[ 37.328176] BUG: Bad rss-counter state mm:0000000012e67514 type:MM_FILEPAGES val:33 [ 37.329662] BUG: Bad rss-counter state mm:0000000012e67514 type:MM_ANONPAGES val:22 [ 37.489603] ================================================================== [ 37.490524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.491484] Read of size 8 at addr ffff88800eb76058 by task sshd/221 [ 37.492410] [ 37.492647] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.493543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.494553] Call Trace: [ 37.494873] [ 37.495168] dump_stack_lvl+0x91/0xf0 [ 37.495674] print_report+0xcc/0x620 [ 37.496181] ? __virt_addr_valid+0x102/0x340 [ 37.496738] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.497376] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.498001] kasan_report+0xbe/0xf0 [ 37.498475] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.499102] vma_interval_tree_remove+0xc75/0xec0 [ 37.499733] vma_prepare+0xc54/0x11a0 [ 37.500252] __split_vma+0x5af/0x950 [ 37.500726] ? __pfx___split_vma+0x10/0x10 [ 37.501272] ? find_held_lock+0x2c/0x110 [ 37.501795] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.502368] ? lock_is_held_type+0x9f/0x120 [ 37.502915] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.503543] ? mtree_range_walk+0x632/0x900 [ 37.504125] ? mas_walk+0x5c7/0x7c0 [ 37.504601] do_vmi_munmap+0x1f1/0x2b0 [ 37.505115] mmap_region+0x1f9/0x2660 [ 37.505603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.506140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.506857] ? __pfx_lock_acquire+0x10/0x10 [ 37.507397] ? __pfx_mmap_region+0x10/0x10 [ 37.507977] ? security_mmap_addr+0x7d/0xa0 [ 37.508513] ? get_unmapped_area+0x1f5/0x3f0 [ 37.509076] do_mmap+0x854/0xf00 [ 37.509516] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.510028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.510585] ksys_mmap_pgoff+0x3af/0x500 [ 37.511108] do_syscall_64+0x3f/0x90 [ 37.511594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.512269] RIP: 0033:0x7f0090e0fd82 [ 37.512724] 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 [ 37.514853] RSP: 002b:00007fff0e39fbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.515783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0090e0fd82 [ 37.516658] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0090249000 [ 37.517520] RBP: 00007f0090249000 R08: 0000000000000009 R09: 0000000000001000 [ 37.518377] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be45d55f70 [ 37.519229] R13: 00007fff0e39fbf0 R14: 00007fff0e39fc20 R15: 00007fff0e39ff80 [ 37.520137] [ 37.520434] [ 37.520650] Allocated by task 214: [ 37.521099] kasan_save_stack+0x22/0x50 [ 37.521606] kasan_set_track+0x25/0x30 [ 37.522111] __kasan_slab_alloc+0x59/0x70 [ 37.522638] kmem_cache_alloc+0x16b/0x370 [ 37.523170] vm_area_dup+0x20/0x160 [ 37.523638] __split_vma+0x170/0x950 [ 37.524133] split_vma+0xc6/0x110 [ 37.524571] mprotect_fixup+0x8d2/0xb30 [ 37.525089] do_mprotect_pkey+0x87e/0xd40 [ 37.525612] __x64_sys_mprotect+0x78/0xc0 [ 37.526149] do_syscall_64+0x3f/0x90 [ 37.526622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.527280] [ 37.527506] Freed by task 214: [ 37.527902] kasan_save_stack+0x22/0x50 [ 37.528430] kasan_set_track+0x25/0x30 [ 37.528932] kasan_save_free_info+0x2b/0x50 [ 37.529467] __kasan_slab_free+0x10a/0x190 [ 37.530012] kmem_cache_free+0x10d/0x4d0 [ 37.530520] rcu_core+0x8c8/0x2860 [ 37.530978] __do_softirq+0x1b7/0x7d4 [ 37.531477] [ 37.531695] Last potentially related work creation: [ 37.532305] kasan_save_stack+0x22/0x50 [ 37.532807] __kasan_record_aux_stack+0x8e/0xa0 [ 37.533469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.534127] remove_vma+0x139/0x170 [ 37.534579] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.535157] do_vmi_munmap+0x1f1/0x2b0 [ 37.535656] __vm_munmap+0x138/0x3a0 [ 37.536155] __x64_sys_munmap+0x59/0x80 [ 37.536649] do_syscall_64+0x3f/0x90 [ 37.537146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.537784] [ 37.538015] Second to last potentially related work creation: [ 37.538684] kasan_save_stack+0x22/0x50 [ 37.539198] __kasan_record_aux_stack+0x8e/0xa0 [ 37.539779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.540442] remove_vma+0x139/0x170 [ 37.540899] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.541475] do_vmi_munmap+0x1f1/0x2b0 [ 37.541995] __vm_munmap+0x138/0x3a0 [ 37.542471] __x64_sys_munmap+0x59/0x80 [ 37.542984] do_syscall_64+0x3f/0x90 [ 37.543501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.544186] [ 37.544398] The buggy address belongs to the object at ffff88800eb76000 [ 37.544398] which belongs to the cache vm_area_struct of size 168 [ 37.545889] The buggy address is located 88 bytes inside of [ 37.545889] freed 168-byte region [ffff88800eb76000, ffff88800eb760a8) [ 37.547345] [ 37.547576] The buggy address belongs to the physical page: [ 37.548260] page:00000000c10fe1a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb76 [ 37.549352] memcg:ffff88800eb69401 [ 37.549785] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.550504] page_type: 0xffffffff() [ 37.550974] raw: 0100000000000200 ffff88800879fc80 ffffea00001abdc0 dead000000000007 [ 37.551916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb69401 [ 37.552839] page dumped because: kasan: bad access detected [ 37.553515] [ 37.553732] Memory state around the buggy address: [ 37.554326] ffff88800eb75f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 37.555198] ffff88800eb75f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.556102] >ffff88800eb76000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.556962] ^ [ 37.557685] ffff88800eb76080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 37.558578] ffff88800eb76100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.559480] ================================================================== [ 37.560438] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.626511] BUG: Bad rss-counter state mm:000000007c39fbd1 type:MM_FILEPAGES val:33 [ 39.627511] BUG: Bad rss-counter state mm:000000007c39fbd1 type:MM_ANONPAGES val:22 [ 40.091856] BUG: Bad rss-counter state mm:00000000e92bcac9 type:MM_FILEPAGES val:33 [ 40.093041] BUG: Bad rss-counter state mm:00000000e92bcac9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64453' (ECDSA) to the list of known hosts. 2023/06/19 21:50:39 fuzzer started 2023/06/19 21:50:39 dialing manager at localhost:44161 2023/06/19 21:50:39 checking machine... 2023/06/19 21:50:39 checking revisions... [ 40.789400] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:50:39 testing simple program... [ 40.833316] cgroup: Unknown subsys name 'net' [ 40.895311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:50:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002c55f7c RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff8880162afbc8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f4198554900 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=00007f4198b0c0b0 CR3=00000000186c2000 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=ffff888008c58400 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=00007fd0f94fbd00 CR3=000000000e988000 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=94333e13ae32f682d242ac210fc07688 XMM02=000000000011e4c8eff9b2d0a8fce9cb XMM03=000000000011e5982c67c8bc2e329bc3 XMM04=47fe5e576af1e9ba00000000000ae988 XMM05=98dba2b0698c362000000000001361b0 XMM06=c291bd5c70af25b90000000000134ee0 XMM07=e042d86d42eb936e0000000000124a18 XMM08=b3a3116d1c8e3663000000000011e598 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000