[ 30.536634] BUG: Bad rss-counter state mm:00000000a56dd0ab type:MM_FILEPAGES val:33 [ 30.537643] BUG: Bad rss-counter state mm:00000000a56dd0ab type:MM_ANONPAGES val:22 [ 30.707086] ================================================================== [ 30.707992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.708933] Read of size 8 at addr ffff88800dfdd058 by task sshd/219 [ 30.709697] [ 30.709912] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.710915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.711889] Call Trace: [ 30.712209] [ 30.712495] dump_stack_lvl+0x91/0xf0 [ 30.713009] print_report+0xcc/0x620 [ 30.713495] ? __virt_addr_valid+0x102/0x340 [ 30.714045] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715291] kasan_report+0xbe/0xf0 [ 30.715770] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716390] vma_interval_tree_remove+0xc75/0xec0 [ 30.716980] vma_prepare+0xc54/0x11a0 [ 30.717456] __split_vma+0x5af/0x950 [ 30.717920] ? __pfx___split_vma+0x10/0x10 [ 30.718448] ? find_held_lock+0x2c/0x110 [ 30.718962] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.719518] ? lock_is_held_type+0x9f/0x120 [ 30.720059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.720671] ? mtree_range_walk+0x632/0x900 [ 30.721220] ? mas_walk+0x5c7/0x7c0 [ 30.721690] do_vmi_munmap+0x1f1/0x2b0 [ 30.722176] mmap_region+0x1f9/0x2660 [ 30.722675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.723181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.723903] ? __pfx_lock_acquire+0x10/0x10 [ 30.724438] ? __pfx_mmap_region+0x10/0x10 [ 30.724965] ? security_mmap_addr+0x7d/0xa0 [ 30.725492] ? get_unmapped_area+0x1f5/0x3f0 [ 30.726034] do_mmap+0x854/0xf00 [ 30.726481] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.726973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.727530] ksys_mmap_pgoff+0x3af/0x500 [ 30.728033] do_syscall_64+0x3f/0x90 [ 30.728510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729154] RIP: 0033:0x7f9d296f0d82 [ 30.729611] 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 [ 30.731709] RSP: 002b:00007ffdc8e5ab68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.732608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d296f0d82 [ 30.733453] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d28b2a000 [ 30.734293] RBP: 00007f9d28b2a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.735153] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638ffd6cec0 [ 30.735993] R13: 00007ffdc8e5ab80 R14: 00007ffdc8e5abb0 R15: 00007ffdc8e5af10 [ 30.736843] [ 30.737137] [ 30.737352] Allocated by task 212: [ 30.737779] kasan_save_stack+0x22/0x50 [ 30.738278] kasan_set_track+0x25/0x30 [ 30.738783] __kasan_slab_alloc+0x59/0x70 [ 30.739300] kmem_cache_alloc+0x16b/0x370 [ 30.739806] vm_area_dup+0x20/0x160 [ 30.740255] __split_vma+0x170/0x950 [ 30.740716] split_vma+0xc6/0x110 [ 30.741150] mprotect_fixup+0x8d2/0xb30 [ 30.741653] do_mprotect_pkey+0x87e/0xd40 [ 30.742174] __x64_sys_mprotect+0x78/0xc0 [ 30.742704] do_syscall_64+0x3f/0x90 [ 30.743169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743804] [ 30.744017] Freed by task 19: [ 30.744398] kasan_save_stack+0x22/0x50 [ 30.744901] kasan_set_track+0x25/0x30 [ 30.745392] kasan_save_free_info+0x2b/0x50 [ 30.745918] __kasan_slab_free+0x10a/0x190 [ 30.746463] kmem_cache_free+0x10d/0x4d0 [ 30.746970] rcu_core+0x8c8/0x2860 [ 30.747414] __do_softirq+0x1b7/0x7d4 [ 30.747893] [ 30.748108] Last potentially related work creation: [ 30.748693] kasan_save_stack+0x22/0x50 [ 30.749195] __kasan_record_aux_stack+0x8e/0xa0 [ 30.749764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.750405] remove_vma+0x139/0x170 [ 30.750850] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.751399] do_vmi_munmap+0x1f1/0x2b0 [ 30.751878] __vm_munmap+0x138/0x3a0 [ 30.752340] __x64_sys_munmap+0x59/0x80 [ 30.752835] do_syscall_64+0x3f/0x90 [ 30.753311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.753950] [ 30.754162] The buggy address belongs to the object at ffff88800dfdd000 [ 30.754162] which belongs to the cache vm_area_struct of size 168 [ 30.755672] The buggy address is located 88 bytes inside of [ 30.755672] freed 168-byte region [ffff88800dfdd000, ffff88800dfdd0a8) [ 30.757057] [ 30.757270] The buggy address belongs to the physical page: [ 30.757924] page:000000002e14bd29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfdd [ 30.759020] memcg:ffff88800e4bcf01 [ 30.759439] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.760126] page_type: 0xffffffff() [ 30.760578] raw: 0100000000000200 ffff8880087a0c80 ffffea000051f400 dead000000000003 [ 30.761496] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4bcf01 [ 30.762435] page dumped because: kasan: bad access detected [ 30.763100] [ 30.763312] Memory state around the buggy address: [ 30.763889] ffff88800dfdcf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.764753] ffff88800dfdcf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.765592] >ffff88800dfdd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.766436] ^ [ 30.767150] ffff88800dfdd080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.767987] ffff88800dfdd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.768826] ================================================================== [ 30.769962] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.928665] BUG: Bad rss-counter state mm:00000000056d623f type:MM_FILEPAGES val:33 [ 32.929730] BUG: Bad rss-counter state mm:00000000056d623f type:MM_ANONPAGES val:22 [ 33.373278] BUG: Bad rss-counter state mm:000000002cd11fe3 type:MM_FILEPAGES val:33 [ 33.374242] BUG: Bad rss-counter state mm:000000002cd11fe3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25033' (ECDSA) to the list of known hosts. 2023/06/21 06:58:00 fuzzer started 2023/06/21 06:58:00 dialing manager at localhost:36067 2023/06/21 06:58:00 checking machine... 2023/06/21 06:58:00 checking revisions... [ 34.040098] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:58:00 testing simple program... [ 34.088277] cgroup: Unknown subsys name 'net' [ 34.140845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:58:00 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000000fbc70 RCX=00007fcb01e0b344 RDX=00007fff84623c38 RSI=00007fff84623c38 RDI=0000561503ce5330 RBP=00007fff84623cb8 RSP=00007fff84623c30 R8 =0000000000000058 R9 =00000000000fbc70 R10=0000000000000002 R11=00007fcb007a62c0 R12=00007fcb0076ec70 R13=0000561503ce4290 R14=0000000000000006 R15=00007fff84623c40 RIP=00007fcb01e0b475 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 00007fcb01288900 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=00007fcb007a6000 CR3=000000000d84e000 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=7e8a42789393c4b7000000000011adb8 XMM01=a129fc699d3b6085fd4756b4ba7ed859 XMM02=2c67c8bc2e329bc3000000000011b090 XMM03=fb795ef6d65770560000000000121e00 XMM04=14487474d1bafceb00000000000ae988 XMM05=fde997dd86c228ea0000000000132b78 XMM06=806171799158d96700000000001318a8 XMM07=e042d86d42eb936e00000000001220d8 XMM08=80bf715ae4d47d4a000000000011b0f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfb9c RBX=ffffffff85dfdce0 RCX=ffffffff8180a0d4 RDX=0000000000000000 RSI=ffffffff861389b2 RDI=ffffffff85dfdce0 RBP=ffffffff85dfdce0 RSP=ffff8880184ff5e0 R8 =ffffffff861389b2 R9 =ffff8880184ff6d8 R10=0000000000038001 R11=0000000000020cc7 R12=ffffffff85dfdce0 R13=ffffffff85dfdce0 R14=ffffffff85dfdce0 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007f4f2b19a900 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=00007f4f2b179020 CR3=000000000e336000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000