[ 32.645399] BUG: Bad rss-counter state mm:00000000edabf386 type:MM_FILEPAGES val:33 [ 32.647432] BUG: Bad rss-counter state mm:00000000edabf386 type:MM_ANONPAGES val:22 [ 32.814218] ================================================================== [ 32.815142] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.816099] Read of size 8 at addr ffff888016e3f058 by task sshd/219 [ 32.816876] [ 32.817098] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.818107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.819091] Call Trace: [ 32.819435] [ 32.819729] dump_stack_lvl+0x91/0xf0 [ 32.820243] print_report+0xcc/0x620 [ 32.820736] ? __virt_addr_valid+0x102/0x340 [ 32.821287] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.821921] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.822546] kasan_report+0xbe/0xf0 [ 32.823024] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.823663] vma_interval_tree_remove+0xc75/0xec0 [ 32.824277] vma_prepare+0xc54/0x11a0 [ 32.824763] __split_vma+0x5af/0x950 [ 32.825240] ? __pfx___split_vma+0x10/0x10 [ 32.825769] ? find_held_lock+0x2c/0x110 [ 32.826298] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.826886] ? lock_is_held_type+0x9f/0x120 [ 32.827462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.828086] ? mtree_range_walk+0x632/0x900 [ 32.828650] ? mas_walk+0x5c7/0x7c0 [ 32.829137] do_vmi_munmap+0x1f1/0x2b0 [ 32.829634] mmap_region+0x1f9/0x2660 [ 32.830118] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.830635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.831375] ? __pfx_lock_acquire+0x10/0x10 [ 32.831939] ? __pfx_mmap_region+0x10/0x10 [ 32.832479] ? security_mmap_addr+0x7d/0xa0 [ 32.833022] ? get_unmapped_area+0x1f5/0x3f0 [ 32.833583] do_mmap+0x854/0xf00 [ 32.834033] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.834540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.835115] ksys_mmap_pgoff+0x3af/0x500 [ 32.835641] do_syscall_64+0x3f/0x90 [ 32.836129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.836787] RIP: 0033:0x7facdbe3bd82 [ 32.837251] 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 [ 32.839434] RSP: 002b:00007ffe88bbed78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.840369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facdbe3bd82 [ 32.841226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facdb275000 [ 32.842095] RBP: 00007facdb275000 R08: 0000000000000009 R09: 0000000000001000 [ 32.842962] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe52a3bd90 [ 32.843843] R13: 00007ffe88bbed90 R14: 00007ffe88bbedc0 R15: 00007ffe88bbf120 [ 32.844715] [ 32.845012] [ 32.845232] Allocated by task 211: [ 32.845668] kasan_save_stack+0x22/0x50 [ 32.846179] kasan_set_track+0x25/0x30 [ 32.846688] __kasan_slab_alloc+0x59/0x70 [ 32.847215] kmem_cache_alloc+0x16b/0x370 [ 32.847753] vm_area_dup+0x20/0x160 [ 32.848209] __split_vma+0x170/0x950 [ 32.848680] split_vma+0xc6/0x110 [ 32.849136] mprotect_fixup+0x8d2/0xb30 [ 32.849650] do_mprotect_pkey+0x87e/0xd40 [ 32.850169] __x64_sys_mprotect+0x78/0xc0 [ 32.850695] do_syscall_64+0x3f/0x90 [ 32.851175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.851838] [ 32.852062] Freed by task 211: [ 32.852461] kasan_save_stack+0x22/0x50 [ 32.852966] kasan_set_track+0x25/0x30 [ 32.853470] kasan_save_free_info+0x2b/0x50 [ 32.854008] __kasan_slab_free+0x10a/0x190 [ 32.854562] kmem_cache_free+0x10d/0x4d0 [ 32.855077] rcu_core+0x8c8/0x2860 [ 32.855538] __do_softirq+0x1b7/0x7d4 [ 32.856015] [ 32.856232] Last potentially related work creation: [ 32.856818] kasan_save_stack+0x22/0x50 [ 32.857326] __kasan_record_aux_stack+0x8e/0xa0 [ 32.857908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.858552] remove_vma+0x139/0x170 [ 32.859005] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.859589] do_vmi_munmap+0x1f1/0x2b0 [ 32.860076] __vm_munmap+0x138/0x3a0 [ 32.860546] __x64_sys_munmap+0x59/0x80 [ 32.861055] do_syscall_64+0x3f/0x90 [ 32.861542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.862183] [ 32.862399] The buggy address belongs to the object at ffff888016e3f000 [ 32.862399] which belongs to the cache vm_area_struct of size 168 [ 32.863894] The buggy address is located 88 bytes inside of [ 32.863894] freed 168-byte region [ffff888016e3f000, ffff888016e3f0a8) [ 32.865315] [ 32.865540] The buggy address belongs to the physical page: [ 32.866200] page:00000000d3e290d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e3f [ 32.867298] memcg:ffff88800dd9c301 [ 32.867745] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.868400] page_type: 0xffffffff() [ 32.868853] raw: 0100000000000200 ffff88800879fc80 ffffea00002e72c0 0000000000000002 [ 32.869797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd9c301 [ 32.870714] page dumped because: kasan: bad access detected [ 32.871376] [ 32.871607] Memory state around the buggy address: [ 32.872194] ffff888016e3ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.873060] ffff888016e3ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.873939] >ffff888016e3f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.874786] ^ [ 32.875533] ffff888016e3f080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.876389] ffff888016e3f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.877258] ================================================================== [ 32.878298] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.641923] BUG: Bad rss-counter state mm:000000001105a647 type:MM_FILEPAGES val:33 [ 34.642695] BUG: Bad rss-counter state mm:000000001105a647 type:MM_ANONPAGES val:22 [ 34.998420] BUG: Bad rss-counter state mm:00000000aba1d365 type:MM_FILEPAGES val:33 [ 34.999168] BUG: Bad rss-counter state mm:00000000aba1d365 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54909' (ECDSA) to the list of known hosts. 2023/06/19 20:05:03 fuzzer started 2023/06/19 20:05:04 dialing manager at localhost:44161 2023/06/19 20:05:04 checking machine... 2023/06/19 20:05:04 checking revisions... [ 35.647548] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:05:04 testing simple program... [ 35.687961] cgroup: Unknown subsys name 'net' [ 35.720393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:02 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=00007ffdbfb38ff8 CR3=0000000015ad2000 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=2033303a35303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110012911b5 RBX=ffff888009488d78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009488da8 RBP=ffff88800f1fc7e8 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800f1fc730 R14=ffffffff813782a8 R15=ffff88800f1fc730 RIP=ffffffff81846362 RFL=00000046 [---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 00007f3bf6a2e900 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=00007ffe76a76000 CR3=000000000db94000 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=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