ci2 starts bisection 2023-06-21 17:30:42.752788949 +0000 UTC m=+74826.981747202 bisecting fixing commit since 9d6bde853685609a631871d7c12be94fdf8d912e building syzkaller on 4bce1a3e705a8b62de8194bdb28f5eef89c8feec ensuring issue is reproducible on original commit 9d6bde853685609a631871d7c12be94fdf8d912e testing commit 9d6bde853685609a631871d7c12be94fdf8d912e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e5103f778a1232cba0f5b4fe5daf82f641016dae735b65b1ced95c5ca93c1a77 run #0: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #1: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #2: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #4: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #5: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #6: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #7: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #8: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #9: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #10: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #11: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #12: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #13: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #14: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #15: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #16: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #17: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #18: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #19: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data testing current HEAD f67653019430833d5003f16817d7fa85272a6a76 testing commit f67653019430833d5003f16817d7fa85272a6a76 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 0e4c5d10b856bd6552630d3dd6b81eb5a8ba8c62a7dd33d7c1f481ade38900f6 run #0: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #2: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #4: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #5: crashed: KASAN: slab-out-of-bounds Read in ext4_read_inline_data run #6: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #7: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #8: crashed: KASAN: use-after-free Read in ext4_read_inline_data run #9: crashed: KASAN: use-after-free Read in ext4_read_inline_data crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 41m36.344902297s (build: 33m44.031387925s, test: 7m6.664969269s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 5.15.118 crash: KASAN: use-after-free Read in ext4_read_inline_data loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. ================================================================== BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:209 [inline] BUG: KASAN: use-after-free in ext4_read_inline_data+0x1e0/0x290 fs/ext4/inline.c:177 Read of size 20 at addr ffff888019b151a3 by task syz-executor.0/3989 CPU: 0 PID: 3989 Comm: syz-executor.0 Not tainted 5.15.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memcpy+0x20/0x60 mm/kasan/shadow.c:65 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_data+0x1e0/0x290 fs/ext4/inline.c:177 ext4_convert_inline_data_nolock+0xe2/0xbf0 fs/ext4/inline.c:1223 ext4_convert_inline_data+0x419/0x4e0 fs/ext4/inline.c:2056 ext4_fallocate+0x14d/0x2fd0 fs/ext4/extents.c:4705 vfs_fallocate+0x2a5/0xbb0 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xb0/0x100 fs/open.c:337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f00d266a169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f00d19dc168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f00d2789f80 RCX: 00007f00d266a169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f00d26c5ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc6776e8ff R14: 00007f00d19dc300 R15: 0000000000022000 Allocated by task 3909: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x61/0x80 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x1df/0x310 mm/slub.c:3233 vm_area_dup+0x83/0x290 kernel/fork.c:357 dup_mmap kernel/fork.c:556 [inline] dup_mm+0x4da/0x10d0 kernel/fork.c:1457 copy_mm kernel/fork.c:1509 [inline] copy_process+0x68f7/0x69e0 kernel/fork.c:2198 kernel_clone+0xb8/0x770 kernel/fork.c:2601 __do_sys_clone+0xaf/0xf0 kernel/fork.c:2718 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 3910: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xe0/0x110 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook mm/slub.c:1731 [inline] slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x8c/0x390 mm/slub.c:3515 remove_vma+0x103/0x140 mm/mmap.c:188 exit_mmap+0x212/0x540 mm/mmap.c:3197 __mmput+0xed/0x430 kernel/fork.c:1118 exec_mmap fs/exec.c:1036 [inline] begin_new_exec+0xe99/0x2ab0 fs/exec.c:1294 load_elf_binary+0x654/0x3f40 fs/binfmt_elf.c:1001 search_binary_handler fs/exec.c:1734 [inline] exec_binprm fs/exec.c:1775 [inline] bprm_execve fs/exec.c:1844 [inline] bprm_execve+0x669/0x14d0 fs/exec.c:1806 do_execveat_common+0x605/0x7b0 fs/exec.c:1949 do_execve fs/exec.c:2019 [inline] __do_sys_execve fs/exec.c:2095 [inline] __se_sys_execve fs/exec.c:2090 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:2090 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888019b15108 which belongs to the cache vm_area_struct of size 200 The buggy address is located 155 bytes inside of 200-byte region [ffff888019b15108, ffff888019b151d0) The buggy address belongs to the page: page:ffffea000066c540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b15 memcg:ffff88801accba01 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888140006a00 raw: 0000000000000000 00000000000f000f 00000001ffffffff ffff88801accba01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 3909, ts 62154998393, free_ts 62102693498 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0xa76/0x2f80 mm/page_alloc.c:4159 __alloc_pages+0x1b2/0x470 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab+0x2ee/0x440 mm/slub.c:1912 new_slab mm/slub.c:1975 [inline] ___slab_alloc+0xd5d/0x1680 mm/slub.c:3008 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3095 slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x2ee/0x310 mm/slub.c:3233 vm_area_dup+0x83/0x290 kernel/fork.c:357 dup_mmap kernel/fork.c:556 [inline] dup_mm+0x4da/0x10d0 kernel/fork.c:1457 copy_mm kernel/fork.c:1509 [inline] copy_process+0x68f7/0x69e0 kernel/fork.c:2198 kernel_clone+0xb8/0x770 kernel/fork.c:2601 __do_sys_clone+0xaf/0xf0 kernel/fork.c:2718 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1391 free_unref_page_prepare mm/page_alloc.c:3317 [inline] free_unref_page_list+0x16f/0xf40 mm/page_alloc.c:3433 release_pages+0xbe3/0x14c0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x127/0x790 mm/mmu_gather.c:338 exit_mmap+0x1b7/0x540 mm/mmap.c:3188 __mmput+0xed/0x430 kernel/fork.c:1118 exec_mmap fs/exec.c:1036 [inline] begin_new_exec+0xe99/0x2ab0 fs/exec.c:1294 load_elf_binary+0x654/0x3f40 fs/binfmt_elf.c:1001 search_binary_handler fs/exec.c:1734 [inline] exec_binprm fs/exec.c:1775 [inline] bprm_execve fs/exec.c:1844 [inline] bprm_execve+0x669/0x14d0 fs/exec.c:1806 do_execveat_common+0x605/0x7b0 fs/exec.c:1949 do_execve fs/exec.c:2019 [inline] __do_sys_execve fs/exec.c:2095 [inline] __se_sys_execve fs/exec.c:2090 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:2090 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff888019b15080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ffff888019b15100: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888019b15180: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ^ ffff888019b15200: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888019b15280: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ==================================================================