[ 25.442351] BUG: Bad rss-counter state mm:00000000fda99ea1 type:MM_FILEPAGES val:33 [ 25.443480] BUG: Bad rss-counter state mm:00000000fda99ea1 type:MM_ANONPAGES val:22 [ 25.614047] ================================================================== [ 25.615027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.616039] Read of size 8 at addr ffff88800e46b228 by task sshd/219 [ 25.616858] [ 25.617093] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.618217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.619254] Call Trace: [ 25.619598] [ 25.619904] dump_stack_lvl+0x91/0xf0 [ 25.620436] print_report+0xcc/0x620 [ 25.620952] ? __virt_addr_valid+0x102/0x340 [ 25.621574] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.622237] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.622910] kasan_report+0xbe/0xf0 [ 25.623420] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.624087] vma_interval_tree_remove+0xc75/0xec0 [ 25.624753] vma_prepare+0xc54/0x11a0 [ 25.625296] __split_vma+0x5af/0x950 [ 25.625814] ? __pfx___split_vma+0x10/0x10 [ 25.626398] ? find_held_lock+0x2c/0x110 [ 25.626973] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.627594] ? lock_is_held_type+0x9f/0x120 [ 25.628187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.628863] ? mtree_range_walk+0x632/0x900 [ 25.629481] ? mas_walk+0x5c7/0x7c0 [ 25.630003] do_vmi_munmap+0x1f1/0x2b0 [ 25.630542] mmap_region+0x1f9/0x2660 [ 25.631072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.631640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.632427] ? __pfx_lock_acquire+0x10/0x10 [ 25.633015] ? __pfx_mmap_region+0x10/0x10 [ 25.633616] ? security_mmap_addr+0x7d/0xa0 [ 25.634210] ? get_unmapped_area+0x1f5/0x3f0 [ 25.634819] do_mmap+0x854/0xf00 [ 25.635300] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.635847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.636470] ksys_mmap_pgoff+0x3af/0x500 [ 25.637026] do_syscall_64+0x3f/0x90 [ 25.637569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.638290] RIP: 0033:0x7f38c7a15d82 [ 25.638791] 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 [ 25.641147] RSP: 002b:00007ffe65c3f9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.642176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38c7a15d82 [ 25.643121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38c6e4f000 [ 25.644051] RBP: 00007f38c6e4f000 R08: 0000000000000009 R09: 0000000000001000 [ 25.644994] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586a18bdf70 [ 25.645936] R13: 00007ffe65c3f9e0 R14: 00007ffe65c3fa10 R15: 00007ffe65c3fd70 [ 25.646885] [ 25.647207] [ 25.647442] Allocated by task 212: [ 25.647915] kasan_save_stack+0x22/0x50 [ 25.648473] kasan_set_track+0x25/0x30 [ 25.649018] __kasan_slab_alloc+0x59/0x70 [ 25.649607] kmem_cache_alloc+0x16b/0x370 [ 25.650177] vm_area_dup+0x20/0x160 [ 25.650680] __split_vma+0x170/0x950 [ 25.651198] split_vma+0xc6/0x110 [ 25.651687] mprotect_fixup+0x8d2/0xb30 [ 25.652241] do_mprotect_pkey+0x87e/0xd40 [ 25.652822] __x64_sys_mprotect+0x78/0xc0 [ 25.653410] do_syscall_64+0x3f/0x90 [ 25.653931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.654631] [ 25.654868] Freed by task 212: [ 25.655300] kasan_save_stack+0x22/0x50 [ 25.655852] kasan_set_track+0x25/0x30 [ 25.656396] kasan_save_free_info+0x2b/0x50 [ 25.656985] __kasan_slab_free+0x10a/0x190 [ 25.657579] kmem_cache_free+0x10d/0x4d0 [ 25.658137] rcu_core+0x8c8/0x2860 [ 25.658685] __do_softirq+0x1b7/0x7d4 [ 25.659216] [ 25.659455] Last potentially related work creation: [ 25.660103] kasan_save_stack+0x22/0x50 [ 25.660659] __kasan_record_aux_stack+0x8e/0xa0 [ 25.661313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.662019] remove_vma+0x139/0x170 [ 25.662520] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.663136] do_vmi_munmap+0x1f1/0x2b0 [ 25.663674] __vm_munmap+0x138/0x3a0 [ 25.664182] __x64_sys_munmap+0x59/0x80 [ 25.664733] do_syscall_64+0x3f/0x90 [ 25.665263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.665971] [ 25.666210] The buggy address belongs to the object at ffff88800e46b1d0 [ 25.666210] which belongs to the cache vm_area_struct of size 168 [ 25.667828] The buggy address is located 88 bytes inside of [ 25.667828] freed 168-byte region [ffff88800e46b1d0, ffff88800e46b278) [ 25.669398] [ 25.669638] The buggy address belongs to the physical page: [ 25.670370] page:0000000086316793 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe46b [ 25.671630] memcg:ffff88800ce0fa01 [ 25.672102] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.672814] page_type: 0xffffffff() [ 25.673326] raw: 0100000000000200 ffff88800879fc80 ffffea000033ff40 dead000000000008 [ 25.674341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce0fa01 [ 25.675346] page dumped because: kasan: bad access detected [ 25.676076] [ 25.676316] Memory state around the buggy address: [ 25.676959] ffff88800e46b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.677904] ffff88800e46b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 25.678856] >ffff88800e46b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 25.679791] ^ [ 25.680404] ffff88800e46b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.681367] ffff88800e46b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.682312] ================================================================== [ 25.683413] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.510507] BUG: Bad rss-counter state mm:00000000c5d1895f type:MM_FILEPAGES val:33 [ 28.511586] BUG: Bad rss-counter state mm:00000000c5d1895f type:MM_ANONPAGES val:22 [ 29.048171] BUG: Bad rss-counter state mm:00000000d56c691c type:MM_FILEPAGES val:33 [ 29.049112] BUG: Bad rss-counter state mm:00000000d56c691c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42132' (ECDSA) to the list of known hosts. 2023/06/19 18:03:28 fuzzer started 2023/06/19 18:03:28 dialing manager at localhost:44161 2023/06/19 18:03:28 checking machine... 2023/06/19 18:03:28 checking revisions... [ 29.823014] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:03:28 testing simple program... [ 29.876821] cgroup: Unknown subsys name 'net' [ 29.913867] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:03:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffea00005f3100 RCX=ffffffff816a9bb5 RDX=1ffffd40000be620 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888008d5fa48 R8 =0000000000000000 R9 =fffff940000be620 R10=ffffea00005f3107 R11=0000000000000128 R12=ffffea00005f3134 R13=ffff88801b8272b8 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c0328 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 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=00007f4d3d791260 CR3=00000000192aa000 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=732e637072697462696c2f756e672d78 XMM02=00332e6f732e637072697462696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00007f4d3dd1df6000007f4d3db00f30 XMM06=00007f4d3db00a2000007f4d3db00510 XMM07=00007f4d3db0000000007f4d3dd1ea20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000ca52000 RBX=000000000ca52000 RCX=0000000000000000 RDX=000000000001c064 RSI=ffffffff82192958 RDI=0000000000000007 RBP=ffff88800f380000 RSP=ffff88800a1af7b8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c064 R11=0000000000000128 R12=000000000001c064 R13=ffff88800f3801a0 R14=ffff88800f380098 R15=dffffc0000000000 RIP=ffffffff8219295e RFL=00000093 [--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 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=00007f4d3d7da260 CR3=00000000192aa000 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=756e696c2d34365f3638782f62696c2f XMM01=2e766c6f73657262696c2f756e672d78 XMM02=00322e6f732e766c6f73657262696c2f XMM03=756e672d78756e696c2d34365f363878 XMM04=00000000000000000000000000000000 XMM05=00007f4d3dd1df6000007f4d3db00f30 XMM06=00007f4d3db00a2000007f4d3db00510 XMM07=00007f4d3db0000000007f4d3dd1ea20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000