[ 31.376088] BUG: Bad rss-counter state mm:000000002e4eb5ed type:MM_FILEPAGES val:33 [ 31.377081] BUG: Bad rss-counter state mm:000000002e4eb5ed type:MM_ANONPAGES val:22 [ 31.478366] ================================================================== [ 31.479413] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.480128] Read of size 8 at addr ffff88801bc23df0 by task sshd/221 [ 31.480771] [ 31.481015] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.481676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.482424] Call Trace: [ 31.482668] [ 31.482889] dump_stack_lvl+0x91/0xf0 [ 31.483283] print_report+0xcc/0x620 [ 31.483653] ? __virt_addr_valid+0x102/0x340 [ 31.484084] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.484554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.485030] kasan_report+0xbe/0xf0 [ 31.485397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.485869] vma_interval_tree_remove+0xc75/0xec0 [ 31.486346] vma_prepare+0xc54/0x11a0 [ 31.486716] __split_vma+0x5af/0x950 [ 31.487076] ? __pfx___split_vma+0x10/0x10 [ 31.487444] ? find_held_lock+0x2c/0x110 [ 31.487728] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.488040] ? lock_is_held_type+0x9f/0x120 [ 31.488337] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.488670] ? mtree_range_walk+0x632/0x900 [ 31.488968] ? mas_walk+0x5c7/0x7c0 [ 31.489229] do_vmi_munmap+0x1f1/0x2b0 [ 31.489503] mmap_region+0x1f9/0x2660 [ 31.489763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.490043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.490438] ? __pfx_lock_acquire+0x10/0x10 [ 31.490737] ? __pfx_mmap_region+0x10/0x10 [ 31.491027] ? security_mmap_addr+0x7d/0xa0 [ 31.491321] ? get_unmapped_area+0x1f5/0x3f0 [ 31.491623] do_mmap+0x854/0xf00 [ 31.491865] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.492137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.492462] ksys_mmap_pgoff+0x3af/0x500 [ 31.492744] do_syscall_64+0x3f/0x90 [ 31.493003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.493359] RIP: 0033:0x7fa361b0bd82 [ 31.493609] 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 [ 31.494778] RSP: 002b:00007ffcbed254d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.495277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa361b0bd82 [ 31.495747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa360f45000 [ 31.496212] RBP: 00007fa360f45000 R08: 0000000000000009 R09: 0000000000001000 [ 31.496672] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596213e6ec0 [ 31.497133] R13: 00007ffcbed254f0 R14: 00007ffcbed25520 R15: 00007ffcbed25880 [ 31.497601] [ 31.497761] [ 31.497880] Allocated by task 212: [ 31.498112] kasan_save_stack+0x22/0x50 [ 31.498401] kasan_set_track+0x25/0x30 [ 31.498675] __kasan_slab_alloc+0x59/0x70 [ 31.498959] kmem_cache_alloc+0x16b/0x370 [ 31.499243] vm_area_dup+0x20/0x160 [ 31.499502] __split_vma+0x170/0x950 [ 31.499757] split_vma+0xc6/0x110 [ 31.499997] mprotect_fixup+0x8d2/0xb30 [ 31.500275] do_mprotect_pkey+0x87e/0xd40 [ 31.500563] __x64_sys_mprotect+0x78/0xc0 [ 31.500847] do_syscall_64+0x3f/0x90 [ 31.501105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.501464] [ 31.501582] Freed by task 205: [ 31.501796] kasan_save_stack+0x22/0x50 [ 31.502071] kasan_set_track+0x25/0x30 [ 31.502349] kasan_save_free_info+0x2b/0x50 [ 31.502645] __kasan_slab_free+0x10a/0x190 [ 31.502938] kmem_cache_free+0x10d/0x4d0 [ 31.503222] rcu_core+0x8c8/0x2860 [ 31.503467] __do_softirq+0x1b7/0x7d4 [ 31.503730] [ 31.503848] Last potentially related work creation: [ 31.504170] kasan_save_stack+0x22/0x50 [ 31.504446] __kasan_record_aux_stack+0x8e/0xa0 [ 31.504762] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.505114] remove_vma+0x139/0x170 [ 31.505365] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.505675] do_vmi_munmap+0x1f1/0x2b0 [ 31.505944] __vm_munmap+0x138/0x3a0 [ 31.506201] __x64_sys_munmap+0x59/0x80 [ 31.506491] do_syscall_64+0x3f/0x90 [ 31.506750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.507105] [ 31.507223] The buggy address belongs to the object at ffff88801bc23d98 [ 31.507223] which belongs to the cache vm_area_struct of size 168 [ 31.508036] The buggy address is located 88 bytes inside of [ 31.508036] freed 168-byte region [ffff88801bc23d98, ffff88801bc23e40) [ 31.508818] [ 31.508936] The buggy address belongs to the physical page: [ 31.509299] page:00000000c9a18c83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc23 [ 31.509903] memcg:ffff888019bb6a01 [ 31.510137] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.510500] page_type: 0xffffffff() [ 31.510749] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.511257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bb6a01 [ 31.511765] page dumped because: kasan: bad access detected [ 31.512132] [ 31.512252] Memory state around the buggy address: [ 31.512570] ffff88801bc23c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.513042] ffff88801bc23d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.513510] >ffff88801bc23d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.513975] ^ [ 31.514432] ffff88801bc23e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.514908] ffff88801bc23e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.515380] ================================================================== [ 31.515881] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.212504] BUG: Bad rss-counter state mm:000000000dd32ece type:MM_FILEPAGES val:33 [ 33.213749] BUG: Bad rss-counter state mm:000000000dd32ece type:MM_ANONPAGES val:22 [ 33.760880] BUG: Bad rss-counter state mm:000000005beffa95 type:MM_FILEPAGES val:33 [ 33.762041] BUG: Bad rss-counter state mm:000000005beffa95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51044' (ECDSA) to the list of known hosts. 2023/06/19 21:03:54 fuzzer started 2023/06/19 21:03:55 dialing manager at localhost:44161 2023/06/19 21:03:55 checking machine... 2023/06/19 21:03:55 checking revisions... [ 34.390478] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:03:55 testing simple program... [ 34.428558] cgroup: Unknown subsys name 'net' [ 34.483630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:03:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fffb6b40b88 CR3=0000000005482000 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=00007fe6868f151000005604e5ebc790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 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=ffff888008c58400 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=00007f01592933d0 CR3=000000000d8c0000 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=2034353a33303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a33303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000