[ 36.414447] BUG: Bad rss-counter state mm:00000000008b9760 type:MM_FILEPAGES val:33 [ 36.415859] BUG: Bad rss-counter state mm:00000000008b9760 type:MM_ANONPAGES val:22 [ 36.519192] ================================================================== [ 36.519922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.520672] Read of size 8 at addr ffff888009d5ddf0 by task sshd/221 [ 36.521266] [ 36.521438] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.522286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.523068] Call Trace: [ 36.523318] [ 36.523535] dump_stack_lvl+0x91/0xf0 [ 36.523928] print_report+0xcc/0x620 [ 36.524305] ? __virt_addr_valid+0x102/0x340 [ 36.524746] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.525234] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.525725] kasan_report+0xbe/0xf0 [ 36.526098] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.526590] vma_interval_tree_remove+0xc75/0xec0 [ 36.527070] vma_prepare+0xc54/0x11a0 [ 36.527442] __split_vma+0x5af/0x950 [ 36.527817] ? __pfx___split_vma+0x10/0x10 [ 36.528229] ? find_held_lock+0x2c/0x110 [ 36.528649] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.529091] ? lock_is_held_type+0x9f/0x120 [ 36.529512] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.530008] ? mtree_range_walk+0x632/0x900 [ 36.530446] ? mas_walk+0x5c7/0x7c0 [ 36.530843] do_vmi_munmap+0x1f1/0x2b0 [ 36.531169] mmap_region+0x1f9/0x2660 [ 36.531462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.531778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.532209] ? __pfx_lock_acquire+0x10/0x10 [ 36.532527] ? __pfx_mmap_region+0x10/0x10 [ 36.532859] ? security_mmap_addr+0x7d/0xa0 [ 36.533173] ? get_unmapped_area+0x1f5/0x3f0 [ 36.533499] do_mmap+0x854/0xf00 [ 36.533764] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.534062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.534399] ksys_mmap_pgoff+0x3af/0x500 [ 36.534716] do_syscall_64+0x3f/0x90 [ 36.535004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.535390] RIP: 0033:0x7f6359f61d82 [ 36.535669] 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 [ 36.536994] RSP: 002b:00007fff131653f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.537544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6359f61d82 [ 36.538070] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f635939b000 [ 36.538599] RBP: 00007f635939b000 R08: 0000000000000009 R09: 0000000000001000 [ 36.539119] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f70d1b7ec0 [ 36.539644] R13: 00007fff13165410 R14: 00007fff13165440 R15: 00007fff131657a0 [ 36.540167] [ 36.540345] [ 36.540473] Allocated by task 214: [ 36.540739] kasan_save_stack+0x22/0x50 [ 36.541047] kasan_set_track+0x25/0x30 [ 36.541343] __kasan_slab_alloc+0x59/0x70 [ 36.541667] kmem_cache_alloc+0x16b/0x370 [ 36.541976] vm_area_dup+0x20/0x160 [ 36.542252] __split_vma+0x170/0x950 [ 36.542536] split_vma+0xc6/0x110 [ 36.542824] mprotect_fixup+0x8d2/0xb30 [ 36.543130] do_mprotect_pkey+0x87e/0xd40 [ 36.543445] __x64_sys_mprotect+0x78/0xc0 [ 36.543760] do_syscall_64+0x3f/0x90 [ 36.544041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.544428] [ 36.544552] Freed by task 212: [ 36.544804] kasan_save_stack+0x22/0x50 [ 36.545101] kasan_set_track+0x25/0x30 [ 36.545401] kasan_save_free_info+0x2b/0x50 [ 36.545730] __kasan_slab_free+0x10a/0x190 [ 36.546050] kmem_cache_free+0x10d/0x4d0 [ 36.546353] rcu_core+0x8c8/0x2860 [ 36.546634] __do_softirq+0x1b7/0x7d4 [ 36.546926] [ 36.547053] Last potentially related work creation: [ 36.547404] kasan_save_stack+0x22/0x50 [ 36.547704] __kasan_record_aux_stack+0x8e/0xa0 [ 36.548059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.548453] remove_vma+0x139/0x170 [ 36.548723] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.549049] do_vmi_munmap+0x1f1/0x2b0 [ 36.549338] __vm_munmap+0x138/0x3a0 [ 36.549618] __x64_sys_munmap+0x59/0x80 [ 36.549916] do_syscall_64+0x3f/0x90 [ 36.550196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.550586] [ 36.550711] The buggy address belongs to the object at ffff888009d5dd98 [ 36.550711] which belongs to the cache vm_area_struct of size 168 [ 36.551607] The buggy address is located 88 bytes inside of [ 36.551607] freed 168-byte region [ffff888009d5dd98, ffff888009d5de40) [ 36.552467] [ 36.552594] The buggy address belongs to the physical page: [ 36.552989] page:000000004ec6bc0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d5d [ 36.553650] memcg:ffff88801921d401 [ 36.553905] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.554287] page_type: 0xffffffff() [ 36.554565] raw: 0100000000000200 ffff88800879fc80 ffffea000032a140 dead000000000004 [ 36.555134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801921d401 [ 36.555683] page dumped because: kasan: bad access detected [ 36.556089] [ 36.556213] Memory state around the buggy address: [ 36.556568] ffff888009d5dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.557093] ffff888009d5dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.557618] >ffff888009d5dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.558139] ^ [ 36.558638] ffff888009d5de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.559151] ffff888009d5de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.559657] ================================================================== [ 36.560196] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.524645] BUG: Bad rss-counter state mm:00000000457d34ef type:MM_FILEPAGES val:33 [ 38.525863] BUG: Bad rss-counter state mm:00000000457d34ef type:MM_ANONPAGES val:22 [ 38.948628] BUG: Bad rss-counter state mm:000000000133cd85 type:MM_FILEPAGES val:33 [ 38.949879] BUG: Bad rss-counter state mm:000000000133cd85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12931' (ECDSA) to the list of known hosts. 2023/06/19 19:19:43 fuzzer started 2023/06/19 19:19:43 dialing manager at localhost:44161 2023/06/19 19:19:43 checking machine... 2023/06/19 19:19:43 checking revisions... [ 39.703005] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:19:43 testing simple program... [ 39.802525] cgroup: Unknown subsys name 'net' [ 39.895850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:19:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff888014710000 RSI=ffffffff8113af37 RDI=0000000000000007 RBP=ffff88800f306cb0 RSP=ffff88801470fe98 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffff88800f306cb0 R15=0000000000000001 RIP=ffffffff8113af37 RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fce11196900 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=00007fce105b1a40 CR3=000000000c56e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0419f6287dda853c00000000000ae988 XMM05=94ac746169946fc80000000000134de0 XMM06=e4cb8bb95a7664b60000000000133bb8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880100d2488 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8145262a RDI=ffff8880162fd5b4 RBP=ffff8880162fd1c0 RSP=ffff888016c97cc0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801582c800 R13=ffff8880162fd1c0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff81374491 RFL=00000213 [----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 00007f3a192b4900 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=00007ffd54772000 CR3=00000000163c4000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000