[ 23.953082] BUG: Bad rss-counter state mm:000000001e536df9 type:MM_FILEPAGES val:33 [ 23.954626] BUG: Bad rss-counter state mm:000000001e536df9 type:MM_ANONPAGES val:22 [ 24.083389] ================================================================== [ 24.084189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.084995] Read of size 8 at addr ffff88800e294df0 by task sshd/219 [ 24.085658] [ 24.085853] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.086598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.087551] Call Trace: [ 24.087829] [ 24.088080] dump_stack_lvl+0x91/0xf0 [ 24.088535] print_report+0xcc/0x620 [ 24.088973] ? __virt_addr_valid+0x102/0x340 [ 24.089444] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.089977] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.090505] kasan_report+0xbe/0xf0 [ 24.090914] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.091454] vma_interval_tree_remove+0xc75/0xec0 [ 24.091975] vma_prepare+0xc54/0x11a0 [ 24.092427] __split_vma+0x5af/0x950 [ 24.092837] ? __pfx___split_vma+0x10/0x10 [ 24.093309] ? find_held_lock+0x2c/0x110 [ 24.093763] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.094270] ? lock_is_held_type+0x9f/0x120 [ 24.094736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.095267] ? mtree_range_walk+0x632/0x900 [ 24.095740] ? mas_walk+0x5c7/0x7c0 [ 24.096174] do_vmi_munmap+0x1f1/0x2b0 [ 24.096605] mmap_region+0x1f9/0x2660 [ 24.097022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.097463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.098094] ? __pfx_lock_acquire+0x10/0x10 [ 24.098568] ? __pfx_mmap_region+0x10/0x10 [ 24.099031] ? security_mmap_addr+0x7d/0xa0 [ 24.099495] ? get_unmapped_area+0x1f5/0x3f0 [ 24.099972] do_mmap+0x854/0xf00 [ 24.100371] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.100819] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.101306] ksys_mmap_pgoff+0x3af/0x500 [ 24.101762] do_syscall_64+0x3f/0x90 [ 24.102188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.102765] RIP: 0033:0x7f9555330d82 [ 24.103164] 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 [ 24.105048] RSP: 002b:00007ffcb72d64f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.105857] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9555330d82 [ 24.106608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f955476a000 [ 24.107347] RBP: 00007f955476a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.108139] R10: 0000000000000812 R11: 0000000000000206 R12: 000055835a25dec0 [ 24.108912] R13: 00007ffcb72d6510 R14: 00007ffcb72d6540 R15: 00007ffcb72d68a0 [ 24.109693] [ 24.109960] [ 24.110153] Allocated by task 212: [ 24.110534] kasan_save_stack+0x22/0x50 [ 24.110990] kasan_set_track+0x25/0x30 [ 24.111435] __kasan_slab_alloc+0x59/0x70 [ 24.111899] kmem_cache_alloc+0x16b/0x370 [ 24.112364] vm_area_dup+0x20/0x160 [ 24.112769] __split_vma+0x170/0x950 [ 24.113189] split_vma+0xc6/0x110 [ 24.113584] mprotect_fixup+0x8d2/0xb30 [ 24.114029] do_mprotect_pkey+0x87e/0xd40 [ 24.114495] __x64_sys_mprotect+0x78/0xc0 [ 24.114961] do_syscall_64+0x3f/0x90 [ 24.115390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115965] [ 24.116172] Freed by task 203: [ 24.116536] kasan_save_stack+0x22/0x50 [ 24.116982] kasan_set_track+0x25/0x30 [ 24.117414] kasan_save_free_info+0x2b/0x50 [ 24.117884] __kasan_slab_free+0x10a/0x190 [ 24.118351] kmem_cache_free+0x10d/0x4d0 [ 24.118795] rcu_core+0x8c8/0x2860 [ 24.119187] __do_softirq+0x1b7/0x7d4 [ 24.119612] [ 24.119804] Last potentially related work creation: [ 24.120333] kasan_save_stack+0x22/0x50 [ 24.120781] __kasan_record_aux_stack+0x8e/0xa0 [ 24.121286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.121867] remove_vma+0x139/0x170 [ 24.122268] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.122760] do_vmi_munmap+0x1f1/0x2b0 [ 24.123188] __vm_munmap+0x138/0x3a0 [ 24.123615] __x64_sys_munmap+0x59/0x80 [ 24.124065] do_syscall_64+0x3f/0x90 [ 24.124499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.125070] [ 24.125258] The buggy address belongs to the object at ffff88800e294d98 [ 24.125258] which belongs to the cache vm_area_struct of size 168 [ 24.126574] The buggy address is located 88 bytes inside of [ 24.126574] freed 168-byte region [ffff88800e294d98, ffff88800e294e40) [ 24.127822] [ 24.128016] The buggy address belongs to the physical page: [ 24.128609] page:00000000f1ceb2e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe294 [ 24.129580] memcg:ffff88800e221701 [ 24.129966] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.130544] page_type: 0xffffffff() [ 24.130953] raw: 0100000000000200 ffff8880087a0c80 ffffea000037a4c0 dead000000000004 [ 24.131773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e221701 [ 24.132594] page dumped because: kasan: bad access detected [ 24.133185] [ 24.133377] Memory state around the buggy address: [ 24.133901] ffff88800e294c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.134671] ffff88800e294d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.135427] >ffff88800e294d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.136213] ^ [ 24.136941] ffff88800e294e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.137706] ffff88800e294e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.138482] ================================================================== [ 24.139430] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.035825] BUG: Bad rss-counter state mm:00000000cbd279f7 type:MM_FILEPAGES val:33 [ 26.037046] BUG: Bad rss-counter state mm:00000000cbd279f7 type:MM_ANONPAGES val:22 [ 26.477027] BUG: Bad rss-counter state mm:00000000bd8cfd0e type:MM_FILEPAGES val:33 [ 26.478016] BUG: Bad rss-counter state mm:00000000bd8cfd0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34945' (ECDSA) to the list of known hosts. 2023/06/20 13:05:14 fuzzer started 2023/06/20 13:05:14 dialing manager at localhost:36067 2023/06/20 13:05:14 checking machine... 2023/06/20 13:05:14 checking revisions... [ 27.152221] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:05:15 testing simple program... [ 27.200745] cgroup: Unknown subsys name 'net' [ 27.238721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:05:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001faaab7 RSI=ffffffff811f8c41 RDI=ffff88800fd555b8 RBP=ffff88800fd551c0 RSP=ffff88801428fee0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800fd551c0 R13=ffff88800d59e000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81374562 RFL=00000216 [----AP-] 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 00007f1b61f47900 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=00007f1b613777b0 CR3=00000000101ac000 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=39a44641faf17eb2f84cf72f5362eb8b XMM02=eff9b2d0a8fce9cb000000000011ad48 XMM03=2c67c8bc2e329bc3000000000011ae70 XMM04=50d31ff9975f50b600000000000ae988 XMM05=cec68b0b9c7c8af300000000001321e8 XMM06=b50efee588167d220000000000130c18 XMM07=fb795ef6d65770560000000000121120 XMM08=2c67c8bc2e329bc3000000000011ae70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffdcfc3dd58 CR3=00000000094f6000 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=2034313a35303a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000