[ 23.868560] BUG: Bad rss-counter state mm:00000000aafeda60 type:MM_FILEPAGES val:33 [ 23.869947] BUG: Bad rss-counter state mm:00000000aafeda60 type:MM_ANONPAGES val:22 [ 23.986437] ================================================================== [ 23.987137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.987857] Read of size 8 at addr ffff88801c0325c8 by task sshd/219 [ 23.988447] [ 23.988624] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.989287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.990126] Call Trace: [ 23.990374] <TASK> [ 23.990589] dump_stack_lvl+0x91/0xf0 [ 23.990967] print_report+0xcc/0x620 [ 23.991337] ? __virt_addr_valid+0x102/0x340 [ 23.991780] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.992256] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.992734] kasan_report+0xbe/0xf0 [ 23.993102] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.993576] vma_interval_tree_remove+0xc75/0xec0 [ 23.994038] vma_prepare+0xc54/0x11a0 [ 23.994401] __split_vma+0x5af/0x950 [ 23.994758] ? __pfx___split_vma+0x10/0x10 [ 23.995155] ? find_held_lock+0x2c/0x110 [ 23.995555] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.995986] ? lock_is_held_type+0x9f/0x120 [ 23.996401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.996874] ? mtree_range_walk+0x632/0x900 [ 23.997294] ? mas_walk+0x5c7/0x7c0 [ 23.997608] do_vmi_munmap+0x1f1/0x2b0 [ 23.997913] mmap_region+0x1f9/0x2660 [ 23.998211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.998528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.998976] ? __pfx_lock_acquire+0x10/0x10 [ 23.999304] ? __pfx_mmap_region+0x10/0x10 [ 23.999631] ? security_mmap_addr+0x7d/0xa0 [ 23.999964] ? get_unmapped_area+0x1f5/0x3f0 [ 24.000305] do_mmap+0x854/0xf00 [ 24.000581] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.000891] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.001240] ksys_mmap_pgoff+0x3af/0x500 [ 24.001553] do_syscall_64+0x3f/0x90 [ 24.001845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.002248] RIP: 0033:0x7f6eb74dad82 [ 24.002536] 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 [ 24.003875] RSP: 002b:00007fff19abe7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.004450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6eb74dad82 [ 24.004984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6eb6914000 [ 24.005513] RBP: 00007f6eb6914000 R08: 0000000000000009 R09: 0000000000001000 [ 24.006049] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e9f7deec0 [ 24.006573] R13: 00007fff19abe800 R14: 00007fff19abe830 R15: 00007fff19abeb90 [ 24.007120] </TASK> [ 24.007303] [ 24.007432] Allocated by task 210: [ 24.007697] kasan_save_stack+0x22/0x50 [ 24.008006] kasan_set_track+0x25/0x30 [ 24.008306] __kasan_slab_alloc+0x59/0x70 [ 24.008634] kmem_cache_alloc+0x16b/0x370 [ 24.008951] vm_area_dup+0x20/0x160 [ 24.009238] __split_vma+0x170/0x950 [ 24.009531] split_vma+0xc6/0x110 [ 24.009804] mprotect_fixup+0x8d2/0xb30 [ 24.010111] do_mprotect_pkey+0x87e/0xd40 [ 24.010430] __x64_sys_mprotect+0x78/0xc0 [ 24.010752] do_syscall_64+0x3f/0x90 [ 24.011050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.011451] [ 24.011582] Freed by task 210: [ 24.011820] kasan_save_stack+0x22/0x50 [ 24.012133] kasan_set_track+0x25/0x30 [ 24.012432] kasan_save_free_info+0x2b/0x50 [ 24.012771] __kasan_slab_free+0x10a/0x190 [ 24.013104] kmem_cache_free+0x10d/0x4d0 [ 24.013423] rcu_core+0x8c8/0x2860 [ 24.013692] __do_softirq+0x1b7/0x7d4 [ 24.013984] [ 24.014118] Last potentially related work creation: [ 24.014479] kasan_save_stack+0x22/0x50 [ 24.014780] __kasan_record_aux_stack+0x8e/0xa0 [ 24.015112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.015494] remove_vma+0x139/0x170 [ 24.015759] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.016113] do_vmi_munmap+0x1f1/0x2b0 [ 24.016425] __vm_munmap+0x138/0x3a0 [ 24.016719] __x64_sys_munmap+0x59/0x80 [ 24.017037] do_syscall_64+0x3f/0x90 [ 24.017342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.017744] [ 24.017875] The buggy address belongs to the object at ffff88801c032570 [ 24.017875] which belongs to the cache vm_area_struct of size 168 [ 24.018808] The buggy address is located 88 bytes inside of [ 24.018808] freed 168-byte region [ffff88801c032570, ffff88801c032618) [ 24.019691] [ 24.019825] The buggy address belongs to the physical page: [ 24.020246] page:00000000cf365e92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c032 [ 24.020933] memcg:ffff88801c011801 [ 24.021198] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.021599] page_type: 0xffffffff() [ 24.021874] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.022455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801c011801 [ 24.023023] page dumped because: kasan: bad access detected [ 24.023440] [ 24.023575] Memory state around the buggy address: [ 24.023940] ffff88801c032480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.024486] ffff88801c032500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.025028] >ffff88801c032580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.025556] ^ [ 24.025978] ffff88801c032600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.026520] ffff88801c032680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.027057] ================================================================== [ 24.027856] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.308690] BUG: Bad rss-counter state mm:000000002f847ce3 type:MM_FILEPAGES val:33 [ 25.309851] BUG: Bad rss-counter state mm:000000002f847ce3 type:MM_ANONPAGES val:22 [ 25.688045] BUG: Bad rss-counter state mm:0000000061b07434 type:MM_FILEPAGES val:33 [ 25.689748] BUG: Bad rss-counter state mm:0000000061b07434 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55125' (ECDSA) to the list of known hosts. 2023/06/20 11:17:31 fuzzer started 2023/06/20 11:17:31 dialing manager at localhost:36067 2023/06/20 11:17:31 checking machine... 2023/06/20 11:17:31 checking revisions... [ 26.488633] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:17:31 testing simple program... [ 26.536499] cgroup: Unknown subsys name 'net' [ 26.582302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009f978d0 RCX=ffffffff8386b38e RDX=ffff888016850000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800ec72000 RSP=ffff888009f97838 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888008c798c0 R13=00000000fffffff0 R14=ffff88800ec72579 R15=ffff88800ec72600 RIP=ffffffff814c0860 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 00007fa7c9862900 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=00007fa7c9e19618 CR3=000000000fe0e000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff84537da6 RDX=000000000003537d RSI=000000000003537d RDI=ffffffff865be7e4 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000217 [----APC] 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=00007f123472f028 CR3=000000000d970000 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=f1fb4ca8082a3090804571e03b7d8581 XMM02=0000000000119c48eff9b2d0a8fce9cb XMM03=0000000000119d182c67c8bc2e329bc3 XMM04=5c035d05c840d3f500000000000ae988 XMM05=a59754811b21df6d0000000000131790 XMM06=806171799158d967000000000012fdb0 XMM07=e042d86d42eb936e0000000000120cc8 XMM08=cf4a8541d96bf74b0000000000119d18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000