[ 24.102169] BUG: Bad rss-counter state mm:0000000029c7a198 type:MM_FILEPAGES val:33 [ 24.103173] BUG: Bad rss-counter state mm:0000000029c7a198 type:MM_ANONPAGES val:22 [ 24.269364] ================================================================== [ 24.270281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.271221] Read of size 8 at addr ffff8880164f2058 by task sshd/219 [ 24.272087] [ 24.272307] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.273181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.274199] Call Trace: [ 24.274529] [ 24.274820] dump_stack_lvl+0x91/0xf0 [ 24.275325] print_report+0xcc/0x620 [ 24.275818] ? __virt_addr_valid+0x102/0x340 [ 24.276372] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.277017] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.277632] kasan_report+0xbe/0xf0 [ 24.278109] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.278762] vma_interval_tree_remove+0xc75/0xec0 [ 24.279409] vma_prepare+0xc54/0x11a0 [ 24.279914] __split_vma+0x5af/0x950 [ 24.280425] ? __pfx___split_vma+0x10/0x10 [ 24.280990] ? find_held_lock+0x2c/0x110 [ 24.281545] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.282142] ? lock_is_held_type+0x9f/0x120 [ 24.282710] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.283351] ? mtree_range_walk+0x632/0x900 [ 24.283941] ? mas_walk+0x5c7/0x7c0 [ 24.284457] do_vmi_munmap+0x1f1/0x2b0 [ 24.284980] mmap_region+0x1f9/0x2660 [ 24.285493] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.286033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.286794] ? __pfx_lock_acquire+0x10/0x10 [ 24.287359] ? __pfx_mmap_region+0x10/0x10 [ 24.287924] ? security_mmap_addr+0x7d/0xa0 [ 24.288513] ? get_unmapped_area+0x1f5/0x3f0 [ 24.289094] do_mmap+0x854/0xf00 [ 24.289559] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.290077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.290672] ksys_mmap_pgoff+0x3af/0x500 [ 24.291208] do_syscall_64+0x3f/0x90 [ 24.291720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.292399] RIP: 0033:0x7f82502aad82 [ 24.292897] 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 [ 24.295178] RSP: 002b:00007ffef9a78c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.296153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82502aad82 [ 24.297080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f824f6e4000 [ 24.297968] RBP: 00007f824f6e4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.298869] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587e921cf70 [ 24.299768] R13: 00007ffef9a78c90 R14: 00007ffef9a78cc0 R15: 00007ffef9a79020 [ 24.300684] [ 24.300997] [ 24.301222] Allocated by task 212: [ 24.301669] kasan_save_stack+0x22/0x50 [ 24.302198] kasan_set_track+0x25/0x30 [ 24.302713] __kasan_slab_alloc+0x59/0x70 [ 24.303265] kmem_cache_alloc+0x16b/0x370 [ 24.303808] vm_area_dup+0x20/0x160 [ 24.304293] __split_vma+0x170/0x950 [ 24.304794] split_vma+0xc6/0x110 [ 24.305259] mprotect_fixup+0x8d2/0xb30 [ 24.305785] do_mprotect_pkey+0x87e/0xd40 [ 24.306336] __x64_sys_mprotect+0x78/0xc0 [ 24.306891] do_syscall_64+0x3f/0x90 [ 24.307399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.308084] [ 24.308315] Freed by task 203: [ 24.308749] kasan_save_stack+0x22/0x50 [ 24.309290] kasan_set_track+0x25/0x30 [ 24.309806] kasan_save_free_info+0x2b/0x50 [ 24.310385] __kasan_slab_free+0x10a/0x190 [ 24.310946] kmem_cache_free+0x10d/0x4d0 [ 24.311484] rcu_core+0x8c8/0x2860 [ 24.311948] __do_softirq+0x1b7/0x7d4 [ 24.312459] [ 24.312691] Last potentially related work creation: [ 24.313305] kasan_save_stack+0x22/0x50 [ 24.313836] __kasan_record_aux_stack+0x8e/0xa0 [ 24.314448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.315130] remove_vma+0x139/0x170 [ 24.315605] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.316202] do_vmi_munmap+0x1f1/0x2b0 [ 24.316731] __vm_munmap+0x138/0x3a0 [ 24.317231] __x64_sys_munmap+0x59/0x80 [ 24.317754] do_syscall_64+0x3f/0x90 [ 24.318259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.318944] [ 24.319167] The buggy address belongs to the object at ffff8880164f2000 [ 24.319167] which belongs to the cache vm_area_struct of size 168 [ 24.320742] The buggy address is located 88 bytes inside of [ 24.320742] freed 168-byte region [ffff8880164f2000, ffff8880164f20a8) [ 24.322237] [ 24.322464] The buggy address belongs to the physical page: [ 24.323163] page:0000000034f55366 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164f2 [ 24.324321] memcg:ffff88800eddc501 [ 24.324776] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.325514] page_type: 0xffffffff() [ 24.325995] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b500 dead000000000007 [ 24.326959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eddc501 [ 24.327921] page dumped because: kasan: bad access detected [ 24.328636] [ 24.328861] Memory state around the buggy address: [ 24.329478] ffff8880164f1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.330393] ffff8880164f1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.331299] >ffff8880164f2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.332191] ^ [ 24.332981] ffff8880164f2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.333898] ffff8880164f2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.334801] ================================================================== [ 24.335832] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.599608] BUG: Bad rss-counter state mm:00000000f7c42289 type:MM_FILEPAGES val:33 [ 26.601388] BUG: Bad rss-counter state mm:00000000f7c42289 type:MM_ANONPAGES val:22 [ 27.184517] BUG: Bad rss-counter state mm:00000000435cff86 type:MM_FILEPAGES val:33 [ 27.185704] BUG: Bad rss-counter state mm:00000000435cff86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13751' (ECDSA) to the list of known hosts. 2023/06/20 21:11:43 fuzzer started 2023/06/20 21:11:44 dialing manager at localhost:36067 2023/06/20 21:11:44 checking machine... 2023/06/20 21:11:44 checking revisions... [ 27.839893] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:11:44 testing simple program... [ 27.889148] cgroup: Unknown subsys name 'net' [ 27.940448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:11:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff88800e2b76d0 RDI=ffff88806ce09aa8 RBP=ffff88800e2b76d0 RSP=ffff88806ce099f0 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff88800e2b0000 R14=ffff88800e2b76d8 R15=ffff88806ce09a98 RIP=ffffffff8113046e 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 00007f01d5832700 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=00007f194998401c CR3=0000000013a40000 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=2033343a31313a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31313a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008e37930 RCX=ffffffff8614da06 RDX=1ffff110011c6f26 RSI=ffff888008e37d40 RDI=ffff888008e37930 RBP=ffff888008e37d40 RSP=ffff888008e37888 R8 =ffffffff8614da0a R9 =ffff888008e37970 R10=0000000000038001 R11=00000000000244d5 R12=0000000000000008 R13=ffff888008e37978 R14=ffff888008e37d48 R15=ffff888008e37930 RIP=ffffffff8113041c 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 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=00007f290da11250 CR3=000000000d880000 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=60a0ac9f55c72689d944545bbd373564 XMM02=000000000011a898eff9b2d0a8fce9cb XMM03=000000000011a9682c67c8bc2e329bc3 XMM04=11a08cafdb6339ab00000000000ae988 XMM05=f80d16040d6d50180000000000132680 XMM06=2530e85d5b02836d00000000001310b0 XMM07=fb795ef6d65770560000000000121388 XMM08=2c67c8bc2e329bc3000000000011a908 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000