[ 26.339577] BUG: Bad rss-counter state mm:00000000a706ea3d type:MM_FILEPAGES val:33 [ 26.339600] BUG: Bad rss-counter state mm:00000000a706ea3d type:MM_ANONPAGES val:22 [ 26.485666] ================================================================== [ 26.486353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.487068] Read of size 8 at addr ffff88801a6dec20 by task sshd/219 [ 26.487592] [ 26.487751] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.488373] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.489090] Call Trace: [ 26.489323] [ 26.489648] dump_stack_lvl+0x91/0xf0 [ 26.490052] print_report+0xcc/0x620 [ 26.490442] ? __virt_addr_valid+0x102/0x340 [ 26.490850] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.491299] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.491765] kasan_report+0xbe/0xf0 [ 26.492119] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.492604] vma_interval_tree_remove+0xc75/0xec0 [ 26.493049] vma_prepare+0xc54/0x11a0 [ 26.493408] __split_vma+0x5af/0x950 [ 26.493778] ? __pfx___split_vma+0x10/0x10 [ 26.494174] ? find_held_lock+0x2c/0x110 [ 26.494562] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.494982] ? lock_is_held_type+0x9f/0x120 [ 26.495378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.495818] ? mtree_range_walk+0x632/0x900 [ 26.496224] ? mas_walk+0x5c7/0x7c0 [ 26.496581] do_vmi_munmap+0x1f1/0x2b0 [ 26.496949] mmap_region+0x1f9/0x2660 [ 26.497307] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.497686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.498209] ? __pfx_lock_acquire+0x10/0x10 [ 26.498620] ? __pfx_mmap_region+0x10/0x10 [ 26.499009] ? security_mmap_addr+0x7d/0xa0 [ 26.499406] ? get_unmapped_area+0x1f5/0x3f0 [ 26.499829] do_mmap+0x854/0xf00 [ 26.500157] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.500529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.500953] ksys_mmap_pgoff+0x3af/0x500 [ 26.501330] do_syscall_64+0x3f/0x90 [ 26.501697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.502178] RIP: 0033:0x7fa42ab11d82 [ 26.502525] 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 [ 26.504087] RSP: 002b:00007ffc35f54e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.504754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa42ab11d82 [ 26.505386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa429f4b000 [ 26.505993] RBP: 00007fa429f4b000 R08: 0000000000000009 R09: 0000000000001000 [ 26.506627] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fce8ff5ec0 [ 26.507259] R13: 00007ffc35f54e80 R14: 00007ffc35f54eb0 R15: 00007ffc35f55210 [ 26.507890] [ 26.508111] [ 26.508272] Allocated by task 207: [ 26.508606] kasan_save_stack+0x22/0x50 [ 26.508993] kasan_set_track+0x25/0x30 [ 26.509352] __kasan_slab_alloc+0x59/0x70 [ 26.509741] kmem_cache_alloc+0x16b/0x370 [ 26.510122] vm_area_dup+0x20/0x160 [ 26.510481] __split_vma+0x170/0x950 [ 26.510831] split_vma+0xc6/0x110 [ 26.511159] mprotect_fixup+0x8d2/0xb30 [ 26.511530] do_mprotect_pkey+0x87e/0xd40 [ 26.511906] __x64_sys_mprotect+0x78/0xc0 [ 26.512294] do_syscall_64+0x3f/0x90 [ 26.512649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.513151] [ 26.513311] Freed by task 206: [ 26.513595] kasan_save_stack+0x22/0x50 [ 26.513960] kasan_set_track+0x25/0x30 [ 26.514324] kasan_save_free_info+0x2b/0x50 [ 26.514746] __kasan_slab_free+0x10a/0x190 [ 26.515142] kmem_cache_free+0x10d/0x4d0 [ 26.515514] rcu_core+0x8c8/0x2860 [ 26.515845] __do_softirq+0x1b7/0x7d4 [ 26.516190] [ 26.516346] Last potentially related work creation: [ 26.516785] kasan_save_stack+0x22/0x50 [ 26.517165] __kasan_record_aux_stack+0x8e/0xa0 [ 26.517594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.518068] remove_vma+0x139/0x170 [ 26.518397] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.518835] do_vmi_munmap+0x1f1/0x2b0 [ 26.519185] __vm_munmap+0x138/0x3a0 [ 26.519524] __x64_sys_munmap+0x59/0x80 [ 26.519904] do_syscall_64+0x3f/0x90 [ 26.520251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.520718] [ 26.520882] The buggy address belongs to the object at ffff88801a6debc8 [ 26.520882] which belongs to the cache vm_area_struct of size 168 [ 26.521967] The buggy address is located 88 bytes inside of [ 26.521967] freed 168-byte region [ffff88801a6debc8, ffff88801a6dec70) [ 26.523019] [ 26.523183] The buggy address belongs to the physical page: [ 26.523692] page:000000005c599656 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a6de [ 26.524510] memcg:ffff88801a6c7501 [ 26.524816] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.525281] page_type: 0xffffffff() [ 26.525626] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.526309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a6c7501 [ 26.526995] page dumped because: kasan: bad access detected [ 26.527488] [ 26.527651] Memory state around the buggy address: [ 26.528072] ffff88801a6deb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.528695] ffff88801a6deb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 26.529315] >ffff88801a6dec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 26.529936] ^ [ 26.530328] ffff88801a6dec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.530971] ffff88801a6ded00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.531597] ================================================================== [ 26.532355] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.237432] BUG: Bad rss-counter state mm:00000000698c1c71 type:MM_FILEPAGES val:33 [ 28.238239] BUG: Bad rss-counter state mm:00000000698c1c71 type:MM_ANONPAGES val:22 [ 28.645369] BUG: Bad rss-counter state mm:000000003869e55a type:MM_FILEPAGES val:33 [ 28.646136] BUG: Bad rss-counter state mm:000000003869e55a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32987' (ECDSA) to the list of known hosts. 2023/06/20 08:11:14 fuzzer started 2023/06/20 08:11:14 dialing manager at localhost:44161 2023/06/20 08:11:14 checking machine... 2023/06/20 08:11:14 checking revisions... [ 29.283173] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:11:14 testing simple program... [ 29.330947] cgroup: Unknown subsys name 'net' [ 29.375624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:11:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc63d9a0940 CR3=0000000014122000 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=6e4b98f8752497bb1b4a008bdafd2246 XMM02=2c67c8bc2e329bc3000000000011ccf8 XMM03=fb795ef6d65770560000000000122e40 XMM04=1f98a25cccc566bf00000000000ae988 XMM05=dfcdbad4f1609c3700000000001333b0 XMM06=7737510df1fffdc50000000000132550 XMM07=e042d86d42eb936e0000000000123118 XMM08=5cfe2e82738a1d79000000000011cd58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ee7e RBX=0000000000000002 RCX=ffffffff86137501 RDX=ffff88806cf09ab8 RSI=ffffffff8180ee7e RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff8613751e R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b38 R13=ffff88806cf09ab8 R14=ffff88800c5d1b40 R15=ffff88806cf09a70 RIP=ffffffff81130641 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 00007f4379e16900 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=00007f4379df5020 CR3=000000001a542000 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=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