377] Allocated by task 213: [ 39.090819] kasan_save_stack+0x22/0x50 [ 39.091353] kasan_set_track+0x25/0x30 [ 39.091860] __kasan_slab_alloc+0x59/0x70 [ 39.092403] kmem_cache_alloc+0x16b/0x370 [ 39.092935] vm_area_dup+0x20/0x160 [ 39.093411] __split_vma+0x170/0x950 [ 39.093892] split_vma+0xc6/0x110 [ 39.094351] mprotect_fixup+0x8d2/0xb30 [ 39.094866] do_mprotect_pkey+0x87e/0xd40 [ 39.095424] __x64_sys_mprotect+0x78/0xc0 [ 39.095961] do_syscall_64+0x3f/0x90 [ 39.096451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.097120] [ 39.097350] Freed by task 213: [ 39.097753] kasan_save_stack+0x22/0x50 [ 39.098287] kasan_set_track+0x25/0x30 [ 39.098805] kasan_save_free_info+0x2b/0x50 [ 39.099371] __kasan_slab_free+0x10a/0x190 [ 39.099922] kmem_cache_free+0x10d/0x4d0 [ 39.100443] rcu_core+0x8c8/0x2860 [ 39.100906] __do_softirq+0x1b7/0x7d4 [ 39.101398] [ 39.101621] Last potentially related work creation: [ 39.102234] kasan_save_stack+0x22/0x50 [ 39.102754] __kasan_record_aux_stack+0x8e/0xa0 [ 39.103354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.104087] remove_vma+0x139/0x170 [ 39.104551] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.105134] do_vmi_munmap+0x1f1/0x2b0 [ 39.105631] __vm_munmap+0x138/0x3a0 [ 39.106116] __x64_sys_munmap+0x59/0x80 [ 39.106630] do_syscall_64+0x3f/0x90 [ 39.107124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.107805] [ 39.108034] The buggy address belongs to the object at ffff88800f69d740 [ 39.108034] which belongs to the cache vm_area_struct of size 168 [ 39.109599] The buggy address is located 88 bytes inside of [ 39.109599] freed 168-byte region [ffff88800f69d740, ffff88800f69d7e8) [ 39.111064] [ 39.111288] The buggy address belongs to the physical page: [ 39.111982] page:000000005e896452 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf69d [ 39.113101] memcg:ffff88800e3ddd01 [ 39.113536] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.114195] page_type: 0xffffffff() [ 39.114663] raw: 0100000000000200 ffff88800879fc80 ffffea000067aa00 dead000000000008 [ 39.115639] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ddd01 [ 39.116578] page dumped because: kasan: bad access detected [ 39.117274] [ 39.117493] Memory state around the buggy address: [ 39.118088] ffff88800f69d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.118977] ffff88800f69d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.119866] >ffff88800f69d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.120744] ^ [ 39.121252] ffff88800f69d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.122138] ffff88800f69d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.123028] ================================================================== [ 39.123984] Disabling lock debugging due to kernel taint [ 41.440192] BUG: Bad rss-counter state mm:0000000003fa704f type:MM_FILEPAGES val:33 [ 41.441355] BUG: Bad rss-counter state mm:0000000003fa704f type:MM_ANONPAGES val:22 [ 41.799386] BUG: Bad rss-counter state mm:0000000087605be6 type:MM_FILEPAGES val:33 [ 41.800318] BUG: Bad rss-counter state mm:0000000087605be6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48598' (ECDSA) to the list of known hosts. 2023/06/20 02:05:37 fuzzer started 2023/06/20 02:05:37 dialing manager at localhost:44161 2023/06/20 02:05:37 checking machine... 2023/06/20 02:05:37 checking revisions... [ 42.531938] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:05:37 testing simple program... [ 42.572799] cgroup: Unknown subsys name 'net' [ 42.611866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:05:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801cd977d0 RCX=ffffffff86137501 RDX=0000000000000000 RSI=ffffffff8180c585 RDI=ffff88801cd977dc RBP=0000000000000001 RSP=ffff88801cd976e8 R8 =ffffffff8613751e R9 =ffff88801cd97748 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801cd977d0 R13=0000000000000000 R14=ffff888016bb1b40 R15=0000000000000001 RIP=ffffffff813ad4b6 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 00007fd7543e1900 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=00007fff8b927000 CR3=0000000014534000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f572eefb0b0 CR3=000000000e4bc000 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=2037333a35303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000