[ 31.617771] BUG: Bad rss-counter state mm:0000000057c6021d type:MM_FILEPAGES val:33 [ 31.618834] BUG: Bad rss-counter state mm:0000000057c6021d type:MM_ANONPAGES val:22 [ 31.733837] ================================================================== [ 31.734580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.735352] Read of size 8 at addr ffff88800e48f4e0 by task sshd/220 [ 31.735975] [ 31.736155] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.736862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.737802] Call Trace: [ 31.738066] [ 31.738301] dump_stack_lvl+0x91/0xf0 [ 31.738697] print_report+0xcc/0x620 [ 31.739087] ? __virt_addr_valid+0x102/0x340 [ 31.739533] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740077] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740583] kasan_report+0xbe/0xf0 [ 31.740970] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.741465] vma_interval_tree_remove+0xc75/0xec0 [ 31.741957] vma_prepare+0xc54/0x11a0 [ 31.742343] __split_vma+0x5af/0x950 [ 31.742719] ? __pfx___split_vma+0x10/0x10 [ 31.743150] ? find_held_lock+0x2c/0x110 [ 31.743567] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.744020] ? lock_is_held_type+0x9f/0x120 [ 31.744454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.744961] ? mtree_range_walk+0x632/0x900 [ 31.745409] ? mas_walk+0x5c7/0x7c0 [ 31.745793] do_vmi_munmap+0x1f1/0x2b0 [ 31.746192] mmap_region+0x1f9/0x2660 [ 31.746583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.746999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.747575] ? __pfx_lock_acquire+0x10/0x10 [ 31.748007] ? __pfx_mmap_region+0x10/0x10 [ 31.748442] ? security_mmap_addr+0x7d/0xa0 [ 31.748879] ? get_unmapped_area+0x1f5/0x3f0 [ 31.749325] do_mmap+0x854/0xf00 [ 31.749678] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.750081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.750544] ksys_mmap_pgoff+0x3af/0x500 [ 31.750957] do_syscall_64+0x3f/0x90 [ 31.751344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.751874] RIP: 0033:0x7f5b92cafd82 [ 31.752249] 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 [ 31.754011] RSP: 002b:00007ffce5387948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.754752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b92cafd82 [ 31.755449] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b920e9000 [ 31.756144] RBP: 00007f5b920e9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.756849] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b0f6d8b20 [ 31.757541] R13: 00007ffce5387960 R14: 00007ffce5387990 R15: 00007ffce5387cf0 [ 31.758245] [ 31.758485] [ 31.758661] Allocated by task 213: [ 31.759010] kasan_save_stack+0x22/0x50 [ 31.759422] kasan_set_track+0x25/0x30 [ 31.759826] __kasan_slab_alloc+0x59/0x70 [ 31.760249] kmem_cache_alloc+0x16b/0x370 [ 31.760686] vm_area_dup+0x20/0x160 [ 31.761058] __split_vma+0x170/0x950 [ 31.761443] split_vma+0xc6/0x110 [ 31.761803] mprotect_fixup+0x8d2/0xb30 [ 31.762210] do_mprotect_pkey+0x87e/0xd40 [ 31.762638] __x64_sys_mprotect+0x78/0xc0 [ 31.763061] do_syscall_64+0x3f/0x90 [ 31.763447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.763973] [ 31.764148] Freed by task 13: [ 31.764464] kasan_save_stack+0x22/0x50 [ 31.764888] kasan_set_track+0x25/0x30 [ 31.765293] kasan_save_free_info+0x2b/0x50 [ 31.765731] __kasan_slab_free+0x10a/0x190 [ 31.766167] kmem_cache_free+0x10d/0x4d0 [ 31.766580] rcu_core+0x8c8/0x2860 [ 31.766940] __do_softirq+0x1b7/0x7d4 [ 31.767333] [ 31.767509] Last potentially related work creation: [ 31.767988] kasan_save_stack+0x22/0x50 [ 31.768400] __kasan_record_aux_stack+0x8e/0xa0 [ 31.768886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.769411] remove_vma+0x139/0x170 [ 31.769782] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.770242] do_vmi_munmap+0x1f1/0x2b0 [ 31.770641] __vm_munmap+0x138/0x3a0 [ 31.771022] __x64_sys_munmap+0x59/0x80 [ 31.771429] do_syscall_64+0x3f/0x90 [ 31.771817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.772338] [ 31.772515] Second to last potentially related work creation: [ 31.773086] kasan_save_stack+0x22/0x50 [ 31.773495] __kasan_record_aux_stack+0x8e/0xa0 [ 31.773966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.774488] remove_vma+0x139/0x170 [ 31.774862] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.775315] do_vmi_munmap+0x1f1/0x2b0 [ 31.775711] mmap_region+0x1f9/0x2660 [ 31.776106] do_mmap+0x854/0xf00 [ 31.776458] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.776861] ksys_mmap_pgoff+0x3af/0x500 [ 31.777272] do_syscall_64+0x3f/0x90 [ 31.777657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778177] [ 31.778353] The buggy address belongs to the object at ffff88800e48f488 [ 31.778353] which belongs to the cache vm_area_struct of size 168 [ 31.779678] The buggy address is located 88 bytes inside of [ 31.779678] freed 168-byte region [ffff88800e48f488, ffff88800e48f530) [ 31.780844] [ 31.781020] The buggy address belongs to the physical page: [ 31.781560] page:00000000f151cb07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe48f [ 31.782449] memcg:ffff88800e556401 [ 31.782804] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.783339] page_type: 0xffffffff() [ 31.783707] raw: 0100000000000200 ffff88800879fc80 ffffea00003708c0 dead000000000006 [ 31.784473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e556401 [ 31.785253] page dumped because: kasan: bad access detected [ 31.785797] [ 31.785971] Memory state around the buggy address: [ 31.786455] ffff88800e48f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.787154] ffff88800e48f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.787862] >ffff88800e48f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.788564] ^ [ 31.789203] ffff88800e48f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.789906] ffff88800e48f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.790602] ================================================================== [ 31.791351] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.877253] BUG: Bad rss-counter state mm:0000000015758231 type:MM_FILEPAGES val:33 [ 33.878903] BUG: Bad rss-counter state mm:0000000015758231 type:MM_ANONPAGES val:22 [ 34.464174] BUG: Bad rss-counter state mm:0000000018ce7b08 type:MM_FILEPAGES val:33 [ 34.465372] BUG: Bad rss-counter state mm:0000000018ce7b08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55706' (ECDSA) to the list of known hosts. 2023/06/20 10:30:13 fuzzer started 2023/06/20 10:30:13 dialing manager at localhost:44161 2023/06/20 10:30:13 checking machine... 2023/06/20 10:30:13 checking revisions... [ 35.106661] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:30:14 testing simple program... [ 35.157423] cgroup: Unknown subsys name 'net' [ 35.213172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:30:13 Registers: info registers vcpu 0 RAX=ffffffff836367f7 RBX=ffff888008f927e8 RCX=0000000000000000 RDX=0000000000000cc0 RSI=ffff888008f927e8 RDI=0000000000000cc0 RBP=ffff88800f4cfd90 RSP=ffff88800f4cfd20 R8 =0000000000000005 R9 =0000000000000000 R10=ffff88800f4cfdb0 R11=0000000000000001 R12=ffff888008fce500 R13=0000000000000009 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff81787af5 RFL=00000206 [-----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 00007fc1170a3900 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=00007fc11765b0b0 CR3=000000000e502000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f65956ef120 CR3=000000000d62c000 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=720bffc43895f49c834a2bfd6d63420f XMM02=2c67c8bc2e329bc3000000000011cf20 XMM03=fb795ef6d65770560000000000123ce8 XMM04=c83f67662cf689f000000000000ae988 XMM05=7fee1e21883df94d0000000000134ff0 XMM06=4fda316b135da52b0000000000134760 XMM07=e042d86d42eb936e0000000000123f68 XMM08=e3906a2713a69b70000000000011cf80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000