[ 29.606732] BUG: Bad rss-counter state mm:000000007cf602cf type:MM_FILEPAGES val:33 [ 29.607293] BUG: Bad rss-counter state mm:000000007cf602cf type:MM_ANONPAGES val:22 [ 29.725428] ================================================================== [ 29.726501] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.727609] Read of size 8 at addr ffff88801bdab310 by task sshd/218 [ 29.728651] [ 29.728941] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.729867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.730393] Call Trace: [ 29.730570] [ 29.730723] dump_stack_lvl+0x91/0xf0 [ 29.730989] print_report+0xcc/0x620 [ 29.731251] ? __virt_addr_valid+0x102/0x340 [ 29.731553] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.731895] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.732228] kasan_report+0xbe/0xf0 [ 29.732492] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.732841] vma_interval_tree_remove+0xc75/0xec0 [ 29.733171] vma_prepare+0xc54/0x11a0 [ 29.733430] __split_vma+0x5af/0x950 [ 29.733689] ? __pfx___split_vma+0x10/0x10 [ 29.733976] ? find_held_lock+0x2c/0x110 [ 29.734263] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.734567] ? lock_is_held_type+0x9f/0x120 [ 29.734872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.735228] ? mtree_range_walk+0x632/0x900 [ 29.735545] ? mas_walk+0x5c7/0x7c0 [ 29.735824] do_vmi_munmap+0x1f1/0x2b0 [ 29.736112] mmap_region+0x1f9/0x2660 [ 29.736394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.736694] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.737122] ? __pfx_lock_acquire+0x10/0x10 [ 29.737433] ? __pfx_mmap_region+0x10/0x10 [ 29.737740] ? security_mmap_addr+0x7d/0xa0 [ 29.738053] ? get_unmapped_area+0x1f5/0x3f0 [ 29.738381] do_mmap+0x854/0xf00 [ 29.738640] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.738934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.739271] ksys_mmap_pgoff+0x3af/0x500 [ 29.739567] do_syscall_64+0x3f/0x90 [ 29.739844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.740223] RIP: 0033:0x7f9ba7ce9d82 [ 29.740494] 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 [ 29.741758] RSP: 002b:00007ffece6d9468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.742289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ba7ce9d82 [ 29.742789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ba7123000 [ 29.743281] RBP: 00007f9ba7123000 R08: 0000000000000009 R09: 0000000000001000 [ 29.743783] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d5644af70 [ 29.744273] R13: 00007ffece6d9480 R14: 00007ffece6d94b0 R15: 00007ffece6d9810 [ 29.744787] [ 29.744953] [ 29.745078] Allocated by task 209: [ 29.745330] kasan_save_stack+0x22/0x50 [ 29.745625] kasan_set_track+0x25/0x30 [ 29.745910] __kasan_slab_alloc+0x59/0x70 [ 29.746210] kmem_cache_alloc+0x16b/0x370 [ 29.746513] vm_area_dup+0x20/0x160 [ 29.746771] __split_vma+0x170/0x950 [ 29.747048] split_vma+0xc6/0x110 [ 29.747305] mprotect_fixup+0x8d2/0xb30 [ 29.747600] do_mprotect_pkey+0x87e/0xd40 [ 29.747900] __x64_sys_mprotect+0x78/0xc0 [ 29.748209] do_syscall_64+0x3f/0x90 [ 29.748487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.748870] [ 29.748991] Freed by task 202: [ 29.749222] kasan_save_stack+0x22/0x50 [ 29.749504] kasan_set_track+0x25/0x30 [ 29.749789] kasan_save_free_info+0x2b/0x50 [ 29.750093] __kasan_slab_free+0x10a/0x190 [ 29.750406] kmem_cache_free+0x10d/0x4d0 [ 29.750700] rcu_core+0x8c8/0x2860 [ 29.750963] __do_softirq+0x1b7/0x7d4 [ 29.751238] [ 29.751363] Last potentially related work creation: [ 29.751708] kasan_save_stack+0x22/0x50 [ 29.751993] __kasan_record_aux_stack+0x8e/0xa0 [ 29.752332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.752721] remove_vma+0x139/0x170 [ 29.752978] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.753318] do_vmi_munmap+0x1f1/0x2b0 [ 29.753598] __vm_munmap+0x138/0x3a0 [ 29.753872] __x64_sys_munmap+0x59/0x80 [ 29.754157] do_syscall_64+0x3f/0x90 [ 29.754425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.754811] [ 29.754943] The buggy address belongs to the object at ffff88801bdab2b8 [ 29.754943] which belongs to the cache vm_area_struct of size 168 [ 29.755814] The buggy address is located 88 bytes inside of [ 29.755814] freed 168-byte region [ffff88801bdab2b8, ffff88801bdab360) [ 29.756641] [ 29.756781] The buggy address belongs to the physical page: [ 29.757171] page:0000000056adba27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bdab [ 29.757813] memcg:ffff88801bd6fd01 [ 29.758061] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.758443] page_type: 0xffffffff() [ 29.758702] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.759240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bd6fd01 [ 29.759773] page dumped because: kasan: bad access detected [ 29.760153] [ 29.760275] Memory state around the buggy address: [ 29.760619] ffff88801bdab200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 29.761123] ffff88801bdab280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.761621] >ffff88801bdab300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.762123] ^ [ 29.762401] ffff88801bdab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.762902] ffff88801bdab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.763398] ================================================================== [ 29.763934] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.200598] BUG: Bad rss-counter state mm:000000005eed6d6b type:MM_FILEPAGES val:33 [ 32.201619] BUG: Bad rss-counter state mm:000000005eed6d6b type:MM_ANONPAGES val:22 [ 32.627285] BUG: Bad rss-counter state mm:00000000fc879d38 type:MM_FILEPAGES val:33 [ 32.628013] BUG: Bad rss-counter state mm:00000000fc879d38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4753' (ECDSA) to the list of known hosts. 2023/06/19 23:36:38 fuzzer started 2023/06/19 23:36:39 dialing manager at localhost:44161 2023/06/19 23:36:39 checking machine... 2023/06/19 23:36:39 checking revisions... [ 33.264625] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:36:39 testing simple program... [ 33.309564] cgroup: Unknown subsys name 'net' [ 33.372643] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:32 Registers: info registers vcpu 0 RAX=1ffffffff0bbf8d4 RBX=ffffffff85dfc6a4 RCX=ffffffff81809910 RDX=0000000000000001 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff88801474f3f8 R8 =ffffffff86137004 R9 =ffff88801474f4f0 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000217 [----APC] 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 00007f2972b90900 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=00007ff2da594650 CR3=000000000d5be000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8c36669bbfc7bbd700000000000ae988 XMM05=b52905712a7178c00000000000134930 XMM06=bdf2e299e47b49d500000000001333b0 XMM07=fb795ef6d65770560000000000123bf0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffec1708518 CR3=0000000005482000 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=00007ffa8f843510000055b497711790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000