[ 27.202072] BUG: Bad rss-counter state mm:000000000f84328c type:MM_FILEPAGES val:33 [ 27.203309] BUG: Bad rss-counter state mm:000000000f84328c type:MM_ANONPAGES val:22 [ 27.353511] ================================================================== [ 27.354442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.355394] Read of size 8 at addr ffff88800e187d08 by task sshd/220 [ 27.356163] [ 27.356381] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.357425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.358399] Call Trace: [ 27.358722] [ 27.359008] dump_stack_lvl+0x91/0xf0 [ 27.359501] print_report+0xcc/0x620 [ 27.359990] ? __virt_addr_valid+0x102/0x340 [ 27.360539] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.361181] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.361800] kasan_report+0xbe/0xf0 [ 27.362281] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.362902] vma_interval_tree_remove+0xc75/0xec0 [ 27.363503] vma_prepare+0xc54/0x11a0 [ 27.363986] __split_vma+0x5af/0x950 [ 27.364459] ? __pfx___split_vma+0x10/0x10 [ 27.365005] ? find_held_lock+0x2c/0x110 [ 27.365528] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.366093] ? lock_is_held_type+0x9f/0x120 [ 27.366631] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.367240] ? mtree_range_walk+0x632/0x900 [ 27.367798] ? mas_walk+0x5c7/0x7c0 [ 27.368275] do_vmi_munmap+0x1f1/0x2b0 [ 27.368771] mmap_region+0x1f9/0x2660 [ 27.369270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.369782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.370516] ? __pfx_lock_acquire+0x10/0x10 [ 27.371059] ? __pfx_mmap_region+0x10/0x10 [ 27.371594] ? security_mmap_addr+0x7d/0xa0 [ 27.372131] ? get_unmapped_area+0x1f5/0x3f0 [ 27.372679] do_mmap+0x854/0xf00 [ 27.373138] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.373637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.374198] ksys_mmap_pgoff+0x3af/0x500 [ 27.374721] do_syscall_64+0x3f/0x90 [ 27.375220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.375896] RIP: 0033:0x7f89fb093d82 [ 27.376367] 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 [ 27.378583] RSP: 002b:00007ffe50166308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.379522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89fb093d82 [ 27.380394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89fa4cd000 [ 27.381293] RBP: 00007f89fa4cd000 R08: 0000000000000009 R09: 0000000000001000 [ 27.382166] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587507baec0 [ 27.383052] R13: 00007ffe50166320 R14: 00007ffe50166350 R15: 00007ffe501666b0 [ 27.383940] [ 27.384242] [ 27.384462] Allocated by task 213: [ 27.384912] kasan_save_stack+0x22/0x50 [ 27.385444] kasan_set_track+0x25/0x30 [ 27.385958] __kasan_slab_alloc+0x59/0x70 [ 27.386511] kmem_cache_alloc+0x16b/0x370 [ 27.387058] vm_area_dup+0x20/0x160 [ 27.387523] __split_vma+0x170/0x950 [ 27.388008] split_vma+0xc6/0x110 [ 27.388464] mprotect_fixup+0x8d2/0xb30 [ 27.388990] do_mprotect_pkey+0x87e/0xd40 [ 27.389524] __x64_sys_mprotect+0x78/0xc0 [ 27.390069] do_syscall_64+0x3f/0x90 [ 27.390556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.391223] [ 27.391444] Freed by task 211: [ 27.391843] kasan_save_stack+0x22/0x50 [ 27.392362] kasan_set_track+0x25/0x30 [ 27.392881] kasan_save_free_info+0x2b/0x50 [ 27.393458] __kasan_slab_free+0x10a/0x190 [ 27.394013] kmem_cache_free+0x10d/0x4d0 [ 27.394539] rcu_core+0x8c8/0x2860 [ 27.394996] __do_softirq+0x1b7/0x7d4 [ 27.395485] [ 27.395710] Last potentially related work creation: [ 27.396320] kasan_save_stack+0x22/0x50 [ 27.396847] __kasan_record_aux_stack+0x8e/0xa0 [ 27.397453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.398188] remove_vma+0x139/0x170 [ 27.398666] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.399236] do_vmi_munmap+0x1f1/0x2b0 [ 27.399747] __vm_munmap+0x138/0x3a0 [ 27.400233] __x64_sys_munmap+0x59/0x80 [ 27.400750] do_syscall_64+0x3f/0x90 [ 27.401266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.401923] [ 27.402140] The buggy address belongs to the object at ffff88800e187cb0 [ 27.402140] which belongs to the cache vm_area_struct of size 168 [ 27.403662] The buggy address is located 88 bytes inside of [ 27.403662] freed 168-byte region [ffff88800e187cb0, ffff88800e187d58) [ 27.405137] [ 27.405358] The buggy address belongs to the physical page: [ 27.406038] page:0000000068ce051d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe187 [ 27.407168] memcg:ffff88800e2bdd01 [ 27.407612] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.408346] page_type: 0xffffffff() [ 27.408820] raw: 0100000000000200 ffff88800879fc80 ffffea0000386440 dead000000000003 [ 27.409797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2bdd01 [ 27.410733] page dumped because: kasan: bad access detected [ 27.411419] [ 27.411643] Memory state around the buggy address: [ 27.412257] ffff88800e187c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 27.413174] ffff88800e187c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 27.414060] >ffff88800e187d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 27.414940] ^ [ 27.415403] ffff88800e187d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 27.416296] ffff88800e187e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.417192] ================================================================== [ 27.418179] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.026967] BUG: Bad rss-counter state mm:000000003b3fdbb7 type:MM_FILEPAGES val:33 [ 30.028480] BUG: Bad rss-counter state mm:000000003b3fdbb7 type:MM_ANONPAGES val:22 [ 30.498861] BUG: Bad rss-counter state mm:00000000e7050874 type:MM_FILEPAGES val:33 [ 30.499835] BUG: Bad rss-counter state mm:00000000e7050874 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12438' (ECDSA) to the list of known hosts. 2023/06/19 21:29:15 fuzzer started 2023/06/19 21:29:15 dialing manager at localhost:44161 2023/06/19 21:29:15 checking machine... 2023/06/19 21:29:15 checking revisions... [ 31.324059] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:29:15 testing simple program... [ 31.363245] cgroup: Unknown subsys name 'net' [ 31.423623] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000055da92dd3360 RCX=0000000000000000 RDX=000055da92dd9890 RSI=0000000000000001 RDI=000055da92dd3620 RBP=000055da92dd3620 RSP=00007ffe42d53b80 R8 =000000000000001e R9 =00007ffe42d68080 R10=00007ffe42d680f0 R11=000000000000e76e R12=0000000000000001 R13=000000000000000c R14=00007ffe42d53bc0 R15=0000000000000000 RIP=00007f20e03e55c1 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f20df872900 00000000 00000000 GS =0000 0000000000000000 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=00007effc6870650 CR3=000000000d682000 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=c5a6a39afce97a905f4c753bcb1197cb XMM02=eff9b2d0a8fce9cb000000000011f6f0 XMM03=2c67c8bc2e329bc3000000000011f818 XMM04=bcffcc17f207b5a900000000000ae988 XMM05=6142d85f9886b2e00000000000134528 XMM06=19e9129bd510f2350000000000133050 XMM07=fb795ef6d657705600000000001234c0 XMM08=2c67c8bc2e329bc3000000000011f818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff810001ce RDI=ffff88806cf09b6c RBP=000000000000000f RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88801c698c60 RIP=ffffffff813ad49e 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 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=00007ffc80ef1a98 CR3=0000000005482000 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=00007fa858d2b5100000556d81e9c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000