[ 24.430673] BUG: Bad rss-counter state mm:000000006644a847 type:MM_FILEPAGES val:33 [ 24.432858] BUG: Bad rss-counter state mm:000000006644a847 type:MM_ANONPAGES val:22 [ 24.602135] ================================================================== [ 24.603049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.603991] Read of size 8 at addr ffff88800e7e9d08 by task sshd/219 [ 24.604764] [ 24.604989] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.606005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.606977] Call Trace: [ 24.607298] [ 24.607605] dump_stack_lvl+0x91/0xf0 [ 24.608102] print_report+0xcc/0x620 [ 24.608582] ? __virt_addr_valid+0x102/0x340 [ 24.609140] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.609776] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.610403] kasan_report+0xbe/0xf0 [ 24.610878] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.611503] vma_interval_tree_remove+0xc75/0xec0 [ 24.612107] vma_prepare+0xc54/0x11a0 [ 24.612590] __split_vma+0x5af/0x950 [ 24.613067] ? __pfx___split_vma+0x10/0x10 [ 24.613612] ? find_held_lock+0x2c/0x110 [ 24.614148] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.614724] ? lock_is_held_type+0x9f/0x120 [ 24.615273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.615887] ? mtree_range_walk+0x632/0x900 [ 24.616443] ? mas_walk+0x5c7/0x7c0 [ 24.616924] do_vmi_munmap+0x1f1/0x2b0 [ 24.617445] mmap_region+0x1f9/0x2660 [ 24.617936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.618456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.619169] ? __pfx_lock_acquire+0x10/0x10 [ 24.619704] ? __pfx_mmap_region+0x10/0x10 [ 24.620235] ? security_mmap_addr+0x7d/0xa0 [ 24.620771] ? get_unmapped_area+0x1f5/0x3f0 [ 24.621339] do_mmap+0x854/0xf00 [ 24.621780] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.622279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.622849] ksys_mmap_pgoff+0x3af/0x500 [ 24.623353] do_syscall_64+0x3f/0x90 [ 24.623833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.624473] RIP: 0033:0x7f7c4a373d82 [ 24.624933] 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 [ 24.627116] RSP: 002b:00007ffebecede08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.628096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c4a373d82 [ 24.628968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c497ad000 [ 24.629845] RBP: 00007f7c497ad000 R08: 0000000000000009 R09: 0000000000001000 [ 24.630697] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f30905ec0 [ 24.631555] R13: 00007ffebecede20 R14: 00007ffebecede50 R15: 00007ffebecee1b0 [ 24.632423] [ 24.632722] [ 24.632942] Allocated by task 212: [ 24.633377] kasan_save_stack+0x22/0x50 [ 24.633887] kasan_set_track+0x25/0x30 [ 24.634391] __kasan_slab_alloc+0x59/0x70 [ 24.634921] kmem_cache_alloc+0x16b/0x370 [ 24.635453] vm_area_dup+0x20/0x160 [ 24.635914] __split_vma+0x170/0x950 [ 24.636389] split_vma+0xc6/0x110 [ 24.636832] mprotect_fixup+0x8d2/0xb30 [ 24.637355] do_mprotect_pkey+0x87e/0xd40 [ 24.637892] __x64_sys_mprotect+0x78/0xc0 [ 24.638418] do_syscall_64+0x3f/0x90 [ 24.638897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.639543] [ 24.639769] Freed by task 13: [ 24.640157] kasan_save_stack+0x22/0x50 [ 24.640659] kasan_set_track+0x25/0x30 [ 24.641156] kasan_save_free_info+0x2b/0x50 [ 24.641716] __kasan_slab_free+0x10a/0x190 [ 24.642261] kmem_cache_free+0x10d/0x4d0 [ 24.642775] rcu_core+0x8c8/0x2860 [ 24.643223] __do_softirq+0x1b7/0x7d4 [ 24.643698] [ 24.643914] Last potentially related work creation: [ 24.644500] kasan_save_stack+0x22/0x50 [ 24.645007] __kasan_record_aux_stack+0x8e/0xa0 [ 24.645596] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.646243] remove_vma+0x139/0x170 [ 24.646704] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.647278] do_vmi_munmap+0x1f1/0x2b0 [ 24.647770] __vm_munmap+0x138/0x3a0 [ 24.648243] __x64_sys_munmap+0x59/0x80 [ 24.648754] do_syscall_64+0x3f/0x90 [ 24.649241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.649887] [ 24.650103] Second to last potentially related work creation: [ 24.650818] kasan_save_stack+0x22/0x50 [ 24.651351] __kasan_record_aux_stack+0x8e/0xa0 [ 24.651936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.652578] remove_vma+0x139/0x170 [ 24.653049] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.653617] do_vmi_munmap+0x1f1/0x2b0 [ 24.654114] mmap_region+0x1f9/0x2660 [ 24.654600] do_mmap+0x854/0xf00 [ 24.655036] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.655529] ksys_mmap_pgoff+0x3af/0x500 [ 24.656037] do_syscall_64+0x3f/0x90 [ 24.656510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.657158] [ 24.657386] The buggy address belongs to the object at ffff88800e7e9cb0 [ 24.657386] which belongs to the cache vm_area_struct of size 168 [ 24.658859] The buggy address is located 88 bytes inside of [ 24.658859] freed 168-byte region [ffff88800e7e9cb0, ffff88800e7e9d58) [ 24.660274] [ 24.660488] The buggy address belongs to the physical page: [ 24.661159] page:00000000fb0ac289 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7e9 [ 24.662273] memcg:ffff88800e69bc01 [ 24.662702] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.663403] page_type: 0xffffffff() [ 24.663862] raw: 0100000000000200 ffff88800879fc80 ffffea0000665580 dead000000000005 [ 24.664791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e69bc01 [ 24.665751] page dumped because: kasan: bad access detected [ 24.666427] [ 24.666642] Memory state around the buggy address: [ 24.667228] ffff88800e7e9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.668098] ffff88800e7e9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.668959] >ffff88800e7e9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.669829] ^ [ 24.670269] ffff88800e7e9d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.671139] ffff88800e7e9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.672003] ================================================================== [ 24.673002] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.620718] BUG: Bad rss-counter state mm:00000000610ac51e type:MM_FILEPAGES val:33 [ 26.621761] BUG: Bad rss-counter state mm:00000000610ac51e type:MM_ANONPAGES val:22 [ 27.120605] BUG: Bad rss-counter state mm:00000000ceb5a26b type:MM_FILEPAGES val:33 [ 27.121801] BUG: Bad rss-counter state mm:00000000ceb5a26b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52450' (ECDSA) to the list of known hosts. 2023/06/19 18:19:57 fuzzer started 2023/06/19 18:19:57 dialing manager at localhost:44161 2023/06/19 18:19:57 checking machine... 2023/06/19 18:19:57 checking revisions... [ 27.834433] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:19:58 testing simple program... [ 27.880843] cgroup: Unknown subsys name 'net' [ 27.933752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:57 Registers: info registers vcpu 0 RAX=fffffffffba0fb12 RBX=ffffffff85dfca08 RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff88806ce099c0 R8 =ffffffff86137508 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca18 R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f461e6c9900 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=00007ffdae36c000 CR3=000000000dc78000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffff888008c58400 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=00007f50cf4e57d8 CR3=000000000c716000 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=4cd5f661c9eaf2bae94c562499436e1f XMM02=ec2efd57dc4c00df000000000011f880 XMM03=edb88e21fa8f69e7000000000011f950 XMM04=2ba328dfb0669feb00000000000ae988 XMM05=dfcdbad4f1609c370000000000134210 XMM06=806171799158d9670000000000134098 XMM07=e042d86d42eb936e0000000000123818 XMM08=edb88e21fa8f69e7000000000011f950 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000