[ 33.804084] BUG: Bad rss-counter state mm:00000000f613344c type:MM_FILEPAGES val:33 [ 33.805868] BUG: Bad rss-counter state mm:00000000f613344c type:MM_ANONPAGES val:22 [ 33.973849] ================================================================== [ 33.974780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.975737] Read of size 8 at addr ffff88800e815df0 by task sshd/218 [ 33.976511] [ 33.976749] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.977693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.978677] Call Trace: [ 33.979021] [ 33.979311] dump_stack_lvl+0x91/0xf0 [ 33.979823] print_report+0xcc/0x620 [ 33.980323] ? __virt_addr_valid+0x102/0x340 [ 33.980893] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.981517] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.982145] kasan_report+0xbe/0xf0 [ 33.982635] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.983289] vma_interval_tree_remove+0xc75/0xec0 [ 33.983904] vma_prepare+0xc54/0x11a0 [ 33.984402] __split_vma+0x5af/0x950 [ 33.984924] ? __pfx___split_vma+0x10/0x10 [ 33.985637] ? find_held_lock+0x2c/0x110 [ 33.986344] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.987103] ? lock_is_held_type+0x9f/0x120 [ 33.987822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.988650] ? mtree_range_walk+0x632/0x900 [ 33.989392] ? mas_walk+0x5c7/0x7c0 [ 33.990026] do_vmi_munmap+0x1f1/0x2b0 [ 33.990649] mmap_region+0x1f9/0x2660 [ 33.991161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.991699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.992426] ? __pfx_lock_acquire+0x10/0x10 [ 33.992969] ? __pfx_mmap_region+0x10/0x10 [ 33.993501] ? security_mmap_addr+0x7d/0xa0 [ 33.994044] ? get_unmapped_area+0x1f5/0x3f0 [ 33.994605] do_mmap+0x854/0xf00 [ 33.995073] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.995574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.996175] ksys_mmap_pgoff+0x3af/0x500 [ 33.996713] do_syscall_64+0x3f/0x90 [ 33.997187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.997850] RIP: 0033:0x7f5bc2959d82 [ 33.998307] 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 [ 34.000496] RSP: 002b:00007ffe8a23b628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.001414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5bc2959d82 [ 34.002268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bc1d93000 [ 34.003137] RBP: 00007f5bc1d93000 R08: 0000000000000009 R09: 0000000000001000 [ 34.004000] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b06db1ec0 [ 34.004873] R13: 00007ffe8a23b640 R14: 00007ffe8a23b670 R15: 00007ffe8a23b9d0 [ 34.005742] [ 34.006032] [ 34.006247] Allocated by task 211: [ 34.006679] kasan_save_stack+0x22/0x50 [ 34.007204] kasan_set_track+0x25/0x30 [ 34.007716] __kasan_slab_alloc+0x59/0x70 [ 34.008267] kmem_cache_alloc+0x16b/0x370 [ 34.008804] vm_area_dup+0x20/0x160 [ 34.009262] __split_vma+0x170/0x950 [ 34.009740] split_vma+0xc6/0x110 [ 34.010178] mprotect_fixup+0x8d2/0xb30 [ 34.010689] do_mprotect_pkey+0x87e/0xd40 [ 34.011223] __x64_sys_mprotect+0x78/0xc0 [ 34.011763] do_syscall_64+0x3f/0x90 [ 34.012249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.012898] [ 34.013112] Freed by task 211: [ 34.013501] kasan_save_stack+0x22/0x50 [ 34.014017] kasan_set_track+0x25/0x30 [ 34.014509] kasan_save_free_info+0x2b/0x50 [ 34.015065] __kasan_slab_free+0x10a/0x190 [ 34.015605] kmem_cache_free+0x10d/0x4d0 [ 34.016123] rcu_core+0x8c8/0x2860 [ 34.016588] __do_softirq+0x1b7/0x7d4 [ 34.017078] [ 34.017292] Last potentially related work creation: [ 34.017947] kasan_save_stack+0x22/0x50 [ 34.018453] __kasan_record_aux_stack+0x8e/0xa0 [ 34.019061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.019718] remove_vma+0x139/0x170 [ 34.020188] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.020762] do_vmi_munmap+0x1f1/0x2b0 [ 34.021250] __vm_munmap+0x138/0x3a0 [ 34.021744] __x64_sys_munmap+0x59/0x80 [ 34.022248] do_syscall_64+0x3f/0x90 [ 34.022746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.023395] [ 34.023612] Second to last potentially related work creation: [ 34.024316] kasan_save_stack+0x22/0x50 [ 34.024843] __kasan_record_aux_stack+0x8e/0xa0 [ 34.025422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.026076] remove_vma+0x139/0x170 [ 34.026526] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.027110] do_vmi_munmap+0x1f1/0x2b0 [ 34.027598] mmap_region+0x1f9/0x2660 [ 34.028088] do_mmap+0x854/0xf00 [ 34.028542] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.029064] ksys_mmap_pgoff+0x3af/0x500 [ 34.029573] do_syscall_64+0x3f/0x90 [ 34.030064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.030720] [ 34.030944] The buggy address belongs to the object at ffff88800e815d98 [ 34.030944] which belongs to the cache vm_area_struct of size 168 [ 34.032436] The buggy address is located 88 bytes inside of [ 34.032436] freed 168-byte region [ffff88800e815d98, ffff88800e815e40) [ 34.033885] [ 34.034100] The buggy address belongs to the physical page: [ 34.034790] page:00000000c3a75624 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe815 [ 34.035895] memcg:ffff88800d1dcf01 [ 34.036326] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.036990] page_type: 0xffffffff() [ 34.037446] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.038381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1dcf01 [ 34.039326] page dumped because: kasan: bad access detected [ 34.039995] [ 34.040232] Memory state around the buggy address: [ 34.040824] ffff88800e815c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.041695] ffff88800e815d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.042549] >ffff88800e815d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.043424] ^ [ 34.044260] ffff88800e815e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.045131] ffff88800e815e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.046000] ================================================================== [ 34.047002] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.542266] BUG: Bad rss-counter state mm:00000000df0dfd48 type:MM_FILEPAGES val:33 [ 36.543527] BUG: Bad rss-counter state mm:00000000df0dfd48 type:MM_ANONPAGES val:22 [ 37.015255] BUG: Bad rss-counter state mm:000000002ce71f7e type:MM_FILEPAGES val:33 [ 37.016261] BUG: Bad rss-counter state mm:000000002ce71f7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16302' (ECDSA) to the list of known hosts. 2023/06/19 20:07:17 fuzzer started 2023/06/19 20:07:17 dialing manager at localhost:44161 2023/06/19 20:07:17 checking machine... 2023/06/19 20:07:17 checking revisions... [ 37.728901] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:07:17 testing simple program... [ 37.782741] cgroup: Unknown subsys name 'net' [ 37.820323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:07:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000ffffffff RCX=ffffffff8189c84c RDX=ffff8880145a9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f687c48 RSP=ffff88800f687ab0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff814c01fc 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 00007f522d193900 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=00007f45e17241d0 CR3=000000000e838000 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=37303a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383636 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f522d74b0b0 CR3=0000000016694000 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=2036313a37303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000