[ 25.837912] BUG: Bad rss-counter state mm:00000000e8e36a12 type:MM_FILEPAGES val:33 [ 25.839269] BUG: Bad rss-counter state mm:00000000e8e36a12 type:MM_ANONPAGES val:22 [ 25.953850] ================================================================== [ 25.954776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.955737] Read of size 8 at addr ffff888010242058 by task sshd/220 [ 25.956510] [ 25.956734] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.957696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.958663] Call Trace: [ 25.959010] [ 25.959294] dump_stack_lvl+0x91/0xf0 [ 25.959780] print_report+0xcc/0x620 [ 25.960258] ? __virt_addr_valid+0x102/0x340 [ 25.960812] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.961423] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.962043] kasan_report+0xbe/0xf0 [ 25.962516] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.963152] vma_interval_tree_remove+0xc75/0xec0 [ 25.963760] vma_prepare+0xc54/0x11a0 [ 25.964246] __split_vma+0x5af/0x950 [ 25.964721] ? __pfx___split_vma+0x10/0x10 [ 25.965246] ? find_held_lock+0x2c/0x110 [ 25.965773] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.966334] ? lock_is_held_type+0x9f/0x120 [ 25.966901] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.967507] ? mtree_range_walk+0x632/0x900 [ 25.968056] ? mas_walk+0x5c7/0x7c0 [ 25.968538] do_vmi_munmap+0x1f1/0x2b0 [ 25.969030] mmap_region+0x1f9/0x2660 [ 25.969516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.970024] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.970744] ? __pfx_lock_acquire+0x10/0x10 [ 25.971284] ? __pfx_mmap_region+0x10/0x10 [ 25.971811] ? security_mmap_addr+0x7d/0xa0 [ 25.972346] ? get_unmapped_area+0x1f5/0x3f0 [ 25.972897] do_mmap+0x854/0xf00 [ 25.973334] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.973831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.974389] ksys_mmap_pgoff+0x3af/0x500 [ 25.974907] do_syscall_64+0x3f/0x90 [ 25.975383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.976027] RIP: 0033:0x7f0ef6992d82 [ 25.976486] 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 [ 25.978626] RSP: 002b:00007fff122d9158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.979545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ef6992d82 [ 25.980386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ef5dcc000 [ 25.981241] RBP: 00007f0ef5dcc000 R08: 0000000000000009 R09: 0000000000001000 [ 25.982080] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6a9d41d90 [ 25.982932] R13: 00007fff122d9170 R14: 00007fff122d91a0 R15: 00007fff122d9500 [ 25.983782] [ 25.984073] [ 25.984294] Allocated by task 213: [ 25.984722] kasan_save_stack+0x22/0x50 [ 25.985226] kasan_set_track+0x25/0x30 [ 25.985724] __kasan_slab_alloc+0x59/0x70 [ 25.986249] kmem_cache_alloc+0x16b/0x370 [ 25.986767] vm_area_dup+0x20/0x160 [ 25.987241] __split_vma+0x170/0x950 [ 25.987705] split_vma+0xc6/0x110 [ 25.988148] mprotect_fixup+0x8d2/0xb30 [ 25.988656] do_mprotect_pkey+0x87e/0xd40 [ 25.989196] __x64_sys_mprotect+0x78/0xc0 [ 25.989716] do_syscall_64+0x3f/0x90 [ 25.990193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.990843] [ 25.991057] Freed by task 213: [ 25.991459] kasan_save_stack+0x22/0x50 [ 25.991962] kasan_set_track+0x25/0x30 [ 25.992452] kasan_save_free_info+0x2b/0x50 [ 25.992990] __kasan_slab_free+0x10a/0x190 [ 25.993519] kmem_cache_free+0x10d/0x4d0 [ 25.994028] rcu_core+0x8c8/0x2860 [ 25.994470] __do_softirq+0x1b7/0x7d4 [ 25.994958] [ 25.995173] Last potentially related work creation: [ 25.995755] kasan_save_stack+0x22/0x50 [ 25.996258] __kasan_record_aux_stack+0x8e/0xa0 [ 25.996833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.997471] remove_vma+0x139/0x170 [ 25.997923] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.998477] do_vmi_munmap+0x1f1/0x2b0 [ 25.998978] __vm_munmap+0x138/0x3a0 [ 25.999444] __x64_sys_munmap+0x59/0x80 [ 25.999951] do_syscall_64+0x3f/0x90 [ 26.000425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.001073] [ 26.001289] The buggy address belongs to the object at ffff888010242000 [ 26.001289] which belongs to the cache vm_area_struct of size 168 [ 26.002767] The buggy address is located 88 bytes inside of [ 26.002767] freed 168-byte region [ffff888010242000, ffff8880102420a8) [ 26.004178] [ 26.004395] The buggy address belongs to the physical page: [ 26.005078] page:00000000a804fa4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10242 [ 26.006192] memcg:ffff88800f6ec801 [ 26.006625] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.007343] page_type: 0xffffffff() [ 26.007797] raw: 0100000000000200 ffff88800879fc80 ffffea0000317500 dead000000000005 [ 26.008713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6ec801 [ 26.009615] page dumped because: kasan: bad access detected [ 26.010270] [ 26.010489] Memory state around the buggy address: [ 26.011071] ffff888010241f00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.011924] ffff888010241f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.012772] >ffff888010242000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.013630] ^ [ 26.014347] ffff888010242080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 26.015225] ffff888010242100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.016071] ================================================================== [ 26.017131] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.534505] BUG: Bad rss-counter state mm:00000000cac4c6e9 type:MM_FILEPAGES val:33 [ 28.535800] BUG: Bad rss-counter state mm:00000000cac4c6e9 type:MM_ANONPAGES val:22 [ 29.060525] BUG: Bad rss-counter state mm:000000003c4f9589 type:MM_FILEPAGES val:33 [ 29.061859] BUG: Bad rss-counter state mm:000000003c4f9589 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7813' (ECDSA) to the list of known hosts. 2023/06/20 04:11:57 fuzzer started 2023/06/20 04:11:57 dialing manager at localhost:44161 2023/06/20 04:11:57 checking machine... 2023/06/20 04:11:57 checking revisions... [ 29.706101] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:11:57 testing simple program... [ 29.751347] cgroup: Unknown subsys name 'net' [ 29.789764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:54 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff8880102a9f34 RBP=ffff8880102a9b40 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f413e75319d R13=0000000000000000 R14=ffff8880102a9b40 R15=ffff88800e2c48d0 RIP=ffffffff8135bd46 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 00007f413de89900 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=00007fb411e23650 CR3=000000000d90a000 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=211bbd223122518ace4a6c640283750d XMM02=000000000011fdf0eff9b2d0a8fce9cb XMM03=000000000011fec02c67c8bc2e329bc3 XMM04=a2fd6945426d330d00000000000ae988 XMM05=1503aca7b8796fa90000000000134820 XMM06=4fda316b135da52b00000000001332a0 XMM07=fb795ef6d65770560000000000123ad0 XMM08=2c67c8bc2e329bc3000000000011fe60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007ffd16ca3808 CR3=0000000019c2e000 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=2036353a31313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a31313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000