[ 23.870185] BUG: Bad rss-counter state mm:0000000011d47362 type:MM_FILEPAGES val:33 [ 23.871018] BUG: Bad rss-counter state mm:0000000011d47362 type:MM_ANONPAGES val:22 [ 23.988450] ================================================================== [ 23.989496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.990571] Read of size 8 at addr ffff88801a380968 by task sshd/220 [ 23.991454] [ 23.991720] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.992890] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.993598] Call Trace: [ 23.993763] [ 23.993910] dump_stack_lvl+0x91/0xf0 [ 23.994166] print_report+0xcc/0x620 [ 23.994439] ? __virt_addr_valid+0x102/0x340 [ 23.994723] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.995037] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.995352] kasan_report+0xbe/0xf0 [ 23.995605] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.995922] vma_interval_tree_remove+0xc75/0xec0 [ 23.996231] vma_prepare+0xc54/0x11a0 [ 23.996476] __split_vma+0x5af/0x950 [ 23.996719] ? __pfx___split_vma+0x10/0x10 [ 23.996990] ? find_held_lock+0x2c/0x110 [ 23.997261] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.997555] ? lock_is_held_type+0x9f/0x120 [ 23.997833] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.998144] ? mtree_range_walk+0x632/0x900 [ 23.998431] ? mas_walk+0x5c7/0x7c0 [ 23.998677] do_vmi_munmap+0x1f1/0x2b0 [ 23.998930] mmap_region+0x1f9/0x2660 [ 23.999180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.999449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.999825] ? __pfx_lock_acquire+0x10/0x10 [ 24.000099] ? __pfx_mmap_region+0x10/0x10 [ 24.000371] ? security_mmap_addr+0x7d/0xa0 [ 24.000645] ? get_unmapped_area+0x1f5/0x3f0 [ 24.000927] do_mmap+0x854/0xf00 [ 24.001154] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.001407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.001696] ksys_mmap_pgoff+0x3af/0x500 [ 24.001957] do_syscall_64+0x3f/0x90 [ 24.002210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.002544] RIP: 0033:0x7f823baabd82 [ 24.002777] 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 [ 24.003868] RSP: 002b:00007fff212d9148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.004324] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f823baabd82 [ 24.004755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f823aee5000 [ 24.005184] RBP: 00007f823aee5000 R08: 0000000000000009 R09: 0000000000001000 [ 24.005615] R10: 0000000000000812 R11: 0000000000000206 R12: 000056397bd57f70 [ 24.006041] R13: 00007fff212d9160 R14: 00007fff212d9190 R15: 00007fff212d94f0 [ 24.006480] [ 24.006629] [ 24.006740] Allocated by task 207: [ 24.006959] kasan_save_stack+0x22/0x50 [ 24.007219] kasan_set_track+0x25/0x30 [ 24.007473] __kasan_slab_alloc+0x59/0x70 [ 24.007745] kmem_cache_alloc+0x16b/0x370 [ 24.008010] vm_area_dup+0x20/0x160 [ 24.008244] __split_vma+0x170/0x950 [ 24.008482] split_vma+0xc6/0x110 [ 24.008706] mprotect_fixup+0x8d2/0xb30 [ 24.008964] do_mprotect_pkey+0x87e/0xd40 [ 24.009231] __x64_sys_mprotect+0x78/0xc0 [ 24.009504] do_syscall_64+0x3f/0x90 [ 24.009748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.010075] [ 24.010187] Freed by task 207: [ 24.010387] kasan_save_stack+0x22/0x50 [ 24.010645] kasan_set_track+0x25/0x30 [ 24.010897] kasan_save_free_info+0x2b/0x50 [ 24.011170] __kasan_slab_free+0x10a/0x190 [ 24.011441] kmem_cache_free+0x10d/0x4d0 [ 24.011710] rcu_core+0x8c8/0x2860 [ 24.011939] __do_softirq+0x1b7/0x7d4 [ 24.012188] [ 24.012304] Last potentially related work creation: [ 24.012599] kasan_save_stack+0x22/0x50 [ 24.012855] __kasan_record_aux_stack+0x8e/0xa0 [ 24.013148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.013477] remove_vma+0x139/0x170 [ 24.013706] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.013988] do_vmi_munmap+0x1f1/0x2b0 [ 24.014236] __vm_munmap+0x138/0x3a0 [ 24.014473] __x64_sys_munmap+0x59/0x80 [ 24.014726] do_syscall_64+0x3f/0x90 [ 24.014971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.015302] [ 24.015416] The buggy address belongs to the object at ffff88801a380910 [ 24.015416] which belongs to the cache vm_area_struct of size 168 [ 24.016160] The buggy address is located 88 bytes inside of [ 24.016160] freed 168-byte region [ffff88801a380910, ffff88801a3809b8) [ 24.016872] [ 24.016984] The buggy address belongs to the physical page: [ 24.017319] page:0000000007394bfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a380 [ 24.017872] memcg:ffff88801a30ae01 [ 24.018089] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.018419] page_type: 0xffffffff() [ 24.018650] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.019113] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a30ae01 [ 24.019581] page dumped because: kasan: bad access detected [ 24.019915] [ 24.020026] Memory state around the buggy address: [ 24.020318] ffff88801a380800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.020747] ffff88801a380880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.021175] >ffff88801a380900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.021601] ^ [ 24.021991] ffff88801a380980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.022418] ffff88801a380a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.022845] ================================================================== [ 24.023300] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.159896] BUG: Bad rss-counter state mm:0000000016558b6f type:MM_FILEPAGES val:33 [ 26.160837] BUG: Bad rss-counter state mm:0000000016558b6f type:MM_ANONPAGES val:22 [ 26.613507] BUG: Bad rss-counter state mm:00000000a53a0a5a type:MM_FILEPAGES val:33 [ 26.614896] BUG: Bad rss-counter state mm:00000000a53a0a5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57438' (ECDSA) to the list of known hosts. 2023/06/20 15:04:52 fuzzer started 2023/06/20 15:04:52 dialing manager at localhost:36067 2023/06/20 15:04:52 checking machine... 2023/06/20 15:04:52 checking revisions... [ 27.297421] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:04:53 testing simple program... [ 27.335956] cgroup: Unknown subsys name 'net' [ 27.367277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:04:52 Registers: info registers vcpu 0 RAX=ffffffff8614e5bd RBX=0000000000000001 RCX=ffffffff8614e5b8 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800ed378c8 RSP=ffff88800ed37800 R8 =ffffffff8614e5bc R9 =ffff88800ed378b0 R10=0000000000038001 R11=00000000000246c8 R12=ffff88800ed378d0 R13=ffff88800ed378b8 R14=ffff88800ed378b1 R15=ffff88800ed37870 RIP=ffffffff81130abf 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 00007f4817f9e900 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=00007f4818555618 CR3=000000001883c000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f6596930b30 CR3=000000000ca72000 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=c69f500b7a11bcb6b84e809c903b8063 XMM02=000000000011b3d8ec2efd57dc4c00df XMM03=0000000000120980c152c5b1d4ed56c3 XMM04=5c5eaa2d2e9b290d00000000000ae988 XMM05=19e9129bd510f2350000000000131208 XMM06=4fda316b135da52b0000000000131090 XMM07=e042d86d42eb936e00000000001213c8 XMM08=c152c5b1d4ed56c3000000000011b438 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000