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UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:314:16
shift exponent -1 is negative
CPU: 0 PID: 6508 Comm: syz-executor.0 Not tainted 6.5.0-rc7-syzkaller-gfe4469582053 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:387
 extBalloc fs/jfs/jfs_extent.c:314 [inline]
 extAlloc+0xbb8/0xdd0 fs/jfs/jfs_extent.c:122
 jfs_get_block+0x340/0xb98 fs/jfs/inode.c:248
 __block_write_begin_int+0x460/0x1790 fs/buffer.c:2128
 __block_write_begin fs/buffer.c:2178 [inline]
 block_write_begin+0x98/0x11c fs/buffer.c:2239
 jfs_write_begin+0x44/0x88 fs/jfs/inode.c:299
 generic_perform_write+0x28c/0x588 mm/filemap.c:3923
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4018
 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4044
 do_iter_write+0x65c/0xaa8 fs/read_write.c:860
 vfs_iter_write+0x88/0xac fs/read_write.c:901
 iter_file_splice_write+0x628/0xc58 fs/splice.c:739
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0xe4/0x1c0 fs/splice.c:1145
 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1091
 do_splice_direct+0x20c/0x348 fs/splice.c:1197
 do_sendfile+0x4b8/0xcc4 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
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