[ 24.573933] BUG: Bad rss-counter state mm:00000000a60e5d8b type:MM_FILEPAGES val:33 [ 24.575474] BUG: Bad rss-counter state mm:00000000a60e5d8b type:MM_ANONPAGES val:22 [ 24.714453] ================================================================== [ 24.715348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.716289] Read of size 8 at addr ffff88800e2df140 by task sshd/219 [ 24.717050] [ 24.717269] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.718243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.719208] Call Trace: [ 24.719533] [ 24.719821] dump_stack_lvl+0x91/0xf0 [ 24.720310] print_report+0xcc/0x620 [ 24.720790] ? __virt_addr_valid+0x102/0x340 [ 24.721344] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.721958] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.722611] kasan_report+0xbe/0xf0 [ 24.723090] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.723726] vma_interval_tree_remove+0xc75/0xec0 [ 24.724342] vma_prepare+0xc54/0x11a0 [ 24.724836] __split_vma+0x5af/0x950 [ 24.725316] ? __pfx___split_vma+0x10/0x10 [ 24.725856] ? find_held_lock+0x2c/0x110 [ 24.726387] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.726956] ? lock_is_held_type+0x9f/0x120 [ 24.727494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.728099] ? mtree_range_walk+0x632/0x900 [ 24.728645] ? mas_walk+0x5c7/0x7c0 [ 24.729121] do_vmi_munmap+0x1f1/0x2b0 [ 24.729622] mmap_region+0x1f9/0x2660 [ 24.730141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.730667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.731383] ? __pfx_lock_acquire+0x10/0x10 [ 24.731925] ? __pfx_mmap_region+0x10/0x10 [ 24.732460] ? security_mmap_addr+0x7d/0xa0 [ 24.732996] ? get_unmapped_area+0x1f5/0x3f0 [ 24.733551] do_mmap+0x854/0xf00 [ 24.734005] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.734505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.735069] ksys_mmap_pgoff+0x3af/0x500 [ 24.735578] do_syscall_64+0x3f/0x90 [ 24.736066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.736711] RIP: 0033:0x7febaa03cd82 [ 24.737166] 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 [ 24.739298] RSP: 002b:00007fffc1777978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.740199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febaa03cd82 [ 24.741055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feba9476000 [ 24.741894] RBP: 00007feba9476000 R08: 0000000000000009 R09: 0000000000001000 [ 24.742758] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b50e7c980 [ 24.743599] R13: 00007fffc1777990 R14: 00007fffc17779c0 R15: 00007fffc1777d20 [ 24.744458] [ 24.744751] [ 24.744968] Allocated by task 212: [ 24.745393] kasan_save_stack+0x22/0x50 [ 24.745898] kasan_set_track+0x25/0x30 [ 24.746400] __kasan_slab_alloc+0x59/0x70 [ 24.746919] kmem_cache_alloc+0x16b/0x370 [ 24.747443] vm_area_dup+0x20/0x160 [ 24.747901] __split_vma+0x170/0x950 [ 24.748370] split_vma+0xc6/0x110 [ 24.748810] mprotect_fixup+0x8d2/0xb30 [ 24.749309] do_mprotect_pkey+0x87e/0xd40 [ 24.749828] __x64_sys_mprotect+0x78/0xc0 [ 24.750361] do_syscall_64+0x3f/0x90 [ 24.750833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.751482] [ 24.751699] Freed by task 212: [ 24.752090] kasan_save_stack+0x22/0x50 [ 24.752592] kasan_set_track+0x25/0x30 [ 24.753083] kasan_save_free_info+0x2b/0x50 [ 24.753616] __kasan_slab_free+0x10a/0x190 [ 24.754155] kmem_cache_free+0x10d/0x4d0 [ 24.754664] rcu_core+0x8c8/0x2860 [ 24.755113] __do_softirq+0x1b7/0x7d4 [ 24.755585] [ 24.755801] Last potentially related work creation: [ 24.756384] kasan_save_stack+0x22/0x50 [ 24.756891] __kasan_record_aux_stack+0x8e/0xa0 [ 24.757466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.758123] remove_vma+0x139/0x170 [ 24.758576] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.759134] do_vmi_munmap+0x1f1/0x2b0 [ 24.759622] __vm_munmap+0x138/0x3a0 [ 24.760091] __x64_sys_munmap+0x59/0x80 [ 24.760584] do_syscall_64+0x3f/0x90 [ 24.761058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.761697] [ 24.761914] The buggy address belongs to the object at ffff88800e2df0e8 [ 24.761914] which belongs to the cache vm_area_struct of size 168 [ 24.763399] The buggy address is located 88 bytes inside of [ 24.763399] freed 168-byte region [ffff88800e2df0e8, ffff88800e2df190) [ 24.764797] [ 24.765019] The buggy address belongs to the physical page: [ 24.765673] page:000000001a1f05c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2df [ 24.766757] memcg:ffff88800d159001 [ 24.767187] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.767882] page_type: 0xffffffff() [ 24.768333] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 24.769248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d159001 [ 24.770181] page dumped because: kasan: bad access detected [ 24.770844] [ 24.771062] Memory state around the buggy address: [ 24.771645] ffff88800e2df000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.772498] ffff88800e2df080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.773360] >ffff88800e2df100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.774215] ^ [ 24.774852] ffff88800e2df180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.775706] ffff88800e2df200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.776558] ================================================================== [ 24.777535] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.708435] BUG: Bad rss-counter state mm:00000000d8351f39 type:MM_FILEPAGES val:33 [ 26.709375] BUG: Bad rss-counter state mm:00000000d8351f39 type:MM_ANONPAGES val:22 [ 27.246752] BUG: Bad rss-counter state mm:00000000ee3eabc0 type:MM_FILEPAGES val:33 [ 27.247927] BUG: Bad rss-counter state mm:00000000ee3eabc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3767' (ECDSA) to the list of known hosts. 2023/06/19 20:35:58 fuzzer started 2023/06/19 20:35:58 dialing manager at localhost:44161 2023/06/19 20:35:58 checking machine... 2023/06/19 20:35:58 checking revisions... [ 27.887046] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:35:58 testing simple program... [ 27.933540] cgroup: Unknown subsys name 'net' [ 27.979896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:35:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016837a80 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888016837ad8 RSP=ffff888016837a60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888016837b48 R13=0000000000000000 R14=ffff888016b28000 R15=ffff88800d76a720 RIP=ffffffff811fc897 RFL=00000207 [-----PC] 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 00007fcbfd045900 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=00007ffefaa56fe8 CR3=000000001a11a000 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=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 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09f01 RSI=ffff88806cf09f78 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d1680 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f80 R15=ffff88806cf09a98 RIP=ffffffff81131039 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 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=00007f3affe30aa0 CR3=000000000df76000 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=2038353a35333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a35333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000