ci2 starts bisection 2023-03-04 07:16:52.799205363 +0000 UTC m=+212827.737894704 bisecting fixing commit since f9ff5644bcc04221bae56f922122f2b7f5d24d62 building syzkaller on 05494336991504e3c6137b89eeddd492e17af6b6 ensuring issue is reproducible on original commit f9ff5644bcc04221bae56f922122f2b7f5d24d62 testing commit f9ff5644bcc04221bae56f922122f2b7f5d24d62 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d14c57f7393eea0ba474181c7a5ae33515a075cd143ecee8fb0ec1b1e1cb63ef all runs: crashed: general protection fault in __d_instantiate testing current HEAD 0988a0ea791999ebbf95693f2676381825b05033 testing commit 0988a0ea791999ebbf95693f2676381825b05033 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 4a33ab381fcc7c49323a94beeae8b02d6f067ca39472f3f878dae55bd8f6d15f run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK reproducer seems to be flaky Reproducer flagged being flaky revisions tested: 2, total time: 52m41.295794817s (build: 37m6.1862376s, test: 12m26.064563462s) the crash still happens on HEAD commit msg: Merge tag 'for-v6.3-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply crash: KASAN: out-of-bounds Write in end_buffer_read_sync ================================================================== BUG: KASAN: out-of-bounds in end_buffer_read_sync+0x89/0x90 Write of size 4 at addr ffffc900033c7820 by task ksoftirqd/0/15 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: dump_stack_lvl+0x12e/0x1d0 print_report+0x163/0x510 kasan_report+0xce/0x100 kasan_check_range+0x283/0x290 end_buffer_read_sync+0x89/0x90 end_bio_bh_io_sync+0x8d/0xe0 blk_update_request+0x3a3/0x1000 blk_mq_end_request+0x39/0x60 blk_done_softirq+0x83/0x120 __do_softirq+0x311/0xafc run_ksoftirqd+0xa6/0x100 smpboot_thread_fn+0x534/0x8e0 kthread+0x232/0x2b0 ret_from_fork+0x1f/0x30 The buggy address belongs to the virtual mapping at [ffffc900033c0000, ffffc900033c9000) created by: copy_process+0x3d5/0x3b60 The buggy address belongs to the physical page: page:ffffea00009413c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2504f memcg:ffff888147409882 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888147409882 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 9800, tgid 9800 (syz-executor.0), ts 301466837271, free_ts 299010948160 get_page_from_freelist+0x3792/0x3910 __alloc_pages+0x291/0x7f0 __vmalloc_node_range+0x700/0x1080 dup_task_struct+0x575/0x690 copy_process+0x3d5/0x3b60 kernel_clone+0x17d/0x700 __x64_sys_clone+0x228/0x290 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: free_unref_page_prepare+0xf0e/0xf70 free_unref_page_list+0x6be/0x960 release_pages+0x1a07/0x1bc0 tlb_flush_mmu+0xe9/0x1e0 tlb_finish_mmu+0xb6/0x1c0 exit_mmap+0x267/0x750 __mmput+0xcb/0x300 exit_mm+0x1c4/0x280 do_exit+0x4d0/0x1cf0 do_group_exit+0x1b9/0x280 get_signal+0x11d1/0x1280 arch_do_signal_or_restart+0x7f/0x660 exit_to_user_mode_loop+0x6a/0xf0 exit_to_user_mode_prepare+0xb1/0x140 syscall_exit_to_user_mode+0x54/0x2d0 do_syscall_64+0x4d/0xc0 Memory state around the buggy address: ffffc900033c7700: 00 00 00 00 00 00 00 00 00 00 00 00 00 f2 f2 f2 ffffc900033c7780: f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 >ffffc900033c7800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc900033c7880: 00 00 00 f2 f2 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 ffffc900033c7900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================