syzkaller login: [ 30.516036] BUG: Bad rss-counter state mm:0000000053fbccf0 type:MM_FILEPAGES val:33 [ 30.516907] BUG: Bad rss-counter state mm:0000000053fbccf0 type:MM_ANONPAGES val:22 [ 30.693410] ================================================================== [ 30.694491] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.695603] Read of size 8 at addr ffff888015fdac20 by task sshd/219 [ 30.696758] [ 30.696993] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.697912] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.698934] Call Trace: [ 30.699274] [ 30.699571] dump_stack_lvl+0x91/0xf0 [ 30.700107] print_report+0xcc/0x620 [ 30.700617] ? __virt_addr_valid+0x102/0x340 [ 30.701205] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.701857] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.702507] kasan_report+0xbe/0xf0 [ 30.703019] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.703719] vma_interval_tree_remove+0xc75/0xec0 [ 30.704382] vma_prepare+0xc54/0x11a0 [ 30.704904] __split_vma+0x5af/0x950 [ 30.705423] ? __pfx___split_vma+0x10/0x10 [ 30.706014] ? find_held_lock+0x2c/0x110 [ 30.706583] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.707210] ? lock_is_held_type+0x9f/0x120 [ 30.707833] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.708492] ? mtree_range_walk+0x632/0x900 [ 30.709100] ? mas_walk+0x5c7/0x7c0 [ 30.709622] do_vmi_munmap+0x1f1/0x2b0 [ 30.710163] mmap_region+0x1f9/0x2660 [ 30.710694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.711250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.712041] ? __pfx_lock_acquire+0x10/0x10 [ 30.712632] ? __pfx_mmap_region+0x10/0x10 [ 30.713223] ? security_mmap_addr+0x7d/0xa0 [ 30.713810] ? get_unmapped_area+0x1f5/0x3f0 [ 30.714413] do_mmap+0x854/0xf00 [ 30.714897] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.715440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.716079] ksys_mmap_pgoff+0x3af/0x500 [ 30.716637] do_syscall_64+0x3f/0x90 [ 30.717173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.717884] RIP: 0033:0x7fbf5ce1cd82 [ 30.718393] 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 [ 30.720763] RSP: 002b:00007ffead839f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.721752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf5ce1cd82 [ 30.722693] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf5c256000 [ 30.723737] RBP: 00007fbf5c256000 R08: 0000000000000009 R09: 0000000000001000 [ 30.724698] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f1127dec0 [ 30.725647] R13: 00007ffead839fa0 R14: 00007ffead839fd0 R15: 00007ffead83a330 [ 30.726600] [ 30.726927] [ 30.727161] Allocated by task 212: [ 30.727631] kasan_save_stack+0x22/0x50 [ 30.728207] kasan_set_track+0x25/0x30 [ 30.728750] __kasan_slab_alloc+0x59/0x70 [ 30.729330] kmem_cache_alloc+0x16b/0x370 [ 30.729901] vm_area_dup+0x20/0x160 [ 30.730408] __split_vma+0x170/0x950 [ 30.730919] split_vma+0xc6/0x110 [ 30.731408] mprotect_fixup+0x8d2/0xb30 [ 30.731970] do_mprotect_pkey+0x87e/0xd40 [ 30.732538] __x64_sys_mprotect+0x78/0xc0 [ 30.733120] do_syscall_64+0x3f/0x90 [ 30.733649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734355] [ 30.734590] Freed by task 212: [ 30.735023] kasan_save_stack+0x22/0x50 [ 30.735579] kasan_set_track+0x25/0x30 [ 30.736140] kasan_save_free_info+0x2b/0x50 [ 30.736731] __kasan_slab_free+0x10a/0x190 [ 30.737408] kmem_cache_free+0x10d/0x4d0 [ 30.737964] rcu_core+0x8c8/0x2860 [ 30.738455] __do_softirq+0x1b7/0x7d4 [ 30.738986] [ 30.739227] Last potentially related work creation: [ 30.739885] kasan_save_stack+0x22/0x50 [ 30.740447] __kasan_record_aux_stack+0x8e/0xa0 [ 30.741075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.741788] remove_vma+0x139/0x170 [ 30.742291] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.742914] do_vmi_munmap+0x1f1/0x2b0 [ 30.743459] __vm_munmap+0x138/0x3a0 [ 30.744000] __x64_sys_munmap+0x59/0x80 [ 30.744559] do_syscall_64+0x3f/0x90 [ 30.745081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745798] [ 30.746042] The buggy address belongs to the object at ffff888015fdabc8 [ 30.746042] which belongs to the cache vm_area_struct of size 168 [ 30.747676] The buggy address is located 88 bytes inside of [ 30.747676] freed 168-byte region [ffff888015fdabc8, ffff888015fdac70) [ 30.749273] [ 30.749516] The buggy address belongs to the physical page: [ 30.750256] page:0000000036728f19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15fda [ 30.751482] memcg:ffff8880145f7e01 [ 30.751968] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.752689] page_type: 0xffffffff() [ 30.753193] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.754221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145f7e01 [ 30.755235] page dumped because: kasan: bad access detected [ 30.755986] [ 30.756227] Memory state around the buggy address: [ 30.756876] ffff888015fdab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.757835] ffff888015fdab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.758785] >ffff888015fdac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.759747] ^ [ 30.760344] ffff888015fdac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.761297] ffff888015fdad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.762244] ================================================================== [ 30.763249] Disabling lock debugging due to kernel taint [ 32.887762] BUG: Bad rss-counter state mm:00000000ba3ee802 type:MM_FILEPAGES val:33 [ 32.888915] BUG: Bad rss-counter state mm:00000000ba3ee802 type:MM_ANONPAGES val:22 [ 33.280122] BUG: Bad rss-counter state mm:000000008b8c5040 type:MM_FILEPAGES val:33 [ 33.281322] BUG: Bad rss-counter state mm:000000008b8c5040 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2424' (ECDSA) to the list of known hosts. 2023/06/20 23:07:33 fuzzer started 2023/06/20 23:07:33 dialing manager at localhost:36067 2023/06/20 23:07:33 checking machine... 2023/06/20 23:07:33 checking revisions... [ 33.986809] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:07:34 testing simple program... [ 34.038163] cgroup: Unknown subsys name 'net' [ 34.089475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:07:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000042 RCX=ffffffff83723e1a RDX=ffff888015c6b680 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000043 RSP=ffff88801977f7b8 R8 =0000000000000004 R9 =000000000000000a R10=0000000000000042 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99cf0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0860 RFL=00000283 [--S---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 00007f93a1d33900 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=00007f93a22ea618 CR3=000000000ee6a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f997e49f000 CR3=000000000da88000 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=558a8d5e4e2dd6901c4c7c60a32bc221 XMM02=000000000011a4a8ec2efd57dc4c00df XMM03=0000000000121aa0a96354c9995bbd46 XMM04=1f6aaa320d5c029200000000000ae988 XMM05=19e9129bd510f2350000000000131c38 XMM06=4fda316b135da52b0000000000131ac0 XMM07=e042d86d42eb936e0000000000121d20 XMM08=a96354c9995bbd46000000000011a508 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000