[ 25.567197] BUG: Bad rss-counter state mm:000000006426660d type:MM_FILEPAGES val:33 [ 25.568459] BUG: Bad rss-counter state mm:000000006426660d type:MM_ANONPAGES val:22 [ 25.613391] ================================================================== [ 25.614463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.615408] Read of size 8 at addr ffff88800daf5228 by task sshd/220 [ 25.616216] [ 25.616443] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.617307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.618269] Call Trace: [ 25.618591] [ 25.618877] dump_stack_lvl+0x91/0xf0 [ 25.619375] print_report+0xcc/0x620 [ 25.619860] ? __virt_addr_valid+0x102/0x340 [ 25.620424] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.621046] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.621679] kasan_report+0xbe/0xf0 [ 25.622155] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.622781] vma_interval_tree_remove+0xc75/0xec0 [ 25.623384] vma_prepare+0xc54/0x11a0 [ 25.623871] __split_vma+0x5af/0x950 [ 25.624384] ? __pfx___split_vma+0x10/0x10 [ 25.624947] ? find_held_lock+0x2c/0x110 [ 25.625475] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.626067] ? lock_is_held_type+0x9f/0x120 [ 25.626617] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.627238] ? mtree_range_walk+0x632/0x900 [ 25.627808] ? mas_walk+0x5c7/0x7c0 [ 25.628305] do_vmi_munmap+0x1f1/0x2b0 [ 25.628824] mmap_region+0x1f9/0x2660 [ 25.629318] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.629869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.630593] ? __pfx_lock_acquire+0x10/0x10 [ 25.631139] ? __pfx_mmap_region+0x10/0x10 [ 25.631672] ? security_mmap_addr+0x7d/0xa0 [ 25.632236] ? get_unmapped_area+0x1f5/0x3f0 [ 25.632812] do_mmap+0x854/0xf00 [ 25.633267] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.633785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.634367] ksys_mmap_pgoff+0x3af/0x500 [ 25.634890] do_syscall_64+0x3f/0x90 [ 25.635495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.636350] RIP: 0033:0x7f970486ad82 [ 25.636966] 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 [ 25.639791] RSP: 002b:00007ffc6070c128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.640893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f970486ad82 [ 25.641799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9703ca4000 [ 25.642664] RBP: 00007f9703ca4000 R08: 0000000000000009 R09: 0000000000001000 [ 25.643537] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5cf05c980 [ 25.644448] R13: 00007ffc6070c140 R14: 00007ffc6070c170 R15: 00007ffc6070c4d0 [ 25.645347] [ 25.645646] [ 25.645877] Allocated by task 213: [ 25.646311] kasan_save_stack+0x22/0x50 [ 25.646835] kasan_set_track+0x25/0x30 [ 25.647329] __kasan_slab_alloc+0x59/0x70 [ 25.647886] kmem_cache_alloc+0x16b/0x370 [ 25.648416] vm_area_dup+0x20/0x160 [ 25.648905] __split_vma+0x170/0x950 [ 25.649392] split_vma+0xc6/0x110 [ 25.649845] mprotect_fixup+0x8d2/0xb30 [ 25.650349] do_mprotect_pkey+0x87e/0xd40 [ 25.650886] __x64_sys_mprotect+0x78/0xc0 [ 25.651435] do_syscall_64+0x3f/0x90 [ 25.651931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.652619] [ 25.652849] Freed by task 203: [ 25.653267] kasan_save_stack+0x22/0x50 [ 25.653805] kasan_set_track+0x25/0x30 [ 25.654305] kasan_save_free_info+0x2b/0x50 [ 25.654917] __kasan_slab_free+0x10a/0x190 [ 25.655467] kmem_cache_free+0x10d/0x4d0 [ 25.655998] rcu_core+0x8c8/0x2860 [ 25.656468] __do_softirq+0x1b7/0x7d4 [ 25.656981] [ 25.657203] Last potentially related work creation: [ 25.657826] kasan_save_stack+0x22/0x50 [ 25.658336] __kasan_record_aux_stack+0x8e/0xa0 [ 25.658935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.659581] remove_vma+0x139/0x170 [ 25.660059] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.660653] do_vmi_munmap+0x1f1/0x2b0 [ 25.661175] __vm_munmap+0x138/0x3a0 [ 25.661658] __x64_sys_munmap+0x59/0x80 [ 25.662172] do_syscall_64+0x3f/0x90 [ 25.662647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.663299] [ 25.663517] Second to last potentially related work creation: [ 25.664229] kasan_save_stack+0x22/0x50 [ 25.664749] __kasan_record_aux_stack+0x8e/0xa0 [ 25.665342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.665993] remove_vma+0x139/0x170 [ 25.666448] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.667023] do_vmi_munmap+0x1f1/0x2b0 [ 25.667510] __vm_munmap+0x138/0x3a0 [ 25.667991] __x64_sys_munmap+0x59/0x80 [ 25.668505] do_syscall_64+0x3f/0x90 [ 25.669008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.669661] [ 25.669892] The buggy address belongs to the object at ffff88800daf51d0 [ 25.669892] which belongs to the cache vm_area_struct of size 168 [ 25.671395] The buggy address is located 88 bytes inside of [ 25.671395] freed 168-byte region [ffff88800daf51d0, ffff88800daf5278) [ 25.672881] [ 25.673102] The buggy address belongs to the physical page: [ 25.673786] page:00000000c0deadb6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaf5 [ 25.674895] memcg:ffff88800dc4bc01 [ 25.675322] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.675996] page_type: 0xffffffff() [ 25.676463] raw: 0100000000000200 ffff88800879fc80 ffffea0000359040 dead000000000006 [ 25.677423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc4bc01 [ 25.678343] page dumped because: kasan: bad access detected [ 25.679034] [ 25.679254] Memory state around the buggy address: [ 25.679859] ffff88800daf5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.680771] ffff88800daf5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 25.681652] >ffff88800daf5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 25.682519] ^ [ 25.683085] ffff88800daf5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.683965] ffff88800daf5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.684867] ================================================================== [ 25.685938] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.667305] BUG: Bad rss-counter state mm:00000000cc3aa097 type:MM_FILEPAGES val:33 [ 27.668773] BUG: Bad rss-counter state mm:00000000cc3aa097 type:MM_ANONPAGES val:22 [ 28.218983] BUG: Bad rss-counter state mm:000000002e9b394f type:MM_FILEPAGES val:33 [ 28.220183] BUG: Bad rss-counter state mm:000000002e9b394f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21787' (ECDSA) to the list of known hosts. 2023/06/19 20:32:54 fuzzer started 2023/06/19 20:32:55 dialing manager at localhost:44161 2023/06/19 20:32:55 checking machine... 2023/06/19 20:32:55 checking revisions... [ 28.893579] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:32:55 testing simple program... [ 28.944793] cgroup: Unknown subsys name 'net' [ 28.991318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:32:52 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000001515e073 RCX=ffff88806c6f0398 RDX=000000000000000b RSI=0000000000000001 RDI=000000007f257eee RBP=ffff88800f5219f0 RSP=ffff8880194f77c8 R8 =00000000386b9d24 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff8880194f7830 R15=000000000000000b RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007fbfce614900 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=00007fbfcebc9650 CR3=0000000006944000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=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=00007ffd88b19e08 CR3=000000000e964000 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=2034353a32333a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000