[ 35.190731] BUG: Bad rss-counter state mm:00000000504336ac type:MM_FILEPAGES val:33 [ 35.191229] BUG: Bad rss-counter state mm:00000000504336ac type:MM_ANONPAGES val:22 [ 35.289544] ================================================================== [ 35.290441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.291366] Read of size 8 at addr ffff88800e192df0 by task sshd/219 [ 35.292126] [ 35.292338] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.293188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.294254] Call Trace: [ 35.294544] [ 35.294775] dump_stack_lvl+0x91/0xf0 [ 35.295171] print_report+0xcc/0x620 [ 35.295559] ? __virt_addr_valid+0x102/0x340 [ 35.296004] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.296512] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.297011] kasan_report+0xbe/0xf0 [ 35.297383] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.297888] vma_interval_tree_remove+0xc75/0xec0 [ 35.298384] vma_prepare+0xc54/0x11a0 [ 35.298770] __split_vma+0x5af/0x950 [ 35.299148] ? __pfx___split_vma+0x10/0x10 [ 35.299577] ? find_held_lock+0x2c/0x110 [ 35.299998] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.300457] ? lock_is_held_type+0x9f/0x120 [ 35.300896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.301385] ? mtree_range_walk+0x632/0x900 [ 35.301828] ? mas_walk+0x5c7/0x7c0 [ 35.302213] do_vmi_munmap+0x1f1/0x2b0 [ 35.302580] mmap_region+0x1f9/0x2660 [ 35.302891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.303219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.303681] ? __pfx_lock_acquire+0x10/0x10 [ 35.304027] ? __pfx_mmap_region+0x10/0x10 [ 35.304370] ? security_mmap_addr+0x7d/0xa0 [ 35.304712] ? get_unmapped_area+0x1f5/0x3f0 [ 35.305065] do_mmap+0x854/0xf00 [ 35.305348] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.305675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.306038] ksys_mmap_pgoff+0x3af/0x500 [ 35.306388] do_syscall_64+0x3f/0x90 [ 35.306703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.307083] RIP: 0033:0x7fb11e0e2d82 [ 35.307313] 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 [ 35.308384] RSP: 002b:00007ffd05d846f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.308841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb11e0e2d82 [ 35.309269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb11d51c000 [ 35.309693] RBP: 00007fb11d51c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.310126] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd5f29cd90 [ 35.310553] R13: 00007ffd05d84710 R14: 00007ffd05d84740 R15: 00007ffd05d84aa0 [ 35.310983] [ 35.311130] [ 35.311241] Allocated by task 212: [ 35.311458] kasan_save_stack+0x22/0x50 [ 35.311719] kasan_set_track+0x25/0x30 [ 35.311967] __kasan_slab_alloc+0x59/0x70 [ 35.312234] kmem_cache_alloc+0x16b/0x370 [ 35.312514] vm_area_dup+0x20/0x160 [ 35.312750] __split_vma+0x170/0x950 [ 35.312996] split_vma+0xc6/0x110 [ 35.313224] mprotect_fixup+0x8d2/0xb30 [ 35.313490] do_mprotect_pkey+0x87e/0xd40 [ 35.313762] __x64_sys_mprotect+0x78/0xc0 [ 35.314034] do_syscall_64+0x3f/0x90 [ 35.314298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.314636] [ 35.314750] Freed by task 13: [ 35.314949] kasan_save_stack+0x22/0x50 [ 35.315214] kasan_set_track+0x25/0x30 [ 35.315473] kasan_save_free_info+0x2b/0x50 [ 35.315753] __kasan_slab_free+0x10a/0x190 [ 35.316032] kmem_cache_free+0x10d/0x4d0 [ 35.316295] rcu_core+0x8c8/0x2860 [ 35.316527] __do_softirq+0x1b7/0x7d4 [ 35.316778] [ 35.316895] Last potentially related work creation: [ 35.317196] kasan_save_stack+0x22/0x50 [ 35.317457] __kasan_record_aux_stack+0x8e/0xa0 [ 35.317758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.318108] remove_vma+0x139/0x170 [ 35.318344] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.318633] do_vmi_munmap+0x1f1/0x2b0 [ 35.318887] __vm_munmap+0x138/0x3a0 [ 35.319131] __x64_sys_munmap+0x59/0x80 [ 35.319394] do_syscall_64+0x3f/0x90 [ 35.319644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.319981] [ 35.320098] The buggy address belongs to the object at ffff88800e192d98 [ 35.320098] which belongs to the cache vm_area_struct of size 168 [ 35.320852] The buggy address is located 88 bytes inside of [ 35.320852] freed 168-byte region [ffff88800e192d98, ffff88800e192e40) [ 35.321578] [ 35.321694] The buggy address belongs to the physical page: [ 35.322032] page:000000004ecd36c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe192 [ 35.322598] memcg:ffff88800ded3d01 [ 35.322820] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.323180] page_type: 0xffffffff() [ 35.323415] raw: 0100000000000200 ffff88800879fc80 ffffea0000317840 dead000000000007 [ 35.323889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded3d01 [ 35.324355] page dumped because: kasan: bad access detected [ 35.324700] [ 35.324812] Memory state around the buggy address: [ 35.325113] ffff88800e192c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.325552] ffff88800e192d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.325988] >ffff88800e192d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.326440] ^ [ 35.326855] ffff88800e192e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.327300] ffff88800e192e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.327735] ================================================================== [ 35.328233] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.860047] BUG: Bad rss-counter state mm:000000009fb96a85 type:MM_FILEPAGES val:33 [ 36.860629] BUG: Bad rss-counter state mm:000000009fb96a85 type:MM_ANONPAGES val:22 [ 37.209515] BUG: Bad rss-counter state mm:00000000ebe60cd8 type:MM_FILEPAGES val:33 [ 37.210245] BUG: Bad rss-counter state mm:00000000ebe60cd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4916' (ECDSA) to the list of known hosts. 2023/06/20 08:11:45 fuzzer started 2023/06/20 08:11:45 dialing manager at localhost:44161 2023/06/20 08:11:45 checking machine... 2023/06/20 08:11:45 checking revisions... [ 37.745462] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:11:45 testing simple program... [ 37.789300] cgroup: Unknown subsys name 'net' [ 37.825408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:11:34 Registers: info registers vcpu 0 RAX=ffff8880167bf7e0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880167bf701 RSI=ffff8880167bf718 RDI=ffff8880167bf718 RBP=ffff8880167bf7a0 RSP=ffff8880167bf680 R8 =0000000000000001 R9 =ffff8880167bf788 R10=0000000000038001 R11=0000000000006097 R12=ffff8880167bf7a8 R13=ffff8880167bf790 R14=ffff8880167bf718 R15=ffff8880167bf748 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f33c4082900 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=00007ffecbe60000 CR3=0000000009726000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f3f771e31b8 CR3=000000001459c000 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=1e0a63976228bbbb63498b595261ebf6 XMM02=000000000011c7f0eff9b2d0a8fce9cb XMM03=000000000011c8c02c67c8bc2e329bc3 XMM04=297c80ff8569d82600000000000ae988 XMM05=dfcdbad4f1609c370000000000132b58 XMM06=806171799158d96700000000001329e0 XMM07=e042d86d42eb936e0000000000123528 XMM08=603edead7f0c13fa000000000011c8c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000