Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.564259] BUG: Bad rss-counter state mm:000000000841bf8e type:MM_FILEPAGES val:33 [ 30.565694] BUG: Bad rss-counter state mm:000000000841bf8e type:MM_ANONPAGES val:22 [ 30.737346] ================================================================== [ 30.738247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.739209] Read of size 8 at addr ffff888018ee8ed8 by task sshd/220 [ 30.739964] [ 30.740184] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.741149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.742126] Call Trace: [ 30.742443] [ 30.742792] dump_stack_lvl+0x91/0xf0 [ 30.743281] print_report+0xcc/0x620 [ 30.743762] ? __virt_addr_valid+0x102/0x340 [ 30.744315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744932] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745561] kasan_report+0xbe/0xf0 [ 30.746043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746696] vma_interval_tree_remove+0xc75/0xec0 [ 30.747300] vma_prepare+0xc54/0x11a0 [ 30.747771] __split_vma+0x5af/0x950 [ 30.748243] ? __pfx___split_vma+0x10/0x10 [ 30.748763] ? find_held_lock+0x2c/0x110 [ 30.749276] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749840] ? lock_is_held_type+0x9f/0x120 [ 30.750372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.751005] ? mtree_range_walk+0x632/0x900 [ 30.751557] ? mas_walk+0x5c7/0x7c0 [ 30.752028] do_vmi_munmap+0x1f1/0x2b0 [ 30.752522] mmap_region+0x1f9/0x2660 [ 30.753000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.753512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.754217] ? __pfx_lock_acquire+0x10/0x10 [ 30.754778] ? __pfx_mmap_region+0x10/0x10 [ 30.755303] ? security_mmap_addr+0x7d/0xa0 [ 30.755830] ? get_unmapped_area+0x1f5/0x3f0 [ 30.756385] do_mmap+0x854/0xf00 [ 30.756845] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.757346] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.757888] ksys_mmap_pgoff+0x3af/0x500 [ 30.758374] do_syscall_64+0x3f/0x90 [ 30.758869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759491] RIP: 0033:0x7fb2cf115d82 [ 30.759924] 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 [ 30.762029] RSP: 002b:00007fff523343e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.762993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2cf115d82 [ 30.763837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2ce54f000 [ 30.764686] RBP: 00007fb2ce54f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.765540] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e28dd3f70 [ 30.766390] R13: 00007fff52334400 R14: 00007fff52334430 R15: 00007fff52334790 [ 30.767281] [ 30.767570] [ 30.767784] Allocated by task 213: [ 30.768219] kasan_save_stack+0x22/0x50 [ 30.768725] kasan_set_track+0x25/0x30 [ 30.769224] __kasan_slab_alloc+0x59/0x70 [ 30.769749] kmem_cache_alloc+0x16b/0x370 [ 30.770273] vm_area_dup+0x20/0x160 [ 30.770771] __split_vma+0x170/0x950 [ 30.771234] split_vma+0xc6/0x110 [ 30.771674] mprotect_fixup+0x8d2/0xb30 [ 30.772171] do_mprotect_pkey+0x87e/0xd40 [ 30.772693] __x64_sys_mprotect+0x78/0xc0 [ 30.773212] do_syscall_64+0x3f/0x90 [ 30.773685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774328] [ 30.774554] Freed by task 204: [ 30.774959] kasan_save_stack+0x22/0x50 [ 30.775459] kasan_set_track+0x25/0x30 [ 30.775951] kasan_save_free_info+0x2b/0x50 [ 30.776479] __kasan_slab_free+0x10a/0x190 [ 30.777009] kmem_cache_free+0x10d/0x4d0 [ 30.777513] rcu_core+0x8c8/0x2860 [ 30.777954] __do_softirq+0x1b7/0x7d4 [ 30.778430] [ 30.778686] Last potentially related work creation: [ 30.779266] kasan_save_stack+0x22/0x50 [ 30.779763] __kasan_record_aux_stack+0x8e/0xa0 [ 30.780330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.780971] remove_vma+0x139/0x170 [ 30.781422] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.781979] do_vmi_munmap+0x1f1/0x2b0 [ 30.782464] __vm_munmap+0x138/0x3a0 [ 30.782972] __x64_sys_munmap+0x59/0x80 [ 30.783472] do_syscall_64+0x3f/0x90 [ 30.783954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784600] [ 30.784818] The buggy address belongs to the object at ffff888018ee8e80 [ 30.784818] which belongs to the cache vm_area_struct of size 168 [ 30.786271] The buggy address is located 88 bytes inside of [ 30.786271] freed 168-byte region [ffff888018ee8e80, ffff888018ee8f28) [ 30.787700] [ 30.787917] The buggy address belongs to the physical page: [ 30.788579] page:0000000003261cc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ee8 [ 30.789664] memcg:ffff888015d08601 [ 30.790094] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.790771] page_type: 0xffffffff() [ 30.791223] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365e40 dead000000000002 [ 30.792131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d08601 [ 30.793022] page dumped because: kasan: bad access detected [ 30.793673] [ 30.793888] Memory state around the buggy address: [ 30.794461] ffff888018ee8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795347] ffff888018ee8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.796192] >ffff888018ee8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.797035] ^ [ 30.797760] ffff888018ee8f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.798622] ffff888018ee8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.799462] ================================================================== [ 30.800567] Disabling lock debugging due to kernel taint [ 32.821932] BUG: Bad rss-counter state mm:00000000a4f85ea9 type:MM_FILEPAGES val:33 [ 32.823681] BUG: Bad rss-counter state mm:00000000a4f85ea9 type:MM_ANONPAGES val:22 [ 33.314917] BUG: Bad rss-counter state mm:0000000027a9221e type:MM_FILEPAGES val:33 [ 33.316089] BUG: Bad rss-counter state mm:0000000027a9221e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13024' (ECDSA) to the list of known hosts. 2023/06/21 07:11:22 fuzzer started 2023/06/21 07:11:22 dialing manager at localhost:36067 2023/06/21 07:11:22 checking machine... 2023/06/21 07:11:22 checking revisions... [ 34.068184] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:11:22 testing simple program... [ 34.123463] cgroup: Unknown subsys name 'net' [ 34.168039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f3ae0828fd8 CR3=000000000c994000 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=bc0c48bf32d002aa17448395ede2744c XMM02=000000000011b060eff9b2d0a8fce9cb XMM03=000000000011b1302c67c8bc2e329bc3 XMM04=e35d4580968925a800000000000ae988 XMM05=e4cb8bb95a7664b60000000000131930 XMM06=c1ac5a27f84e99950000000000130b08 XMM07=e042d86d42eb936e00000000001220f8 XMM08=d3328e58e3f63247000000000011b130 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f2d27c65a70 RCX=00005643a48a2c80 RDX=0000000000000000 RSI=00005643a48a2e30 RDI=0000000000000000 RBP=00007f2d20006ec0 RSP=00007f2d27c65a20 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=00005643a35dea50 R13=00007f2d27c65a70 R14=0000000000000001 R15=00005643a48a2e30 RIP=00007f2d2888372e RFL=00000202 [-------] 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 00007f2d27c66700 00000000 00000000 GS =0000 0000000000000000 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=00007f72be378618 CR3=0000000019ad0000 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=2031323a31313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a31313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000