[ 31.692159] BUG: Bad rss-counter state mm:000000005a693d36 type:MM_FILEPAGES val:33 [ 31.693622] BUG: Bad rss-counter state mm:000000005a693d36 type:MM_ANONPAGES val:22 [ 31.836584] ================================================================== [ 31.837663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.838786] Read of size 8 at addr ffff88800cccedf0 by task sshd/219 [ 31.839781] [ 31.839997] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.840868] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.841853] Call Trace: [ 31.842169] [ 31.842450] dump_stack_lvl+0x91/0xf0 [ 31.842954] print_report+0xcc/0x620 [ 31.843436] ? __virt_addr_valid+0x102/0x340 [ 31.843993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.844616] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.845224] kasan_report+0xbe/0xf0 [ 31.845703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.846313] vma_interval_tree_remove+0xc75/0xec0 [ 31.846926] vma_prepare+0xc54/0x11a0 [ 31.847402] __split_vma+0x5af/0x950 [ 31.847867] ? __pfx___split_vma+0x10/0x10 [ 31.848388] ? find_held_lock+0x2c/0x110 [ 31.848907] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.849462] ? lock_is_held_type+0x9f/0x120 [ 31.849996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.850611] ? mtree_range_walk+0x632/0x900 [ 31.851157] ? mas_walk+0x5c7/0x7c0 [ 31.851626] do_vmi_munmap+0x1f1/0x2b0 [ 31.852113] mmap_region+0x1f9/0x2660 [ 31.852588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.853090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.853790] ? __pfx_lock_acquire+0x10/0x10 [ 31.854317] ? __pfx_mmap_region+0x10/0x10 [ 31.854850] ? security_mmap_addr+0x7d/0xa0 [ 31.855374] ? get_unmapped_area+0x1f5/0x3f0 [ 31.855916] do_mmap+0x854/0xf00 [ 31.856348] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.856833] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.857384] ksys_mmap_pgoff+0x3af/0x500 [ 31.857889] do_syscall_64+0x3f/0x90 [ 31.858362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859009] RIP: 0033:0x7fe5be48ed82 [ 31.859465] 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 [ 31.861580] RSP: 002b:00007ffedb690cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.862475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5be48ed82 [ 31.863328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5bd8c8000 [ 31.864168] RBP: 00007fe5bd8c8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.865000] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf02d64d90 [ 31.865832] R13: 00007ffedb690cd0 R14: 00007ffedb690d00 R15: 00007ffedb691060 [ 31.866686] [ 31.866979] [ 31.867191] Allocated by task 212: [ 31.867612] kasan_save_stack+0x22/0x50 [ 31.868110] kasan_set_track+0x25/0x30 [ 31.868597] __kasan_slab_alloc+0x59/0x70 [ 31.869124] kmem_cache_alloc+0x16b/0x370 [ 31.869641] vm_area_dup+0x20/0x160 [ 31.870094] __split_vma+0x170/0x950 [ 31.870581] split_vma+0xc6/0x110 [ 31.871023] mprotect_fixup+0x8d2/0xb30 [ 31.871529] do_mprotect_pkey+0x87e/0xd40 [ 31.872048] __x64_sys_mprotect+0x78/0xc0 [ 31.872571] do_syscall_64+0x3f/0x90 [ 31.873044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.873694] [ 31.873917] Freed by task 212: [ 31.874309] kasan_save_stack+0x22/0x50 [ 31.874831] kasan_set_track+0x25/0x30 [ 31.875328] kasan_save_free_info+0x2b/0x50 [ 31.875859] __kasan_slab_free+0x10a/0x190 [ 31.876388] kmem_cache_free+0x10d/0x4d0 [ 31.876889] rcu_core+0x8c8/0x2860 [ 31.877339] __do_softirq+0x1b7/0x7d4 [ 31.877829] [ 31.878046] Last potentially related work creation: [ 31.878643] kasan_save_stack+0x22/0x50 [ 31.879139] __kasan_record_aux_stack+0x8e/0xa0 [ 31.879708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.880341] remove_vma+0x139/0x170 [ 31.880789] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.881341] do_vmi_munmap+0x1f1/0x2b0 [ 31.881820] __vm_munmap+0x138/0x3a0 [ 31.882283] __x64_sys_munmap+0x59/0x80 [ 31.882819] do_syscall_64+0x3f/0x90 [ 31.883291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.883941] [ 31.884156] The buggy address belongs to the object at ffff88800ccced98 [ 31.884156] which belongs to the cache vm_area_struct of size 168 [ 31.885619] The buggy address is located 88 bytes inside of [ 31.885619] freed 168-byte region [ffff88800ccced98, ffff88800cccee40) [ 31.887023] [ 31.887237] The buggy address belongs to the physical page: [ 31.887888] page:000000007c92fecb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xccce [ 31.888968] memcg:ffff88800d3fb801 [ 31.889389] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.890085] page_type: 0xffffffff() [ 31.890550] raw: 0100000000000200 ffff8880087a0c80 ffffea000035dac0 0000000000000009 [ 31.891468] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3fb801 [ 31.892367] page dumped because: kasan: bad access detected [ 31.893019] [ 31.893235] Memory state around the buggy address: [ 31.893805] ffff88800cccec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.894668] ffff88800ccced00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.895514] >ffff88800ccced80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.896350] ^ [ 31.897154] ffff88800cccee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.897999] ffff88800cccee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.898848] ================================================================== [ 31.899831] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.365708] BUG: Bad rss-counter state mm:00000000b66e66c0 type:MM_FILEPAGES val:33 [ 34.367156] BUG: Bad rss-counter state mm:00000000b66e66c0 type:MM_ANONPAGES val:22 [ 34.838499] BUG: Bad rss-counter state mm:00000000a35c8c00 type:MM_FILEPAGES val:33 [ 34.839031] BUG: Bad rss-counter state mm:00000000a35c8c00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63996' (ECDSA) to the list of known hosts. 2023/06/21 05:54:18 fuzzer started 2023/06/21 05:54:19 dialing manager at localhost:36067 2023/06/21 05:54:19 checking machine... 2023/06/21 05:54:19 checking revisions... [ 35.500923] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:54:19 testing simple program... [ 35.558989] cgroup: Unknown subsys name 'net' [ 35.604489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc068f54da0 CR3=000000000c9e2000 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=7fb7ecc500632fad0d4a1d3f1eef2ba0 XMM02=000000000011aac0eff9b2d0a8fce9cb XMM03=000000000011ab902c67c8bc2e329bc3 XMM04=61a4af8ef52dd11c00000000000ae988 XMM05=dfcdbad4f1609c370000000000130ff0 XMM06=021b088ffa400acb00000000001301c8 XMM07=e042d86d42eb936e0000000000121750 XMM08=9d01d6e7b05de2a4000000000011ab90 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=ffff888008c04400 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=00007f7932358618 CR3=000000000e252000 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=2038313a34353a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a34353a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000