[ 26.885568] BUG: Bad rss-counter state mm:00000000d2eb305f type:MM_FILEPAGES val:33 [ 26.888741] BUG: Bad rss-counter state mm:00000000d2eb305f type:MM_ANONPAGES val:22 [ 27.052175] ================================================================== [ 27.053269] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.054427] Read of size 8 at addr ffff88800de17880 by task sshd/219 [ 27.055468] [ 27.055727] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.056758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.057934] Call Trace: [ 27.058308] [ 27.058672] dump_stack_lvl+0x91/0xf0 [ 27.059254] print_report+0xcc/0x620 [ 27.059819] ? __virt_addr_valid+0x102/0x340 [ 27.060473] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.061211] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.061953] kasan_report+0xbe/0xf0 [ 27.062527] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.063271] vma_interval_tree_remove+0xc75/0xec0 [ 27.063993] vma_prepare+0xc54/0x11a0 [ 27.064567] __split_vma+0x5af/0x950 [ 27.065133] ? __pfx___split_vma+0x10/0x10 [ 27.065763] ? find_held_lock+0x2c/0x110 [ 27.066392] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.067073] ? lock_is_held_type+0x9f/0x120 [ 27.067722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.068454] ? mtree_range_walk+0x632/0x900 [ 27.069114] ? mas_walk+0x5c7/0x7c0 [ 27.069673] do_vmi_munmap+0x1f1/0x2b0 [ 27.070262] mmap_region+0x1f9/0x2660 [ 27.070859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.071472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.072333] ? __pfx_lock_acquire+0x10/0x10 [ 27.072978] ? __pfx_mmap_region+0x10/0x10 [ 27.073613] ? security_mmap_addr+0x7d/0xa0 [ 27.074251] ? get_unmapped_area+0x1f5/0x3f0 [ 27.074912] do_mmap+0x854/0xf00 [ 27.075429] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.076019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.076695] ksys_mmap_pgoff+0x3af/0x500 [ 27.077301] do_syscall_64+0x3f/0x90 [ 27.077866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.078680] RIP: 0033:0x7fa38817ad82 [ 27.079218] 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 [ 27.081246] RSP: 002b:00007ffe8e841088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.082101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa38817ad82 [ 27.082904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3875b4000 [ 27.083702] RBP: 00007fa3875b4000 R08: 0000000000000009 R09: 0000000000001000 [ 27.084497] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fdc876dec0 [ 27.085292] R13: 00007ffe8e8410a0 R14: 00007ffe8e8410d0 R15: 00007ffe8e841430 [ 27.086099] [ 27.086377] [ 27.086582] Allocated by task 212: [ 27.087000] kasan_save_stack+0x22/0x50 [ 27.087491] kasan_set_track+0x25/0x30 [ 27.087977] __kasan_slab_alloc+0x59/0x70 [ 27.088497] kmem_cache_alloc+0x16b/0x370 [ 27.089018] vm_area_dup+0x20/0x160 [ 27.089461] __split_vma+0x170/0x950 [ 27.089919] split_vma+0xc6/0x110 [ 27.090348] mprotect_fixup+0x8d2/0xb30 [ 27.090858] do_mprotect_pkey+0x87e/0xd40 [ 27.091370] __x64_sys_mprotect+0x78/0xc0 [ 27.091884] do_syscall_64+0x3f/0x90 [ 27.092356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.092993] [ 27.093201] Freed by task 210: [ 27.093583] kasan_save_stack+0x22/0x50 [ 27.094087] kasan_set_track+0x25/0x30 [ 27.094580] kasan_save_free_info+0x2b/0x50 [ 27.095104] __kasan_slab_free+0x10a/0x190 [ 27.095633] kmem_cache_free+0x10d/0x4d0 [ 27.096138] rcu_core+0x8c8/0x2860 [ 27.096579] __do_softirq+0x1b7/0x7d4 [ 27.097049] [ 27.097263] Last potentially related work creation: [ 27.097848] kasan_save_stack+0x22/0x50 [ 27.098339] __kasan_record_aux_stack+0x8e/0xa0 [ 27.098932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.099570] remove_vma+0x139/0x170 [ 27.100010] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.100568] do_vmi_munmap+0x1f1/0x2b0 [ 27.101055] __vm_munmap+0x138/0x3a0 [ 27.101510] __x64_sys_munmap+0x59/0x80 [ 27.102012] do_syscall_64+0x3f/0x90 [ 27.102489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.103111] [ 27.103324] Second to last potentially related work creation: [ 27.103993] kasan_save_stack+0x22/0x50 [ 27.104491] __kasan_record_aux_stack+0x8e/0xa0 [ 27.105055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.105679] remove_vma+0x139/0x170 [ 27.106132] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.106697] do_vmi_munmap+0x1f1/0x2b0 [ 27.107184] mmap_region+0x1f9/0x2660 [ 27.107646] do_mmap+0x854/0xf00 [ 27.108065] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.108548] ksys_mmap_pgoff+0x3af/0x500 [ 27.109049] do_syscall_64+0x3f/0x90 [ 27.109506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.110213] [ 27.110447] The buggy address belongs to the object at ffff88800de17828 [ 27.110447] which belongs to the cache vm_area_struct of size 168 [ 27.111983] The buggy address is located 88 bytes inside of [ 27.111983] freed 168-byte region [ffff88800de17828, ffff88800de178d0) [ 27.113389] [ 27.113605] The buggy address belongs to the physical page: [ 27.114260] page:0000000005fd171a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde17 [ 27.115375] memcg:ffff88800de40c01 [ 27.115797] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.116490] page_type: 0xffffffff() [ 27.116941] raw: 0100000000000200 ffff88800879fc80 ffffea0000379580 dead000000000009 [ 27.117864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de40c01 [ 27.118767] page dumped because: kasan: bad access detected [ 27.119420] [ 27.119637] Memory state around the buggy address: [ 27.120221] ffff88800de17780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 27.121100] ffff88800de17800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 27.121966] >ffff88800de17880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 27.122821] ^ [ 27.123235] ffff88800de17900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.124090] ffff88800de17980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 27.124957] ================================================================== [ 27.126111] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.959949] BUG: Bad rss-counter state mm:0000000043e18bb3 type:MM_FILEPAGES val:33 [ 28.961097] BUG: Bad rss-counter state mm:0000000043e18bb3 type:MM_ANONPAGES val:22 [ 29.443357] BUG: Bad rss-counter state mm:00000000dcc17c9c type:MM_FILEPAGES val:33 [ 29.444410] BUG: Bad rss-counter state mm:00000000dcc17c9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52591' (ECDSA) to the list of known hosts. 2023/06/19 20:40:54 fuzzer started 2023/06/19 20:40:55 dialing manager at localhost:44161 2023/06/19 20:40:55 checking machine... 2023/06/19 20:40:55 checking revisions... [ 30.177597] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:40:55 testing simple program... [ 30.226330] cgroup: Unknown subsys name 'net' [ 30.267738] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:40:52 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=ffff888008c58000 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=00007f24b20d0378 CR3=000000000c6f8000 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=2034353a30343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a30343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f8e2a17c477 RCX=ffffffff81007b62 RDX=ffff88800ef81b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff8880167c7768 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880167c78b0 R13=0000000000000000 R14=ffff88800ef81b40 R15=0000000000092cc0 RIP=ffffffff814c07eb RFL=00000297 [--S-APC] 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 00007f8e29c89900 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=00007ffc52c5a000 CR3=0000000014748000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000