[ 36.305966] BUG: Bad rss-counter state mm:00000000a6fc4eaf type:MM_FILEPAGES val:33 [ 36.306983] BUG: Bad rss-counter state mm:00000000a6fc4eaf type:MM_ANONPAGES val:22 [ 36.470361] ================================================================== [ 36.471297] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.472256] Read of size 8 at addr ffff88800d384058 by task sshd/219 [ 36.473030] [ 36.473336] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.474216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.475213] Call Trace: [ 36.475565] [ 36.475858] dump_stack_lvl+0x91/0xf0 [ 36.476358] print_report+0xcc/0x620 [ 36.476845] ? __virt_addr_valid+0x102/0x340 [ 36.477407] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.478034] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.478670] kasan_report+0xbe/0xf0 [ 36.479152] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.479786] vma_interval_tree_remove+0xc75/0xec0 [ 36.480396] vma_prepare+0xc54/0x11a0 [ 36.480895] __split_vma+0x5af/0x950 [ 36.481377] ? __pfx___split_vma+0x10/0x10 [ 36.481905] ? find_held_lock+0x2c/0x110 [ 36.482436] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.483013] ? lock_is_held_type+0x9f/0x120 [ 36.483595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.484204] ? mtree_range_walk+0x632/0x900 [ 36.484774] ? mas_walk+0x5c7/0x7c0 [ 36.485252] do_vmi_munmap+0x1f1/0x2b0 [ 36.485745] mmap_region+0x1f9/0x2660 [ 36.486240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.486758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.487498] ? __pfx_lock_acquire+0x10/0x10 [ 36.488031] ? __pfx_mmap_region+0x10/0x10 [ 36.488571] ? security_mmap_addr+0x7d/0xa0 [ 36.489101] ? get_unmapped_area+0x1f5/0x3f0 [ 36.489661] do_mmap+0x854/0xf00 [ 36.490110] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.490620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.491185] ksys_mmap_pgoff+0x3af/0x500 [ 36.491708] do_syscall_64+0x3f/0x90 [ 36.492183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.492839] RIP: 0033:0x7f768a816d82 [ 36.493301] 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 [ 36.495463] RSP: 002b:00007ffc9d8eefd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.496381] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f768a816d82 [ 36.497239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7689c50000 [ 36.498089] RBP: 00007f7689c50000 R08: 0000000000000009 R09: 0000000000001000 [ 36.498951] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a9f7b3ec0 [ 36.499813] R13: 00007ffc9d8eeff0 R14: 00007ffc9d8ef020 R15: 00007ffc9d8ef380 [ 36.500674] [ 36.500973] [ 36.501194] Allocated by task 212: [ 36.501624] kasan_save_stack+0x22/0x50 [ 36.502142] kasan_set_track+0x25/0x30 [ 36.502643] __kasan_slab_alloc+0x59/0x70 [ 36.503174] kmem_cache_alloc+0x16b/0x370 [ 36.503711] vm_area_dup+0x20/0x160 [ 36.504166] __split_vma+0x170/0x950 [ 36.504632] split_vma+0xc6/0x110 [ 36.505076] mprotect_fixup+0x8d2/0xb30 [ 36.505579] do_mprotect_pkey+0x87e/0xd40 [ 36.506105] __x64_sys_mprotect+0x78/0xc0 [ 36.506637] do_syscall_64+0x3f/0x90 [ 36.507118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.507765] [ 36.507984] Freed by task 203: [ 36.508377] kasan_save_stack+0x22/0x50 [ 36.508893] kasan_set_track+0x25/0x30 [ 36.509393] kasan_save_free_info+0x2b/0x50 [ 36.509927] __kasan_slab_free+0x10a/0x190 [ 36.510464] kmem_cache_free+0x10d/0x4d0 [ 36.510971] rcu_core+0x8c8/0x2860 [ 36.511438] __do_softirq+0x1b7/0x7d4 [ 36.511917] [ 36.512135] Last potentially related work creation: [ 36.512723] kasan_save_stack+0x22/0x50 [ 36.513231] __kasan_record_aux_stack+0x8e/0xa0 [ 36.513803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.514446] remove_vma+0x139/0x170 [ 36.514910] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.515476] do_vmi_munmap+0x1f1/0x2b0 [ 36.515965] __vm_munmap+0x138/0x3a0 [ 36.516438] __x64_sys_munmap+0x59/0x80 [ 36.516937] do_syscall_64+0x3f/0x90 [ 36.517426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.518079] [ 36.518295] The buggy address belongs to the object at ffff88800d384000 [ 36.518295] which belongs to the cache vm_area_struct of size 168 [ 36.519765] The buggy address is located 88 bytes inside of [ 36.519765] freed 168-byte region [ffff88800d384000, ffff88800d3840a8) [ 36.521161] [ 36.521378] The buggy address belongs to the physical page: [ 36.522053] page:00000000634e0d77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd384 [ 36.523148] memcg:ffff88800ddd5001 [ 36.523613] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.524266] page_type: 0xffffffff() [ 36.524722] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.525648] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd5001 [ 36.526553] page dumped because: kasan: bad access detected [ 36.527211] [ 36.527438] Memory state around the buggy address: [ 36.528021] ffff88800d383f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 36.528890] ffff88800d383f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.529752] >ffff88800d384000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.530625] ^ [ 36.531366] ffff88800d384080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 36.532241] ffff88800d384100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.533104] ================================================================== [ 36.534090] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.480045] BUG: Bad rss-counter state mm:0000000041965923 type:MM_FILEPAGES val:33 [ 38.481039] BUG: Bad rss-counter state mm:0000000041965923 type:MM_ANONPAGES val:22 [ 38.953186] BUG: Bad rss-counter state mm:0000000035ea2a00 type:MM_FILEPAGES val:33 [ 38.954210] BUG: Bad rss-counter state mm:0000000035ea2a00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27497' (ECDSA) to the list of known hosts. 2023/06/20 05:17:40 fuzzer started 2023/06/20 05:17:40 dialing manager at localhost:44161 2023/06/20 05:17:40 checking machine... 2023/06/20 05:17:40 checking revisions... [ 39.653578] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:17:40 testing simple program... [ 39.699742] cgroup: Unknown subsys name 'net' [ 39.753501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:17:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880145c7938 RCX=0000000000000001 RDX=1ffff110028b8f27 RSI=ffff8880145c7ca0 RDI=ffff8880145c7938 RBP=ffff8880145c7ca0 RSP=ffff8880145c7890 R8 =0000000000000001 R9 =ffff8880145c7978 R10=0000000000038001 R11=0000000000020de7 R12=0000000000000008 R13=ffff8880145c7980 R14=ffff8880145c7ca0 R15=ffff8880145c7938 RIP=ffffffff81130436 RFL=00000202 [-------] 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 00007f02dabad900 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=00007f02db1650b0 CR3=000000000f7ba000 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=2039333a37313a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37313a3530203032 XMM08=3d656e696c646d632022656369767265 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=00007fd6713ad620 CR3=000000000f2cc000 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=20d38800a719e3a67a4d500262220eae XMM02=2c67c8bc2e329bc3000000000011cc18 XMM03=fb795ef6d65770560000000000123aa0 XMM04=a33bd2a9044f627800000000000ae988 XMM05=dfcdbad4f1609c3700000000001332d8 XMM06=1650f0985582464300000000001324b0 XMM07=e042d86d42eb936e0000000000123d78 XMM08=47714dc384c9c0d4000000000011cc78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000