[ 38.086914] BUG: Bad rss-counter state mm:00000000154172f9 type:MM_FILEPAGES val:33 [ 38.088425] BUG: Bad rss-counter state mm:00000000154172f9 type:MM_ANONPAGES val:22 [ 38.253146] ================================================================== [ 38.254279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.255536] Read of size 8 at addr ffff888009a57228 by task sshd/218 [ 38.256477] [ 38.256744] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.257780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.258764] Call Trace: [ 38.259080] [ 38.259373] dump_stack_lvl+0x91/0xf0 [ 38.259861] print_report+0xcc/0x620 [ 38.260339] ? __virt_addr_valid+0x102/0x340 [ 38.260892] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.261519] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.262132] kasan_report+0xbe/0xf0 [ 38.262610] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.263228] vma_interval_tree_remove+0xc75/0xec0 [ 38.263840] vma_prepare+0xc54/0x11a0 [ 38.264324] __split_vma+0x5af/0x950 [ 38.264796] ? __pfx___split_vma+0x10/0x10 [ 38.265330] ? find_held_lock+0x2c/0x110 [ 38.265856] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.266423] ? lock_is_held_type+0x9f/0x120 [ 38.266963] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.267583] ? mtree_range_walk+0x632/0x900 [ 38.268130] ? mas_walk+0x5c7/0x7c0 [ 38.268604] do_vmi_munmap+0x1f1/0x2b0 [ 38.269102] mmap_region+0x1f9/0x2660 [ 38.269602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.270121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.270845] ? __pfx_lock_acquire+0x10/0x10 [ 38.271375] ? __pfx_mmap_region+0x10/0x10 [ 38.271929] ? security_mmap_addr+0x7d/0xa0 [ 38.272478] ? get_unmapped_area+0x1f5/0x3f0 [ 38.273058] do_mmap+0x854/0xf00 [ 38.273514] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.274029] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.274591] ksys_mmap_pgoff+0x3af/0x500 [ 38.275110] do_syscall_64+0x3f/0x90 [ 38.275602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.276270] RIP: 0033:0x7fd00808cd82 [ 38.276740] 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 [ 38.278879] RSP: 002b:00007ffdcaa83be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.279799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd00808cd82 [ 38.280674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0074c6000 [ 38.281584] RBP: 00007fd0074c6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.282466] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603b1f03ec0 [ 38.283346] R13: 00007ffdcaa83c00 R14: 00007ffdcaa83c30 R15: 00007ffdcaa83f90 [ 38.284229] [ 38.284535] [ 38.284750] Allocated by task 211: [ 38.285194] kasan_save_stack+0x22/0x50 [ 38.285721] kasan_set_track+0x25/0x30 [ 38.286234] __kasan_slab_alloc+0x59/0x70 [ 38.286780] kmem_cache_alloc+0x16b/0x370 [ 38.287319] vm_area_dup+0x20/0x160 [ 38.287789] __split_vma+0x170/0x950 [ 38.288273] split_vma+0xc6/0x110 [ 38.288729] mprotect_fixup+0x8d2/0xb30 [ 38.289247] do_mprotect_pkey+0x87e/0xd40 [ 38.289801] __x64_sys_mprotect+0x78/0xc0 [ 38.290339] do_syscall_64+0x3f/0x90 [ 38.290831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.291499] [ 38.291726] Freed by task 211: [ 38.292137] kasan_save_stack+0x22/0x50 [ 38.292661] kasan_set_track+0x25/0x30 [ 38.293175] kasan_save_free_info+0x2b/0x50 [ 38.293738] __kasan_slab_free+0x10a/0x190 [ 38.294285] kmem_cache_free+0x10d/0x4d0 [ 38.294810] rcu_core+0x8c8/0x2860 [ 38.295271] __do_softirq+0x1b7/0x7d4 [ 38.295768] [ 38.295991] Last potentially related work creation: [ 38.296593] kasan_save_stack+0x22/0x50 [ 38.297109] __kasan_record_aux_stack+0x8e/0xa0 [ 38.297709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.298370] remove_vma+0x139/0x170 [ 38.298840] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.299414] do_vmi_munmap+0x1f1/0x2b0 [ 38.299924] __vm_munmap+0x138/0x3a0 [ 38.300401] __x64_sys_munmap+0x59/0x80 [ 38.300924] do_syscall_64+0x3f/0x90 [ 38.301427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.302089] [ 38.302310] Second to last potentially related work creation: [ 38.303016] kasan_save_stack+0x22/0x50 [ 38.303541] __kasan_record_aux_stack+0x8e/0xa0 [ 38.304139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.304813] remove_vma+0x139/0x170 [ 38.305281] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.305861] do_vmi_munmap+0x1f1/0x2b0 [ 38.306367] mmap_region+0x1f9/0x2660 [ 38.306871] do_mmap+0x854/0xf00 [ 38.307322] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.307825] ksys_mmap_pgoff+0x3af/0x500 [ 38.308345] do_syscall_64+0x3f/0x90 [ 38.308832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.309516] [ 38.309736] The buggy address belongs to the object at ffff888009a571d0 [ 38.309736] which belongs to the cache vm_area_struct of size 168 [ 38.311258] The buggy address is located 88 bytes inside of [ 38.311258] freed 168-byte region [ffff888009a571d0, ffff888009a57278) [ 38.312695] [ 38.312908] The buggy address belongs to the physical page: [ 38.313593] page:00000000ed9ee73b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a57 [ 38.314686] memcg:ffff88800f3d5b01 [ 38.315119] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.315827] page_type: 0xffffffff() [ 38.316284] raw: 0100000000000200 ffff88800879fc80 ffffea00003b8a00 dead000000000007 [ 38.317220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3d5b01 [ 38.318159] page dumped because: kasan: bad access detected [ 38.318839] [ 38.319063] Memory state around the buggy address: [ 38.319659] ffff888009a57100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.320552] ffff888009a57180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.321431] >ffff888009a57200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.322304] ^ [ 38.322868] ffff888009a57280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.323736] ffff888009a57300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.324610] ================================================================== [ 38.325917] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.319852] BUG: Bad rss-counter state mm:0000000088063d12 type:MM_FILEPAGES val:33 [ 40.321025] BUG: Bad rss-counter state mm:0000000088063d12 type:MM_ANONPAGES val:22 [ 40.752024] BUG: Bad rss-counter state mm:00000000c2527edc type:MM_FILEPAGES val:33 [ 40.752702] BUG: Bad rss-counter state mm:00000000c2527edc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32883' (ECDSA) to the list of known hosts. 2023/06/20 05:59:16 fuzzer started 2023/06/20 05:59:16 dialing manager at localhost:44161 2023/06/20 05:59:16 checking machine... 2023/06/20 05:59:16 checking revisions... [ 41.487693] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:59:16 testing simple program... [ 41.539157] cgroup: Unknown subsys name 'net' [ 41.579750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:59:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010377e60 RCX=ffffffff8364292f RDX=ffff888015a7d1c0 RSI=000000000000001e RDI=0000000000000000 RBP=ffff888010377b70 RSP=ffff888010377b18 R8 =0000000000000005 R9 =0000000000000080 R10=000000000000001e R11=0000000000000000 R12=0000000000000000 R13=00007ffda3051af0 R14=000000000000001e R15=ffff888010377c58 RIP=ffffffff814c0388 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 00007f0c4985d900 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=00007f0c48c94650 CR3=000000000d8d4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e53ecefcb9157da300000000000ae988 XMM05=8d660680888b16160000000000136490 XMM06=bdf2e299e47b49d500000000001351c0 XMM07=fb795ef6d657705600000000001246b0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812d869a RDX=ffff888014710000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002e15e8a RSP=ffff8880170af438 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000df800000df8 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8180fd28 RFL=00000256 [---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 00007f067a99e900 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=00007ffe1a079000 CR3=000000000eb66000 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=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