[ 23.662738] BUG: Bad rss-counter state mm:00000000848bbcda type:MM_FILEPAGES val:33 [ 23.664086] BUG: Bad rss-counter state mm:00000000848bbcda type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.814144] ================================================================== [ 23.815052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.815989] Read of size 8 at addr ffff88800ba58a50 by task sshd/219 [ 23.816756] [ 23.816972] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.817924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.818899] Call Trace: [ 23.819216] [ 23.819547] dump_stack_lvl+0x91/0xf0 [ 23.820041] print_report+0xcc/0x620 [ 23.820527] ? __virt_addr_valid+0x102/0x340 [ 23.821082] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.821693] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.822308] kasan_report+0xbe/0xf0 [ 23.822788] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.823405] vma_interval_tree_remove+0xc75/0xec0 [ 23.824011] vma_prepare+0xc54/0x11a0 [ 23.824483] __split_vma+0x5af/0x950 [ 23.824959] ? __pfx___split_vma+0x10/0x10 [ 23.825479] ? find_held_lock+0x2c/0x110 [ 23.825997] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.826576] ? lock_is_held_type+0x9f/0x120 [ 23.827110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.827724] ? mtree_range_walk+0x632/0x900 [ 23.828279] ? mas_walk+0x5c7/0x7c0 [ 23.828761] do_vmi_munmap+0x1f1/0x2b0 [ 23.829248] mmap_region+0x1f9/0x2660 [ 23.829723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.830226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.830942] ? __pfx_lock_acquire+0x10/0x10 [ 23.831478] ? __pfx_mmap_region+0x10/0x10 [ 23.832026] ? security_mmap_addr+0x7d/0xa0 [ 23.832555] ? get_unmapped_area+0x1f5/0x3f0 [ 23.833099] do_mmap+0x854/0xf00 [ 23.833532] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.834023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.834580] ksys_mmap_pgoff+0x3af/0x500 [ 23.835084] do_syscall_64+0x3f/0x90 [ 23.835571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.836223] RIP: 0033:0x7f7065a2bd82 [ 23.836677] 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 [ 23.838789] RSP: 002b:00007fff887b74f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.839722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7065a2bd82 [ 23.840559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7064e65000 [ 23.841396] RBP: 00007f7064e65000 R08: 0000000000000009 R09: 0000000000001000 [ 23.842243] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c8ebc4b20 [ 23.843091] R13: 00007fff887b7510 R14: 00007fff887b7540 R15: 00007fff887b78a0 [ 23.843919] [ 23.844196] [ 23.844402] Allocated by task 212: [ 23.844816] kasan_save_stack+0x22/0x50 [ 23.845305] kasan_set_track+0x25/0x30 [ 23.845782] __kasan_slab_alloc+0x59/0x70 [ 23.846278] kmem_cache_alloc+0x16b/0x370 [ 23.846770] vm_area_dup+0x20/0x160 [ 23.847201] __split_vma+0x170/0x950 [ 23.847648] split_vma+0xc6/0x110 [ 23.848064] mprotect_fixup+0x8d2/0xb30 [ 23.848545] do_mprotect_pkey+0x87e/0xd40 [ 23.849056] __x64_sys_mprotect+0x78/0xc0 [ 23.849562] do_syscall_64+0x3f/0x90 [ 23.850055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.850705] [ 23.850916] Freed by task 212: [ 23.851313] kasan_save_stack+0x22/0x50 [ 23.851834] kasan_set_track+0x25/0x30 [ 23.852333] kasan_save_free_info+0x2b/0x50 [ 23.852860] __kasan_slab_free+0x10a/0x190 [ 23.853403] kmem_cache_free+0x10d/0x4d0 [ 23.853932] rcu_core+0x8c8/0x2860 [ 23.854373] __do_softirq+0x1b7/0x7d4 [ 23.854881] [ 23.855102] Last potentially related work creation: [ 23.855736] kasan_save_stack+0x22/0x50 [ 23.856246] __kasan_record_aux_stack+0x8e/0xa0 [ 23.856835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.857483] remove_vma+0x139/0x170 [ 23.857957] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.858549] do_vmi_munmap+0x1f1/0x2b0 [ 23.859063] __vm_munmap+0x138/0x3a0 [ 23.859580] __x64_sys_munmap+0x59/0x80 [ 23.860091] do_syscall_64+0x3f/0x90 [ 23.860575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.861221] [ 23.861439] The buggy address belongs to the object at ffff88800ba589f8 [ 23.861439] which belongs to the cache vm_area_struct of size 168 [ 23.862911] The buggy address is located 88 bytes inside of [ 23.862911] freed 168-byte region [ffff88800ba589f8, ffff88800ba58aa0) [ 23.864346] [ 23.864575] The buggy address belongs to the physical page: [ 23.865245] page:00000000faec8101 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba58 [ 23.866346] memcg:ffff88800beb7301 [ 23.866805] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.867466] page_type: 0xffffffff() [ 23.867964] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.868900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800beb7301 [ 23.869822] page dumped because: kasan: bad access detected [ 23.870476] [ 23.870709] Memory state around the buggy address: [ 23.871290] ffff88800ba58900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.872196] ffff88800ba58980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 23.873065] >ffff88800ba58a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.873936] ^ [ 23.874644] ffff88800ba58a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 23.875583] ffff88800ba58b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.876453] ================================================================== [ 23.877466] Disabling lock debugging due to kernel taint [ 26.078593] BUG: Bad rss-counter state mm:000000003110c3b3 type:MM_FILEPAGES val:33 [ 26.079837] BUG: Bad rss-counter state mm:000000003110c3b3 type:MM_ANONPAGES val:22 [ 26.623798] BUG: Bad rss-counter state mm:00000000056ce15b type:MM_FILEPAGES val:33 [ 26.624966] BUG: Bad rss-counter state mm:00000000056ce15b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4407' (ECDSA) to the list of known hosts. 2023/06/20 14:49:16 fuzzer started 2023/06/20 14:49:16 dialing manager at localhost:36067 2023/06/20 14:49:16 checking machine... 2023/06/20 14:49:16 checking revisions... [ 27.290802] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:49:17 testing simple program... [ 27.341346] cgroup: Unknown subsys name 'net' [ 27.382749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:49:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff818cc02f RCX=0000000000000001 RDX=1ffff11002dbaf24 RSI=ffff888016dd7d18 RDI=ffffffff818cc02f RBP=ffff888016dd7920 RSP=ffff888016dd7898 R8 =0000000000000001 R9 =ffff888016dd7908 R10=0000000000038001 R11=0000000000024091 R12=ffff888016dd7990 R13=0000000000000000 R14=ffff888015a49b40 R15=ffff8880143fdd98 RIP=ffffffff811fc7a0 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 00007fcd17b6a900 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=00007ffe0b376000 CR3=0000000016994000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff81716acb RDX=ffff888015a49b40 RSI=0000000000000000 RDI=0000000000000006 RBP=000055a41f78414c RSP=ffff888016dd7de0 R8 =0000000000000006 R9 =000055a41f764000 R10=000055a41f78414c R11=0000000000000000 R12=ffff888016c0bd98 R13=000055a41f764000 R14=00000000ffffffff R15=ffff888016c0bdc8 RIP=ffffffff814c086b RFL=00000297 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcd17b6a900 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=000055a41f78414c CR3=0000000016994000 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=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