[ 23.729424] BUG: Bad rss-counter state mm:000000003b5bbd33 type:MM_FILEPAGES val:33 [ 23.730445] BUG: Bad rss-counter state mm:000000003b5bbd33 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.889713] ================================================================== [ 23.890625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.891563] Read of size 8 at addr ffff88800e6dfb38 by task sshd/219 [ 23.892334] [ 23.892555] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.893599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.894597] Call Trace: [ 23.894918] [ 23.895222] dump_stack_lvl+0x91/0xf0 [ 23.895718] print_report+0xcc/0x620 [ 23.896209] ? __virt_addr_valid+0x102/0x340 [ 23.896762] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.897381] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898014] kasan_report+0xbe/0xf0 [ 23.898499] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899126] vma_interval_tree_remove+0xc75/0xec0 [ 23.899733] vma_prepare+0xc54/0x11a0 [ 23.900219] __split_vma+0x5af/0x950 [ 23.900697] ? __pfx___split_vma+0x10/0x10 [ 23.901229] ? find_held_lock+0x2c/0x110 [ 23.901756] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.902331] ? lock_is_held_type+0x9f/0x120 [ 23.902874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.903486] ? mtree_range_walk+0x632/0x900 [ 23.904042] ? mas_walk+0x5c7/0x7c0 [ 23.904522] do_vmi_munmap+0x1f1/0x2b0 [ 23.905018] mmap_region+0x1f9/0x2660 [ 23.905508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.906041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.906759] ? __pfx_lock_acquire+0x10/0x10 [ 23.907304] ? __pfx_mmap_region+0x10/0x10 [ 23.907838] ? security_mmap_addr+0x7d/0xa0 [ 23.908375] ? get_unmapped_area+0x1f5/0x3f0 [ 23.908932] do_mmap+0x854/0xf00 [ 23.909372] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.909868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.910440] ksys_mmap_pgoff+0x3af/0x500 [ 23.910954] do_syscall_64+0x3f/0x90 [ 23.911442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.912099] RIP: 0033:0x7fc92c4ffd82 [ 23.912561] 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 [ 23.914724] RSP: 002b:00007ffff0b1aed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.915635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc92c4ffd82 [ 23.916495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc92b939000 [ 23.917361] RBP: 00007fc92b939000 R08: 0000000000000009 R09: 0000000000001000 [ 23.918223] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562853914d90 [ 23.919082] R13: 00007ffff0b1aef0 R14: 00007ffff0b1af20 R15: 00007ffff0b1b280 [ 23.919951] [ 23.920249] [ 23.920467] Allocated by task 212: [ 23.920904] kasan_save_stack+0x22/0x50 [ 23.921410] kasan_set_track+0x25/0x30 [ 23.921917] __kasan_slab_alloc+0x59/0x70 [ 23.922446] kmem_cache_alloc+0x16b/0x370 [ 23.922979] vm_area_dup+0x20/0x160 [ 23.923442] __split_vma+0x170/0x950 [ 23.923924] split_vma+0xc6/0x110 [ 23.924373] mprotect_fixup+0x8d2/0xb30 [ 23.924873] do_mprotect_pkey+0x87e/0xd40 [ 23.925392] __x64_sys_mprotect+0x78/0xc0 [ 23.925935] do_syscall_64+0x3f/0x90 [ 23.926414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.927065] [ 23.927284] Freed by task 212: [ 23.927682] kasan_save_stack+0x22/0x50 [ 23.928195] kasan_set_track+0x25/0x30 [ 23.928699] kasan_save_free_info+0x2b/0x50 [ 23.929231] __kasan_slab_free+0x10a/0x190 [ 23.929766] kmem_cache_free+0x10d/0x4d0 [ 23.930277] rcu_core+0x8c8/0x2860 [ 23.930721] __do_softirq+0x1b7/0x7d4 [ 23.931220] [ 23.931438] Last potentially related work creation: [ 23.932025] kasan_save_stack+0x22/0x50 [ 23.932537] __kasan_record_aux_stack+0x8e/0xa0 [ 23.933108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.933747] remove_vma+0x139/0x170 [ 23.934267] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.934831] do_vmi_munmap+0x1f1/0x2b0 [ 23.935324] __vm_munmap+0x138/0x3a0 [ 23.935801] __x64_sys_munmap+0x59/0x80 [ 23.936308] do_syscall_64+0x3f/0x90 [ 23.936785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.937432] [ 23.937650] Second to last potentially related work creation: [ 23.938355] kasan_save_stack+0x22/0x50 [ 23.938862] __kasan_record_aux_stack+0x8e/0xa0 [ 23.939437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.940075] remove_vma+0x139/0x170 [ 23.940525] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.941092] do_vmi_munmap+0x1f1/0x2b0 [ 23.941578] mmap_region+0x1f9/0x2660 [ 23.942066] do_mmap+0x854/0xf00 [ 23.942503] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.943002] ksys_mmap_pgoff+0x3af/0x500 [ 23.943503] do_syscall_64+0x3f/0x90 [ 23.943987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.944636] [ 23.944850] The buggy address belongs to the object at ffff88800e6dfae0 [ 23.944850] which belongs to the cache vm_area_struct of size 168 [ 23.946366] The buggy address is located 88 bytes inside of [ 23.946366] freed 168-byte region [ffff88800e6dfae0, ffff88800e6dfb88) [ 23.947793] [ 23.948013] The buggy address belongs to the physical page: [ 23.948673] page:00000000b70631b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6df [ 23.949762] memcg:ffff88800e6f8701 [ 23.950198] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.950852] page_type: 0xffffffff() [ 23.951305] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.952219] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6f8701 [ 23.953120] page dumped because: kasan: bad access detected [ 23.953782] [ 23.954026] Memory state around the buggy address: [ 23.954603] ffff88800e6dfa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.955466] ffff88800e6dfa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 23.956332] >ffff88800e6dfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.957175] ^ [ 23.957781] ffff88800e6dfb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.958639] ffff88800e6dfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.959484] ================================================================== [ 23.960509] Disabling lock debugging due to kernel taint [ 26.595407] BUG: Bad rss-counter state mm:000000000e673b33 type:MM_FILEPAGES val:33 [ 26.596386] BUG: Bad rss-counter state mm:000000000e673b33 type:MM_ANONPAGES val:22 [ 27.070945] BUG: Bad rss-counter state mm:0000000047cc30bb type:MM_FILEPAGES val:33 [ 27.071902] BUG: Bad rss-counter state mm:0000000047cc30bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64275' (ECDSA) to the list of known hosts. 2023/06/21 04:16:01 fuzzer started 2023/06/21 04:16:01 dialing manager at localhost:36067 2023/06/21 04:16:01 checking machine... 2023/06/21 04:16:01 checking revisions... [ 27.810133] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:16:01 testing simple program... [ 27.864324] cgroup: Unknown subsys name 'net' [ 27.970412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:16:00 Registers: info registers vcpu 0 RAX=ffffffff814c8454 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=ffff88801668d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015dcf978 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007fb05323fd77 R13=0000000000000000 R14=ffff88801668d1c0 R15=ffff88801bc502b0 RIP=ffffffff814c84a2 RFL=00000293 [--S-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 00007fb052d58900 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=0000556448df6954 CR3=000000000e66a000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=1ffff1100d9e135f RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b6d22 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09fe8 R15=ffff88806cf09a98 RIP=ffffffff811310d4 RFL=00000246 [---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 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=00007f46283e49f0 CR3=000000000cb04000 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=003da96d325a63806949c81b301824e7 XMM02=2c67c8bc2e329bc3000000000011a988 XMM03=fb795ef6d65770560000000000121810 XMM04=d5d6ac9c012c3a7d00000000000ae988 XMM05=dfcdbad4f1609c370000000000132938 XMM06=32c261682b6695f40000000000131b10 XMM07=e042d86d42eb936e0000000000121ae8 XMM08=a0e8a0fcb00adc99000000000011a9e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000