[ 55.783569] BUG: Bad rss-counter state mm:00000000a763b8d7 type:MM_FILEPAGES val:33 [ 55.784925] BUG: Bad rss-counter state mm:00000000a763b8d7 type:MM_ANONPAGES val:22 [ 55.838447] ================================================================== [ 55.839857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.841289] Read of size 8 at addr ffff88801650fd08 by task sshd/220 [ 55.842073] [ 55.842285] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.843141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.844104] Call Trace: [ 55.844652] [ 55.845041] dump_stack_lvl+0x91/0xf0 [ 55.845602] print_report+0xcc/0x620 [ 55.846063] ? __virt_addr_valid+0x102/0x340 [ 55.846643] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.847277] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.847914] kasan_report+0xbe/0xf0 [ 55.848396] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.849087] vma_interval_tree_remove+0xc75/0xec0 [ 55.849726] vma_prepare+0xc54/0x11a0 [ 55.850211] __split_vma+0x5af/0x950 [ 55.850731] ? __pfx___split_vma+0x10/0x10 [ 55.851273] ? find_held_lock+0x2c/0x110 [ 55.851827] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.852390] ? lock_is_held_type+0x9f/0x120 [ 55.852924] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.853498] ? mtree_range_walk+0x632/0x900 [ 55.854051] ? mas_walk+0x5c7/0x7c0 [ 55.854501] do_vmi_munmap+0x1f1/0x2b0 [ 55.854984] mmap_region+0x1f9/0x2660 [ 55.855443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.855941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.856621] ? __pfx_lock_acquire+0x10/0x10 [ 55.857151] ? __pfx_mmap_region+0x10/0x10 [ 55.857662] ? security_mmap_addr+0x7d/0xa0 [ 55.858160] ? get_unmapped_area+0x1f5/0x3f0 [ 55.858711] do_mmap+0x854/0xf00 [ 55.859132] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.859612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.860140] ksys_mmap_pgoff+0x3af/0x500 [ 55.860632] do_syscall_64+0x3f/0x90 [ 55.861126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.861820] RIP: 0033:0x7f6027454d82 [ 55.862300] 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 [ 55.864375] RSP: 002b:00007ffce8f744c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.865252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6027454d82 [ 55.866061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f602688e000 [ 55.866864] RBP: 00007f602688e000 R08: 0000000000000009 R09: 0000000000001000 [ 55.867679] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acb9a8d980 [ 55.868474] R13: 00007ffce8f744e0 R14: 00007ffce8f74510 R15: 00007ffce8f74870 [ 55.869327] [ 55.869616] [ 55.869821] Allocated by task 213: [ 55.870223] kasan_save_stack+0x22/0x50 [ 55.870715] kasan_set_track+0x25/0x30 [ 55.871188] __kasan_slab_alloc+0x59/0x70 [ 55.871689] kmem_cache_alloc+0x16b/0x370 [ 55.872178] vm_area_dup+0x20/0x160 [ 55.872613] __split_vma+0x170/0x950 [ 55.873078] split_vma+0xc6/0x110 [ 55.873492] mprotect_fixup+0x8d2/0xb30 [ 55.874033] do_mprotect_pkey+0x87e/0xd40 [ 55.874579] __x64_sys_mprotect+0x78/0xc0 [ 55.875109] do_syscall_64+0x3f/0x90 [ 55.875594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.876243] [ 55.876462] Freed by task 213: [ 55.876877] kasan_save_stack+0x22/0x50 [ 55.877401] kasan_set_track+0x25/0x30 [ 55.877920] kasan_save_free_info+0x2b/0x50 [ 55.878464] __kasan_slab_free+0x10a/0x190 [ 55.879037] kmem_cache_free+0x10d/0x4d0 [ 55.879580] rcu_core+0x8c8/0x2860 [ 55.880032] __do_softirq+0x1b7/0x7d4 [ 55.880514] [ 55.880746] Last potentially related work creation: [ 55.881370] kasan_save_stack+0x22/0x50 [ 55.881900] __kasan_record_aux_stack+0x8e/0xa0 [ 55.882499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.883159] remove_vma+0x139/0x170 [ 55.883646] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.884214] do_vmi_munmap+0x1f1/0x2b0 [ 55.884721] __vm_munmap+0x138/0x3a0 [ 55.885221] __x64_sys_munmap+0x59/0x80 [ 55.885741] do_syscall_64+0x3f/0x90 [ 55.886215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.886874] [ 55.887089] The buggy address belongs to the object at ffff88801650fcb0 [ 55.887089] which belongs to the cache vm_area_struct of size 168 [ 55.888581] The buggy address is located 88 bytes inside of [ 55.888581] freed 168-byte region [ffff88801650fcb0, ffff88801650fd58) [ 55.890287] [ 55.890504] The buggy address belongs to the physical page: [ 55.891184] page:000000001f99a372 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1650f [ 55.892282] memcg:ffff888018791801 [ 55.892726] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.893391] page_type: 0xffffffff() [ 55.893883] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 55.894813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018791801 [ 55.895727] page dumped because: kasan: bad access detected [ 55.896387] [ 55.896619] Memory state around the buggy address: [ 55.897214] ffff88801650fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 55.898082] ffff88801650fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 55.898975] >ffff88801650fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 55.899854] ^ [ 55.900301] ffff88801650fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 55.901202] ffff88801650fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 55.902077] ================================================================== [ 55.903067] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.937138] BUG: Bad rss-counter state mm:00000000a09bece3 type:MM_FILEPAGES val:33 [ 57.937899] BUG: Bad rss-counter state mm:00000000a09bece3 type:MM_ANONPAGES val:22 [ 58.369867] BUG: Bad rss-counter state mm:00000000e67cd8f6 type:MM_FILEPAGES val:33 [ 58.371135] BUG: Bad rss-counter state mm:00000000e67cd8f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44269' (ECDSA) to the list of known hosts. 2023/06/19 21:20:48 fuzzer started 2023/06/19 21:20:49 dialing manager at localhost:44161 2023/06/19 21:20:49 checking machine... 2023/06/19 21:20:49 checking revisions... [ 59.165161] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:20:49 testing simple program... [ 59.213633] cgroup: Unknown subsys name 'net' [ 59.261655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:20:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff888016ba7638 RSP=ffff888016ba7570 R8 =0000000000000001 R9 =ffffed1002d74eba R10=ffff888016ba75d7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f3da4c64900 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=00007f1edfb37650 CR3=000000000d610000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=86dd0f9c5b64c7c100000000000ae988 XMM05=34afac6044037c1700000000001351b8 XMM06=06e1d1d485abc5dc0000000000133be8 XMM07=fb795ef6d657705600000000001243f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f1a0000 RBX=0000000000000000 RCX=0000000080020002 RDX=0000000000020000 RSI=0000000000000004 RDI=ffff88800de3f460 RBP=ffff88800de3f5a0 RSP=ffff88800de3f4f0 R8 =0000000080020002 R9 =ffff888008442280 R10=0000000000000003 R11=ffff88800f1a0000 R12=ffffea00003c6800 R13=ffffea00003f3000 R14=ffff888008442280 R15=0000000000000000 RIP=ffffffff818069b7 RFL=00000042 [---Z---] 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 00007f1edf582900 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=00007f1edfb39618 CR3=000000001bbde000 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=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