[ 25.578329] BUG: Bad rss-counter state mm:000000001bec6a23 type:MM_FILEPAGES val:33 [ 25.579557] BUG: Bad rss-counter state mm:000000001bec6a23 type:MM_ANONPAGES val:22 [ 25.618790] ================================================================== [ 25.619790] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.620726] Read of size 8 at addr ffff88801411d140 by task sshd/219 [ 25.621498] [ 25.621715] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.622581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.623568] Call Trace: [ 25.623886] [ 25.624182] dump_stack_lvl+0x91/0xf0 [ 25.624676] print_report+0xcc/0x620 [ 25.625155] ? __virt_addr_valid+0x102/0x340 [ 25.625711] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.626341] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.626970] kasan_report+0xbe/0xf0 [ 25.627445] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.628076] vma_interval_tree_remove+0xc75/0xec0 [ 25.628679] vma_prepare+0xc54/0x11a0 [ 25.629160] __split_vma+0x5af/0x950 [ 25.629634] ? __pfx___split_vma+0x10/0x10 [ 25.630163] ? find_held_lock+0x2c/0x110 [ 25.630712] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.631274] ? lock_is_held_type+0x9f/0x120 [ 25.631810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.632419] ? mtree_range_walk+0x632/0x900 [ 25.632970] ? mas_walk+0x5c7/0x7c0 [ 25.633452] do_vmi_munmap+0x1f1/0x2b0 [ 25.633946] mmap_region+0x1f9/0x2660 [ 25.634429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.634954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.635683] ? __pfx_lock_acquire+0x10/0x10 [ 25.636208] ? __pfx_mmap_region+0x10/0x10 [ 25.636748] ? security_mmap_addr+0x7d/0xa0 [ 25.637282] ? get_unmapped_area+0x1f5/0x3f0 [ 25.637833] do_mmap+0x854/0xf00 [ 25.638278] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.638783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.639351] ksys_mmap_pgoff+0x3af/0x500 [ 25.639866] do_syscall_64+0x3f/0x90 [ 25.640345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.640993] RIP: 0033:0x7f7d756f8d82 [ 25.641456] 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 [ 25.643668] RSP: 002b:00007ffcb1a651a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.644606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d756f8d82 [ 25.645666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d74b32000 [ 25.646539] RBP: 00007f7d74b32000 R08: 0000000000000009 R09: 0000000000001000 [ 25.647422] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3cefbbf60 [ 25.648281] R13: 00007ffcb1a651c0 R14: 00007ffcb1a651f0 R15: 00007ffcb1a65550 [ 25.649159] [ 25.649449] [ 25.649665] Allocated by task 211: [ 25.650095] kasan_save_stack+0x22/0x50 [ 25.650634] kasan_set_track+0x25/0x30 [ 25.651142] __kasan_slab_alloc+0x59/0x70 [ 25.651668] kmem_cache_alloc+0x16b/0x370 [ 25.652198] vm_area_dup+0x20/0x160 [ 25.652653] __split_vma+0x170/0x950 [ 25.653118] split_vma+0xc6/0x110 [ 25.653557] mprotect_fixup+0x8d2/0xb30 [ 25.654061] do_mprotect_pkey+0x87e/0xd40 [ 25.654588] __x64_sys_mprotect+0x78/0xc0 [ 25.655110] do_syscall_64+0x3f/0x90 [ 25.655586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.656232] [ 25.656446] Freed by task 211: [ 25.656839] kasan_save_stack+0x22/0x50 [ 25.657341] kasan_set_track+0x25/0x30 [ 25.657834] kasan_save_free_info+0x2b/0x50 [ 25.658379] __kasan_slab_free+0x10a/0x190 [ 25.658926] kmem_cache_free+0x10d/0x4d0 [ 25.659442] rcu_core+0x8c8/0x2860 [ 25.659891] __do_softirq+0x1b7/0x7d4 [ 25.660383] [ 25.660602] Last potentially related work creation: [ 25.661190] kasan_save_stack+0x22/0x50 [ 25.661693] __kasan_record_aux_stack+0x8e/0xa0 [ 25.662270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.662939] remove_vma+0x139/0x170 [ 25.663396] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.663955] do_vmi_munmap+0x1f1/0x2b0 [ 25.664441] __vm_munmap+0x138/0x3a0 [ 25.664913] __x64_sys_munmap+0x59/0x80 [ 25.665421] do_syscall_64+0x3f/0x90 [ 25.665903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.666549] [ 25.666766] Second to last potentially related work creation: [ 25.667446] kasan_save_stack+0x22/0x50 [ 25.667948] __kasan_record_aux_stack+0x8e/0xa0 [ 25.668530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.669170] remove_vma+0x139/0x170 [ 25.669630] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.670185] do_vmi_munmap+0x1f1/0x2b0 [ 25.670691] mmap_region+0x1f9/0x2660 [ 25.671166] do_mmap+0x854/0xf00 [ 25.671600] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.672089] ksys_mmap_pgoff+0x3af/0x500 [ 25.672595] do_syscall_64+0x3f/0x90 [ 25.673067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.673708] [ 25.673929] The buggy address belongs to the object at ffff88801411d0e8 [ 25.673929] which belongs to the cache vm_area_struct of size 168 [ 25.675413] The buggy address is located 88 bytes inside of [ 25.675413] freed 168-byte region [ffff88801411d0e8, ffff88801411d190) [ 25.676805] [ 25.677022] The buggy address belongs to the physical page: [ 25.677679] page:00000000355956b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1411d [ 25.678812] memcg:ffff88800e1a7d01 [ 25.679248] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.679952] page_type: 0xffffffff() [ 25.680407] raw: 0100000000000200 ffff88800879fc80 ffffea00003a9740 dead000000000005 [ 25.681346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1a7d01 [ 25.682260] page dumped because: kasan: bad access detected [ 25.682929] [ 25.683154] Memory state around the buggy address: [ 25.683730] ffff88801411d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.684583] ffff88801411d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 25.685467] >ffff88801411d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.686349] ^ [ 25.687004] ffff88801411d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 25.687869] ffff88801411d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.688711] ================================================================== [ 25.689765] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.701910] BUG: Bad rss-counter state mm:00000000916ce657 type:MM_FILEPAGES val:33 [ 27.703123] BUG: Bad rss-counter state mm:00000000916ce657 type:MM_ANONPAGES val:22 [ 28.079624] BUG: Bad rss-counter state mm:00000000016e866c type:MM_FILEPAGES val:33 [ 28.080236] BUG: Bad rss-counter state mm:00000000016e866c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12169' (ECDSA) to the list of known hosts. 2023/06/19 22:12:21 fuzzer started 2023/06/19 22:12:21 dialing manager at localhost:44161 2023/06/19 22:12:21 checking machine... 2023/06/19 22:12:21 checking revisions... [ 28.848116] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:12:21 testing simple program... [ 28.894961] cgroup: Unknown subsys name 'net' [ 28.930858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:19 Registers: info registers vcpu 0 RAX=ffffea00003f8800 RBX=0000000000082cc0 RCX=ffffffff812d869a RDX=dffffc0000000000 RSI=0000000000082cc0 RDI=0000000000036880 RBP=ffff88800f847568 RSP=ffff88800f847510 R8 =ffff88800fe26000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008442140 R13=0000000000082cc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ad5e RFL=00000286 [--S--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 00007fc7cb33d900 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=00007fc7cb8f4618 CR3=000000000ec44000 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=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=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=00007ff1dca70170 CR3=000000000ca0c000 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=f9dddd0b77e0d3b51640d0c5c6feab69 XMM02=2c67c8bc2e329bc3000000000011c5c8 XMM03=fb795ef6d65770560000000000123010 XMM04=90b6a14d1bf907cc00000000000ae988 XMM05=2720864fadd429f800000000001348e8 XMM06=806171799158d9670000000000133a88 XMM07=e042d86d42eb936e0000000000123290 XMM08=01207cf1a846203d000000000011c628 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000