[ 23.709721] BUG: Bad rss-counter state mm:00000000223634d6 type:MM_FILEPAGES val:33 [ 23.710948] BUG: Bad rss-counter state mm:00000000223634d6 type:MM_ANONPAGES val:22 [ 23.746222] ================================================================== [ 23.746911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.747613] Read of size 8 at addr ffff8880196dd058 by task sshd/218 [ 23.748189] [ 23.748352] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.749004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.749737] Call Trace: [ 23.749980] [ 23.750197] dump_stack_lvl+0x91/0xf0 [ 23.750596] print_report+0xcc/0x620 [ 23.751054] ? __virt_addr_valid+0x102/0x340 [ 23.751541] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.752083] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.752551] kasan_report+0xbe/0xf0 [ 23.752914] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.753384] vma_interval_tree_remove+0xc75/0xec0 [ 23.753848] vma_prepare+0xc54/0x11a0 [ 23.754213] __split_vma+0x5af/0x950 [ 23.754577] ? __pfx___split_vma+0x10/0x10 [ 23.754983] ? find_held_lock+0x2c/0x110 [ 23.755381] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.755815] ? lock_is_held_type+0x9f/0x120 [ 23.756228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.756704] ? mtree_range_walk+0x632/0x900 [ 23.757132] ? mas_walk+0x5c7/0x7c0 [ 23.757501] do_vmi_munmap+0x1f1/0x2b0 [ 23.757880] mmap_region+0x1f9/0x2660 [ 23.758252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.758652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.759188] ? __pfx_lock_acquire+0x10/0x10 [ 23.759596] ? __pfx_mmap_region+0x10/0x10 [ 23.760006] ? security_mmap_addr+0x7d/0xa0 [ 23.760411] ? get_unmapped_area+0x1f5/0x3f0 [ 23.760824] do_mmap+0x854/0xf00 [ 23.761161] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.761542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.761975] ksys_mmap_pgoff+0x3af/0x500 [ 23.762363] do_syscall_64+0x3f/0x90 [ 23.762745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.763240] RIP: 0033:0x7f1693578d82 [ 23.763595] 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 [ 23.765230] RSP: 002b:00007ffe477868a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.765922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1693578d82 [ 23.766572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16929b2000 [ 23.767219] RBP: 00007f16929b2000 R08: 0000000000000009 R09: 0000000000001000 [ 23.767867] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557936387f70 [ 23.768530] R13: 00007ffe477868c0 R14: 00007ffe477868f0 R15: 00007ffe47786c50 [ 23.769188] [ 23.769413] [ 23.769578] Allocated by task 211: [ 23.769911] kasan_save_stack+0x22/0x50 [ 23.770295] kasan_set_track+0x25/0x30 [ 23.770685] __kasan_slab_alloc+0x59/0x70 [ 23.771086] kmem_cache_alloc+0x16b/0x370 [ 23.771481] vm_area_dup+0x20/0x160 [ 23.771830] __split_vma+0x170/0x950 [ 23.772185] split_vma+0xc6/0x110 [ 23.772521] mprotect_fixup+0x8d2/0xb30 [ 23.772912] do_mprotect_pkey+0x87e/0xd40 [ 23.773310] __x64_sys_mprotect+0x78/0xc0 [ 23.773714] do_syscall_64+0x3f/0x90 [ 23.774080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.774578] [ 23.774742] Freed by task 211: [ 23.775045] kasan_save_stack+0x22/0x50 [ 23.775426] kasan_set_track+0x25/0x30 [ 23.775809] kasan_save_free_info+0x2b/0x50 [ 23.776216] __kasan_slab_free+0x10a/0x190 [ 23.776631] kmem_cache_free+0x10d/0x4d0 [ 23.777019] rcu_core+0x8c8/0x2860 [ 23.777363] __do_softirq+0x1b7/0x7d4 [ 23.777729] [ 23.777896] Last potentially related work creation: [ 23.778340] kasan_save_stack+0x22/0x50 [ 23.778739] __kasan_record_aux_stack+0x8e/0xa0 [ 23.779175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.779672] remove_vma+0x139/0x170 [ 23.780016] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.780443] do_vmi_munmap+0x1f1/0x2b0 [ 23.780813] __vm_munmap+0x138/0x3a0 [ 23.781169] __x64_sys_munmap+0x59/0x80 [ 23.781550] do_syscall_64+0x3f/0x90 [ 23.781916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.782408] [ 23.782578] The buggy address belongs to the object at ffff8880196dd000 [ 23.782578] which belongs to the cache vm_area_struct of size 168 [ 23.783693] The buggy address is located 88 bytes inside of [ 23.783693] freed 168-byte region [ffff8880196dd000, ffff8880196dd0a8) [ 23.784768] [ 23.784935] The buggy address belongs to the physical page: [ 23.785429] page:0000000057163042 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196dd [ 23.786248] memcg:ffff88800ef02a01 [ 23.786574] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.787101] page_type: 0xffffffff() [ 23.787448] raw: 0100000000000200 ffff8880087a0c80 ffffea0000509580 0000000000000005 [ 23.788145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef02a01 [ 23.788831] page dumped because: kasan: bad access detected [ 23.789322] [ 23.789490] Memory state around the buggy address: [ 23.789931] ffff8880196dcf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 23.790589] ffff8880196dcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.791231] >ffff8880196dd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.791882] ^ [ 23.792434] ffff8880196dd080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 23.793077] ffff8880196dd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.793718] ================================================================== [ 23.794573] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.598085] BUG: Bad rss-counter state mm:0000000038ddaa28 type:MM_FILEPAGES val:33 [ 25.599368] BUG: Bad rss-counter state mm:0000000038ddaa28 type:MM_ANONPAGES val:22 [ 25.995875] BUG: Bad rss-counter state mm:000000001f0cf59a type:MM_FILEPAGES val:33 [ 25.997356] BUG: Bad rss-counter state mm:000000001f0cf59a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34351' (ECDSA) to the list of known hosts. 2023/06/21 01:08:02 fuzzer started 2023/06/21 01:08:03 dialing manager at localhost:36067 2023/06/21 01:08:03 checking machine... 2023/06/21 01:08:03 checking revisions... [ 26.751241] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:08:03 testing simple program... [ 26.786910] cgroup: Unknown subsys name 'net' [ 26.824130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:08:02 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000202 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffff88800d306130 RSP=ffff888008d77ae0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88800d3061c0 R13=ffff88800d306170 R14=0000000000000000 R15=ffff8880084418c0 RIP=ffffffff84511935 RFL=00000046 [---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 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=00007fcbb5096000 CR3=000000000d4e0000 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=2e2d971847356e8ff14e454c9916a4ae XMM02=000000000011a718d59e07bde36eea69 XMM03=000000000011a840ec2efd57dc4c00df XMM04=1c27339b59960e8a00000000000ae988 XMM05=7f0d20fab2c8b1950000000000132650 XMM06=bdf2e299e47b49d500000000001310d0 XMM07=fb795ef6d65770560000000000121660 XMM08=2c67c8bc2e329bc3000000000011a840 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000180 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800ebc9900 RBP=0000000000000001 RSP=ffff88800e12fc58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800ebc9900 R14=0000000000000cc0 R15=0000000000000000 RIP=ffffffff81828ca2 RFL=00000213 [----A-C] 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 00007fd1e27e6900 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=00007fd1e2d9b650 CR3=000000001894c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000